start implementation i2c eeprom driver

CMakeLists.txt

@@ -31,6 +31,7 @@ idf_component_register(
     	  src/RestApiHandler.c
     	  src/SysComm.c
     	  src/SysErr.c
+    	  src/EEPROM.c
     	  ${lora_SRCS}
     	  ${gprs_SRCS}
     	  ${jreadwrite_SRCS}

include/SystemApplication.h

@@ -122,4 +122,7 @@ sys_error_code SysVarsPayloadHandler(data_message_t *MSG);
 void GetSysErrorDetales(sys_error_code err, const char **br, const char **ds);
 
 
+esp_err_t eepr_i2c_read(uint16_t addr, uint8_t *data, int length);
+esp_err_t eepr_i2c_write(uint16_t addr, uint8_t *data, int length);
+
 #endif /* COMPONENTS_WEBGUIAPP_INCLUDE_SYSTEMAPPLICATION_H_ */

src/EEPROM.c

@@ -0,0 +1,109 @@
+ /* Copyright 2024 Bogdan Pilyugin
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *   File name: EEPROM.c
+ *     Project: EVCHS_Stick
+ *  Created on: 2024-06-20
+ *      Author: bogd
+ * Description:	
+ */
+
+#include "webguiapp.h"
+#include "driver/i2c.h"
+#include "esp_log.h"
+#include "esp_err.h"
+
+#define TAG "EEPROMDriver"
+
+
+#define I2C_MASTER_TIMEOUT_MS       1000
+#define I2C_MASTER_NUM              CONFIG_I2C_HOST                           /*!< I2C master i2c port number, the number of i2c peripheral interfaces available will depend on the chip */
+#define I2C_MASTER_SDA_GPIO         CONFIG_I2C_SDA_GPIO         /*!< I2C master i2c SDA pin*/
+#define I2C_MASTER_SCL_GPIO         CONFIG_I2C_SCL_GPIO                          /*!< I2C master i2c SCL pin*/
+
+#define EEPR24CXX_ADDR                  0xA0                        /*!< Slave address of 24Cxx devices*/
+
+typedef struct
+{
+    i2c_port_t port;            // I2C port number
+    uint8_t addr;               // I2C address
+    uint32_t clk_speed;             // I2C clock frequency for master mode
+} i2c_dev_t;
+
+
+i2c_dev_t eepr_24c32 = {
+        .port = I2C_MASTER_NUM,
+        .addr = EEPR24CXX_ADDR >> 1,
+        .clk_speed = CONFIG_I2C_CLOCK
+};
+
+static esp_err_t i2c_dev_read(const i2c_dev_t *dev, const void *out_data, size_t out_size, void *in_data, size_t in_size)
+{
+    if (!dev || !in_data || !in_size) return ESP_ERR_INVALID_ARG;
+
+    i2c_cmd_handle_t cmd = i2c_cmd_link_create();
+    if (out_data && out_size)
+    {
+        i2c_master_start(cmd);
+        i2c_master_write_byte(cmd, (dev->addr << 1) | I2C_MASTER_WRITE, true);
+        i2c_master_write(cmd, (void *)out_data, out_size, true);
+    }
+    i2c_master_start(cmd);
+    i2c_master_write_byte(cmd, (dev->addr << 1) | 1, true);
+    i2c_master_read(cmd, in_data, in_size, I2C_MASTER_LAST_NACK);
+    i2c_master_stop(cmd);
+
+    esp_err_t res = i2c_master_cmd_begin(dev->port, cmd, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
+    /*
+    if (res != ESP_OK)
+        ESP_LOGE(TAG, "Could not read from device [0x%02x at %d]: %d", dev->addr, dev->port, res);
+        */
+    i2c_cmd_link_delete(cmd);
+    return res;
+}
+
+static esp_err_t i2c_dev_write(const i2c_dev_t *dev, const void *out_reg, size_t out_reg_size, const void *out_data, size_t out_size)
+{
+    if (!dev || !out_data || !out_size) return ESP_ERR_INVALID_ARG;
+
+    i2c_cmd_handle_t cmd = i2c_cmd_link_create();
+    i2c_master_start(cmd);
+    i2c_master_write_byte(cmd, (dev->addr << 1) | I2C_MASTER_WRITE, true);
+    if (out_reg && out_reg_size)
+        i2c_master_write(cmd, (void *)out_reg, out_reg_size, true);
+    i2c_master_write(cmd, (void *)out_data, out_size, true);
+    i2c_master_stop(cmd);
+
+    esp_err_t res = i2c_master_cmd_begin(dev->port, cmd, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
+    /*
+    if (res != ESP_OK)
+        ESP_LOGE(TAG, "Could not write to device [0x%02x at %d]: %d", dev->addr, dev->port, res);
+        */
+    i2c_cmd_link_delete(cmd);
+    return res;
+}
+
+esp_err_t eepr_i2c_read(uint16_t addr, uint8_t *data, int length)
+{
+    uint8_t adr[] = { (uint8_t)(addr >> 8), (uint8_t)(addr & 0xff) };
+    return i2c_dev_read(&eepr_24c32 , adr, 2, data, length);
+}
+
+
+esp_err_t eepr_i2c_write(uint16_t addr, uint8_t *data, int length)
+{
+    uint8_t adr[] = { (uint8_t)(addr >> 8), (uint8_t)(addr & 0xff) };
+    return i2c_dev_write(&eepr_24c32 , adr, 2, data, length);
+}
+