feat(i2c): Add api for customize i2c transaction interface for un-standard i2c device

components/esp_driver_i2c/i2c_master.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2023-2025 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -285,7 +285,7 @@ static bool s_i2c_read_command(i2c_master_bus_handle_t i2c_master, i2c_operation
     i2c_master->contains_read = true;
 #if !SOC_I2C_STOP_INDEPENDENT
     if (remaining_bytes < I2C_FIFO_LEN(i2c_master->base->port_num) - 1) {
-        if (i2c_operation->hw_cmd.ack_val == ACK_VAL) {
+        if (i2c_operation->hw_cmd.ack_val == I2C_ACK_VAL) {
             if (remaining_bytes != 0) {
                 i2c_ll_master_write_cmd_reg(hal->dev, hw_cmd, i2c_master->cmd_idx);
                 i2c_master->read_len_static = i2c_master->rx_cnt;
@@ -321,7 +321,7 @@ static bool s_i2c_read_command(i2c_master_bus_handle_t i2c_master, i2c_operation
     portENTER_CRITICAL_SAFE(&handle->spinlock);
     // If the read command work with ack_val, but no bytes to read, we skip
     // this command, and run next command directly.
-    if (hw_cmd.ack_val == ACK_VAL) {
+    if (hw_cmd.ack_val == I2C_ACK_VAL) {
         if (i2c_operation->total_bytes == 0) {
             i2c_master->trans_idx++;
             hw_cmd = i2c_master->i2c_trans.ops[i2c_master->trans_idx].hw_cmd;
@@ -365,9 +365,14 @@ static void s_i2c_start_end_command(i2c_master_bus_handle_t i2c_master, i2c_oper
     uint8_t cmd_address = i2c_master->i2c_trans.device_address;
     uint8_t addr_byte = 1;
 #endif
+    if (i2c_master->i2c_trans.device_address == I2C_DEVICE_ADDRESS_NOT_USED) {
+        // Bypass the address.
+        addr_byte = 0;
+    }
     uint8_t addr_write[addr_byte];
     uint8_t addr_read[addr_byte];
 
+    if (addr_byte != 0) {
         addr_write[0] = I2C_ADDRESS_TRANS_WRITE(cmd_address);
         addr_read[0] = I2C_ADDRESS_TRANS_READ(cmd_address);
 #if SOC_I2C_SUPPORT_10BIT_ADDR
@@ -376,6 +381,7 @@ static void s_i2c_start_end_command(i2c_master_bus_handle_t i2c_master, i2c_oper
             addr_read[1] = i2c_master->i2c_trans.device_address & 0xff;
         }
 #endif
+    }
 
     portENTER_CRITICAL_SAFE(&i2c_master->base->spinlock);
     i2c_ll_master_write_cmd_reg(hal->dev, hw_cmd, i2c_master->cmd_idx);
@@ -1205,8 +1211,8 @@ esp_err_t i2c_master_transmit_receive(i2c_master_dev_handle_t i2c_dev, const uin
         {.hw_cmd = I2C_TRANS_START_COMMAND},
         {.hw_cmd = I2C_TRANS_WRITE_COMMAND(i2c_dev->ack_check_disable ? false : true), .data = (uint8_t *)write_buffer, .total_bytes = write_size},
         {.hw_cmd = I2C_TRANS_START_COMMAND},
-        {.hw_cmd = I2C_TRANS_READ_COMMAND(ACK_VAL), .data = read_buffer, .total_bytes = read_size - 1},
+        {.hw_cmd = I2C_TRANS_READ_COMMAND(I2C_ACK_VAL), .data = read_buffer, .total_bytes = read_size - 1},
-        {.hw_cmd = I2C_TRANS_READ_COMMAND(NACK_VAL), .data = (read_buffer + read_size - 1), .total_bytes = 1},
+        {.hw_cmd = I2C_TRANS_READ_COMMAND(I2C_NACK_VAL), .data = (read_buffer + read_size - 1), .total_bytes = 1},
         {.hw_cmd = I2C_TRANS_STOP_COMMAND},
     };
 
@@ -1225,8 +1231,8 @@ esp_err_t i2c_master_receive(i2c_master_dev_handle_t i2c_dev, uint8_t *read_buff
 
     i2c_operation_t i2c_ops[] = {
         {.hw_cmd = I2C_TRANS_START_COMMAND},
-        {.hw_cmd = I2C_TRANS_READ_COMMAND(ACK_VAL), .data = read_buffer, .total_bytes = read_size - 1},
+        {.hw_cmd = I2C_TRANS_READ_COMMAND(I2C_ACK_VAL), .data = read_buffer, .total_bytes = read_size - 1},
-        {.hw_cmd = I2C_TRANS_READ_COMMAND(NACK_VAL), .data = (read_buffer + read_size - 1), .total_bytes = 1},
+        {.hw_cmd = I2C_TRANS_READ_COMMAND(I2C_NACK_VAL), .data = (read_buffer + read_size - 1), .total_bytes = 1},
         {.hw_cmd = I2C_TRANS_STOP_COMMAND},
     };
 
