wewe1sedfxfbgert er re
no vote
The first key step to implementing a software defined radio is to
interface with the digital-to-analog controller. A good amount of time
was spent working on this because the timing of the signals driving the
DAC had to be correct for the device to work properly. The Spartan3e
trainer board is has a LTC2624 DAC connected to the FPGA through the SPI
bus. The signals used to communicate with the DAC are SPI_MOSI, DAC_CS,
SPI_SCK, and DAC_CLR. The interface signals are described in the
following table.