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Implement new idf-v5 I2C driver (#677)
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* moved sccb to new i2c driver

* implemented val16 functions

* address to dev_handle translation

* moved new i2c driver to a seperate file

* removed old idf version warning
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@playduck
playduck authored Sep 13, 2024
1 parent 7aa37d4 commit 8e1ec63
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10 changes: 9 additions & 1 deletion CMakeLists.txt
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Expand Up @@ -26,7 +26,6 @@ if(IDF_TARGET STREQUAL "esp32" OR IDF_TARGET STREQUAL "esp32s2" OR IDF_TARGET ST
list(APPEND srcs
driver/esp_camera.c
driver/cam_hal.c
driver/sccb.c
driver/sensor.c
sensors/ov2640.c
sensors/ov3660.c
Expand Down Expand Up @@ -82,6 +81,15 @@ if(IDF_TARGET STREQUAL "esp32" OR IDF_TARGET STREQUAL "esp32s2" OR IDF_TARGET ST
list(APPEND priv_requires esp_timer)
endif()

# include the SCCB I2C driver
# this uses either the legacy I2C API or the newwer version from IDF v5.4
# as this features a method to obtain the I2C driver from a port number
if (idf_version VERSION_GREATER_EQUAL "5.4")
list(APPEND srcs driver/sccb-ng.c)
else()
list(APPEND srcs driver/sccb.c)
endif()

endif()

# CONFIG_ESP_ROM_HAS_JPEG_DECODE is available from IDF v4.4 but
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358 changes: 358 additions & 0 deletions driver/sccb-ng.c
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@@ -0,0 +1,358 @@
/*
* This file is part of the OpenMV project.
* Copyright (c) 2013/2014 Ibrahim Abdelkader <[email protected]>
* This work is licensed under the MIT license, see the file LICENSE for details.
*
* SCCB (I2C like) driver with the new esp-idf I2C API.
*
*/
#include <stdbool.h>
#include <string.h>
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include "sccb.h"
#include "sensor.h"
#include <stdio.h>
#include "sdkconfig.h"
#if defined(ARDUINO_ARCH_ESP32) && defined(CONFIG_ARDUHAL_ESP_LOG)
#include "esp32-hal-log.h"
#else
#include "esp_log.h"
static const char *TAG = "sccb-ng";
#endif

#define LITTLETOBIG(x) ((x << 8) | (x >> 8))

#include "esp_private/i2c_platform.h"
#include "driver/i2c_master.h"
#include "driver/i2c_types.h"

// support IDF 5.x
#ifndef portTICK_RATE_MS
#define portTICK_RATE_MS portTICK_PERIOD_MS
#endif

#define TIMEOUT_MS 1000 /*!< I2C timeout duration */
#define SCCB_FREQ CONFIG_SCCB_CLK_FREQ /*!< I2C master frequency */
#define WRITE_BIT I2C_MASTER_WRITE /*!< I2C master write */
#define READ_BIT I2C_MASTER_READ /*!< I2C master read */
#define ACK_CHECK_EN 0x1 /*!< I2C master will check ack from slave */
#define ACK_CHECK_DIS 0x0 /*!< I2C master will not check ack from slave */
#define ACK_VAL 0x0 /*!< I2C ack value */
#define NACK_VAL 0x1 /*!< I2C nack value */
#if CONFIG_SCCB_HARDWARE_I2C_PORT1
const int SCCB_I2C_PORT_DEFAULT = 1;
#else
const int SCCB_I2C_PORT_DEFAULT = 0;
#endif

