Swordfish

Hi Leo, Yes, the character set is a bit strange on the MAX7456, but I got around this by using the 'GetCharCodeFromTable()' routine. The font files on the Arduino forum look like an easy way to get around the problem! On my system, I have defined some custom characters using the MCM and MDM utilitie...

Hi Leo, I got the ICs as samples directly from Maxim and soldered one down to a SMD-to-DIL adaptor and I then used a good old fashioned breadboard to do the prototyping as there really aren't very many connections to make. I've since made this into a more permanent design using stripboard and I may ...

Hi Octal, Ok - I'm really not trying to start an argument with you, and I think we may be misinterpreting each others responses :oops: . I completely agree with what you're saying that on-chip RAM is accessed one way, and off-chip SRAM is accessed by table writes and table reads. They are different,...

Hi RocketBob, It doesn't matter to the PIC whether the external memory is FLASH or SRAM contrary to what has been mentioned above: user has to know, for example, that he still cant use it as normal ram I've done this loads of times using the MCC18 compiler and it works perfectly. However, I still ha...

I've been playing around with the MAX7456 OSD video IC in a project to overlay GPS data onto a video stream, and I'd like to share the beta code with other users. With a bit of refinement maybe this could be made into a fully functional module? So far it allows you to write strings of text to any po...

The same is true for the 18F8722... this code fixed it though.

Thanks Jerry.

I'm not sure how it would be possible to cause an interrupt on a specific ADC value. However, if you want to trigger an interrupt at a specific analogue voltage level then some PICs have a built in comparator that would do the job. Failing that, an external window comparator with the output fed into...

Hi Octal, Thanks for your reply - I guess it makes sense that Swordfish doesn't handle this scenario since it's not a particularly common thing to need to do (even amongst users of other PIC compilers). It's a bit of a shame though... :cry: However, what really appeals to me about Swordfish so far (...

Hi Steve, I've used extended mode for a couple of projects now - basically you just sacrifice a bunch of IO pins and you get a multiplexed data and address bus. It's then fairly trivial to hang external RAM or FLASH from these, or just to memory map the entire project. I use this feature on an 18F87...

Ok, I've made a little progress, but it's not ideal. I can declare the variable as an absolute, ie: dim XRamVar as byte absolute $80000 which seems to work from examination of the LST file. However, what I'd ideally like to do would be to specify a starting address to put the following variables, li...

Hi, I'm on the brink of ordering the Swordfish compiler for a project I'm working on but I've got a quick question first: Does Swordfish allow you to access external RAM connected to an 18F8722 in extended microcontroller mode? I have a general purpose board made up with an extra 256K of RAM which I...