i bought theC5515Ezdsp USBStick development board, well the AIC3204 codec on the board has the hightest sampling rate up to 192KHz, and it's not enough for me. so i want to expand with ADC and DAC chips, and i found most of ADC and DAC supports SPI and I2C interface. althought there is a SPI interface in C5515, it doesn't support DMA, and i found that the DMA supports all the four I2S interfaces, then i wonder if i can use the I2S interface to connect the ADC chip with SPI interface(like ADS8318) directly ? in this way, i can still use the DMA to carry data from I2S receive buffer to the inner memory, this will release the burden of CPU. anyone can give me some tips that is this available ?
thanks in advance
