HAL for Espressif ESP32 Wifi

2017-10-08 17:38:10 +01:00
parent 091f742432
commit e2aeda61ed
23 changed files with 1257 additions and 16 deletions
--- a/Marlin/src/HAL/HAL_ESP32/HAL.cpp
+++ b/Marlin/src/HAL/HAL_ESP32/HAL.cpp
@@ -0,0 +1,155 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * 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 ARDUINO_ARCH_ESP32
+
+// --------------------------------------------------------------------------
+// Includes
+// --------------------------------------------------------------------------
+
+#include "HAL.h"
+#include <rom/rtc.h>
+#include <driver/adc.h>
+#include <esp_adc_cal.h>
+
+#include "../../inc/MarlinConfigPre.h"
+
+#if ENABLED(WIFISUPPORT)
+  #include "ota.h"
+#endif
+
+// --------------------------------------------------------------------------
+// Externals
+// --------------------------------------------------------------------------
+
+portMUX_TYPE spinlock = portMUX_INITIALIZER_UNLOCKED;
+
+// --------------------------------------------------------------------------
+// Local defines
+// --------------------------------------------------------------------------
+
+#define V_REF 1100
+
+// --------------------------------------------------------------------------
+// Types
+// --------------------------------------------------------------------------
+
+// --------------------------------------------------------------------------
+// Variables
+// --------------------------------------------------------------------------
+
+// --------------------------------------------------------------------------
+// Public Variables
+// --------------------------------------------------------------------------
+
+uint16_t HAL_adc_result;
+
+// --------------------------------------------------------------------------
+// Private Variables
+// --------------------------------------------------------------------------
+
+esp_adc_cal_characteristics_t characteristics;
+
+// --------------------------------------------------------------------------
+// Function prototypes
+// --------------------------------------------------------------------------
+
+// --------------------------------------------------------------------------
+// Private functions
+// --------------------------------------------------------------------------
+
+// --------------------------------------------------------------------------
+// Public functions
+// --------------------------------------------------------------------------
+
+void HAL_init(void) {
+  #if ENABLED(WIFISUPPORT)
+    OTA_init();
+  #endif
+}
+
+void HAL_idletask(void) {
+  #if ENABLED(WIFISUPPORT)
+    OTA_handle();
+  #endif
+}
+
+void HAL_clear_reset_source(void) { }
+
+uint8_t HAL_get_reset_source (void) {
+  return rtc_get_reset_reason(1);
+}
+
+void _delay_ms(int delay_ms) {
+  delay(delay_ms);
+}
+
+// return free memory between end of heap (or end bss) and whatever is current
+int freeMemory() {
+  return ESP.getFreeHeap();
+}
+
+// --------------------------------------------------------------------------
+// ADC
+// --------------------------------------------------------------------------
+#define ADC1_CHANNEL(pin) ADC1_GPIO##pin_CHANNEL
+
+adc1_channel_t get_channel(int pin) {
+  switch (pin) {
+    case 36: return ADC1_GPIO36_CHANNEL;
+    case 39: return ADC1_GPIO39_CHANNEL;
+  }
+
+  return ADC1_CHANNEL_MAX;
+}
+
+void HAL_adc_init() {
+  // Configure ADC
+  adc1_config_width(ADC_WIDTH_12Bit);
+  adc1_config_channel_atten(get_channel(36), ADC_ATTEN_11db);
+  adc1_config_channel_atten(get_channel(39), ADC_ATTEN_11db);
+
+  // Calculate ADC characteristics i.e. gain and offset factors
+  esp_adc_cal_characterize(ADC_UNIT_1, ADC_ATTEN_DB_11, ADC_WIDTH_BIT_12, V_REF, &characteristics);
+}
+
+void HAL_adc_start_conversion (uint8_t adc_pin) {
+  uint32_t mv;
+  esp_adc_cal_get_voltage((adc_channel_t)get_channel(adc_pin), &characteristics, &mv);
+
+  HAL_adc_result = mv*1023.0/3300.0;
+}
+
+int pin_to_channel[40] = {};
+int cnt_channel = 1;
+void analogWrite(int pin, int value) {
+  if (pin_to_channel[pin] == 0) {
+    ledcAttachPin(pin, cnt_channel);
+    ledcSetup(cnt_channel, 490, 8);
+    ledcWrite(cnt_channel, value);
+
+    pin_to_channel[pin] = cnt_channel++;
+  }
+
+  ledcWrite(pin_to_channel[pin], value);
+}
+#endif // ARDUINO_ARCH_ESP32