Hello
I tried slave SPI with DMA on MK64 FRDM K64E with the example from 9.4 DSPI Slave Driver
Kinetis SDK v.1.1 API Reference Manual
No data is transfered...
What is wrong?
Thank you
short g_dma_read[128];
short g_dma_write[128];
edma_state_t edmaState;
edma_user_config_t edmaUserConfig;
dspi_edma_slave_state_t dspiEdmaSlaveState;
dspi_edma_slave_user_config_t slaveEdmaUserConfig;
dspi_status_t result;
PORT_HAL_SetMuxMode(PORTD_BASE, 0, kPortMuxAlt2); // PTD0 SPI0_PCS0 CS slave, 1 CLK high 19 CLK low
PORT_HAL_SetMuxMode(PORTD_BASE, 1, kPortMuxAlt2); // PTD1 SPI0_SCK CLK slave with continious 15 MHz clock
PORT_HAL_SetMuxMode(PORTD_BASE, 2, kPortMuxAlt2); // PTD2 SPI0_SOUT
PORT_HAL_SetMuxMode(PORTD_BASE, 3, kPortMuxAlt2); // PTD3 SPI0_SIN
memset(&edmaUserConfig, 0, sizeof(edmaUserConfig));
edmaUserConfig.chnArbitration = kEDMAChnArbitrationRoundrobin;
EDMA_DRV_Init(&edmaState, &edmaUserConfig);
memset(&dspiEdmaSlaveState, 0, sizeof(dspiEdmaSlaveState));
memset(&slaveEdmaUserConfig, 0, sizeof(slaveEdmaUserConfig));
slaveEdmaUserConfig.dataConfig.clkPhase = kDspiClockPhase_FirstEdge;
slaveEdmaUserConfig.dataConfig.clkPolarity = kDspiClockPolarity_ActiveHigh;
slaveEdmaUserConfig.dataConfig.bitsPerFrame = 19;
slaveEdmaUserConfig.dummyPattern = 0;
DSPI_DRV_EdmaSlaveInit(0, &dspiEdmaSlaveState, &slaveEdmaUserConfig); // DSPI0
// g_dma_write, g_dma_read is previously filled with testpattern, to make sure to debug
// make SPI transfer
result = DSPI_DRV_EdmaSlaveTransfer(0, // SPI0
(const uint8_t *) g_dma_write,
(uint8_t *) g_dma_read,
100);
while(kStatus_DSPI_Success != DSPI_DRV_EdmaSlaveGetTransferStatus(0, NULL)) {
__asm(" NOP");
}