#define MAX_DEVICES UINT8_MAX-1

/*
The legacy I2C driver used addresses to differentiate between devices, whereas the new driver uses
i2c_master_dev_handle_t structs which are registed to the bus.
To avoid re-writing all camera dependant code, we simply translate the devices address to the corresponding
device_handle. This keeps all interfaces to the drivers identical.
To perform this conversion the following local struct is used.
*/
typedef struct
{
i2c_master_dev_handle_t dev_handle;
uint16_t address;
} device_t;

static device_t devices[MAX_DEVICES];
static uint8_t device_count = 0;
static int sccb_i2c_port;
static bool sccb_owns_i2c_port;

i2c_master_dev_handle_t *get_handle_from_address(uint8_t slv_addr)
{
for (uint8_t i = 0; i < device_count; i++)
{

if (slv_addr == devices[i].address)
{
return &(devices[i].dev_handle);
}
}

ESP_LOGE(TAG, "Device with address %02x not found", slv_addr);
return NULL;
}

int SCCB_Install_Device(uint8_t slv_addr)
{
esp_err_t ret;
i2c_master_bus_handle_t bus_handle;

if (device_count > MAX_DEVICES)
{
ESP_LOGE(TAG, "cannot add more than %d devices", MAX_DEVICES);
return ESP_FAIL;
}

ret = i2c_master_get_bus_handle(sccb_i2c_port, &bus_handle);
if (ret != ESP_OK)
{
ESP_LOGE(TAG, "failed to get SCCB I2C Bus handle for port %d", sccb_i2c_port);
return ret;
}

i2c_device_config_t dev_cfg = {
.dev_addr_length = I2C_ADDR_BIT_LEN_7,
.device_address = slv_addr, // not yet set
.scl_speed_hz = SCCB_FREQ,
};

ret = i2c_master_bus_add_device(bus_handle, &dev_cfg, &(devices[device_count].dev_handle));
if (ret != ESP_OK)
{
ESP_LOGE(TAG, "failed to install SCCB I2C device: %s", esp_err_to_name(ret));
return -1;
}

devices[device_count].address = slv_addr;
device_count++;
return 0;
}

int SCCB_Init(int pin_sda, int pin_scl)
{
ESP_LOGI(TAG, "pin_sda %d pin_scl %d", pin_sda, pin_scl);
// i2c_config_t conf;
esp_err_t ret;

sccb_i2c_port = SCCB_I2C_PORT_DEFAULT;
sccb_owns_i2c_port = true;
ESP_LOGI(TAG, "sccb_i2c_port=%d", sccb_i2c_port);

i2c_master_bus_config_t i2c_mst_config = {
.clk_source = I2C_CLK_SRC_DEFAULT,
.i2c_port = SCCB_I2C_PORT_DEFAULT,
.scl_io_num = pin_scl,
.sda_io_num = pin_sda,
.glitch_ignore_cnt = 7,
.flags.enable_internal_pullup = 1};

i2c_master_bus_handle_t bus_handle;
ret = i2c_new_master_bus(&i2c_mst_config, &bus_handle);

if (ret != ESP_OK)
{
ESP_LOGE(TAG, "failed to install SCCB I2C master bus on port %d: %s", sccb_i2c_port, esp_err_to_name(ret));
return ret;
}

return ESP_OK;
}

int SCCB_Use_Port(int i2c_num)
{ // sccb use an already initialized I2C port
if (sccb_owns_i2c_port)
{
SCCB_Deinit();
}
if (i2c_num < 0 || i2c_num > I2C_NUM_MAX)
{
return ESP_ERR_INVALID_ARG;
}
sccb_i2c_port = i2c_num;

return ESP_OK;
}

int SCCB_Deinit(void)
{
esp_err_t ret;

for (uint8_t i = 0; i < device_count; i++)
{
ret = i2c_master_bus_rm_device(devices[i].dev_handle);
if (ret != ESP_OK)
{
ESP_LOGE(TAG, "failed to remove SCCB I2C Device");
return ret;
}

devices[i].dev_handle = NULL;
devices[i].address = 0;
}
device_count = 0;

if (!sccb_owns_i2c_port)
{
return ESP_OK;
}
sccb_owns_i2c_port = false;

i2c_master_bus_handle_t bus_handle;
ret = i2c_master_get_bus_handle(sccb_i2c_port, &bus_handle);
if (ret != ESP_OK)
{
ESP_LOGE(TAG, "failed to get SCCB I2C Bus handle for port %d", sccb_i2c_port);
return ret;
}

