I2CLCDPCF8574
SwordfishUser.I2CLCDPCF8574 History
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Changed line 16 from:
The SDA and SCL lines will require the use of a pullup resistor since it is used as a bidirectional open-drain.
to:
The SCL and SDA lines will require the use of a pullup resistor since it is used as a bidirectional open-drain.
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=code [=Initialize()=]
to:
=code [=Initialize($4E)=]
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The modules default I2C address is set to $4E, this was the address that my test boards was set too, but you are able to change the address to suit. As the module is '''self Initialized''' you will need to disable the Initialize() options within the module, and adding the '''Initialize()''' code to your main prog with the included address within the parenthesis.
to:
The modules default I2C address is set to $4E, this was the address that my test boards was set too, but you are able to change the address to suit. As the module is '''self Initialized''' you will need to disable the Initialize() options within the module, and add the '''Initialize()''' code to your main prog with the included address within the parenthesis.
Changed lines 27-28 from:
The module default I2C address is set to $4E, this was the address that my test boards was set too, but you are able to change the address. As the module is '''self Initialized''' you will need to disable the Initialize() options within the module, and adding the '''Initialize()''' code to your main prog with the included address within the parenthesis.
Change the following module options to false
Change the following module options to false
to:
The modules default I2C address is set to $4E, this was the address that my test boards was set too, but you are able to change the address to suit. As the module is '''self Initialized''' you will need to disable the Initialize() options within the module, and adding the '''Initialize()''' code to your main prog with the included address within the parenthesis.
'''Example:''' Change the following module options to false
'''Example:''' Change the following module options to false
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And add the following code to your main prog (with your desired address).
=code [=Initialize()=]
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\\\
to:
\
!!!Module Options
The module default I2C address is set to $4E, this was the address that my test boards was set too, but you are able to change the address. As the module is '''self Initialized''' you will need to disable the Initialize() options within the module, and adding the '''Initialize()''' code to your main prog with the included address within the parenthesis.
Change the following module options to false
=code [=
#option I2CLCD_INITIALIZE = true=]
!!!Module Options
The module default I2C address is set to $4E, this was the address that my test boards was set too, but you are able to change the address. As the module is '''self Initialized''' you will need to disable the Initialize() options within the module, and adding the '''Initialize()''' code to your main prog with the included address within the parenthesis.
Change the following module options to false
=code [=
#option I2CLCD_INITIALIZE = true=]
Deleted lines 37-40:
Change the following module options to false
=code [=
#option I2CLCD_INITIALIZE = true=]
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Change the following module options to false
=code [=
#option I2CLCD_INITIALIZE = true=]
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[[Attach:I2CLCDv1.zip | I2CLCDv1.zip]]
to:
[[Attach:I2CLCDv1.zip | Download I2CLCD Library V1.0]] \\
I2CLCDv1.zip
I2CLCDv1.zip
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*'''Note''' This library will require you to use the latest version of Swordfish as of v2.2.3.3
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*'''Note:''' %blue%This library will require you to use the latest version of Swordfish as of v2.2.3.3
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\\\
!!! Sample Code (Software SI2C)
!!! Sample Code (Software SI2C)
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!!! Sample Code (Software SI2C)
\\
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\\\\\
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'''This sample code to show how to use the I2CLCD library with the software SI2C options. You don't need to include the I2C/S12C libraries as the module takes care of that for you.'''
to:
'''This sample code shows you how to use the I2CLCD library with the software SI2C options. You don't need to include the I2C/S12C libraries as the module takes care of that for you. You just need to add the optional lines of code and set your SDA, SCL pins.'''
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'''Sample code to show how to use the I2CLCD library with the software SI2C options. You don't need to include the I2C/S12C libraries as the module takes care of that for you.'''
to:
'''This sample code to show how to use the I2CLCD library with the software SI2C options. You don't need to include the I2C/S12C libraries as the module takes care of that for you.'''
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'''Sample code to show how to use the I2CLCD library with the software SI2C options.'''
* You don't need to include the I2C/S12C libraries as the module takes care of that for you.
* You don't need to include
to:
'''Sample code to show how to use the I2CLCD library with the software SI2C options. You don't need to include the I2C/S12C libraries as the module takes care of that for you.'''
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'''Sample code to show how to use the I2CLCD library with the software SI2C options.'''
to:
'''Sample code to show how to use the I2CLCD library with the software SI2C options.'''
* You don't need to include the I2C/S12C libraries as the module takes care of that for you.
* You don't need to include the I2C/S12C libraries as the module takes care of that for you.
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'''Note'''
This library will require you to use the latest version of Swordfish as of v2.2.3.3
This library will require you to use the latest version of Swordfish as of v2.2.3.3
to:
*'''Note''' This library will require you to use the latest version of Swordfish as of v2.2.3.3
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!!!! About PCF8574
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!!!! About PCF8574
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\\\\\\\
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Attach:i2clcd1.jpg
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(:Attach:i2clcd1.jpg:)
%lfloat%https://www.sfcompiler.co.uk/wiki/wiki-uploads/SwordfishUser/I2CLCDPCF8574/i2clcd1.jpg
'''Sample code to show how to use the I2CLCD library with the software SI2C options.'''
%lfloat%https://www.sfcompiler.co.uk/wiki/wiki-uploads/SwordfishUser/I2CLCDPCF8574/i2clcd1.jpg
'''Sample code to show how to use the I2CLCD library with the software SI2C options.'''
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Sample code to show how to use the I2CLCD library with software I2C.
\\\\\\\
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\\
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\\
%lfloat%https://www.sfcompiler.co.uk/wiki/wiki-uploads/SwordfishUser/I2CLCDPCF8574/LCD24line.jpg
'''Sample code to show how to use the I2CLCD library with the software SI2C options.'''
\\\\\\\\\
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Attach:LCD24line.jpg
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(:Attach:LCD24line.jpg:)
----
%lfloat%https://www.sfcompiler.co.uk/wiki/wiki-uploads/SwordfishUser/I2CLCDPCF8574/LCD24line.jpg |
Sample code to show how to use the I2CLCD library with software I2C.
