I'm having issues receiving data on LPUART 0. Send works fine. Is my configuration correct, or what else might be going wrong? (Note the rx function is called 1 byte at a time at first as I am reading xbee frames). I am expecting to read the data in TX (see capture below).
My set-up code.
void XBEE_UART_INIT_PERIPHERALS()
{
// Init power pin
GPIO_PinInit(XBEE_UART_POW_ENABLE, &xbee_power);
XBEE_SET_POWER_ON(false); // Start with power off.
// Init CTS and RTS
GPIO_PinInit(XBEE_UART_CTS, &xbee_cts);
GPIO_PinInit(XBEE_UART_RTS, &xbee_rts);
GPIO_PinWrite(XBEE_UART_CTS, false); // negative logic -- so false signals xbee that it is clear to send
// Init _RST and AWAKE
GPIO_PinInit(XBEE_UART_RESET, &xbee_reset_as_output);
GPIO_PinInit(XBEE_UART_AWAKE, &xbee_awake);
// Init LPUART
CLOCK_SetLpuart0Clock(1U);// Port A pin 1 DMA Interrupt
PORT_SetPinInterruptConfig(PORTA, 1, kPORT_DMAEitherEdge);LPUART_GetDefaultConfig(&config);
config.baudRate_Bps = XBEE_UART_BAUD_RATE;
config.enableTx = true;
config.enableRx = true;
LPUART_Init(XBEE_UART, &config, XBEE_UART_CLK_FREQ);DMAMUX_Init(XBEE_UART_DMAMUX_BASEADDR);
DMAMUX_SetSource(XBEE_UART_DMAMUX_BASEADDR, XBEE_UART_TX_DMA_CHANNEL, XBEE_UART_TX_DMA_REQUEST);
DMAMUX_EnableChannel(XBEE_UART_DMAMUX_BASEADDR, XBEE_UART_TX_DMA_CHANNEL);
DMAMUX_SetSource(XBEE_UART_DMAMUX_BASEADDR, XBEE_UART_RX_DMA_CHANNEL, XBEE_UART_RX_DMA_REQUEST);
DMAMUX_EnableChannel(XBEE_UART_DMAMUX_BASEADDR, XBEE_UART_RX_DMA_CHANNEL);DMA_Init(XBEE_UART_DMA_BASEADDR);
DMA_CreateHandle(&xbee_uart_TxDmaHandle, XBEE_UART_DMA_BASEADDR, XBEE_UART_TX_DMA_CHANNEL);
DMA_CreateHandle(&xbee_uart_RxDmaHandle, XBEE_UART_DMA_BASEADDR, XBEE_UART_RX_DMA_CHANNEL);LPUART_TransferCreateHandleDMA(XBEE_UART, &xbee_uart_handle, _xbee_lpuart_callback, NULL, &xbee_uart_TxDmaHandle,
&xbee_uart_RxDmaHandle);XBEE_SET_POWER_ON(true); // Turn Module On
// uint8_t temp[6] = {0};
// XBEE_UART_READ(temp, 6);
}
Callback Func
void _xbee_lpuart_callback(LPUART_Type *base, lpuart_dma_handle_t *handle, status_t status, void *userData)
{
printf("LPUART USER CALLBACK -- STATUS: %d \n", status);
userData = userData;
if (kStatus_LPUART_TxIdle == status)
{
printf("LPUART USER CALLBACK -- TX IDLE \n");
xbee_uart_txOnGoing = false;
}if (kStatus_LPUART_RxIdle == status)
{
printf("LPUART USER CALLBACK -- RX IDLE \n");
xbee_uart_rxOnGoing = false;
}
if (kStatus_LPUART_RxHardwareOverrun == status)
{
}
}
My TX and RX Functions
void XBEE_UART_WRITE(uint8_t *data, uint32_t length)
{
printf("LPUART SEND BEGIN \n");
xbee_uart_send_xfer.data = data;
xbee_uart_send_xfer.dataSize = length;
xbee_uart_txOnGoing = true;
LPUART_TransferSendDMA(XBEE_UART, &xbee_uart_handle, &xbee_uart_send_xfer);
/* Wait send finished */
while (xbee_uart_txOnGoing)
{
}printf("Done: ");
for(uint32_t x = 0; x < length; x++)
{
printf("-%X-", *(data+x));
}
printf("\n");
}
void XBEE_UART_READ(uint8_t *data, uint32_t length)
{
printf("LPUART RX BEGIN \n");
xbee_uart_receive_xfer.data = data;
xbee_uart_receive_xfer.dataSize = length;
xbee_uart_rxOnGoing = true;
LPUART_TransferReceiveDMA(XBEE_UART, &xbee_uart_handle, &xbee_uart_receive_xfer);
while (xbee_uart_rxOnGoing)
{
}printf("Done: ");
for(uint32_t x = 0; x < length; x++)
{
printf("-%X-", *(data+x));
}
printf("\n");
}
And console output:
_xbee_cmd_issue_list: next command ATHV
atcmd header is:
08 01 48 56 ..HV
LPUART SEND BEGIN
LPUART USER CALLBACK -- STATUS: 1302
LPUART USER CALLBACK -- TX IDLE
Done: -7E--0--4-
LPUART SEND BEGIN
LPUART USER CALLBACK -- STATUS: 1302
LPUART USER CALLBACK -- TX IDLE
Done: -8--1--48--56-
LPUART SEND BEGIN
LPUART USER CALLBACK -- STATUS: 1302
LPUART USER CALLBACK -- TX IDLE
Done: -58-
Waiting for driver to query the XBee device...
LPUART RX BEGIN
LPUART USER CALLBACK -- STATUS: 1303
LPUART USER CALLBACK -- RX IDLE
Done: -7E-
LPUART RX BEGIN
So I grab the first byte, then go to grab another and nothing happens (the transfer callback never occurs).
Thank you for your help!
