board.cpp: Fixed internal I2C initialization exception.

Fixed the internal I2C initialization exception of CoreS3.

Signed-off-by: lbuque <lbuque@163.com>

Author: lbuque

m5stack/board.cpp

@@ -11,7 +11,7 @@ extern "C" {
     // #include <driver/periph_ctrl.h>
     #include "esp_log.h"
 
-    void in_i2c_init(void)
+    static void in_i2c_init(void)
     {
         gpio_num_t in_scl = (gpio_num_t)M5.getPin(m5::pin_name_t::in_i2c_scl);
         gpio_num_t in_sda = (gpio_num_t)M5.getPin(m5::pin_name_t::in_i2c_sda);
@@ -28,12 +28,7 @@ extern "C" {
 #endif
 
         if (in_scl != 255 || in_sda != 255) {
-            ESP_LOGW("BOARD", "I2C1 init");
-            if (in_port == I2C_NUM_0) {
-                // periph_module_enable(PERIPH_I2C0_MODULE);
-            } else {
-                // periph_module_enable(PERIPH_I2C1_MODULE);
-            }
+            ESP_LOGI("BOARD", "Internal I2C(%d) init", in_port);
             i2c_config_t conf;
             memset(&conf, 0, sizeof(i2c_config_t));
             conf.mode = I2C_MODE_MASTER;
@@ -53,7 +48,8 @@ extern "C" {
         auto cfg = M5.config();
         cfg.output_power = false;
         M5.begin(cfg);
-        in_i2c_init();
+        // in_i2c_init();
+        // M5.In_I2C.release();
     }
 
     void power_init()

m5stack/components/M5Unified/mpy_m5unified.cpp

@@ -345,6 +345,44 @@ mp_obj_t m5_add_display(mp_obj_t i2c_bus_in, mp_obj_t addr_in, mp_obj_t dict) {
     return m5_getDisplay(mp_obj_new_int(M5.getDisplayCount() - 1));
 }
 
+
+static void in_i2c_init(void) {
+    gpio_num_t in_scl = (gpio_num_t)M5.getPin(m5::pin_name_t::in_i2c_scl);
+    gpio_num_t in_sda = (gpio_num_t)M5.getPin(m5::pin_name_t::in_i2c_sda);
+    gpio_num_t ex_scl = (gpio_num_t)M5.getPin(m5::pin_name_t::ex_i2c_scl);
+    gpio_num_t ex_sda = (gpio_num_t)M5.getPin(m5::pin_name_t::ex_i2c_sda);
+    i2c_port_t ex_port = I2C_NUM_0;
+    #if SOC_I2C_NUM == 1
+    i2c_port_t in_port = I2C_NUM_0;
+    #else
+    i2c_port_t in_port = I2C_NUM_1;
+    if (in_scl == ex_scl && in_sda == ex_sda) {
+        in_port = ex_port;
+    }
+    #endif
+
+    if (in_scl != 255 || in_sda != 255) {
+        ESP_LOGI("BOARD", "Internal I2C(%d) init", in_port);
+        // if (in_port == I2C_NUM_0) {
+        //     periph_module_enable(PERIPH_I2C0_MODULE);
+        // } else {
+        //     periph_module_enable(PERIPH_I2C1_MODULE);
+        // }
+        i2c_config_t conf;
+        memset(&conf, 0, sizeof(i2c_config_t));
+        conf.mode = I2C_MODE_MASTER;
+        conf.sda_io_num = in_sda;
+        conf.sda_pullup_en = GPIO_PULLUP_ENABLE;
+        conf.scl_io_num = in_scl;
+        conf.scl_pullup_en = GPIO_PULLUP_ENABLE;
+        conf.master.clk_speed = 100000;
+        // .clk_flags = 0,          /*!< Optional, you can use I2C_SCLK_SRC_FLAG_* flags to choose i2c source clock here. */
+        i2c_param_config(in_port, &conf);
+        i2c_driver_install(in_port, I2C_MODE_MASTER, 0, 0, 0);
+    }
+}
+
+
 // TODO: pass configuration parameters
 mp_obj_t m5_begin(size_t n_args, const mp_obj_t *args) {
     mp_obj_t config_obj = mp_const_none;
@@ -362,6 +400,7 @@ mp_obj_t m5_begin(size_t n_args, const mp_obj_t *args) {
 
     // initial
     M5.begin(cfg);
+    in_i2c_init();
     // if (M5.getBoard() != m5::board_t::board_M5StackCoreS3
     //     && M5.getBoard() != m5::board_t::board_M5StackCoreS3SE
     //     && M5.getBoard() != m5::board_t::board_M5StackCore2