Inital Commit, Network Selection, Master Selection and Running Partition

Detection works

.gitignore

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+build
+sdkconfig.old

CMakeLists.txt

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+# The following five lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.16)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(powerpod)

main/CMakeLists.txt

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+idf_component_register(SRCS "powerpod.c"
+                    INCLUDE_DIRS ".")

main/powerpod.c

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+#include "powerpod.h"
+#include "driver/gpio.h"
+#include "driver/i2c_master.h"
+#include "driver/i2c_types.h"
+#include "esp_err.h"
+#include "esp_flash_partitions.h"
+#include "esp_log.h"
+#include "esp_ota_ops.h"
+#include "nvs.h"
+#include "nvs_flash.h"
+#include <stdint.h>
+
+enum MASTER_STATES {
+  MSTATE_INIT,
+  MSTATE_IDLE,
+  MSTATE_NORMAL,
+  MSTATE_DEEP_SLEEP,
+  MSTATE_LOW_POWER,
+  MSTATE_FAULT,
+  MSTATE_UART_UPDATE,
+  MSTATE_OTA_UPDATE,
+};
+
+enum SLAVE_STATES {
+  SSTATE_INIT,
+  SSTATE_IDLE,
+  SSTATE_NORMAL,
+  SSTATE_DEEP_SLEEP,
+  SSTATE_LOW_POWER,
+  SSTATE_FAULT,
+  SSTATE_UART_UPDATE,
+  SSTATE_OTA_UPDATE,
+};
+
+struct app_config_t {
+  uint8_t Master;
+  uint8_t Network;
+  char RunningPartition[17];
+};
+
+static const char *TAG = "[Main]";
+
+static i2c_master_bus_handle_t bus_handle;
+static i2c_master_dev_handle_t io_expander;
+
+static struct app_config_t App_Config;
+
+uint8_t reverse_high_nibble_lut(uint8_t n) {
+  static const uint8_t lookup[] = {0x0, 0x8, 0x4, 0xC, 0x2, 0xA, 0x6, 0xE,
+                                   0x1, 0x9, 0x5, 0xD, 0x3, 0xB, 0x7, 0xF};
+
+  return (lookup[n >> 4] << 4) | (n & 0x0F);
+}
+
+void app_main(void) {
+  // Get Master Mode Pin
+  gpio_reset_pin(DIP_MASTER);
+  gpio_set_direction(DIP_MASTER, GPIO_MODE_INPUT);
+  uint8_t master = gpio_get_level(DIP_MASTER) ? 0 : 1;
+  uint8_t network = 0;
+
+  esp_err_t err;
+
+  /* Init I2C IO Expander */
+  i2c_master_bus_config_t i2c_mst_config = {
+      .clk_source = I2C_CLK_SRC_DEFAULT,
+      .i2c_port = I2C_PORT,
+      .scl_io_num = I2C_SCL,
+      .sda_io_num = I2C_SDA,
+      .glitch_ignore_cnt = 7,
+      .flags.enable_internal_pullup = true,
+  };
+
+  err = i2c_new_master_bus(&i2c_mst_config, &bus_handle);
+  if (err != ESP_OK) {
+    ESP_LOGI(TAG, "I2C Master Could not Init Bus");
+  }
+
+  i2c_device_config_t dev_cfg = {
+      .dev_addr_length = I2C_ADDR_BIT_LEN_7,
+      .device_address = IO_EXPANDER_ADDRESS,
+      .scl_speed_hz = 100000,
+  };
+  err = i2c_master_bus_add_device(bus_handle, &dev_cfg, &io_expander);
+  if (err != ESP_OK) {
+    ESP_LOGI(TAG, "Could not add IO Expnader to Bus %d", err);
+  } else {
+
+    uint8_t write_buf[2] = {0x03, 0xFF}; // 0xFF setzt alle Bits auf Input
+    err = i2c_master_transmit(io_expander, write_buf, sizeof(write_buf), -1);
+    if (err != ESP_OK) {
+      ESP_LOGI(TAG, "Could not set IO Expander in input mode %d", err);
+    }
+
+    uint8_t reg_addr = 0x00;
+    uint8_t read_val = 0;
+
+    err = i2c_master_transmit_receive(io_expander, &reg_addr, 1, &read_val, 1,
+                                      -1);
+    if (err != ESP_OK) {
+      ESP_LOGI(TAG, "Could not read IO Expander input %d", err);
+    }
+    // Build NetworkNumber because Pin 5-8 are reversed
+    network = reverse_high_nibble_lut(read_val);
+    network = ~network; //reverse bits
+  }
+
+  esp_err_t ret = nvs_flash_init();
+  if (ret == ESP_ERR_NVS_NO_FREE_PAGES ||
+      ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
+    ESP_ERROR_CHECK(nvs_flash_erase());
+    ret = nvs_flash_init();
+  }
+  ESP_ERROR_CHECK(ret);
+
+  const esp_partition_t *running = esp_ota_get_running_partition();
+
+  App_Config.Master = (master == true);
+  App_Config.Network = network;
+  memcpy(App_Config.RunningPartition, running->label,
+         sizeof(App_Config.RunningPartition));
+
+  ESP_LOGI(TAG, "RUNNING CONFIG:");
+  ESP_LOGI(TAG, "Master:            %d", App_Config.Master);
+  ESP_LOGI(TAG, "Network:           %d", App_Config.Network);
+  ESP_LOGI(TAG, "Running Partition: %s", App_Config.RunningPartition);
+}

main/powerpod.h

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+#ifndef POWERPOD_H
+#define POWERPOD_H
+
+#define DIP_MASTER 4
+#define I2C_SCL 5
+#define I2C_SDA 6
+#define I2C_PORT 0
+#define IO_EXPANDER_ADDRESS 0x20
+
+#endif