@@ -1290,6 +1296,54 @@ esp_err_t i2c_master_probe(i2c_master_bus_handle_t bus_handle, uint16_t address,
     return ret;
 }
 
+esp_err_t i2c_master_execute_defined_operations(i2c_master_dev_handle_t i2c_dev, i2c_operation_job_t *i2c_operation, size_t operation_list_num, int xfer_timeout_ms)
+{
+    ESP_RETURN_ON_FALSE(i2c_dev != NULL, ESP_ERR_INVALID_ARG, TAG, "i2c handle not initialized");
+    ESP_RETURN_ON_FALSE(i2c_operation != NULL, ESP_ERR_INVALID_ARG, TAG, "i2c operation pointer is invalid");
+    ESP_RETURN_ON_FALSE(operation_list_num <= (SOC_I2C_CMD_REG_NUM), ESP_ERR_INVALID_ARG, TAG, "i2c command list cannot contain so many commands");
+
+    i2c_operation_t i2c_ops[operation_list_num] = {};
+    for (int i = 0; i < operation_list_num; i++) {
+        switch (i2c_operation[i].command) {
+        case I2C_MASTER_CMD_START:
+            i2c_ops[i].hw_cmd.op_code = I2C_LL_CMD_RESTART;
+            break;
+        case I2C_MASTER_CMD_WRITE:
+            i2c_ops[i].hw_cmd.op_code = I2C_LL_CMD_WRITE;
+            i2c_ops[i].hw_cmd.ack_en = i2c_operation[i].write.ack_check;
+            i2c_ops[i].data = i2c_operation[i].write.data;
+            i2c_ops[i].total_bytes = i2c_operation[i].write.total_bytes;
+            break;
+        case I2C_MASTER_CMD_READ:
+            i2c_ops[i].hw_cmd.op_code = I2C_LL_CMD_READ;
+            i2c_ops[i].hw_cmd.ack_val = i2c_operation[i].read.ack_value;
+            i2c_ops[i].data = i2c_operation[i].read.data;
+            i2c_ops[i].total_bytes = i2c_operation[i].read.total_bytes;
+            // Add check: If current command is READ and the next command is STOP, ack_value must be NACK
+            if (i + 1 < operation_list_num && i2c_operation[i + 1].command == I2C_MASTER_CMD_STOP) {
+                if (i2c_operation[i].read.ack_value != I2C_NACK_VAL) {
+                    ESP_LOGE(TAG, "ack_value must be NACK (1) when the next command of READ is STOP.");
+                    return ESP_ERR_INVALID_ARG;
+                }
+            }
+            break;
+        case I2C_MASTER_CMD_STOP:
+            i2c_ops[i].hw_cmd.op_code = I2C_LL_CMD_STOP;
+            break;
+        default:
+            ESP_LOGE(TAG, "Invalid command.");
+            return ESP_ERR_INVALID_ARG;
+        }
+    }
+
+    if (i2c_dev->master_bus->async_trans == false) {
+        ESP_RETURN_ON_ERROR(s_i2c_synchronous_transaction(i2c_dev, i2c_ops, operation_list_num, xfer_timeout_ms), TAG, "I2C transaction failed");
+    } else {
+        ESP_RETURN_ON_ERROR(s_i2c_asynchronous_transaction(i2c_dev, i2c_ops, operation_list_num, xfer_timeout_ms), TAG, "I2C transaction failed");
+    }
+    return ESP_OK;
+}
+
 esp_err_t i2c_master_register_event_callbacks(i2c_master_dev_handle_t i2c_dev, const i2c_master_event_callbacks_t *cbs, void *user_data)
 {
     ESP_RETURN_ON_FALSE(i2c_dev != NULL, ESP_ERR_INVALID_ARG, TAG, "i2c handle not initialized");

components/esp_driver_i2c/i2c_private.h

@@ -63,9 +63,6 @@ extern "C" {
 #define I2C_PM_LOCK_NAME_LEN_MAX 16
 #define I2C_STATIC_OPERATION_ARRAY_MAX 6
 
-#define ACK_VAL 0
-#define NACK_VAL 1
-
 #define I2C_TRANS_READ_COMMAND(ack_value)    {.ack_val = (ack_value), .op_code = I2C_LL_CMD_READ}
 #define I2C_TRANS_WRITE_COMMAND(ack_check)   {.ack_en = (ack_check), .op_code = I2C_LL_CMD_WRITE}
 #define I2C_TRANS_STOP_COMMAND               {.op_code = I2C_LL_CMD_STOP}

components/esp_driver_i2c/include/driver/i2c_master.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2023-2025 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -39,12 +39,14 @@ typedef struct {
     } flags;                              /*!< I2C master config flags */
 } i2c_master_bus_config_t;
 
