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arduino-esp32/cores/esp32/HardwareSerial.cpp
Martino Facchin 9b4622dc40
Add Arduino Nano ESP32 target (#8417) 
* USB: enable DFU interface and stub

* nano_nora: add Arduino Nano ESP32 board support

* [pin_remap 1/3] platform: define ARDUINO_CORE_BUILD when building core files

* [pin_remap 2/3] core,libs: add pin remap hooks

* [pin_remap 3/3] nano_nora: implement and enable pin remap

* nano_nora: fix: reset all matrix connections at boot

* nano_nora: add recovery image for release/v2.x

* nano_nora: use official Arduino branding

* nano_nora: core split + recovery mode rework

Use an absolute address in SPIRAM to store the magic tokens, almost at the
end of the memory, to avoid the markers from being overwritten on any kind
of sketch and core combination.

Also, only start the recovery once if a valid binary is present in the
Flash, by immediately setting that for the next boot when recovery
starts.

* platform: fix: use {compiler.sdk.path} for sdk path

In preparation for the sdk -> tool transition

* package_index: remove dfu-util from template

The tool is already available in mainline package_index.json

* on_release: allow single board packages

---------

Co-authored-by: Luca Burelli <l.burelli@arduino.cc>
2023-07-17 13:33:05 +03:00

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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include "pins_arduino.h"
#include "io_pin_remap.h"
#include "HardwareSerial.h"
#include "soc/soc_caps.h"
#include "driver/uart.h"
#include "freertos/queue.h"
#ifndef ARDUINO_SERIAL_EVENT_TASK_STACK_SIZE
#define ARDUINO_SERIAL_EVENT_TASK_STACK_SIZE 2048
#endif
#ifndef ARDUINO_SERIAL_EVENT_TASK_PRIORITY
#define ARDUINO_SERIAL_EVENT_TASK_PRIORITY (configMAX_PRIORITIES-1)
#endif
#ifndef ARDUINO_SERIAL_EVENT_TASK_RUNNING_CORE
#define ARDUINO_SERIAL_EVENT_TASK_RUNNING_CORE -1
#endif
#ifndef SOC_RX0
#if CONFIG_IDF_TARGET_ESP32
#define SOC_RX0 3
#elif CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32S3
#define SOC_RX0 44
#elif CONFIG_IDF_TARGET_ESP32C3
#define SOC_RX0 20
#endif
#endif
#ifndef SOC_TX0
#if CONFIG_IDF_TARGET_ESP32
#define SOC_TX0 1
#elif CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32S3
#define SOC_TX0 43
#elif CONFIG_IDF_TARGET_ESP32C3
#define SOC_TX0 21
#endif
#endif
void serialEvent(void) __attribute__((weak));
void serialEvent(void) {}
#if SOC_UART_NUM > 1
#ifndef RX1
#if CONFIG_IDF_TARGET_ESP32
#define RX1 9
#elif CONFIG_IDF_TARGET_ESP32S2
#define RX1 18
#elif CONFIG_IDF_TARGET_ESP32C3
#define RX1 18
#elif CONFIG_IDF_TARGET_ESP32S3
#define RX1 15
#endif
#endif
#ifndef TX1
#if CONFIG_IDF_TARGET_ESP32
#define TX1 10
#elif CONFIG_IDF_TARGET_ESP32S2
#define TX1 17
#elif CONFIG_IDF_TARGET_ESP32C3
#define TX1 19
#elif CONFIG_IDF_TARGET_ESP32S3
#define TX1 16
#endif
#endif
void serialEvent1(void) __attribute__((weak));
void serialEvent1(void) {}
#endif /* SOC_UART_NUM > 1 */
#if SOC_UART_NUM > 2
#ifndef RX2
#if CONFIG_IDF_TARGET_ESP32
#define RX2 16
#elif CONFIG_IDF_TARGET_ESP32S3
#define RX2 19
#endif
#endif
#ifndef TX2
#if CONFIG_IDF_TARGET_ESP32
#define TX2 17
#elif CONFIG_IDF_TARGET_ESP32S3
#define TX2 20
#endif
#endif
