void UART0_Stop()
{
if (UART0_State == UART0_State_NotStarted)
return;
// Wait for any outstanding data to be sent
Serial.flush();
NRF_UART0->TASKS_STOPTX = 1;
NRF_UART0->TASKS_STOPRX = 1;
NRF_UART0->ENABLE = (UART_ENABLE_ENABLE_Disabled << UART_ENABLE_ENABLE_Pos);
// Disable UART interrupt in NVIC
detachInterrupt(UART0_IRQn);
// Disconnect high drive tx pin
int tx_pin = NRF_UART0->PSELTXD;
NRF_GPIO->PIN_CNF[tx_pin] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
| (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
| (GPIO_PIN_CNF_PULL_Pullup << GPIO_PIN_CNF_PULL_Pos)
| (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
| (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
UART0_State = UART0_State_NotStarted;
}
void UART0_FlushTX()
{
Serial.flush();
}