+#define I2C_DEVICE_ADDRESS_NOT_USED    (0xffff) /*!< Skip carry address bit in driver transmit and receive */
+
 /**
  * @brief I2C device configuration
  */
 typedef struct {
     i2c_addr_bit_len_t dev_addr_length;         /*!< Select the address length of the slave device. */
-    uint16_t device_address;                    /*!< I2C device raw address. (The 7/10 bit address without read/write bit) */
+    uint16_t device_address;                    /*!< I2C device raw address. (The 7/10 bit address without read/write bit). Macro I2C_DEVICE_ADDRESS_NOT_USED (0xFFFF) stands for skip the address config inside driver. */
     uint32_t scl_speed_hz;                      /*!< I2C SCL line frequency. */
     uint32_t scl_wait_us;                      /*!< Timeout value. (unit: us). Please note this value should not be so small that it can handle stretch/disturbance properly. If 0 is set, that means use the default reg value*/
     struct {
@@ -52,6 +54,38 @@ typedef struct {
     } flags;                                    /*!< I2C device config flags */
 } i2c_device_config_t;
 
+/**
+ * @brief Structure representing an I2C operation job
+ *
+ * This structure is used to define individual I2C operations (write or read)
+ * within a sequence of I2C master transactions.
+ */
+typedef struct {
+    i2c_master_command_t command; /**< I2C command indicating the type of operation (START, WRITE, READ, or STOP) */
+    union {
+        /**
+         * @brief Structure for WRITE command
+         *
+         * Used when the `command` is set to `I2C_MASTER_CMD_WRITE`.
+         */
+        struct {
+            bool ack_check;        /**< Whether to enable ACK check during WRITE operation */
+            uint8_t *data;         /**< Pointer to the data to be written */
+            size_t total_bytes;    /**< Total number of bytes to write */
+        } write;
+        /**
+         * @brief Structure for READ command
+         *
+         * Used when the `command` is set to `I2C_MASTER_CMD_READ`.
+         */
+        struct {
+            i2c_ack_value_t ack_value; /**< ACK value to send after the read (ACK or NACK) */
+            uint8_t *data;                    /**< Pointer to the buffer for storing the data read from the bus */
+            size_t total_bytes;               /**< Total number of bytes to read */
+        } read;
+    };
+} i2c_operation_job_t;
+
 /**
  * @brief I2C master transmit buffer information structure
  */
@@ -218,6 +252,30 @@ esp_err_t i2c_master_receive(i2c_master_dev_handle_t i2c_dev, uint8_t *read_buff
  */
 esp_err_t i2c_master_probe(i2c_master_bus_handle_t bus_handle, uint16_t address, int xfer_timeout_ms);
 
+/**
+ * @brief Execute a series of pre-defined I2C operations.
+ *
+ * This function processes a list of I2C operations, such as start, write, read, and stop,
+ * according to the user-defined `i2c_operation_job_t` array. It performs these operations
+ * sequentially on the specified I2C master device.
+ *
+ * @param[in] i2c_dev           Handle to the I2C master device.
+ * @param[in] i2c_operation     Pointer to an array of user-defined I2C operation jobs.
+ *                              Each job specifies a command and associated parameters.
+ * @param[in] operation_list_num The number of operations in the `i2c_operation` array.
+ * @param[in] xfer_timeout_ms   Timeout for the transaction, in milliseconds.
+ *
+ * @return
+ *  - ESP_OK: Transaction completed successfully.
+ *  - ESP_ERR_INVALID_ARG: One or more arguments are invalid.
+ *  - ESP_ERR_TIMEOUT: Transaction timed out.
+ *  - ESP_FAIL: Other error during transaction.
+ *
+ * @note The `ack_value` field in the READ operation must be set to `I2C_NACK_VAL` if the next
+ *       operation is a STOP command.
+ */
+esp_err_t i2c_master_execute_defined_operations(i2c_master_dev_handle_t i2c_dev, i2c_operation_job_t *i2c_operation, size_t operation_list_num, int xfer_timeout_ms);
+
 /**
  * @brief Register I2C transaction callbacks for a master device
  *

components/esp_driver_i2c/include/driver/i2c_types.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2023-2025 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -45,6 +45,29 @@ typedef enum {
     I2C_EVENT_TIMEOUT,    /*!< i2c bus timeout */
 } i2c_master_event_t;
 
+/**
+ * @brief Enum for I2C master commands
+ *
+ * These commands are used to define the I2C master operations.
+ * They correspond to hardware-level commands supported by the I2C peripheral.
+ */
+typedef enum {
+    I2C_MASTER_CMD_START,    /**< Start or Restart condition */
+    I2C_MASTER_CMD_WRITE,    /**< Write operation */
+    I2C_MASTER_CMD_READ,     /**< Read operation */
+    I2C_MASTER_CMD_STOP,     /**< Stop condition */
+} i2c_master_command_t;
+
+/**
+ * @brief Enum for I2C master ACK values
+ *
+ * These values define the acknowledgment (ACK) behavior during read operations.
+ */
+typedef enum {
+    I2C_ACK_VAL = 0,  /**< Acknowledge (ACK) signal */
+    I2C_NACK_VAL = 1, /**< Not Acknowledge (NACK) signal */
+}  __attribute__((packed)) i2c_ack_value_t;
+
 /**
  * @brief Type of I2C master bus handle
  */