\\\\\\\\\
----
%lfloat%https://www.sfcompiler.co.uk/wiki/wiki-uploads/SwordfishUser/I2CLCDPCF8574/LCD24line.jpg |
Sample code to show how to use the I2CLCD library with software I2C.
\\\\\\\\\
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Attach:i2clcd1.jpg
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Attach:https://www.sfcompiler.co.uk/wiki/wiki-uploads/SwordfishUser/I2CLCDPCF8574/LCD24line.jpg
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!Insert picture of lcd board here
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!Insert picture of lcd board here
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!Insert picture of lcd showing text here
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Attach:https://www.sfcompiler.co.uk/wiki/wiki-uploads/SwordfishUser/I2CLCDPCF8574/i2clcd1.jpg
http://pmichaud.com/img/misc/pc.jpg"Paper
clips" | [- %newwin% [[
Wikipedia:Paper_clips | Paper clips ]]
are ''fun'' to work with. -]
Attach:file.ext
http://pmichaud.com/img/misc/pc.jpg"Paper
clips" | [- %newwin% [[
Wikipedia:Paper_clips | Paper clips ]]
are ''fun'' to work with. -]
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Attach:https://www.sfcompiler.co.uk/wiki/wiki-uploads/SwordfishUser/I2CLCDPCF8574/1602lcd.jpg
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Attach:https://www.sfcompiler.co.uk/wiki/wiki-uploads/SwordfishUser/I2CLCDPCF8574/i2clcd1
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Attach:https://www.sfcompiler.co.uk/wiki/wiki-uploads/SwordfishUser/I2CLCDPCF8574/i2clcd1.jpg
http://pmichaud.com/img/misc/pc.jpg"Paper
clips" | [- %newwin% [[
Wikipedia:Paper_clips | Paper clips ]]
are ''fun'' to work with. -]
Attach:file.ext
http://pmichaud.com/img/misc/pc.jpg"Paper
clips" | [- %newwin% [[
Wikipedia:Paper_clips | Paper clips ]]
are ''fun'' to work with. -]
Attach:file.ext
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Attach:file.ext
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Attach:https://www.sfcompiler.co.uk/wiki/wiki-uploads/SwordfishUser/I2CLCDPCF8574/i2clcd1
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Attach:file.ext
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Serial clock (SCL), serial data (SDA)) @ 100kHz.
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Serial clock (SCL), serial data (SDA)) @ 100kHz.
to:
Serial clock (SCL), serial data (SDA)) @ 100kHz.
Changed line 17 from:
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Serial clock (SCL), serial data (SDA)) @ 100kHz.
Changed line 17 from:
Serial clock (SCL), serial data (SDA)) @ 100kHz.
to:
Serial clock (SCL), serial data (SDA)) @ 100kHz.
Changed lines 16-17 from:
The SDA and SCL lines will require the use of a pullup resistor since it is used as a bidirectional open-drain. Serial clock (SCL), serial data (SDA)) @ 100kHz.
to:
The SDA and SCL lines will require the use of a pullup resistor since it is used as a bidirectional open-drain.
Serial clock (SCL), serial data (SDA)) @ 100kHz.
Serial clock (SCL), serial data (SDA)) @ 100kHz.
Changed line 6 from:
The module default I2C address is set to $4E, this was the address that my test boards was set too, but you are able to change the address. As the module is '''self Initialized''' you will need to disable the Initialize() options within the module, and adding the '''Initialize()''' to your main prog with the included address within the parenthesis.
to:
The module default I2C address is set to $4E, this was the address that my test boards was set too, but you are able to change the address. As the module is '''self Initialized''' you will need to disable the Initialize() options within the module, and adding the '''Initialize()''' code to your main prog with the included address within the parenthesis.
Changed line 6 from:
The module default I2C address is set to $4E, this was the address that my test boards was set too, but you are able to change the address. As the module is '''self Initialized''' you will need to disable the Initialize() options within the module, and adding the '''Initialize()'' to your main prog with the included address within the parenthesis.
to:
The module default I2C address is set to $4E, this was the address that my test boards was set too, but you are able to change the address. As the module is '''self Initialized''' you will need to disable the Initialize() options within the module, and adding the '''Initialize()''' to your main prog with the included address within the parenthesis.
Changed line 6 from:
The module default I2C address is set to $4E, this was the address that my test boards was set too, but you are able to change the address. As the module is '+self Initialized+'. by disabling the Initialize() options, and adding the Initialize() to your main prog with the included address within the parenthesis.
to:
The module default I2C address is set to $4E, this was the address that my test boards was set too, but you are able to change the address. As the module is '''self Initialized''' you will need to disable the Initialize() options within the module, and adding the '''Initialize()'' to your main prog with the included address within the parenthesis.
Changed lines 5-6 from:
to:
The module default I2C address is set to $4E, this was the address that my test boards was set too, but you are able to change the address. As the module is '+self Initialized+'. by disabling the Initialize() options, and adding the Initialize() to your main prog with the included address within the parenthesis.
Added lines 5-7:
The module default I2C address is set to $4E, this was the address that my test boards was set too, but you are able to change in your own main prog by disabling the Initialize() options and adding it to your own my prog with your desired address, see the module for more info.
Changed line 14 from:
The SDA and SCL lines will require the use of a pullup resistor since it is used as a bidirectional open-drain pin. Serial clock (SCL), serial data (SDA)) @ 100kHz.
to:
The SDA and SCL lines will require the use of a pullup resistor since it is used as a bidirectional open-drain. Serial clock (SCL), serial data (SDA)) @ 100kHz.
