microchip

Can someone suggest an open source implementation of a Modbus RTU Slave for a Microchip PIC18 processor? I'm looking for an implementation of Modbus RTU for RS-232/RS-485, but a Modbus TCP/IP implementation would be welcome as well. I've implemented a Modbus RTU (and ASCII) slave for PIC18 but using USB instead of RS232/485. It would be very easy to convert to RS232/485 though as the protocol code only requires character transmit and receive functions. I can help you with this if required. Take a look at my USB Modbus I/O page at http://www.fieldofcows.com/index.php?title=USB_Modbus_Interface

I was wondering if there is a way to load an external binary file as a variable in C through an include or a header file or something of the like. For example, in a project I am currently working on I am working with an embedded system that has a graphic display that will do text and minor graphics (boxes, lines, etc.) using ASCII data and commands. But, it will also display monochrome bitmaps. So I have a series of static displays that I use for a user interface, and a couple of bitmaps for splash screens. Now the reason I mention that it is an embedded system is that there is no file system

I googled and I see a suprising amount of flippant responses basically laughing at the asker for asking such a question. Microchip provides some source code for free (I don't want to post it here in case that's a no-no. Basically, google AN937, click the first link and there's a link for "source code" and its a zipped file). Its in ASM and when I look at it I start to go cross-eyed. I'd like to convert it to something resembling a c type language so that I can follow along. Because lines such as: GLOBAL _24_bit_sub movf BARGB2,w subwf AARGB2,f are probably very simple but they mean nothing to