mirror of https://github.com/arendst/Tasmota.git
212 lines
8.2 KiB
C++
212 lines
8.2 KiB
C++
/*
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xdrv_08_serial_bridge.ino - serial bridge support for Tasmota
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Copyright (C) 2021 Theo Arends and Dániel Zoltán Tolnai
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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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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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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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#ifdef USE_SERIAL_BRIDGE
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/*********************************************************************************************\
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* Serial Bridge using Software Serial library (TasmotaSerial)
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\*********************************************************************************************/
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#define XDRV_08 8
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#define HARDWARE_FALLBACK 2
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const uint16_t SERIAL_BRIDGE_BUFFER_SIZE = 256;
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const char kSerialBridgeCommands[] PROGMEM = "|" // No prefix
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D_CMND_SSERIALSEND "|" D_CMND_SBAUDRATE;
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void (* const SerialBridgeCommand[])(void) PROGMEM = {
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&CmndSSerialSend, &CmndSBaudrate };
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#include <TasmotaSerial.h>
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TasmotaSerial *SerialBridgeSerial = nullptr;
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unsigned long serial_bridge_polling_window = 0;
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char *serial_bridge_buffer = nullptr;
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int serial_bridge_in_byte_counter = 0;
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bool serial_bridge_active = true;
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bool serial_bridge_raw = false;
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void SerialBridgeInput(void)
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{
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while (SerialBridgeSerial->available()) {
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yield();
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uint8_t serial_in_byte = SerialBridgeSerial->read();
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if ((serial_in_byte > 127) && !serial_bridge_raw) { // Discard binary data above 127 if no raw reception allowed
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serial_bridge_in_byte_counter = 0;
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SerialBridgeSerial->flush();
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return;
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}
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if (serial_in_byte || serial_bridge_raw) { // Any char between 1 and 127 or any char (0 - 255)
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bool in_byte_is_delimiter = // Char is delimiter when...
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(((Settings->serial_delimiter < 128) && (serial_in_byte == Settings->serial_delimiter)) || // Any char between 1 and 127 and being delimiter
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((Settings->serial_delimiter == 128) && !isprint(serial_in_byte))) && // Any char not between 32 and 127
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!serial_bridge_raw; // In raw mode (CMND_SERIALSEND3) there is never a delimiter
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if ((serial_bridge_in_byte_counter < SERIAL_BRIDGE_BUFFER_SIZE -1) && // Add char to string if it still fits and ...
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!in_byte_is_delimiter) { // Char is not a delimiter
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serial_bridge_buffer[serial_bridge_in_byte_counter++] = serial_in_byte;
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}
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if ((serial_bridge_in_byte_counter >= SERIAL_BRIDGE_BUFFER_SIZE -1) || // Send message when buffer is full or ...
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in_byte_is_delimiter) { // Char is delimiter
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serial_bridge_polling_window = 0; // Publish now
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break;
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}
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serial_bridge_polling_window = millis(); // Wait for more data
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}
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}
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if (serial_bridge_in_byte_counter && (millis() > (serial_bridge_polling_window + SERIAL_POLLING))) {
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serial_bridge_buffer[serial_bridge_in_byte_counter] = 0; // Serial data completed
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bool assume_json = (!serial_bridge_raw && (serial_bridge_buffer[0] == '{'));
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Response_P(PSTR("{\"" D_JSON_SSERIALRECEIVED "\":"));
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if (assume_json) {
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ResponseAppend_P(serial_bridge_buffer);
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} else {
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ResponseAppend_P(PSTR("\""));
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if (serial_bridge_raw) {
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char hex_char[(serial_bridge_in_byte_counter * 2) + 2];
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ResponseAppend_P(ToHex_P((unsigned char*)serial_bridge_buffer, serial_bridge_in_byte_counter, hex_char, sizeof(hex_char)));
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} else {
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ResponseAppend_P(EscapeJSONString(serial_bridge_buffer).c_str());
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}
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ResponseAppend_P(PSTR("\""));
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}
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ResponseJsonEnd();
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MqttPublishPrefixTopicRulesProcess_P(RESULT_OR_TELE, PSTR(D_JSON_SSERIALRECEIVED));
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serial_bridge_in_byte_counter = 0;
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}
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}
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/********************************************************************************************/
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void SerialBridgeInit(void)
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{
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serial_bridge_active = false;
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if (PinUsed(GPIO_SBR_RX) && PinUsed(GPIO_SBR_TX)) {
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SerialBridgeSerial = new TasmotaSerial(Pin(GPIO_SBR_RX), Pin(GPIO_SBR_TX), HARDWARE_FALLBACK);
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#ifdef ESP8266