Changed line 409 from:
[[Attach:I2CLCDv1.0.zip | I2CLCDv1.0.zip]]
to:
[[Attach:I2CLCDv1.zip | I2CLCDv1.zip]]
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[[Attach:I2CLCDv1.0.zip | I2CLCDv1.0.zip]]
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https://www.sfcompiler.co.uk/wiki/wiki-uploads/SwordfishUser/I2CLCDPCF8574/I2CLcd
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'''Note'''This library will require you to use the latest version of Swordfish as of v2.2.3.3
to:
'''Note'''
This library will require you to use the latest version of Swordfish as of v2.2.3.3
This library will require you to use the latest version of Swordfish as of v2.2.3.3
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'''Note'''This library will require you to use the latest version of Swordfish as of v2.2.3.3
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The SDA and SCL lines will require the use of
to:
The SDA and SCL lines will require the use of a pullup resistor since it is used as a bidirectional open-drain pin. Serial clock (SCL), serial data (SDA)) @ 100kHz.
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=]
to:
=]
!!! Download Library
Attach:file.ext
!!! Download Library
Attach:file.ext
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With
The SCL and SDA pins can be allocated to any port pins
This will also allow you if you wanted too, add up to 8 LCDs to your project and control them all using a single microcontroller and with only 2-wires.
to:
And with solder pads, A0 A1 A2. You can solder any bit of them to make it a different address if needed. The board has a power led as well as a voltage regulator and most importantly a header to connect your I2C 2-wires (SCL, SDA).
Serial clock (SCL), serial data (SDA)) @ 100kHz.
The SDA and SCL lines will require the use of a pullup resistor since it is used as a bidirectional open-drain pin.
Serial clock (SCL), serial data (SDA)) @ 100kHz.
The SDA and SCL lines will require the use of a pullup resistor since it is used as a bidirectional open-drain pin.
Changed line 4 from:
I have worked with the I2CLCD module to get it as close as possible to the original Swordfish LCD module for the HD44780 display. This allows you to use the same LCD instructions as you would with the Swordfish LCD.
to:
I have worked with the I2CLCD module to get it as close as possible to the original Swordfish LCD module for the HD44780 display. This allows you to use the same LCD instructions as you would with the Swordfish LCD library.
Changed lines 9-10 from:
With solder pads, A0 A1 A2. You can solder any bit of them to make it a different address if needed, more than LCD I2C expander boards. The board has a power indicator as well as a voltage regulator and most importantly a header to connect your I2C 2-wires (SCL, SDA).
to:
With solder pads, A0 A1 A2. You can solder any bit of them to make it a different address if needed. The board has a power indicator as well as a voltage regulator and most importantly a header to connect your I2C 2-wires (SCL, SDA).
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With solder pads, A0 A1 A2. You can solder any bit of them to make it 0 if needed to address more than LCD I2C expander boards. The board has a power indicator as well as a voltage regulator and most importantly a header to connect your I2C 2-wires (SCL, SDA).
to:
With solder pads, A0 A1 A2. You can solder any bit of them to make it a different address if needed, more than LCD I2C expander boards. The board has a power indicator as well as a voltage regulator and most importantly a header to connect your I2C 2-wires (SCL, SDA).
Changed line 4 from:
I have worked with the I2CLCD module to get it as close as possible to the original Swordfish LCD module for the HD44780 display. This allows you to use the same LCD instructions as you would with Swordfish LCD.
to:
I have worked with the I2CLCD module to get it as close as possible to the original Swordfish LCD module for the HD44780 display. This allows you to use the same LCD instructions as you would with the Swordfish LCD.
Changed line 2 from:
This module allows you to use the I2C LCD Displays that are interfaced with the PCF8574 expander chip. It works with both hardware and software libraries. And it has been tested with 2 line and 4line displays.
to:
This module allows you to use the I2C LCD Displays that are interfaced with the PCF8574 expander chip. It works with both the hardware and software I2C libraries. And supports both 16x2 line and 16x4 line displays with no configuration.
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!!!! About PCF8574
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!! The I2CLCD Module
to:
!!!! The I2CLCD Module
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!! About PCF8574
to:
!!!! About PCF8574
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The module also allows you to use both 2 line or 4 line displays,
The I2CLCD module will work with both the I2C hardware and SI2C software modules.
to:
!! The I2CLCD Module
This module allows you to use the I2C LCD Displays that are interfaced with the PCF8574 expander chip. It works with both hardware and software libraries. And it has been tested with 2 line and 4line displays.
!! About PCF8574
This module allows you to use the I2C LCD Displays that are interfaced with the PCF8574 expander chip. It works with both hardware and software libraries. And it has been tested with 2 line and 4line displays.
!! About PCF8574
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https://www.sfcompiler.co.uk/phpBB3/download/file.php?mode=view&id=166&sid=0f5a9b59cfd4d37f7c06a6baf3044d08
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http://www.sfcompiler.co.uk/wiki/uploads/DavidBarker/Ethernet/Images/ms_ENC28J60.gif
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The module also allows you to use both 2 line or 4 line displays, with no configuration.
The I2CLCD module will work with both the I2C hardware and SI2C software modules.
I have worked with the I2CLCD module to get it as close as possible to the original Swordfish LCD module for the HD44780 display. This allows you to use the same LCD instructions as you would with Swordfish LCD.
The I2CLCD module will work with both the I2C hardware and SI2C software modules.
I have worked with the I2CLCD module to get it as close as possible to the original Swordfish LCD module for the HD44780 display. This allows you to use the same LCD instructions as you would with Swordfish LCD.
Changed lines 17-20 from:
I have worked with the I2CLCD module to get it as close as possible to the original Swordfish LCD module for the HD44780 display. This allows you to use the same LCD instructions as you would with Swordfish LCD.
to:
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The module also allows you to use both 2 line or 4 line displays, with no configuration.
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to:
The SCL and SDA pins can be allocated to any port pins. The SDA line will require the use of a pullup resistor since it is used as a bidirectional open-drain pin.
Deleted lines 12-13:
The SCL and SDA pins can be allocated to any port pins. The SDA line will require the use of a pullup resistor since it is used as a bidirectional open-drain pin.
Changed line 11 from:
I have worked with the I2CLCD module to get it as close as possible to the original Swordfish LCD module for the HD44780 display.
to:
I have worked with the I2CLCD module to get it as close as possible to the original Swordfish LCD module for the HD44780 display. This allows you to use the same LCD instructions as you would with Swordfish LCD.
