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/*
Copyright (c) 2015 Arduino LLC. All right reserved.
Copyright (c) 2016 Sandeep Mistry All right reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "Uart.h"
#include "Arduino.h"
#include "wiring_private.h"
void serialEventRun(void)
{
if (serialEvent && Serial.available() ) serialEvent();
}
Uart::Uart(NRF_UART_Type *_nrfUart, IRQn_Type _IRQn, uint8_t _pinRX, uint8_t _pinTX)
{
nrfUart = _nrfUart;
IRQn = _IRQn;
uc_pinRX = g_ADigitalPinMap[_pinRX];
uc_pinTX = g_ADigitalPinMap[_pinTX];
uc_hwFlow = 0;
_mutex = NULL;
_begun = false;
}
Uart::Uart(NRF_UART_Type *_nrfUart, IRQn_Type _IRQn, uint8_t _pinRX, uint8_t _pinTX, uint8_t _pinCTS, uint8_t _pinRTS)
{
nrfUart = _nrfUart;
IRQn = _IRQn;
uc_pinRX = g_ADigitalPinMap[_pinRX];
uc_pinTX = g_ADigitalPinMap[_pinTX];
uc_pinCTS = g_ADigitalPinMap[_pinCTS];
uc_pinRTS = g_ADigitalPinMap[_pinRTS];
uc_hwFlow = 1;
_mutex = NULL;
_begun = false;
}
void Uart::setPins(uint8_t pin_rx, uint8_t pin_tx)
{
uc_pinRX = pin_rx;
uc_pinTX = pin_tx;
}
void Uart::begin(unsigned long baudrate)
{
begin(baudrate, (uint8_t)SERIAL_8N1);
}
void Uart::begin(unsigned long baudrate, uint16_t /*config*/)
{
// skip if already begun
if ( _begun ) return;
nrfUart->PSELTXD = uc_pinTX;
nrfUart->PSELRXD = uc_pinRX;
if (uc_hwFlow == 1) {
nrfUart->PSELCTS = uc_pinCTS;
nrfUart->PSELRTS = uc_pinRTS;
nrfUart->CONFIG = (UART_CONFIG_PARITY_Excluded << UART_CONFIG_PARITY_Pos) | UART_CONFIG_HWFC_Enabled;
} else {
nrfUart->CONFIG = (UART_CONFIG_PARITY_Excluded << UART_CONFIG_PARITY_Pos) | UART_CONFIG_HWFC_Disabled;
}
uint32_t nrfBaudRate;
if (baudrate <= 1200) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud1200;
} else if (baudrate <= 2400) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud2400;
} else if (baudrate <= 4800) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud4800;
} else if (baudrate <= 9600) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud9600;
} else if (baudrate <= 14400) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud14400;
} else if (baudrate <= 19200) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud19200;
} else if (baudrate <= 28800) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud28800;
} else if (baudrate <= 38400) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud38400;
} else if (baudrate <= 57600) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud57600;
} else if (baudrate <= 76800) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud76800;
} else if (baudrate <= 115200) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud115200;
} else if (baudrate <= 230400) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud230400;
} else if (baudrate <= 250000) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud250000;
} else if (baudrate <= 460800) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud460800;
} else if (baudrate <= 921600) {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud921600;
} else {
nrfBaudRate = UARTE_BAUDRATE_BAUDRATE_Baud1M;
}
nrfUart->BAUDRATE = nrfBaudRate;
nrfUart->ENABLE = UART_ENABLE_ENABLE_Enabled;
nrfUart->EVENTS_RXDRDY = 0x0UL;
nrfUart->EVENTS_TXDRDY = 0x0UL;
nrfUart->TASKS_STARTRX = 0x1UL;
nrfUart->TASKS_STARTTX = 0x1UL;
nrfUart->INTENSET = UART_INTENSET_RXDRDY_Msk;
NVIC_ClearPendingIRQ(IRQn);
NVIC_SetPriority(IRQn, 3);
NVIC_EnableIRQ(IRQn);
_mutex = xSemaphoreCreateMutex();
_begun = true;
}
void Uart::end()
{
NVIC_DisableIRQ(IRQn);
nrfUart->INTENCLR = UART_INTENCLR_RXDRDY_Msk;
nrfUart->TASKS_STOPRX = 0x1UL;
nrfUart->TASKS_STOPTX = 0x1UL;
nrfUart->ENABLE = UART_ENABLE_ENABLE_Disabled;
nrfUart->PSELTXD = 0xFFFFFFFF;
nrfUart->PSELRXD = 0xFFFFFFFF;
nrfUart->PSELRTS = 0xFFFFFFFF;
nrfUart->PSELCTS = 0xFFFFFFFF;
rxBuffer.clear();
vSemaphoreDelete(_mutex);
_mutex = NULL;
_begun = false;
}
void Uart::flush()
{
rxBuffer.clear();
}
void Uart::IrqHandler()
{
if (nrfUart->EVENTS_RXDRDY)
{
nrfUart->EVENTS_RXDRDY = 0x0UL;
rxBuffer.store_char(nrfUart->RXD);
}
}
int Uart::available()
{
return rxBuffer.available();
}
int Uart::peek()
{
return rxBuffer.peek();
}
int Uart::read()
{
return rxBuffer.read_char();
}
size_t Uart::write(const uint8_t data)
{
xSemaphoreTake(_mutex, portMAX_DELAY);
nrfUart->TXD = data;
while(!nrfUart->EVENTS_TXDRDY);
nrfUart->EVENTS_TXDRDY = 0x0UL;
xSemaphoreGive(_mutex);
return 1;
}
Uart SERIAL_PORT_HARDWARE( NRF_UART0, UARTE0_UART0_IRQn, PIN_SERIAL_RX, PIN_SERIAL_TX );
#ifdef HAVE_HWSERIAL2
// TODO UART1 is UARTE only, need update class Uart to work
Uart Serial2( NRF_UARTE1, UARTE1_IRQn, PIN_SERIAL2_RX, PIN_SERIAL2_TX );
#endif
extern "C"
{
void UARTE0_UART0_IRQHandler()
{
SERIAL_PORT_HARDWARE.IrqHandler();
}
}
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