initial commit

lib_standalone/emsuart_standalone.cpp

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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/>.
+ */
+
+#ifdef EMSESP_STANDALONE
+
+#include "emsuart_standalone.h"
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+
+namespace emsesp {
+
+/*
+ * init UART0 driver
+ */
+void EMSuart::start(uint8_t tx_mode) {
+}
+
+/*
+ * stop UART0 driver
+ * This is called prior to an OTA upload and also before a save to SPIFFS to prevent conflicts
+ */
+void EMSuart::stop() {
+}
+
+/*
+ * re-start UART0 driver
+ */
+void EMSuart::restart() {
+}
+
+/*
+ * Sends a 1-byte poll, ending with a <BRK>
+ * It's a bit dirty. there is no special wait logic per tx_mode type, fifo flushes or error checking
+ */
+void EMSuart::send_poll(uint8_t data) {
+}
+
+/*
+ * Send data to Tx line, ending with a <BRK>
+ * buf contains the CRC and len is #bytes including the CRC
+ * returns code, 0=success, 1=brk error, 2=watchdog timeout
+ */
+uint16_t EMSuart::transmit(uint8_t * buf, uint8_t len) {
+    if (len == 0) {
+        return EMS_TX_STATUS_OK; // nothing to send
+    }
+
+    // Code for when running EMS-ESP standalone without a connected ESP8266 microcontroller
+    // For debugging offline
+    Serial.print("UART SENDING: ");
+    char s[5];
+    for (uint8_t i = 0; i < len; i++) {
+        Serial.print(hextoa(s, buf[i]));
+        Serial.print(" ");
+    }
+    Serial.println();
+
+    return EMS_TX_STATUS_OK;
+}
+
+// like itoa but for hex, and quicker
+char * EMSuart::hextoa(char * result, const uint8_t value) {
+    char *  p    = result;
+    uint8_t nib1 = (value >> 4) & 0x0F;
+    uint8_t nib2 = (value >> 0) & 0x0F;
+    *p++         = nib1 < 0xA ? '0' + nib1 : 'A' + nib1 - 0xA;
+    *p++         = nib2 < 0xA ? '0' + nib2 : 'A' + nib2 - 0xA;
+    *p           = '\0'; // null terminate just in case
+    return result;
+}
+
+} // namespace emsesp
+
+#pragma GCC diagnostic pop
+
+#endif