Changed lines 10-11 from:
I have worked with the I2CLCD module to get it as close as possible to the original to the build in Swordfish LCD module for the HD44780 display.
to:
I have worked with the I2CLCD module to get it as close as possible to the original Swordfish LCD module for the HD44780 display.
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I have worked with the module to get it as close as possible to the original to the build in Swordfish LCD module for the HD44780 display.
to:
I have worked with the I2CLCD module to get it as close as possible to the original to the build in Swordfish LCD module for the HD44780 display.
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The module will work with both the I2C hardware and SI2C software modules.
to:
The I2CLCD module will work with both the I2C hardware and SI2C software modules.
Changed line 10 from:
I have worked the module to be as close as possible with the original LCD module for the HD44780 display.
to:
I have worked with the module to get it as close as possible to the original to the build in Swordfish LCD module for the HD44780 display.
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The module will work with both the I2S hardware and SI2C software modules.
to:
The module will work with both the I2C hardware and SI2C software modules.
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This module allows you to use the I2C LCD Displays that are interfaced with the PCF8574.
to:
This module allows you to use the I2C LCD Displays that are interfaced with the PCF8574 expander chip.
The PCF8574 module board is a breakout board for the I2C IO Expander chip PCF8574 designed for LCD interfacing via a 16-pin header. There is a jumper to turn on or off the LCD backlight. As well as a potentiometer to adjust the LCD screen contrast.
With solder pads, A0 A1 A2. You can solder any bit of them to make it 0 if needed to address more than LCD I2C expander boards. The board has a power indicator as well as a voltage regulator and most importantly a header to connect your I2C 2-wires (SCL, SDA).
The PCF8574 provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)) @ 100kHz.
The PCF8574 module board is a breakout board for the I2C IO Expander chip PCF8574 designed for LCD interfacing via a 16-pin header. There is a jumper to turn on or off the LCD backlight. As well as a potentiometer to adjust the LCD screen contrast.
With solder pads, A0 A1 A2. You can solder any bit of them to make it 0 if needed to address more than LCD I2C expander boards. The board has a power indicator as well as a voltage regulator and most importantly a header to connect your I2C 2-wires (SCL, SDA).
The PCF8574 provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)) @ 100kHz.
Changed lines 18-24 from:
With solder pads, A0 A1 A2 which if left as is will be 1 1 1 (pulled-up). You can solder any bit of them to make it 0 if needed to address more than LCD I2C expander board. The board has a power indicator as well as a voltage regulator and most importantly a header to connect your I2C 2-wires (SCL, SDA).
I2C IO Expander PCF8574
The PCF8574 provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)) @ 100kHz. The system master can read from the input port or write to the output port through a single register.
to:
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The PCF8574/74A provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)) @ 100kHz. The system master can read from the input port or write to the output port through a single register.
to:
The PCF8574 provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)) @ 100kHz. The system master can read from the input port or write to the output port through a single register.
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The SCL and SDA pins can be allocated to any port pins. The SDA line will require the use of a pullup resistor since it is used as a bidirectional open-drain pin.
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!!! Sampele Code (BarGraphs)
to:
!!! Sample Code (BarGraphs)
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=]
!!! Sampele Code (BarGraphs)
=code [=
' Draws two graphs to the LCD display lines..
' gavin wiggett 2020
Device = 18F2550
Clock = 20
// import libraries...
Include "I2CLCD.bas"
Include "utils.bas"
Include "convert.bas"
// refresh speed...
Const UpdateMS = 50
// initialise bit patterns...
// programmable characters are available that use codes $00 to $07.
// Create the bit patterns that make up the bars in the LCD's CGRAM.
// The vertical bars are made up of 8 identical bit patterns
Const CGRAM(32) As Byte = ($00,$00,$00,$00,$00,$00,$00,$00, // base bar
$10,$10,$10,$10,$10,$10,$10,$00, // 8 x %10000 = |
$14,$14,$14,$14,$14,$14,$14,$00, // 8 x %10100 = ||
$15,$15,$15,$15,$15,$15,$15,$00) // 8 x %10101 = |||
// output byte pRepValue times...
NoInline Sub Rep(pValue, pRepValue As Byte)
Dim Index As Byte
Index = 0
While Index < pRepValue
I2CLCD.Write(pValue)
Inc(Index)
Wend
End Sub
// display the bar...
NoInline Sub Bargraph(pLine, pBarValue As Byte)
Const BASE_BAR = 0 // ASCII value of 0 bar (blank)
Const FULL_BAR = 3 // ASCII value of ||| bar
Const BAR_WIDTH = 16 // Max width in characters of bar
Const MAX_BAR_COUNT = BAR_WIDTH * 3 // Max bar counts
Dim NumberOfBars As Byte = pBarValue / 3
Dim Balance As Byte = pBarValue Mod 3
I2CLCD.MoveCursor(pLine,1)
Rep(FULL_BAR,NumberOfBars)
I2CLCD.Write(Balance)
Rep(BASE_BAR,BAR_WIDTH - (NumberOfBars + Min(Balance,1)))
End Sub
// loop index
Dim Index As Byte
// starting point of prog...
I2CLCD.Write(CGRAM)
DelayMS(2000)
// display the bar
While true
For Index = 0 To 48
Bargraph(1,Index)
Bargraph(2,48 - Index)
DelayMS(UpdateMS)
Next
For Index = 48 To 0 Step -1
Bargraph(1,Index)
Bargraph(2,48 - Index)
DelayMS(UpdateMS)
Next
Wend
!!! Sampele Code (BarGraphs)
=code [=
' Draws two graphs to the LCD display lines..
' gavin wiggett 2020
Device = 18F2550
Clock = 20
// import libraries...
Include "I2CLCD.bas"
Include "utils.bas"
Include "convert.bas"
// refresh speed...
Const UpdateMS = 50
// initialise bit patterns...