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if (SerialBridgeSerial->begin(Settings->sbaudrate * 300, (SerialConfig)ConvertSerialConfig(Settings->serial_config))) // Baud rate is stored div 300 so it fits into 16 bits
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#endif // ESP8266
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#ifdef ESP32
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if (SerialBridgeSerial->begin(Settings->sbaudrate * 300, ConvertSerialConfig(Settings->serial_config))) // Baud rate is stored div 300 so it fits into 16 bits
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#endif // ESP32
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{
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if (SerialBridgeSerial->hardwareSerial()) {
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ClaimSerial();
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serial_bridge_buffer = TasmotaGlobal.serial_in_buffer; // Use idle serial buffer to save RAM
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} else {
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serial_bridge_buffer = (char*)(malloc(SERIAL_BRIDGE_BUFFER_SIZE));
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}
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serial_bridge_active = true;
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SerialBridgeSerial->flush();
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}
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}
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}
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/*********************************************************************************************\
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* Commands
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\*********************************************************************************************/
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void CmndSSerialSend(void)
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{
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if ((XdrvMailbox.index > 0) && (XdrvMailbox.index <= 6)) {
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serial_bridge_raw = (XdrvMailbox.index > 3);
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if (XdrvMailbox.data_len > 0) {
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if (1 == XdrvMailbox.index) {
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SerialBridgeSerial->write(XdrvMailbox.data, XdrvMailbox.data_len); // "Hello Tiger"
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SerialBridgeSerial->write("\n"); // "\n"
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}
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else if ((2 == XdrvMailbox.index) || (4 == XdrvMailbox.index)) {
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SerialBridgeSerial->write(XdrvMailbox.data, XdrvMailbox.data_len); // "Hello Tiger" or "A0"
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}
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else if (3 == XdrvMailbox.index) { // "Hello\f"
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SerialBridgeSerial->write(Unescape(XdrvMailbox.data, &XdrvMailbox.data_len), XdrvMailbox.data_len);
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}
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else if (5 == XdrvMailbox.index) {
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char *p;
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char stemp[3];
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uint8_t code;
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char *codes = RemoveSpace(XdrvMailbox.data);
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int size = strlen(XdrvMailbox.data);
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while (size > 1) {
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strlcpy(stemp, codes, sizeof(stemp));
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code = strtol(stemp, &p, 16);
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SerialBridgeSerial->write(code); // "AA004566" as hex values
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size -= 2;
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codes += 2;
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}
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}
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else if (6 == XdrvMailbox.index) {
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char *p;
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uint8_t code;
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char *values = XdrvMailbox.data;
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for (char* str = strtok_r(values, ",", &p); str; str = strtok_r(nullptr, ",", &p)) {
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code = (uint8_t)atoi(str);
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SerialBridgeSerial->write(code); // "72,101,108,108"
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}
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}
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ResponseCmndDone();
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}
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}
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}
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void CmndSBaudrate(void)
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{
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if (XdrvMailbox.payload >= 300) {
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XdrvMailbox.payload /= 300; // Make it a valid baudrate
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Settings->sbaudrate = XdrvMailbox.payload;
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SerialBridgeSerial->begin(Settings->sbaudrate * 300); // Reinitialize serial port with new baud rate
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}
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ResponseCmndNumber(Settings->sbaudrate * 300);
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}
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/*********************************************************************************************\
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* Interface
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\*********************************************************************************************/
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bool Xdrv08(uint8_t function)
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{
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bool result = false;
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if (serial_bridge_active) {
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switch (function) {
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case FUNC_LOOP:
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if (SerialBridgeSerial) { SerialBridgeInput(); }
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break;
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case FUNC_PRE_INIT:
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SerialBridgeInit();
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break;
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case FUNC_COMMAND:
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result = DecodeCommand(kSerialBridgeCommands, SerialBridgeCommand);
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break;
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}
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}
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return result;
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}
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#endif // USE_SERIAL_BRIDGE
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