Objective:
To obtain simultaneous data from two ADCs within ADS7863 ADC to two SPI buses on OMAP.
Architecture:
SDOa and SDOb – Two SPI outputs from ADS7863.
SPI1, SPI2 two SPI devices on OMAPL137.
The two SPI buses are connected as:
ADS7863 OMAPL137
SPOa SPI1 MISO.
SPOb SPI2 MISO
SDI SPI1 SIMO
CLK SPI 1 CLK
NC SP1 SIMO
NC SPI1 CLK
We need two DMA engines (or one) to get simultaneous sampled data from SDOa and SDOb lines connected to SPI1 and SPI2.
If this is not the right procedure to obtain simultaneous data from ADS7863 please give us suggestions on how to do this.