// programmable characters are available that use codes $00 to $07.
// Create the bit patterns that make up the bars in the LCD's CGRAM.
// The vertical bars are made up of 8 identical bit patterns
Const CGRAM(32) As Byte = ($00,$00,$00,$00,$00,$00,$00,$00, // base bar
$10,$10,$10,$10,$10,$10,$10,$00, // 8 x %10000 = |
$14,$14,$14,$14,$14,$14,$14,$00, // 8 x %10100 = ||
$15,$15,$15,$15,$15,$15,$15,$00) // 8 x %10101 = |||
// output byte pRepValue times...
NoInline Sub Rep(pValue, pRepValue As Byte)
Dim Index As Byte
Index = 0
While Index < pRepValue
I2CLCD.Write(pValue)
Inc(Index)
Wend
End Sub
// display the bar...
NoInline Sub Bargraph(pLine, pBarValue As Byte)
Const BASE_BAR = 0 // ASCII value of 0 bar (blank)
Const FULL_BAR = 3 // ASCII value of ||| bar
Const BAR_WIDTH = 16 // Max width in characters of bar
Const MAX_BAR_COUNT = BAR_WIDTH * 3 // Max bar counts
Dim NumberOfBars As Byte = pBarValue / 3
Dim Balance As Byte = pBarValue Mod 3
I2CLCD.MoveCursor(pLine,1)
Rep(FULL_BAR,NumberOfBars)
I2CLCD.Write(Balance)
Rep(BASE_BAR,BAR_WIDTH - (NumberOfBars + Min(Balance,1)))
End Sub
// loop index
Dim Index As Byte
// starting point of prog...
I2CLCD.Write(CGRAM)
DelayMS(2000)
// display the bar
While true
For Index = 0 To 48
Bargraph(1,Index)
Bargraph(2,48 - Index)
DelayMS(UpdateMS)
Next
For Index = 48 To 0 Step -1
Bargraph(1,Index)
Bargraph(2,48 - Index)
DelayMS(UpdateMS)
Next
Wend
Added lines 17-42:
!!! Sample Code (Software SI2C)
=code [=
' Using software I2C to control the I2CLCD display.
Device = 18F2550
Clock = 20
// optional configure SDA and SCL if using software I2C...
#option USE_SI2C = true
#option I2C_SDA = PORTA.4
#option I2C_SCL = PORTA.5
// import libraries...
Include "I2CLCD.bas"
' write string to display at locations...
I2CLCD.WriteAt(1,2,"Swordfish")
I2CLCD.WriteAt(2,4,"I2C LCD")
I2CLCD.WriteAt(3,6,"Library")
I2CLCD.WriteAt(4,8,"by Bitfogav.")
=]
Changed line 18 from:
to:
=code [=
Changed line 306 from:
to:
=]
Changed lines 16-306 from:
to:
The PCF8574/74A provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)) @ 100kHz. The system master can read from the input port or write to the output port through a single register.
[code]
{
*****************************************************************************
* Name : I2CLCD.BAS *
* Author : Gavin Wiggett (Bitfogav) *
* Notice : Copyright (c) 2020 *
* : All Rights Reserved *
* Date : 14/06/2020 *
* : *
* Version : 1.0 *
* Notes : I2CLCD.bas Lib for use with the PCF8574 controlled LCD. *
* : It will work with I2C Hardward or Software Libraries. *
* : just include the optonal settings in your main prog. *
* : *
* : Works with 2line and 4line LCD. *
* : *
* : Note: Lib doesn't support reading the PCF8574 or LCD busy flag.*
* : (this maybe added in a future update). *
*****************************************************************************
}
Module I2CLCD
// default module options for software I2C if used - user options can override these values...
#option USE_SI2C = false
#option I2C_SDA = PORTB.2
#option I2C_SCL = PORTB.3
// Use hardware or software I2C, (default is hardware I2C)...
#if IsOption (USE_SI2C) And Not (USE_SI2C in (true, false))
#error USE_SI2C, "Invalid Option, USE_SI2C must be true or false"
#endIf
// SCL option for software I2C only...
#if IsOption(I2C_SCL) And Not IsValidPortPin(I2C_SCL)
#error I2C_SCL, "Invalid option. I2C clock must be a valid port pin."
#endif
// SDA option for software I2C only...
#if IsOption(I2C_SDA) And Not IsValidPortPin(I2C_SDA)
#error I2C_SDA, "Invalid option. I2C data line must be a valid port pin."
#endif
// By default, the module includes a call to I2C lcd Initialize() at startup.
// set this option false to exclude initializer... user MUST then call Initialize()
// you can then change the I2C address by calling Initialize() and adding your
// desired address for example I2CLCD.Initialize($20).
#option I2CLCD_INITIALIZE = true
#if Not(I2CLCD_INITIALIZE in (true, false))
#error I2CLCD_INITIALIZE, "Invalid option"
#endif
// Depending on the #option USE_SI2C setting, will select Hardware or Software I2C...
#if (_mssp > 0) And Not USE_SI2C
Include "I2C.bas"
#else
Include "SI2C.bas"
#endif
// public LCD control commands...
Public Const
cmdCGRAM = $40,
cmdDDRAM = $60,
cmdClear = $01,
cmdHome = $02,
cmdEntryMode = $04,
cmdUnderLineON = $0E,
cmdCursorOFF = $0C,
cmdCursorON = $0F,
cmdBackLightON = $08,
cmdBackLightOFF = $00,
cmdMoveCursorLeft = $10,
cmdMoveCursorRight = $14,
cmdDisplayON = $0C,
cmdDisplayOFF = $08,
cmdMoveLeft = $18,
cmdMoveRight = $1E
// Bring LCD controls into the module...
Private Dim
RS, // LCD register select pin.
I2C_Addrs As Byte, // I2C device address (default $4E).
I2CInitialize As Initialize // Bring Hardware or Software I2C into the module...
Private Dim
FPosX As Byte = 1, // local x, y coordinates.
FPosY As Byte = 1 // initialized as per compiler update 2.2.3.3.
