This is a port of Stéphane Raimbault's Modbus library, libmodbus:
http://libmodbus.org/

The library has been modified so that it may be used as embedded software on
a microcontroller.

The port has been extensively tested on a Cypress CY8C3245 device.

Files:

main.c		- Top level application code.
dma_buffer.c/h	- DMA safe ping-pong buffer for interfacing with Cypress USB
modbus-local.h	- Per-application modbus constants - customise for each use
modbus-psoc.c	- Cypress PSoC specific code - port this to your uC architecture
modbus.c	- The modbus stack, based on libmodbus
modbus.c	- The modbus stack API
stdint.h	- Use this if your build environment doesnt provide uint8_t...