void USB_UartCreateHandle(USB_UartType *base,
usb_uart_handle_t *handle,
usb_uart_rx_callback_t callback,
void *userData)
{
UART_TransferCreateHandle(base, (uart_handle_t *)handle, callback, userData);
}
void gps_task(void *pArg)
{
char rx_sentence[200];
char *data_ptr;
uint32_t len;
uint32_t notificationValue;
PRINTF("from gps task...\r\n");
/* Use Task Notification to sychronize between UART Rx handler and GPS task */
xGpsTaskHandle = xTaskGetCurrentTaskHandle();
/* Initialize UART driver with given parameters */
UART_Init(GPS_UART_BASE, &gps_uart_config, GPS_UART_SRCCLK);
/* Initialize UART driver and install our own handler for UART Rx data, which is called by the ISR */
UART_TransferCreateHandle(GPS_UART_BASE, &gps_uart_handle, gps_uart_rx_handler, NULL);
/* Set receive buffer pointer explicitly for custom handling */
gps_uart_handle.rxData = gps_rx_buf;
gps_uart_handle.rxDataSize = 1;
/* Enable RX interrupt (start reception of bytes from GPS module) */
UART_EnableInterrupts(GPS_UART_BASE, kUART_RxDataRegFullInterruptEnable | kUART_RxOverrunInterruptEnable);
/* Turn on RED LED */
while (1) {
/* Wait for notification from UART Rx handler */
if((notificationValue = ulTaskNotifyTake(pdTRUE, portMAX_DELAY)) == 1) {
/* Copy the received sentence */
len = gps_rx_len;
memcpy((void *) rx_sentence, (void *) gps_rx_sentence, len);
/* Parse the received sentence to update gps_info structure */
if (NULL != strstr(rx_sentence, "GPGGA")) {
data_ptr = &rx_sentence[6];
gps_parse_gga(data_ptr, &gps_info);
}
if ((NULL != strstr(rx_sentence, "GPRMC")) || (NULL != strstr(rx_sentence, "GNRMC"))) {
data_ptr = &rx_sentence[6];
gps_parse_rmc(data_ptr, &gps_info);
}
}
/* Check for GPS Fix */
if (NO_FIX != gps_info.fix) {
/* Turn on GREEN LED */
LED_GREEN_ON();
}
else {
/* Turn off GREEN LED */
LED_GREEN_OFF();
}
}
}