// Bring LCD backlight into the module...
Private Dim
BackLight_State As Byte = cmdBackLightON
'****************************************************************************
'* Name : ExpanderWrite *
'* Purpose : Write data to PCF8574 I2C *
'****************************************************************************
Private Sub ExpanderWrite(pData As Byte)
Start()
WriteByte(I2C_Addrs)
WriteByte(pData Or BackLight_State)
Stop()
End Sub
'****************************************************************************
'* Name : SetData *
'* Purpose : Write 4 bit data (4 bit interface) *
'****************************************************************************
Private Sub SetData(pNibble As Byte)
pNibble = pNibble Or RS // Include RS Value To LSB OF Data
ExpanderWrite(pNibble Or $04)
ExpanderWrite(pNibble And $FB)
DelayUS(50)
End Sub
'****************************************************************************
'* Name : Command *
'* Purpose : Write command data to LCD (4 bit interface) *
'****************************************************************************
Public Sub Command(pCommand As Byte)
RS = 0
SetData(pCommand And $F0)
SetData((pCommand << 4) And $F0)
DelayUS(50)
End Sub
'****************************************************************************
'* Name : WriteItem (OVERLOAD) *
'* Purpose : Write a single byte to the LCD (4 bit interface) *
'****************************************************************************
Private Sub WriteItem(pData As Byte)
RS = 1
SetData(pData And $F0)
SetData((pData << 4) And $F0)
DelayUS(50)
End Sub
'****************************************************************************
'* Name : WriteItem (OVERLOAD) *
'* Purpose : Write a string to the LCD *
'****************************************************************************
Private Sub WriteItem(pText As String)
Dim TextPtr As POSTINC0
Dim Text As INDF0
FSR0 = AddressOf(pText)
While Text <> 0
WriteItem(TextPtr)
Wend
End Sub
'****************************************************************************
'* Name : WriteItem (OVERLOAD) *
'* Purpose : Initialise the CGRAM with constant data array. Eight *
'* : programmable characters are available (0..7). *
'****************************************************************************
Private Sub WriteItem(ByRefConst pBitmap() As Byte)
Dim Index As Byte
Command(cmdCGRAM)
For Index = 0 To Bound(pBitmap)
WriteItem(pBitmap(Index))
Next
Command(cmdDDRAM)
End Sub
'****************************************************************************
'* Name : Write (COMPOUND) *
'* Purpose : Calls one or more WriteItem() subroutines *
'****************************************************************************
Public Compound Sub Write(WriteItem)
'****************************************************************************
'* Name : MoveCursor *
'* Purpose : Move the cursor to line and column *
'****************************************************************************
Public Sub MoveCursor(pLine, pCol As Byte)
Dec(pCol)
Select pLine
Case 1 : Command($80 + pCol)
Case 2 : Command($C0 + pCol)
Case 3 : Command($94 + pCol)
Case 4 : Command($D4 + pCol)
EndSelect
End Sub
'****************************************************************************
'* Name : MoveTo (PRIVATE) *
'* Purpose : Moves cursor to module private x, y location *
'****************************************************************************
Private Inline Sub MoveTo()
MoveCursor(FPosY, FPosX)
End Sub
'****************************************************************************
'* Name : SetLocationX (PRIVATE) *
'* Purpose : Set cursor x *
'****************************************************************************
Private Inline Sub SetLocationX(pX As FPosX)
End Sub
'****************************************************************************
'* Name : SetLocationY (PRIVATE) *
'* Purpose : Set cursor y *
'****************************************************************************
Private Inline Sub SetLocationY(pY As FPosY)
End Sub
'****************************************************************************
'* Name : WriteAt (COMPOUND) *
'* Purpose : Calls one or more WriteItem() subroutines at location x, y *
'****************************************************************************
Public Compound Sub WriteAt(SetLocationY, SetLocationX, MoveTo, WriteItem)
'****************************************************************************
'* Name : Cls *
'* Purpose : Clear the LCD screen *
'****************************************************************************
Public Sub Cls()
Command($01)
DelayMS(30)
End Sub
'****************************************************************************
'* Name : Backlight *
'* Purpose : Set LCD backlight on/off *
'****************************************************************************
Public Sub Backlight(pSet As Boolean = true)
If pSet = true Then
BackLight_State = cmdBackLightON
Else
BackLight_State = cmdBackLightOFF
End If
ExpanderWrite($00)
End Sub
'****************************************************************************
'* Name : ShiftLeft *
'* Purpose : Shift the LCD display left *
'****************************************************************************
Public Sub ShiftLeft()
Command($18)
DelayUS(40)
End Sub
'****************************************************************************
'* Name : ShiftRight *
'* Purpose : Shift the LCD display right *
'****************************************************************************
Public Sub ShiftRight()
Command($1C)
DelayUS(40)
End Sub
'****************************************************************************
'* Name : Initialize (Public) *
'* Purpose : Initialize the LCD - Optional User can define i2c device addr *
'****************************************************************************
Public Sub Initialize(pAddr As Byte = $4E)
DelayMS(100) // wait for LCD to stabilise...
I2C_Addrs = pAddr
ExpanderWrite($00)
DelayMS(30)
Command($03)
DelayMS(5)
Command($03)
DelayMS(5)
Command($03)
DelayMS(5)
Command(cmdHome)
DelayMS(5)
Command($20 Or (2 << 2)) ' function set (4-bit interface, 2 lines, 5*7 Pixels)
DelayMS(50)
Command(cmdDisplayON)
DelayMS(50)
Command(cmdClear)
DelayMS(50)
Command(cmdEntryMode Or cmdHome)
DelayMS(50)
End Sub
// initialise the I2C module (HW or SW)...
I2CInitialize()
// initialise the I2CLCD module, you must disable the option above
// if you wish to use your own I2C address, see the option above...
