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RawSerial.cpp
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RawSerial.cpp
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/*
* RawSerial.cpp
*
* Created on: Oct 2019
* Author: raulMrello
*
*/
#include "RawSerial.h"
//------------------------------------------------------------------------------------
//-- STATIC IMPLEMENTATION -----------------------------------------------------------
//------------------------------------------------------------------------------------
#define STRING_STACK_LIMIT 120
//------------------------------------------------------------------------------------
static const char* _MODULE_ = "[RawSerial].....";
#define _EXPR_ (!IS_ISR())
//------------------------------------------------------------------------------------
//-- PUBLIC METHODS IMPLEMENTATION ---------------------------------------------------
//------------------------------------------------------------------------------------
//------------------------------------------------------------------------------------
RawSerial::RawSerial(PinName tx, PinName rx, int baud, uart_port_t uart_num, osPriority priority, uint32_t stack_size){
DEBUG_TRACE_D(_EXPR_, _MODULE_, "Iniciando RawSerial");
_uart_config = {0};
_tx = tx;
_rx = rx;
_rts = NC;
_cts = NC;
_uart_num = uart_num;
_priority = priority;
_stack_size = stack_size;
_irq[RxIrq] = (Callback<void()>) NULL;
_irq[TxIrq] = (Callback<void()>) NULL;
_irq[ErrIrq] = (Callback<void()>) NULL;
_uart_config.baud_rate = baud;
_th = new Thread(_priority, _stack_size, NULL, "RawSerial");
MBED_ASSERT(_th);
_installed = false;
_started = false;
}
//------------------------------------------------------------------------------------
RawSerial::~RawSerial() {
if(_uart_num >= UART_NUM_MAX){
return;
}
// desactivo interrupciones tx,rx
uart_disable_rx_intr(_uart_num);
uart_disable_tx_intr(_uart_num);
// libero isr y driver
uart_isr_free(_uart_num);
uart_driver_delete(_uart_num);
}
//------------------------------------------------------------------------------------
void RawSerial::baud(int baudrate){
if(_uart_num >= UART_NUM_MAX){
return;
}
_uart_config.baud_rate = baudrate;
if(_installed){
DEBUG_TRACE_D(_EXPR_, _MODULE_, "Actualizando baudrate=%d", baudrate);
uart_set_baudrate(_uart_num, _uart_config.baud_rate);
}
else if(_uart_config.data_bits != 0){
_install();
}
}
//---------------------------------------------------------------------------------
void RawSerial::format(int bits, RawSerial::Parity parity, int stop_bits){
if(_uart_num >= UART_NUM_MAX){
return;
}
_uart_config.data_bits = bits-UART_DATA_BITS_MAX-1;
_uart_config.parity = (parity == None)? UART_PARITY_DISABLE : ((parity==Odd)? UART_PARITY_ODD : UART_PARITY_EVEN);
_uart_config.stop_bits = (stop_bits==3)? UART_STOP_BITS_1_5 : ((stop_bits==1)? UART_STOP_BITS_1 : UART_STOP_BITS_2);
if(_installed){
DEBUG_TRACE_D(_EXPR_, _MODULE_, "Actualizando formato num_bits=%d, parity=%d, stop_bits=%d", bits, (int)parity, stop_bits);
uart_set_word_length(_uart_num, _uart_config.data_bits);
uart_set_parity(_uart_num, _uart_config.parity);
uart_set_stop_bits(_uart_num, _uart_config.stop_bits);
}
else if(_uart_config.baud_rate != 0){
_install();
}
}
//------------------------------------------------------------------------------------
void RawSerial::setFlowCtrl(PinName rts, PinName cts, RawSerial::Flow flow){
