arduino-esp32/cores/esp32/HardwareSerial.cpp
lbernstone 81b7c47203
Serial::end hang (#5047)
workaround for #5043. There is a timing issue with HardwareSerial::end. I'm not sure what is hung, but it should be possible to see this in jtag, as it does cause a reboot if you let it. The delay needs to be before you detach the device!?
2021-04-15 12:46:53 +03:00

222 lines
4.4 KiB
C++

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include "pins_arduino.h"
#include "HardwareSerial.h"
#if CONFIG_IDF_TARGET_ESP32
#ifndef RX1
#define RX1 9
#endif
#ifndef TX1
#define TX1 10
#endif
#ifndef RX2
#define RX2 16
#endif
#ifndef TX2
#define TX2 17
#endif
#else
#ifndef RX1
#define RX1 18
#endif
#ifndef TX1
#define TX1 17
#endif
#endif
#if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SERIAL)
#if ARDUINO_SERIAL_PORT //Serial used for USB CDC
HardwareSerial Serial0(0);
#else
HardwareSerial Serial(0);
#endif
HardwareSerial Serial1(1);
#if CONFIG_IDF_TARGET_ESP32
HardwareSerial Serial2(2);
#endif
#endif
HardwareSerial::HardwareSerial(int uart_nr) : _uart_nr(uart_nr), _uart(NULL) {}
void HardwareSerial::begin(unsigned long baud, uint32_t config, int8_t rxPin, int8_t txPin, bool invert, unsigned long timeout_ms, uint8_t rxfifo_full_thrhd)
{
if(0 > _uart_nr || _uart_nr > 2) {
log_e("Serial number is invalid, please use 0, 1 or 2");
return;
}
if(_uart) {
end();
}
if(_uart_nr == 0 && rxPin < 0 && txPin < 0) {
#if CONFIG_IDF_TARGET_ESP32
rxPin = 3;
txPin = 1;
#elif CONFIG_IDF_TARGET_ESP32S2
rxPin = 44;
txPin = 43;
#elif CONFIG_IDF_TARGET_ESP32C3
rxPin = 20;
txPin = 21;
#endif
}
if(_uart_nr == 1 && rxPin < 0 && txPin < 0) {
rxPin = RX1;
txPin = TX1;
}
#if CONFIG_IDF_TARGET_ESP32
if(_uart_nr == 2 && rxPin < 0 && txPin < 0) {
rxPin = RX2;
txPin = TX2;
}
#endif
_uart = uartBegin(_uart_nr, baud ? baud : 9600, config, rxPin, txPin, 256, invert, rxfifo_full_thrhd);
_tx_pin = txPin;
_rx_pin = rxPin;
if(!baud) {
uartStartDetectBaudrate(_uart);
time_t startMillis = millis();
unsigned long detectedBaudRate = 0;
while(millis() - startMillis < timeout_ms && !(detectedBaudRate = uartDetectBaudrate(_uart))) {
yield();
}
end();
if(detectedBaudRate) {
delay(100); // Give some time...
_uart = uartBegin(_uart_nr, detectedBaudRate, config, rxPin, txPin, 256, invert, rxfifo_full_thrhd);
} else {
log_e("Could not detect baudrate. Serial data at the port must be present within the timeout for detection to be possible");
_uart = NULL;
_tx_pin = 255;
_rx_pin = 255;
}
}
}
void HardwareSerial::updateBaudRate(unsigned long baud)
{
uartSetBaudRate(_uart, baud);
}
void HardwareSerial::end()
{
if(uartGetDebug() == _uart_nr) {
uartSetDebug(0);
}
delay(10);
log_v("pins %d %d",_tx_pin, _rx_pin);
uartEnd(_uart, _tx_pin, _rx_pin);
_uart = 0;
}
size_t HardwareSerial::setRxBufferSize(size_t new_size) {
return uartResizeRxBuffer(_uart, new_size);
}
void HardwareSerial::setDebugOutput(bool en)
{
if(_uart == 0) {
return;
}
if(en) {
uartSetDebug(_uart);
} else {
if(uartGetDebug() == _uart_nr) {
uartSetDebug(NULL);
}
}
}
int HardwareSerial::available(void)
{
return uartAvailable(_uart);
}
int HardwareSerial::availableForWrite(void)
{
return uartAvailableForWrite(_uart);
}
int HardwareSerial::peek(void)
{
if (available()) {
return uartPeek(_uart);
}
return -1;
}
int HardwareSerial::read(void)
{
if(available()) {
return uartRead(_uart);
}
return -1;
}
// read characters into buffer
// terminates if size characters have been read, or no further are pending
// returns the number of characters placed in the buffer
// the buffer is NOT null terminated.
size_t HardwareSerial::read(uint8_t *buffer, size_t size)
{
size_t avail = available();
if (size < avail) {
avail = size;
}
size_t count = 0;
while(count < avail) {
*buffer++ = uartRead(_uart);
count++;
}
return count;
}
void HardwareSerial::flush(void)
{
uartFlush(_uart);
}
void HardwareSerial::flush(bool txOnly)
{
uartFlushTxOnly(_uart, txOnly);
}
size_t HardwareSerial::write(uint8_t c)
{
uartWrite(_uart, c);
return 1;
}
size_t HardwareSerial::write(const uint8_t *buffer, size_t size)
{
uartWriteBuf(_uart, buffer, size);
return size;
}
uint32_t HardwareSerial::baudRate()
{
return uartGetBaudRate(_uart);
}
HardwareSerial::operator bool() const
{
return true;
}
void HardwareSerial::setRxInvert(bool invert)
{
uartSetRxInvert(_uart, invert);
}