void serialEvent2(void) __attribute__((weak));
void serialEvent2(void) {}
#endif /* SOC_UART_NUM > 2 */
#if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SERIAL)
#if ARDUINO_USB_CDC_ON_BOOT //Serial used for USB CDC
HardwareSerial Serial0(0);
#else
HardwareSerial Serial(0);
#endif
#if SOC_UART_NUM > 1
HardwareSerial Serial1(1);
#endif
#if SOC_UART_NUM > 2
HardwareSerial Serial2(2);
#endif
void serialEventRun(void)
{
#if ARDUINO_USB_CDC_ON_BOOT //Serial used for USB CDC
if(Serial0.available()) serialEvent();
#else
if(Serial.available()) serialEvent();
#endif
#if SOC_UART_NUM > 1
if(Serial1.available()) serialEvent1();
#endif
#if SOC_UART_NUM > 2
if(Serial2.available()) serialEvent2();
#endif
}
#endif
#if !CONFIG_DISABLE_HAL_LOCKS
#define HSERIAL_MUTEX_LOCK() do {} while (xSemaphoreTake(_lock, portMAX_DELAY) != pdPASS)
#define HSERIAL_MUTEX_UNLOCK() xSemaphoreGive(_lock)
#else
#define HSERIAL_MUTEX_LOCK()
#define HSERIAL_MUTEX_UNLOCK()
#endif
HardwareSerial::HardwareSerial(int uart_nr) :
_uart_nr(uart_nr),
_uart(NULL),
_rxBufferSize(256),
_txBufferSize(0),
_onReceiveCB(NULL),
_onReceiveErrorCB(NULL),
_onReceiveTimeout(false),
_rxTimeout(2),
_rxFIFOFull(0),
_eventTask(NULL)
#if !CONFIG_DISABLE_HAL_LOCKS
,_lock(NULL)
#endif
,_rxPin(-1)
,_txPin(-1)
,_ctsPin(-1)
,_rtsPin(-1)
{
#if !CONFIG_DISABLE_HAL_LOCKS
if(_lock == NULL){
_lock = xSemaphoreCreateMutex();
if(_lock == NULL){
log_e("xSemaphoreCreateMutex failed");
return;
}
}
#endif
}
HardwareSerial::~HardwareSerial()
{
end();
#if !CONFIG_DISABLE_HAL_LOCKS
if(_lock != NULL){
vSemaphoreDelete(_lock);
}
#endif
}
void HardwareSerial::_createEventTask(void *args)
{
// Creating UART event Task
xTaskCreateUniversal(_uartEventTask, "uart_event_task", ARDUINO_SERIAL_EVENT_TASK_STACK_SIZE, this, ARDUINO_SERIAL_EVENT_TASK_PRIORITY, &_eventTask, ARDUINO_SERIAL_EVENT_TASK_RUNNING_CORE);
if (_eventTask == NULL) {
log_e(" -- UART%d Event Task not Created!", _uart_nr);
}
}
void HardwareSerial::_destroyEventTask(void)
{
if (_eventTask != NULL) {
vTaskDelete(_eventTask);
_eventTask = NULL;
}
}
void HardwareSerial::onReceiveError(OnReceiveErrorCb function)
{
HSERIAL_MUTEX_LOCK();
// function may be NULL to cancel onReceive() from its respective task
_onReceiveErrorCB = function;
// this can be called after Serial.begin(), therefore it shall create the event task
if (function != NULL && _uart != NULL && _eventTask == NULL) {
_createEventTask(this);
}
HSERIAL_MUTEX_UNLOCK();
}
void HardwareSerial::onReceive(OnReceiveCb function, bool onlyOnTimeout)
{
HSERIAL_MUTEX_LOCK();
// function may be NULL to cancel onReceive() from its respective task
_onReceiveCB = function;
// setting the callback to NULL will just disable it
if (_onReceiveCB != NULL) {
// When Rx timeout is Zero (disabled), there is only one possible option that is callback when FIFO reaches 120 bytes
_onReceiveTimeout = _rxTimeout > 0 ? onlyOnTimeout : false;
// in case that onReceive() shall work only with RX Timeout, FIFO shall be high
// this is a work around for an IDF issue with events and low FIFO Full value (< 3)
if (_onReceiveTimeout) {
uartSetRxFIFOFull(_uart, 120);
log_w("OnReceive is set to Timeout only, thus FIFO Full is now 120 bytes.");
}