if(_uart_num >= UART_NUM_MAX){
return;
}
_rts = (rts!=NC)? rts : UART_PIN_NO_CHANGE;
_cts = (cts!=NC)? cts : UART_PIN_NO_CHANGE;
_uart_config.flow_ctrl = (flow==Disabled)? UART_HW_FLOWCTRL_DISABLE : ((flow==RTS)? UART_HW_FLOWCTRL_RTS : ((flow==CTS)? UART_HW_FLOWCTRL_CTS : UART_HW_FLOWCTRL_CTS_RTS));
if(_installed){
DEBUG_TRACE_D(_EXPR_, _MODULE_, "Actualizando control de flujo rts=%d, cts=%d, flow=%d", (int)rts, (int)cts, (int)flow);
uart_set_pin(_uart_num, _tx, _rx, _rts, _cts);
uart_set_hw_flow_ctrl(_uart_num, _uart_config.flow_ctrl, 0);
}
}
//------------------------------------------------------------------------------------
int RawSerial::readable(){
if(_uart_num >= UART_NUM_MAX){
return 0;
}
size_t size = 0;
uart_get_buffered_data_len(_uart_num, &size);
DEBUG_TRACE_D(_EXPR_, _MODULE_, "readable = %d", size);
return (size > 0)? 1 : 0;
}
//------------------------------------------------------------------------------------
int RawSerial::writeable(){
if(_uart_num >= UART_NUM_MAX){
return 0;
}
return((uart_wait_tx_done(_uart_num, 0) == ESP_OK)? 1 : 0);
}
//------------------------------------------------------------------------------------
int RawSerial::putChar(int c) {
if(!_started){
return -1;
}
char cc = (char)c;
int sent = 0;
if((sent = uart_write_bytes(_uart_num, &cc, 1)) != -1){
DEBUG_TRACE_D(_EXPR_, _MODULE_, "OK!, pushed into fifo %d bytes", sent);
}
else{
DEBUG_TRACE_E(_EXPR_, _MODULE_, "ERROR!");
}
// si ha sido un envío bloqueante por semáforo, lo libera
DEBUG_TRACE_D(_EXPR_, _MODULE_, "Notificando trama enviada");
if(_irq[TxIrq]){
_irq[TxIrq].call();
}
return sent;
}
//------------------------------------------------------------------------------------
int RawSerial::puts(const char *str) {
if(!_started){
return -1;
}
int size = strlen(str);
int sent = 0;
if((sent = uart_write_bytes(_uart_num, str, size)) != -1){
DEBUG_TRACE_D(_EXPR_, _MODULE_, "OK!, pushed into fifo %d bytes", sent);
}
else{
DEBUG_TRACE_E(_EXPR_, _MODULE_, "ERROR!");
}
// si ha sido un envío bloqueante por semáforo, lo libera
DEBUG_TRACE_D(_EXPR_, _MODULE_, "Notificando trama enviada");
if(_irq[TxIrq]){
_irq[TxIrq].call();
}
return sent;
}
//---------------------------------------------------------------------------------
int RawSerial::printf(const char *format, ...) {
if(!_started){
return -1;
}
va_list arg;
lock();
va_start(arg, format);
// ARMCC microlib does not properly handle a size of 0.
// As a workaround supply a dummy buffer with a size of 1.
char dummy_buf[1];
int len = vsnprintf(dummy_buf, sizeof(dummy_buf), format, arg);
if (len < STRING_STACK_LIMIT) {
char temp[STRING_STACK_LIMIT];
vsprintf(temp, format, arg);
puts(temp);
} else {
char *temp = new char[len + 1];
vsprintf(temp, format, arg);
puts(temp);
delete[] temp;
}
va_end(arg);
unlock();
return len;
}
//------------------------------------------------------------------------------------
int RawSerial::getChar(){
if(!_started){
return 0;
}
if(_rxcnt < _rxsz){
return _rxbuf[_rxcnt++];
}
return -1;
}
//------------------------------------------------------------------------------------
//-- PRIVATE METHODS IMPLEMENTATION --------------------------------------------------
//------------------------------------------------------------------------------------
//------------------------------------------------------------------------------------
void RawSerial::_install(){
DEBUG_TRACE_D(_EXPR_, _MODULE_, "Configurando uart");
