Hi,
My problem is after configure uart dma rx transfer mode, i got every byte is zero in call back. my code is as below:
CyU3PReturnStatus_t
CyFxUartApplnInit (void)
{
CyU3PDmaChannelConfig_t dmaConfig;
CyU3PUartConfig_t uartConfig;
CyU3PReturnStatus_t apiRetStatus = CY_U3P_SUCCESS;
rst_cpld();
apiRetStatus = CyU3PUartInit ();
if (apiRetStatus != CY_U3P_SUCCESS)
{
CyFxAppErrorHandler(apiRetStatus);
}
CyU3PMemSet ((uint8_t *)&uartConfig, 0, sizeof(uartConfig));
uartConfig.baudRate = CY_U3P_UART_BAUDRATE_2M;
uartConfig.stopBit = CY_U3P_UART_ONE_STOP_BIT;
uartConfig.parity = CY_U3P_UART_NO_PARITY;
uartConfig.flowCtrl = CyFalse;
uartConfig.txEnable = CyTrue;
uartConfig.rxEnable = CyTrue;
uartConfig.isDma = CyTrue; /* DMA mode */
apiRetStatus = CyU3PUartSetConfig (&uartConfig, NULL);
if (apiRetStatus != CY_U3P_SUCCESS )
{
CyFxAppErrorHandler(apiRetStatus);
}
CyU3PMemSet ((uint8_t *)&dmaConfig, 0, sizeof(dmaConfig));
dmaConfig.size = 192;
dmaConfig.count = 4;
dmaConfig.prodSckId = CY_U3P_LPP_SOCKET_UART_PROD;
dmaConfig.consSckId = CY_U3P_CPU_SOCKET_CONS;
dmaConfig.dmaMode = CY_U3P_DMA_MODE_BYTE;
dmaConfig.notification = CY_U3P_DMA_CB_PROD_EVENT;
dmaConfig.cb = CyFxUacMicDmaCallback;
dmaConfig.prodHeader = 0;
dmaConfig.prodFooter = 0;
dmaConfig.consHeader = 0;
dmaConfig.prodAvailCount = 0;
apiRetStatus = CyU3PDmaChannelCreate (&glUartRXChHandle,
CY_U3P_DMA_TYPE_MANUAL_IN, &dmaConfig);
if (apiRetStatus != CY_U3P_SUCCESS)
{
CyFxAppErrorHandler(apiRetStatus);
return apiRetStatus;
}
apiRetStatus = CyU3PUartTxSetBlockXfer(0xFFFFFFFF);
if (apiRetStatus != CY_U3P_SUCCESS)
{
CyFxAppErrorHandler(apiRetStatus);
}
apiRetStatus = CyU3PUartRxSetBlockXfer(0xFFFFFFFF);
if (apiRetStatus != CY_U3P_SUCCESS)
{
CyFxAppErrorHandler(apiRetStatus);
}
apiRetStatus = CyU3PDmaChannelSetXfer (&glUartRXChHandle, 0);
if (apiRetStatus != CY_U3P_SUCCESS)
{
return apiRetStatus;
}
#if 0
/* Initialize the debug module. */
apiRetStatus = CyU3PDebugInit (CY_U3P_LPP_SOCKET_UART_CONS, 8);
if (apiRetStatus != CY_U3P_SUCCESS)
{
CyFxAppErrorHandler(apiRetStatus);
}
CyU3PDebugPreamble (CyFalse);
#endif
return apiRetStatus;
}
Callback code:
static void
CyFxUacMicDmaCallback(
CyU3PDmaChannel *chHandle, /* Handle to the DMA channel. */
CyU3PDmaCbType_t type, /* Callback type. */
CyU3PDmaCBInput_t *input) /* Callback status. */
{
if (type == CY_U3P_DMA_CB_PROD_EVENT && recording == CyTrue) {
nprintf("%d-> %x %x %x %x\r\n",
input->buffer_p.count,
input->buffer_p.buffer[52],
input->buffer_p.buffer[43],
input->buffer_p.buffer[74],
input->buffer_p.buffer[95]);
CyU3PEventSet(&glMicEvent, MIC_EVENT, CYU3P_EVENT_OR);
}
}
from the log (send back to pc via vcom port), data always be zero, length is correct
192-> 0 0 0 0
but from logic analyzer the data is not zero.
Is there anything wrong in configuration ? thanks.