#if I2CLCD_INITIALIZE
Initialize()
#endif
End Module
[/]
[code]
{
*****************************************************************************
* Name : I2CLCD.BAS *
* Author : Gavin Wiggett (Bitfogav) *
* Notice : Copyright (c) 2020 *
* : All Rights Reserved *
* Date : 14/06/2020 *
* : *
* Version : 1.0 *
* Notes : I2CLCD.bas Lib for use with the PCF8574 controlled LCD. *
* : It will work with I2C Hardward or Software Libraries. *
* : just include the optonal settings in your main prog. *
* : *
* : Works with 2line and 4line LCD. *
* : *
* : Note: Lib doesn't support reading the PCF8574 or LCD busy flag.*
* : (this maybe added in a future update). *
*****************************************************************************
}
Module I2CLCD
// default module options for software I2C if used - user options can override these values...
#option USE_SI2C = false
#option I2C_SDA = PORTB.2
#option I2C_SCL = PORTB.3
// Use hardware or software I2C, (default is hardware I2C)...
#if IsOption (USE_SI2C) And Not (USE_SI2C in (true, false))
#error USE_SI2C, "Invalid Option, USE_SI2C must be true or false"
#endIf
// SCL option for software I2C only...
#if IsOption(I2C_SCL) And Not IsValidPortPin(I2C_SCL)
#error I2C_SCL, "Invalid option. I2C clock must be a valid port pin."
#endif
// SDA option for software I2C only...
#if IsOption(I2C_SDA) And Not IsValidPortPin(I2C_SDA)
#error I2C_SDA, "Invalid option. I2C data line must be a valid port pin."
#endif
// By default, the module includes a call to I2C lcd Initialize() at startup.
// set this option false to exclude initializer... user MUST then call Initialize()
// you can then change the I2C address by calling Initialize() and adding your
// desired address for example I2CLCD.Initialize($20).
#option I2CLCD_INITIALIZE = true
#if Not(I2CLCD_INITIALIZE in (true, false))
#error I2CLCD_INITIALIZE, "Invalid option"
#endif
// Depending on the #option USE_SI2C setting, will select Hardware or Software I2C...
#if (_mssp > 0) And Not USE_SI2C
Include "I2C.bas"
#else
Include "SI2C.bas"
#endif
// public LCD control commands...
Public Const
cmdCGRAM = $40,
cmdDDRAM = $60,
cmdClear = $01,
cmdHome = $02,
cmdEntryMode = $04,
cmdUnderLineON = $0E,
cmdCursorOFF = $0C,
cmdCursorON = $0F,
cmdBackLightON = $08,
cmdBackLightOFF = $00,
cmdMoveCursorLeft = $10,
cmdMoveCursorRight = $14,
cmdDisplayON = $0C,
cmdDisplayOFF = $08,
cmdMoveLeft = $18,
cmdMoveRight = $1E
// Bring LCD controls into the module...
Private Dim
RS, // LCD register select pin.
I2C_Addrs As Byte, // I2C device address (default $4E).
I2CInitialize As Initialize // Bring Hardware or Software I2C into the module...
Private Dim
FPosX As Byte = 1, // local x, y coordinates.
FPosY As Byte = 1 // initialized as per compiler update 2.2.3.3.
// Bring LCD backlight into the module...
Private Dim
BackLight_State As Byte = cmdBackLightON
'****************************************************************************
'* Name : ExpanderWrite *
'* Purpose : Write data to PCF8574 I2C *
'****************************************************************************
Private Sub ExpanderWrite(pData As Byte)
Start()
WriteByte(I2C_Addrs)
WriteByte(pData Or BackLight_State)
Stop()
End Sub
'****************************************************************************
'* Name : SetData *
'* Purpose : Write 4 bit data (4 bit interface) *
'****************************************************************************
Private Sub SetData(pNibble As Byte)
pNibble = pNibble Or RS // Include RS Value To LSB OF Data
ExpanderWrite(pNibble Or $04)
ExpanderWrite(pNibble And $FB)
DelayUS(50)
End Sub
'****************************************************************************
'* Name : Command *
'* Purpose : Write command data to LCD (4 bit interface) *
'****************************************************************************
Public Sub Command(pCommand As Byte)
RS = 0
SetData(pCommand And $F0)
SetData((pCommand << 4) And $F0)
DelayUS(50)
End Sub
'****************************************************************************
'* Name : WriteItem (OVERLOAD) *
'* Purpose : Write a single byte to the LCD (4 bit interface) *
'****************************************************************************
Private Sub WriteItem(pData As Byte)
RS = 1
SetData(pData And $F0)
SetData((pData << 4) And $F0)
DelayUS(50)
End Sub
'****************************************************************************
'* Name : WriteItem (OVERLOAD) *
'* Purpose : Write a string to the LCD *
'****************************************************************************
Private Sub WriteItem(pText As String)
Dim TextPtr As POSTINC0
Dim Text As INDF0
FSR0 = AddressOf(pText)
While Text <> 0
WriteItem(TextPtr)
Wend
End Sub
'****************************************************************************
'* Name : WriteItem (OVERLOAD) *
'* Purpose : Initialise the CGRAM with constant data array. Eight *
'* : programmable characters are available (0..7). *
'****************************************************************************
Private Sub WriteItem(ByRefConst pBitmap() As Byte)
Dim Index As Byte
Command(cmdCGRAM)
For Index = 0 To Bound(pBitmap)
WriteItem(pBitmap(Index))
Next
Command(cmdDDRAM)
End Sub
'****************************************************************************
'* Name : Write (COMPOUND) *
'* Purpose : Calls one or more WriteItem() subroutines *
'****************************************************************************
Public Compound Sub Write(WriteItem)
'****************************************************************************
'* Name : MoveCursor *
'* Purpose : Move the cursor to line and column *
'****************************************************************************
Public Sub MoveCursor(pLine, pCol As Byte)
Dec(pCol)
Select pLine
Case 1 : Command($80 + pCol)
Case 2 : Command($C0 + pCol)
Case 3 : Command($94 + pCol)
Case 4 : Command($D4 + pCol)
EndSelect
End Sub
'****************************************************************************
'* Name : MoveTo (PRIVATE) *
'* Purpose : Moves cursor to module private x, y location *
'****************************************************************************
Private Inline Sub MoveTo()
MoveCursor(FPosY, FPosX)
End Sub
'****************************************************************************
'* Name : SetLocationX (PRIVATE) *
'* Purpose : Set cursor x *
'****************************************************************************