if(uart_param_config(_uart_num, &_uart_config) != ESP_OK){
DEBUG_TRACE_E(_EXPR_, _MODULE_, "Error al configurar uart");
return;
}
DEBUG_TRACE_D(_EXPR_, _MODULE_, "Estableciendo pines");
if(uart_set_pin(_uart_num, _tx, _rx, (_rts==NC)? UART_PIN_NO_CHANGE : _rts, (_cts==NC)? UART_PIN_NO_CHANGE : _cts) != ESP_OK){
DEBUG_TRACE_E(_EXPR_, _MODULE_, "Error al configurar pines de la uart");
return;
}
DEBUG_TRACE_D(_EXPR_, _MODULE_, "Instalando uart");
if(uart_driver_install(_uart_num, DefaultBufferLength, DefaultBufferLength, DefaultQueueDepth, &_queue, 0) != ESP_OK){
DEBUG_TRACE_E(_EXPR_, _MODULE_, "Error al instalar uart");
return;
}
DEBUG_TRACE_D(_EXPR_, _MODULE_, "Driver instalado");
_installed = true;
_started = false;
DEBUG_TRACE_D(_EXPR_, _MODULE_, "Iniciando thread");
_th->start(callback(this, &RawSerial::_task));
_sem.wait();
_started = true;
DEBUG_TRACE_D(_EXPR_, _MODULE_, "RawSerial iniciado!");
}
//------------------------------------------------------------------------------------
void RawSerial::_task() {
uart_event_t event;
DEBUG_TRACE_D(_EXPR_, _MODULE_, "Iniciando tarea y cola de mensajes...");
_sem.release();
for(;;){
if (xQueueReceive(_queue, (void * )&event, (portTickType)osWaitForever)){
uart_event_t* evt = &event;
MBED_ASSERT(evt);
_curr_event = evt->type;
DEBUG_TRACE_D(_EXPR_, _MODULE_, "Se ha recibido el evento %x", (uint32_t)evt->type);
switch (evt->type) {
case UART_DATA_BREAK: {
DEBUG_TRACE_D(_EXPR_, _MODULE_, "EVT: uart_data_break!");
/* Evento al finalizar un envío */
if(_irq[TxIrq]){
_irq[TxIrq].call();
}
break;
}
case UART_DATA: {
DEBUG_TRACE_D(_EXPR_, _MODULE_, "EVT: uart_data ");
size_t size = 0;
uart_get_buffered_data_len(_uart_num, &size);
DEBUG_TRACE_D(_EXPR_, _MODULE_, "%d bytes", size);
if(size > 0){
uint8_t* buffer = new uint8_t[size];
MBED_ASSERT(buffer);
size = uart_read_bytes(_uart_num, buffer, size, 0);
DEBUG_TRACE_D(_EXPR_, _MODULE_, "Read %d bytes", size);
_rxbuf = buffer;
_rxsz = size;
_rxcnt = 0;
if(_irq[RxIrq]){
_irq[RxIrq].call();
}
_rxbuf = NULL;
_rxsz = 0;
delete(buffer);
}
break;
}
/// Error fifo overflow
case UART_FIFO_OVF: {
DEBUG_TRACE_D(_EXPR_, _MODULE_, "EVT: uart_fifo_ovf!");
// If fifo overflow happened, you should consider adding flow control for your application.
// We can read data out out the buffer, or directly flush the Rx buffer.
uart_flush(_uart_num);
if(_irq[ErrIrq]){
_irq[ErrIrq].call();
}
break;
}
/// Error buffer lleno
case UART_BUFFER_FULL: {
DEBUG_TRACE_D(_EXPR_, _MODULE_, "EVT: uart_buffer_full!");
// If buffer full happened, you should consider increasing your buffer size
// We can read data out out the buffer, or directly flush the Rx buffer.
uart_flush(_uart_num);
if(_irq[ErrIrq]){
_irq[ErrIrq].call();
}
break;
}
/// Detección de BREAK en recepción (es el fin de trama recibido)
case UART_BREAK: {
break;
}
/// Error de paridad
case UART_PARITY_ERR: {
DEBUG_TRACE_D(_EXPR_, _MODULE_, "EVT: uart_parity_err!");
uart_flush(_uart_num);
if(_irq[ErrIrq]){
_irq[ErrIrq].call();
}
break;
}
/// Error de frame
case UART_FRAME_ERR: {
DEBUG_TRACE_D(_EXPR_, _MODULE_, "EVT: uart_frame_err!");
uart_flush(_uart_num);
if(_irq[ErrIrq]){
_irq[ErrIrq].call();
}
break;
}
/// Detección de patrón recibido
case UART_PATTERN_DET: {
DEBUG_TRACE_D(_EXPR_, _MODULE_, "EVT: uart_pattern_det!");
break;
}
default:
DEBUG_TRACE_D(_EXPR_, _MODULE_, "EVT: unhandled_evt=%d!", evt->type);
break;
}
}
}
}