mirror of
https://github.com/emsesp/EMS-ESP32.git
synced 2025-12-06 07:49:52 +03:00
76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
/*
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* EMS-ESP - https://github.com/emsesp/EMS-ESP
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* Copyright 2020 Paul Derbyshire
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* ESP32 UART port by @ArwedL and improved by @MichaelDvP. See https://github.com/emsesp/EMS-ESP/issues/380
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*/
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#ifndef EMSESP_EMSUART_H
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#define EMSESP_EMSUART_H
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#define EMS_MAXBUFFERSIZE 33 // max size of the buffer. EMS packets are max 32 bytes, plus extra for BRK
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#define EMSUART_NUM UART_NUM_1 // on C3 and S2 there is no UART2, use UART1 for all
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#define EMSUART_BAUD 9600 // uart baud rate for the EMS circuit
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#define EMS_TXMODE_DEFAULT 1
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#define EMS_TXMODE_EMSPLUS 2
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#define EMS_TXMODE_HT3 3
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#define EMS_TXMODE_HW 4
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// LEGACY
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#define EMSUART_TX_BIT_TIME 104 // bit time @9600 baud
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// EMS 1.0
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#define EMSUART_TX_BUSY_WAIT (EMSUART_TX_BIT_TIME / 8) // 13
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#define EMSUART_TX_TIMEOUT (20 * EMSUART_TX_BIT_TIME / EMSUART_TX_BUSY_WAIT)
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#define EMSUART_TX_BRK_EMS (EMSUART_TX_BIT_TIME * 10)
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// 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.
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// since we use a faster processor the lag is negligible
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#define EMSUART_TX_WAIT_HT3 (EMSUART_TX_BIT_TIME * 17) // 1768
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#define EMSUART_TX_BRK_HT3 (EMSUART_TX_BIT_TIME * 11)
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// EMS+ - Time to send one Byte (8 Bits, 1 Start Bit, 1 Stop Bit) and delay of another Bytetime.
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#define EMSUART_TX_WAIT_PLUS (EMSUART_TX_BIT_TIME * 20) // 2080
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#define EMSUART_TX_BRK_PLUS (EMSUART_TX_BIT_TIME * 11)
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namespace emsesp {
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#define EMS_TX_STATUS_OK 1
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#define EMS_TX_STATUS_ERR 0
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class EMSuart {
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public:
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EMSuart() = default;
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~EMSuart() = default;
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static void start(const uint8_t tx_mode, const uint8_t rx_gpio, const uint8_t tx_gpio);
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static void send_poll(const uint8_t data);
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static void stop();
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static uint16_t transmit(const uint8_t * buf, const uint8_t len);
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private:
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static void uart_event_task(void * pvParameters);
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};
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} // namespace emsesp
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#endif
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