Other Parts Discussed in Thread: MSP430F5259
I learned that MSP430F5529 has only three DMA(0-2) channels today. but under TI-RTOS, the SPI module library default uses DMA.
Now I had config two spis, one for the master and the other for the slave. when spiA1 and spiB1 both use DMA_CHANNEL_1(RX) and DMA_CHANNEL_1(TX). when I used the SPI_transfer() function to send and receive in the two TASK, I found that they were interfering with each other, resulting in data confusion. this issue I've described before. It's the link()
now I configure two spi to use different dma channels, but I only have three dma channels, at least one DMA channel is shared by two SPI, which does not consider ADC and other peripherals to use DMA. What can I do to avoid this problem? using semaphores? or spi not use DMA? Who can give some advice or examples? Because I'm going to use 4 spi and 10 ADCs on MSP430F5259 next.
2.my spi config example