// this method can be called after Serial.begin(), therefore it shall create the event task
if (_uart != NULL && _eventTask == NULL) {
_createEventTask(this); // Create event task
}
}
HSERIAL_MUTEX_UNLOCK();
}
// This function allow the user to define how many bytes will trigger an Interrupt that will copy RX FIFO to the internal RX Ringbuffer
// ISR will also move data from FIFO to RX Ringbuffer after a RX Timeout defined in HardwareSerial::setRxTimeout(uint8_t symbols_timeout)
// A low value of FIFO Full bytes will consume more CPU time within the ISR
// A high value of FIFO Full bytes will make the application wait longer to have byte available for the Stkech in a streaming scenario
// Both RX FIFO Full and RX Timeout may affect when onReceive() will be called
bool HardwareSerial::setRxFIFOFull(uint8_t fifoBytes)
{
HSERIAL_MUTEX_LOCK();
// in case that onReceive() shall work only with RX Timeout, FIFO shall be high
// this is a work around for an IDF issue with events and low FIFO Full value (< 3)
if (_onReceiveCB != NULL && _onReceiveTimeout) {
fifoBytes = 120;
log_w("OnReceive is set to Timeout only, thus FIFO Full is now 120 bytes.");
}
bool retCode = uartSetRxFIFOFull(_uart, fifoBytes); // Set new timeout
if (fifoBytes > 0 && fifoBytes < SOC_UART_FIFO_LEN - 1) _rxFIFOFull = fifoBytes;
HSERIAL_MUTEX_UNLOCK();
return retCode;
}
// timout is calculates in time to receive UART symbols at the UART baudrate.
// the estimation is about 11 bits per symbol (SERIAL_8N1)
bool HardwareSerial::setRxTimeout(uint8_t symbols_timeout)
{
HSERIAL_MUTEX_LOCK();
// Zero disables timeout, thus, onReceive callback will only be called when RX FIFO reaches 120 bytes
// Any non-zero value will activate onReceive callback based on UART baudrate with about 11 bits per symbol
_rxTimeout = symbols_timeout;
if (!symbols_timeout) _onReceiveTimeout = false; // only when RX timeout is disabled, we also must disable this flag
bool retCode = uartSetRxTimeout(_uart, _rxTimeout); // Set new timeout
HSERIAL_MUTEX_UNLOCK();
return retCode;
}
void HardwareSerial::eventQueueReset()
{
QueueHandle_t uartEventQueue = NULL;
if (_uart == NULL) {
return;
}
uartGetEventQueue(_uart, &uartEventQueue);
if (uartEventQueue != NULL) {
xQueueReset(uartEventQueue);
}
}
void HardwareSerial::_uartEventTask(void *args)
{
HardwareSerial *uart = (HardwareSerial *)args;
uart_event_t event;
QueueHandle_t uartEventQueue = NULL;
uartGetEventQueue(uart->_uart, &uartEventQueue);
if (uartEventQueue != NULL) {
for(;;) {
//Waiting for UART event.
if(xQueueReceive(uartEventQueue, (void * )&event, (portTickType)portMAX_DELAY)) {
hardwareSerial_error_t currentErr = UART_NO_ERROR;
switch(event.type) {
case UART_DATA:
if(uart->_onReceiveCB && uart->available() > 0 &&
((uart->_onReceiveTimeout && event.timeout_flag) || !uart->_onReceiveTimeout) )
uart->_onReceiveCB();
break;
case UART_FIFO_OVF:
log_w("UART%d FIFO Overflow. Consider adding Hardware Flow Control to your Application.", uart->_uart_nr);
currentErr = UART_FIFO_OVF_ERROR;
break;
case UART_BUFFER_FULL:
log_w("UART%d Buffer Full. Consider increasing your buffer size of your Application.", uart->_uart_nr);
currentErr = UART_BUFFER_FULL_ERROR;
break;
case UART_BREAK:
log_w("UART%d RX break.", uart->_uart_nr);
