static int imxrt_getc(struct rt_serial_device *serial)
{
int ch;
struct imxrt_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct imxrt_uart *)serial->parent.user_data;
ch = -1;
if (LPUART_GetStatusFlags(uart->uart_base) & kLPUART_RxDataRegFullFlag)
ch = LPUART_ReadByte(uart->uart_base);
return ch;
}
static int mcux_lpuart_poll_in(struct device *dev, unsigned char *c)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u32_t flags = LPUART_GetStatusFlags(config->base);
int ret = -1;
if (flags & kLPUART_RxDataRegFullFlag) {
*c = LPUART_ReadByte(config->base);
ret = 0;
}
return ret;
}
static int mcux_lpuart_fifo_read(struct device *dev, u8_t *rx_data,
const int len)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u8_t num_rx = 0;
while ((len - num_rx > 0) &&
(LPUART_GetStatusFlags(config->base)
& kLPUART_RxDataRegFullFlag)) {
rx_data[num_rx++] = LPUART_ReadByte(config->base);
}
return num_rx;
}
void BOARD_CELL_UART_IRQ_HANDLER(void) {
if ((kLPUART_RxDataRegFullFlag) & LPUART_GetStatusFlags(BOARD_CELL_UART)) {
uint8_t data = LPUART_ReadByte(BOARD_CELL_UART);
// it may be necessary to create a critical section here, but
// right now it didn't hurt us to not disable interrupts
// __disable_irq();
/* If ring buffer is not full, add data to ring buffer. */
if (((gsmRxIndex + 1) % GSM_RINGBUFFER_SIZE) != gsmRxHead) {
gsmUartRingBuffer[gsmRxIndex++] = data;
gsmRxIndex %= GSM_RINGBUFFER_SIZE;
}
// __enable_irq();
}
}
void DEMO_LPUART_IRQHandler(void)
{
uint8_t data;
/* If new data arrived. */
if ((kLPUART_RxDataRegFullFlag)&LPUART_GetStatusFlags(DEMO_LPUART))
{
data = LPUART_ReadByte(DEMO_LPUART);
/* If ring buffer is not full, add data to ring buffer. */
if (((rxIndex + 1) % DEMO_RING_BUFFER_SIZE) != txIndex)
{
demoRingBuffer[rxIndex] = data;
rxIndex++;
rxIndex %= DEMO_RING_BUFFER_SIZE;
}
}
}
