void initFLEXIO_UART(void)
{
flexio_uart_config_t config;
// ********************************************************
// config.enableUart = true;
// config.enableInDoze = false;
// config.enableInDebug = true;
// config.enableFastAccess = false;
// config.baudRate_Bps = 115200U;
// config.bitCountPerChar = kFLEXIO_UART_8BitsPerChar;
// ********************************************************
FLEXIO_UART_GetDefaultConfig(&config);
config.baudRate_Bps = BOARD_DEBUG_UART_BAUDRATE;
config.enableUart = true;
uartDev.flexioBase = BOARD_FLEXIO_BASE;
uartDev.TxPinIndex = FLEXIO_UART_TX_PIN;
uartDev.RxPinIndex = FLEXIO_UART_RX_PIN;
uartDev.shifterIndex[0] = 2U;
uartDev.shifterIndex[1] = 3U;
uartDev.timerIndex[0] = 2U;
uartDev.timerIndex[1] = 3U;
/*
uartDev.shifterIndex[0] = 0U;
uartDev.shifterIndex[1] = 1U;
uartDev.timerIndex[0] = 0U;
uartDev.timerIndex[1] = 1U;
*/
FLEXIO_UART_Init(&uartDev, &config, FLEXIO_CLOCK_FREQUENCY);
FLEXIO_UART_TransferCreateHandle(&uartDev, &g_uartHandle, FLEXIO_UART_UserCallback, NULL);
}
/*!
* @brief Main function
*/
int main(void)
{
flexio_uart_config_t config;
flexio_uart_transfer_t xfer;
flexio_uart_transfer_t sendXfer;
flexio_uart_transfer_t receiveXfer;
size_t receivedBytes;
uint32_t i;
BOARD_InitPins();
BOARD_BootClockRUN();
CLOCK_SetFlexio0Clock(1U);
/*
* config.enableUart = true;
* config.enableInDoze = false;
* config.enableInDebug = true;
* config.enableFastAccess = false;
* config.baudRate_Bps = 115200U;
* config.bitCountPerChar = kFLEXIO_UART_8BitsPerChar;
*/
FLEXIO_UART_GetDefaultConfig(&config);
config.baudRate_Bps = BOARD_DEBUG_UART_BAUDRATE;
config.enableUart = true;
uartDev.flexioBase = BOARD_FLEXIO_BASE;
uartDev.TxPinIndex = FLEXIO_UART_TX_PIN;
uartDev.RxPinIndex = FLEXIO_UART_RX_PIN;
uartDev.shifterIndex[0] = 0U;
uartDev.shifterIndex[1] = 1U;
uartDev.timerIndex[0] = 0U;
uartDev.timerIndex[1] = 1U;
FLEXIO_UART_Init(&uartDev, &config, FLEXIO_CLOCK_FREQUENCY);
FLEXIO_UART_TransferCreateHandle(&uartDev, &g_uartHandle, FLEXIO_UART_UserCallback, NULL);
FLEXIO_UART_TransferStartRingBuffer(&uartDev, &g_uartHandle, g_rxRingBuffer, RX_RING_BUFFER_SIZE);
/* Send g_tipString out. */
xfer.data = g_tipString;
xfer.dataSize = sizeof(g_tipString) - 1;
txOnGoing = true;
FLEXIO_UART_TransferSendNonBlocking(&uartDev, &g_uartHandle, &xfer);
/* Wait send finished */
while (txOnGoing)
{
}
/* Start to echo. */
sendXfer.data = g_txBuffer;
sendXfer.dataSize = ECHO_BUFFER_SIZE;
receiveXfer.data = g_rxBuffer;
receiveXfer.dataSize = ECHO_BUFFER_SIZE;
while (1)
{
/* If g_txBuffer is empty and g_rxBuffer is full, copy g_rxBuffer to g_txBuffer. */
if ((!rxBufferEmpty) && (!txBufferFull))
{
memcpy(g_txBuffer, g_rxBuffer, ECHO_BUFFER_SIZE);
rxBufferEmpty = true;
txBufferFull = true;
}
/* If RX is idle and g_rxBuffer is empty, start to read data to g_rxBuffer. */
if ((!rxOnGoing) && rxBufferEmpty)
{
rxOnGoing = true;
FLEXIO_UART_TransferReceiveNonBlocking(&uartDev, &g_uartHandle, &receiveXfer, &receivedBytes);
if (ECHO_BUFFER_SIZE == receivedBytes)
{
rxBufferEmpty = false;
rxOnGoing = false;
}
}
/* If TX is idle and g_txBuffer is full, start to send data. */
if ((!txOnGoing) && txBufferFull)
{
txOnGoing = true;
FLEXIO_UART_TransferSendNonBlocking(&uartDev, &g_uartHandle, &sendXfer);
}
/* Delay some time, simulate the app is processing other things, input data save to ring buffer. */
i = 0x10U;
while (i--)
{
__NOP();
}
}
}
