Hello,
I have a problem programming the Superspeed Explorer Kit.
I want to send 4 buffer of 200 Byte using spi. Sometimes happen that the clock 'pause' itself for ~20us and then restart whit the correct data.
I tried different frequencies, I disabled the CyU3PDebugPrint() function and I tried to build the project in Release mode but nothing changes.
I attach the code and also an oscilloscope screenshot whit the error.
CyFxSpiInit();
CyU3PSpiSetSsnLine(CyFalse);
CyU3PSpiTransmitWords(spi_cmd,1);
CyU3PSpiSetSsnLine(CyTrue);
CyU3PBusyWait(200);
CyU3PSpiSetSsnLine(CyFalse);
CyU3PSpiTransmitWords(mosi_buff_1,200);
CyU3PSpiSetSsnLine(CyTrue);
CyU3PBusyWait(200);
CyU3PSpiSetSsnLine(CyFalse);
CyU3PSpiTransmitWords(mosi_buff_2,200);
CyU3PSpiSetSsnLine(CyTrue);
CyU3PBusyWait(200);
CyU3PSpiSetSsnLine(CyFalse);
CyU3PSpiTransmitWords(mosi_buff_3,200);
CyU3PSpiSetSsnLine(CyTrue);
CyU3PBusyWait(200);
CyU3PSpiSetSsnLine(CyFalse);
CyU3PSpiTransmitWords(mosi_buff_4,200);
CyU3PSpiSetSsnLine(CyTrue);
Here the CyFxSpiInit() function:
CyU3PReturnStatus_t
CyFxSpiInit (void)
{
CyU3PSpiConfig_t spiConfig;
CyU3PReturnStatus_t status = CY_U3P_SUCCESS;
/* Start the SPI module and configure the master. */
status = CyU3PSpiInit();
if (status != CY_U3P_SUCCESS)
{
return status;
}
CyU3PMemSet ((uint8_t *)&spiConfig, 0, sizeof(spiConfig));
spiConfig.isLsbFirst = CyFalse;
spiConfig.cpol = CyFalse;//CyTrue;
spiConfig.cpha = CyFalse;//CyTrue;
spiConfig.ssnPol = CyFalse;
spiConfig.leadTime = CY_U3P_SPI_SSN_LAG_LEAD_ONE_HALF_CLK;
spiConfig.lagTime = CY_U3P_SPI_SSN_LAG_LEAD_ONE_HALF_CLK;
spiConfig.ssnCtrl = CY_U3P_SPI_SSN_CTRL_FW;
spiConfig.clock = 8000000 ;
spiConfig.wordLen = 8;
status = CyU3PSpiSetConfig (&spiConfig, NULL);
return status;
}