currentErr = UART_BREAK_ERROR;
break;
case UART_PARITY_ERR:
log_w("UART%d parity error.", uart->_uart_nr);
currentErr = UART_PARITY_ERROR;
break;
case UART_FRAME_ERR:
log_w("UART%d frame error.", uart->_uart_nr);
currentErr = UART_FRAME_ERROR;
break;
default:
log_w("UART%d unknown event type %d.", uart->_uart_nr, event.type);
break;
}
if (currentErr != UART_NO_ERROR) {
if(uart->_onReceiveErrorCB) uart->_onReceiveErrorCB(currentErr);
}
}
}
}
vTaskDelete(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 >= SOC_UART_NUM) {
log_e("Serial number is invalid, please use numers from 0 to %u", SOC_UART_NUM - 1);
return;
}
#if !CONFIG_DISABLE_HAL_LOCKS
if(_lock == NULL){
log_e("MUTEX Lock failed. Can't begin.");
return;
}
#endif
HSERIAL_MUTEX_LOCK();
// First Time or after end() --> set default Pins
if (!uartIsDriverInstalled(_uart)) {
switch (_uart_nr) {
case UART_NUM_0:
if (rxPin < 0 && txPin < 0) {
rxPin = SOC_RX0;
txPin = SOC_TX0;
}
break;
#if SOC_UART_NUM > 1 // may save some flash bytes...
case UART_NUM_1:
if (rxPin < 0 && txPin < 0) {
rxPin = RX1;
txPin = TX1;
}
break;
#endif
#if SOC_UART_NUM > 2 // may save some flash bytes...
case UART_NUM_2:
if (rxPin < 0 && txPin < 0) {
rxPin = RX2;
txPin = TX2;
}
break;
#endif
}
}
// map logical pins to GPIO numbers
rxPin = digitalPinToGPIONumber(rxPin);
txPin = digitalPinToGPIONumber(txPin);
if(_uart) {
// in this case it is a begin() over a previous begin() - maybe to change baud rate
// thus do not disable debug output
end(false);
}
// IDF UART driver keeps Pin setting on restarting. Negative Pin number will keep it unmodified.
_uart = uartBegin(_uart_nr, baud ? baud : 9600, config, rxPin, txPin, _rxBufferSize, _txBufferSize, invert, rxfifo_full_thrhd);
if (!baud) {
// using baud rate as zero, forces it to try to detect the current baud rate in place
uartStartDetectBaudrate(_uart);
time_t startMillis = millis();
unsigned long detectedBaudRate = 0;
while(millis() - startMillis < timeout_ms && !(detectedBaudRate = uartDetectBaudrate(_uart))) {
yield();
}
end(false);
if(detectedBaudRate) {
delay(100); // Give some time...
_uart = uartBegin(_uart_nr, detectedBaudRate, config, rxPin, txPin, _rxBufferSize, _txBufferSize, 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;
}
}
// create a task to deal with Serial Events when, for example, calling begin() twice to change the baudrate,
// or when setting the callback before calling begin()
if (_uart != NULL && (_onReceiveCB != NULL || _onReceiveErrorCB != NULL) && _eventTask == NULL) {
_createEventTask(this);
}
// Set UART RX timeout
uartSetRxTimeout(_uart, _rxTimeout);
// Set UART FIFO Full depending on the baud rate.
// Lower baud rates will force to emulate byte-by-byte reading
// Higher baud rates will keep IDF default of 120 bytes for FIFO FULL Interrupt
// It can also be changed by the application at any time
if (!_rxFIFOFull) { // it has not being changed before calling begin()
// set a default FIFO Full value for the IDF driver
uint8_t fifoFull = 1;
if (baud > 57600 || (_onReceiveCB != NULL && _onReceiveTimeout)) {
fifoFull = 120;
}
uartSetRxFIFOFull(_uart, fifoFull);
_rxFIFOFull = fifoFull;
}
_rxPin = rxPin;
_txPin = txPin;
HSERIAL_MUTEX_UNLOCK();
}
