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proddy
2020-07-05 18:29:08 +02:00
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src/uart/emsuart_esp32.h Normal file
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/*
* EMS-ESP - https://github.com/proddy/EMS-ESP
* Copyright 2019 Paul Derbyshire
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* ESP32 UART port by @ArwedL and improved by @MichaelDvP. See https://github.com/proddy/EMS-ESP/issues/380
*/
#if defined(ESP32)
#ifndef EMSESP_EMSUART_H
#define EMSESP_EMSUART_H
#include <Arduino.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/ringbuf.h"
#include "freertos/queue.h"
#include <driver/uart.h>
#include <driver/timer.h>
#define EMS_MAXBUFFERSIZE 33 // max size of the buffer. EMS packets are max 32 bytes, plus extra for BRK
#define EMSUART_UART UART_NUM_2 // on the ESP32 we're using UART2
#define EMS_UART UART2 // for intr setting
#define EMSUART_BAUD 9600 // uart baud rate for the EMS circuit
#define EMS_TXMODE_DEFAULT 1
#define EMS_TXMODE_EMSPLUS 2
#define EMS_TXMODE_HT3 3
#define EMS_TXMODE_NEW 4 // for michael's testing
// LEGACY
#define EMSUART_TX_BIT_TIME 104 // bit time @9600 baud
#define EMSUART_TX_WAIT_BRK (EMSUART_TX_BIT_TIME * 11) // 1144
// EMS 1.0
#define EMSUART_TX_BUSY_WAIT (EMSUART_TX_BIT_TIME / 8) // 13
#define EMSUART_TX_TIMEOUT (32 * EMSUART_TX_BIT_TIME / EMSUART_TX_BUSY_WAIT) // 256
// HT3/Junkers - Time to send one Byte (8 Bits, 1 Start Bit, 1 Stop Bit) plus 7 bit delay. The -8 is for lag compensation.
// since we use a faster processor the lag is negligible
#define EMSUART_TX_WAIT_HT3 (EMSUART_TX_BIT_TIME * 17) // 1768
// EMS+ - Time to send one Byte (8 Bits, 1 Start Bit, 1 Stop Bit) and delay of another Bytetime.
#define EMSUART_TX_WAIT_PLUS (EMSUART_TX_BIT_TIME * 20) // 2080
// customize the GPIO pins for RX and TX here
#ifdef WEMOS_D1_32
#define EMSUART_RXPIN 23 // 17 is UART2 RX. Use 23 for D7 on a Wemos D1-32 mini for backwards compatabilty
#define EMSUART_TXPIN 5 // 16 is UART2 TX. Use 5 for D8 on a Wemos D1-32 mini for backwards compatabilty
#else
#define EMSUART_RXPIN 17 // 17 is UART2 RX. Use 23 for D7 on a Wemos D1-32 mini for backwards compatabilty
#define EMSUART_TXPIN 16 // 16 is UART2 TX. Use 5 for D8 on a Wemos D1-32 mini for backwards compatabilty
#endif
namespace emsesp {
#define EMS_TX_STATUS_OK 1
#define EMS_TX_STATUS_ERR 0
class EMSuart {
public:
EMSuart() = default;
~EMSuart() = default;
static void start(const uint8_t tx_mode);
static void send_poll(const uint8_t data);
static void stop();
static void restart();
static uint16_t transmit(const uint8_t * buf, const uint8_t len);
private:
static void emsuart_recvTask(void * para);
static void IRAM_ATTR emsuart_rx_intr_handler(void * para);
static void IRAM_ATTR emsuart_tx_timer_intr_handler();
};
} // namespace emsesp
#endif
#endif