Search found 306 matches

by richardb
Tue Mar 19, 2024 8:14 am
Forum: User Modules
Topic: isrrx routine
Replies: 2
Views: 55

Re: isrrx routine

I have a work around now but I don't like it. I have 2 pcb's connected via rs485 if I check ISRRX.DataAvailable too often (1ms) i seem to get modifications to my input string where I collate and check the incoming packet. even though if i send the input byte to a debug output the bytes coming in are...
by richardb
Mon Mar 18, 2024 10:47 am
Forum: User Modules
Topic: isrrx routine
Replies: 2
Views: 55

isrrx routine

I'm having some really odd problems with receiving data over usart using the isrrx2 routine using a 47q43 part. I had a look in the library folder for interrupts and noticed there is a xvISRRX2.bas file should i be using this for the q43 series?. PS is there a prefered method of checking how much da...
by richardb
Fri Mar 01, 2024 1:26 pm
Forum: General
Topic: UMC Bootloader
Replies: 10
Views: 200

Re: UMC Bootloader

Thanks Gerry that works really well, although..... I spent much too long trying to diagnose a problem that didn't exist because I didn't realise i had to select the umc button on the mcloader and i doesnt really show that its selected. thanks again for your help on this i really appreciate it. Richard
by richardb
Thu Feb 29, 2024 2:31 pm
Forum: General
Topic: UMC Bootloader
Replies: 10
Views: 200

Re: UMC Bootloader

Thanks Gerry I'll have a look at this tomorrow
by richardb
Wed Feb 28, 2024 1:50 pm
Forum: General
Topic: UMC Bootloader
Replies: 10
Views: 200

Re: UMC Bootloader

Thanks Gerry,

I was expecting the pins to use portc.6-7 but the datasheet was unclear on the tx1 pin it just said it was remappable.

anyway portc.6-7 are fine for me.


Thanks
by richardb
Wed Feb 28, 2024 12:55 pm
Forum: General
Topic: UMC Bootloader
Replies: 10
Views: 200

Re: UMC Bootloader

Any luck with this Gerry?

I really don't want to hassle you as you are generously offering your time, but i have a breadboard on my desk ready to try it before i finish a board design, and i'm unsure what the default pins are likely to be.


Rich
by richardb
Mon Feb 26, 2024 7:52 am
Forum: General
Topic: UMC Bootloader
Replies: 10
Views: 200

Re: UMC Bootloader

Thanks Gerry
by richardb
Fri Feb 23, 2024 8:10 am
Forum: General
Topic: UMC Bootloader
Replies: 10
Views: 200

UMC Bootloader

Hi I thought i would start a fresh thread on this as it may be useful to others. start with the basics as I have no idea what I'm doing and it may help others. 1. I looked in the swordfish folder for the umcloader app, firstly is this the most up to date app or should I be looking for download? 2. w...
by richardb
Tue Jan 30, 2024 8:06 am
Forum: General
Topic: half bridge/full bridge pwm
Replies: 4
Views: 178

Re: half bridge/full bridge pwm

yeah you think the disable input would be ideal and i was using it, but....... there is an obscure Tb321 application note which suggests that you can get shoot-through faults. if you don't start with certain configurations. although i'm starting to think that only applies to the original part. there...
by richardb
Mon Jan 29, 2024 1:12 pm
Forum: General
Topic: half bridge/full bridge pwm
Replies: 4
Views: 178

half bridge/full bridge pwm

Hi 'm having small issue with A switching IC it's a hip4081a and there is an issue where is can blow itself up on start-up if its pins and brought up incorrectly. long story short... i need to either use the clc's to invert the pwm output onto a different pin and also set both to low on startup or e...
by richardb
Wed Dec 27, 2023 4:47 pm
Forum: User Modules
Topic: rs-485
Replies: 12
Views: 47620

Re: rs-485

Thanks David

I'll have a try at this when i have a board to try it on and some time.

Rich
by richardb
Thu Dec 21, 2023 7:18 am
Forum: User Modules
Topic: rs-485
Replies: 12
Views: 47620

Re: rs-485

Thanks Jerry, I'll look at getting some q43 parts and get them working in the current project. I'm feeling bad about not starting this as a new thread. is there a specific website dedicater to umc? do i need to add anything to the swordfsh code to "use"/skip over the bootloader? Thanks again Rich
by richardb
Tue Dec 19, 2023 7:20 am
Forum: User Modules
Topic: rs-485
Replies: 12
Views: 47620

Re: rs-485

Great I might try this next year :)

PS any suggestions for a bootloader for either of these parts for internal osc at 64MHz? for rs232...



Thanks again Jerry



Rich
by richardb
Wed Dec 13, 2023 1:02 pm
Forum: User Modules
Topic: rs-485
Replies: 12
Views: 47620

Re: rs-485

i will look t that part as i have a board that has an 18f26k22 and possibly looks pin compatible. unfortunately the main board that i wanted to add rs485 has an older 18f6723 which is 64 pins and i cant seem to find any q parts with that many pins. i have to say i find the microchip website just so ...
by richardb
Tue Dec 12, 2023 6:39 pm
Forum: User Modules
Topic: rs-485
Replies: 12
Views: 47620

Re: rs-485

Thanks Jerry

Good call on the Q series parts.

I think i'll put up with the delay for now but i will look to see if i can swap in a q series part at some stage.

Rich