void HardwareSerial::updateBaudRate(unsigned long baud)
{
uartSetBaudRate(_uart, baud);
}
void HardwareSerial::end(bool fullyTerminate)
{
// default Serial.end() will completely disable HardwareSerial,
// including any tasks or debug message channel (log_x()) - but not for IDF log messages!
if(fullyTerminate) {
_onReceiveCB = NULL;
_onReceiveErrorCB = NULL;
if (uartGetDebug() == _uart_nr) {
uartSetDebug(0);
}
_rxFIFOFull = 0;
uartDetachPins(_uart, _rxPin, _txPin, _ctsPin, _rtsPin);
_rxPin = _txPin = _ctsPin = _rtsPin = -1;
}
delay(10);
uartEnd(_uart);
_uart = 0;
_destroyEventTask();
}
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)
{
uint8_t c = 0;
if (uartReadBytes(_uart, &c, 1, 0) == 1) {
return c;
} else {
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)
{
return uartReadBytes(_uart, buffer, size, 0);
}
// Overrides Stream::readBytes() to be faster using IDF
size_t HardwareSerial::readBytes(uint8_t *buffer, size_t length)
{
return uartReadBytes(_uart, buffer, length, (uint32_t)getTimeout());
}
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 uartIsDriverInstalled(_uart);
}
void HardwareSerial::setRxInvert(bool invert)
{
uartSetRxInvert(_uart, invert);
}
// negative Pin value will keep it unmodified
bool HardwareSerial::setPins(int8_t rxPin, int8_t txPin, int8_t ctsPin, int8_t rtsPin)
{
if(_uart == NULL) {
log_e("setPins() shall be called after begin() - nothing done\n");
return false;
}
// map logical pins to GPIO numbers
rxPin = digitalPinToGPIONumber(rxPin);
txPin = digitalPinToGPIONumber(txPin);
ctsPin = digitalPinToGPIONumber(ctsPin);
rtsPin = digitalPinToGPIONumber(rtsPin);
// uartSetPins() checks if pins are valid for each function and for the SoC
bool retCode = uartSetPins(_uart, rxPin, txPin, ctsPin, rtsPin);
if (retCode) {
_txPin = _txPin >= 0 ? txPin : _txPin;
_rxPin = _rxPin >= 0 ? rxPin : _rxPin;
_rtsPin = _rtsPin >= 0 ? rtsPin : _rtsPin;
_ctsPin = _ctsPin >= 0 ? ctsPin : _ctsPin;
} else {
log_e("Error when setting Serial port Pins. Invalid Pin.\n");
}
return retCode;
}
// Enables or disables Hardware Flow Control using RTS and/or CTS pins (must use setAllPins() before)
bool HardwareSerial::setHwFlowCtrlMode(uint8_t mode, uint8_t threshold)
{
return uartSetHwFlowCtrlMode(_uart, mode, threshold);
}
// Sets the uart mode in the esp32 uart for use with RS485 modes (HwFlowCtrl must be disabled and RTS pin set)
bool HardwareSerial::setMode(uint8_t mode)
{
return uartSetMode(_uart, mode);
}
size_t HardwareSerial::setRxBufferSize(size_t new_size) {
if (_uart) {
log_e("RX Buffer can't be resized when Serial is already running.\n");
return 0;
}
if (new_size <= SOC_UART_FIFO_LEN) {
log_e("RX Buffer must be higher than %d.\n", SOC_UART_FIFO_LEN); // ESP32, S2, S3 and C3 means higher than 128
return 0;
}
_rxBufferSize = new_size;
return _rxBufferSize;
}
size_t HardwareSerial::setTxBufferSize(size_t new_size) {
if (_uart) {
log_e("TX Buffer can't be resized when Serial is already running.\n");
return 0;
}
if (new_size <= SOC_UART_FIFO_LEN) {
log_e("TX Buffer must be higher than %d.\n", SOC_UART_FIFO_LEN); // ESP32, S2, S3 and C3 means higher than 128
return 0;
}
_txBufferSize = new_size;
return _txBufferSize;
}
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