Hello,
I am working as a hardware design engineer for the past years.
I read your detailed Requirements.
I have involved in lot of design activities consists of Xilinx Spartan and Artix seris and ALTRAN series FPGA, ATMEL micro controllers.
Having very good hands on experience in,
a) interfacing of Analog inputs using transformer and OP-AMP front end with ADC,
b) interfacing of DAC with control output
c) interfacing of digital communication interfaces such as, UART(RS232, RS422), SPI, I2C, ETHERNET and USB.
So I ensure that I could able to make an effective design for your requirements.
Consider this bid and let me know your feedback to start the work at earliest.