static int imxrt_putc(struct rt_serial_device *serial, char ch)
{
struct imxrt_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct imxrt_uart *)serial->parent.user_data;
LPUART_WriteByte(uart->uart_base, ch);
while (!(LPUART_GetStatusFlags(uart->uart_base) & kLPUART_TxDataRegEmptyFlag));
return 1;
}
static unsigned char mcux_lpuart_poll_out(struct device *dev, unsigned char c)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
while (!(LPUART_GetStatusFlags(config->base)
& kLPUART_TxDataRegEmptyFlag))
;
LPUART_WriteByte(config->base, c);
return c;
}
static int mcux_lpuart_fifo_fill(struct device *dev, const u8_t *tx_data,
int len)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u8_t num_tx = 0;
while ((len - num_tx > 0) &&
(LPUART_GetStatusFlags(config->base)
& kLPUART_TxDataRegEmptyFlag)) {
LPUART_WriteByte(config->base, tx_data[num_tx++]);
}
return num_tx;
}
/*!
* @brief Main function
*/
int main(void)
{
lpuart_config_t config;
BOARD_InitPins();
BOARD_BootClockRUN();
CLOCK_SetLpuart1Clock(1U);
/*
* config.baudRate_Bps = 115200U;
* config.parityMode = kLPUART_ParityDisabled;
* config.stopBitCount = kLPUART_OneStopBit;
* config.txFifoWatermark = 0;
* config.rxFifoWatermark = 0;
* config.enableTx = false;
* config.enableRx = false;
*/
LPUART_GetDefaultConfig(&config);
config.baudRate_Bps = BOARD_DEBUG_UART_BAUDRATE;
config.enableTx = true;
config.enableRx = true;
LPUART_Init(DEMO_LPUART, &config, CLOCK_GetFreq(DEMO_LPUART_CLKSRC));
/* Send g_tipString out. */
LPUART_WriteBlocking(DEMO_LPUART, g_tipString, sizeof(g_tipString) / sizeof(g_tipString[0]));
/* Enable RX interrupt. */
LPUART_EnableInterrupts(DEMO_LPUART, kLPUART_RxDataRegFullInterruptEnable);
EnableIRQ(DEMO_LPUART_IRQn);
while (1)
{
/* Send data only when LPUART TX register is empty and ring buffer has data to send out. */
while ((kLPUART_TxDataRegEmptyFlag & LPUART_GetStatusFlags(DEMO_LPUART)) && (rxIndex != txIndex))
{
LPUART_WriteByte(DEMO_LPUART, demoRingBuffer[txIndex]);
txIndex++;
txIndex %= DEMO_RING_BUFFER_SIZE;
}
}
}
void serial_putc(serial_t *obj, int c)
{
while (!serial_writable(obj));
LPUART_WriteByte(uart_addrs[obj->index], (uint8_t)c);
}