Private Inline Sub SetLocationX(pX As FPosX)
End Sub
'****************************************************************************
'* Name : SetLocationY (PRIVATE) *
'* Purpose : Set cursor y *
'****************************************************************************
Private Inline Sub SetLocationY(pY As FPosY)
End Sub
'****************************************************************************
'* Name : WriteAt (COMPOUND) *
'* Purpose : Calls one or more WriteItem() subroutines at location x, y *
'****************************************************************************
Public Compound Sub WriteAt(SetLocationY, SetLocationX, MoveTo, WriteItem)
'****************************************************************************
'* Name : Cls *
'* Purpose : Clear the LCD screen *
'****************************************************************************
Public Sub Cls()
Command($01)
DelayMS(30)
End Sub
'****************************************************************************
'* Name : Backlight *
'* Purpose : Set LCD backlight on/off *
'****************************************************************************
Public Sub Backlight(pSet As Boolean = true)
If pSet = true Then
BackLight_State = cmdBackLightON
Else
BackLight_State = cmdBackLightOFF
End If
ExpanderWrite($00)
End Sub
'****************************************************************************
'* Name : ShiftLeft *
'* Purpose : Shift the LCD display left *
'****************************************************************************
Public Sub ShiftLeft()
Command($18)
DelayUS(40)
End Sub
'****************************************************************************
'* Name : ShiftRight *
'* Purpose : Shift the LCD display right *
'****************************************************************************
Public Sub ShiftRight()
Command($1C)
DelayUS(40)
End Sub
'****************************************************************************
'* Name : Initialize (Public) *
'* Purpose : Initialize the LCD - Optional User can define i2c device addr *
'****************************************************************************
Public Sub Initialize(pAddr As Byte = $4E)
DelayMS(100) // wait for LCD to stabilise...
I2C_Addrs = pAddr
ExpanderWrite($00)
DelayMS(30)
Command($03)
DelayMS(5)
Command($03)
DelayMS(5)
Command($03)
DelayMS(5)
Command(cmdHome)
DelayMS(5)
Command($20 Or (2 << 2)) ' function set (4-bit interface, 2 lines, 5*7 Pixels)
DelayMS(50)
Command(cmdDisplayON)
DelayMS(50)
Command(cmdClear)
DelayMS(50)
Command(cmdEntryMode Or cmdHome)
DelayMS(50)
End Sub
// initialise the I2C module (HW or SW)...
I2CInitialize()
// initialise the I2CLCD module, you must disable the option above
// if you wish to use your own I2C address, see the option above...
#if I2CLCD_INITIALIZE
Initialize()
#endif
End Module
[/]
Changed lines 12-16 from:
With solder pads, A0 A1 A2 which if left as is will be 1 1 1 (pulled-up). You can solder any bit of them to make it 0 if needed to address more than LCD I2C expander board. The board has a power indicator as well as a voltage regulator and most importantly a header to connect your I2C 2-wires (SCL, SDA).
to:
With solder pads, A0 A1 A2 which if left as is will be 1 1 1 (pulled-up). You can solder any bit of them to make it 0 if needed to address more than LCD I2C expander board. The board has a power indicator as well as a voltage regulator and most importantly a header to connect your I2C 2-wires (SCL, SDA).
I2C IO Expander PCF8574
The PCF8574/74A provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)) @ 100kHz. The system master can read from the input port or write to the output port through a single register.
I2C IO Expander PCF8574
The PCF8574/74A provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)) @ 100kHz. The system master can read from the input port or write to the output port through a single register.
Changed lines 6-12 from:
This will also allow you if you wanted too, add up to 8 LCDs to your project and control them all using a single microcontroller and with only 2-wires.
to:
This will also allow you if you wanted too, add up to 8 LCDs to your project and control them all using a single microcontroller and with only 2-wires.
The module also allows you to use both 2 line or 4 line displays, with no configuration.
This module board is a breakout board for the I2C IO Expander chip PCF8574 designed for LCD interfacing via a 16-pin header. There is a jumper to whether turn on or off the LCD backlight. As well as a potentiometer to adjust the LCD screen contrast.
With solder pads, A0 A1 A2 which if left as is will be 1 1 1 (pulled-up). You can solder any bit of them to make it 0 if needed to address more than LCD I2C expander board. The board has a power indicator as well as a voltage regulator and most importantly a header to connect your I2C 2-wires (SCL, SDA).
The module also allows you to use both 2 line or 4 line displays, with no configuration.
This module board is a breakout board for the I2C IO Expander chip PCF8574 designed for LCD interfacing via a 16-pin header. There is a jumper to whether turn on or off the LCD backlight. As well as a potentiometer to adjust the LCD screen contrast.
With solder pads, A0 A1 A2 which if left as is will be 1 1 1 (pulled-up). You can solder any bit of them to make it 0 if needed to address more than LCD I2C expander board. The board has a power indicator as well as a voltage regulator and most importantly a header to connect your I2C 2-wires (SCL, SDA).
Changed lines 4-6 from:
I have worked the module to be as close as possible with the original LCD module
to:
I have worked the module to be as close as possible with the original LCD module for the HD44780 display.
This will also allow you if you wanted too, add up to 8 LCDs to your project and control them all using a single microcontroller and with only 2-wires.
This will also allow you if you wanted too, add up to 8 LCDs to your project and control them all using a single microcontroller and with only 2-wires.
Added lines 1-4:
This module allows you to use the I2C LCD Displays that are interfaced with the PCF8574.
The module will work with both the I2S hardware and SI2C software modules.
I have worked the module to be as close as possible with the original LCD module
The module will work with both the I2S hardware and SI2C software modules.
I have worked the module to be as close as possible with the original LCD module