ret = i2c_del_master_bus(bus_handle);
if (ret != ESP_OK)
{
ESP_LOGE(TAG, "failed to get delete SCCB I2C Master Bus at port %d", sccb_i2c_port);
return ret;
}

return ESP_OK;
}

uint8_t SCCB_Probe(void)
{
uint8_t slave_addr = 0x0;
esp_err_t ret;
i2c_master_bus_handle_t bus_handle;

ret = i2c_master_get_bus_handle(sccb_i2c_port, &bus_handle);
if (ret != ESP_OK)
{
ESP_LOGE(TAG, "failed to get SCCB I2C Bus handle for port %d", sccb_i2c_port);
return ret;
}

for (size_t i = 0; i < CAMERA_MODEL_MAX; i++)
{
if (slave_addr == camera_sensor[i].sccb_addr)
{
continue;
}
slave_addr = camera_sensor[i].sccb_addr;

ret = i2c_master_probe(bus_handle, slave_addr, TIMEOUT_MS);

if (ret == ESP_OK)
{
if (SCCB_Install_Device(slave_addr) != 0)
{
return 0;
}
return slave_addr;
}
}
return 0;
}

uint8_t SCCB_Read(uint8_t slv_addr, uint8_t reg)
{
i2c_master_dev_handle_t dev_handle = *(get_handle_from_address(slv_addr));

uint8_t tx_buffer[1];
uint8_t rx_buffer[1];

tx_buffer[0] = reg;

esp_err_t ret = i2c_master_transmit_receive(dev_handle, tx_buffer, 1, rx_buffer, 1, TIMEOUT_MS);

if (ret != ESP_OK)
{
ESP_LOGE(TAG, "SCCB_Read Failed addr:0x%02x, reg:0x%02x, data:0x%02x, ret:%d", slv_addr, reg, rx_buffer[0], ret);
}

return rx_buffer[0];
}

int SCCB_Write(uint8_t slv_addr, uint8_t reg, uint8_t data)
{
i2c_master_dev_handle_t dev_handle = *(get_handle_from_address(slv_addr));

uint8_t tx_buffer[2];
tx_buffer[0] = reg;
tx_buffer[1] = data;

esp_err_t ret = i2c_master_transmit(dev_handle, tx_buffer, 2, TIMEOUT_MS);

if (ret != ESP_OK)
{
ESP_LOGE(TAG, "SCCB_Write Failed addr:0x%02x, reg:0x%02x, data:0x%02x, ret:%d", slv_addr, reg, data, ret);
}

return ret == ESP_OK ? 0 : -1;
}

uint8_t SCCB_Read16(uint8_t slv_addr, uint16_t reg)
{
i2c_master_dev_handle_t dev_handle = *(get_handle_from_address(slv_addr));

uint8_t rx_buffer[1];

uint16_t reg_htons = LITTLETOBIG(reg);
uint8_t *reg_u8 = (uint8_t *)&reg_htons;

esp_err_t ret = i2c_master_transmit_receive(dev_handle, reg_u8, 2, rx_buffer, 1, TIMEOUT_MS);

if (ret != ESP_OK)
{
ESP_LOGE(TAG, "W [%04x]=%02x fail\n", reg, rx_buffer[0]);
}

return rx_buffer[0];
}

int SCCB_Write16(uint8_t slv_addr, uint16_t reg, uint8_t data)
{
i2c_master_dev_handle_t dev_handle = *(get_handle_from_address(slv_addr));

uint16_t reg_htons = LITTLETOBIG(reg);

uint8_t tx_buffer[3];
tx_buffer[0] = reg_htons >> 8;
tx_buffer[1] = reg_htons & 0x00ff;
tx_buffer[2] = data;

esp_err_t ret = i2c_master_transmit(dev_handle, tx_buffer, 3, TIMEOUT_MS);

if (ret != ESP_OK)
{
ESP_LOGE(TAG, "W [%04x]=%02x fail\n", reg, data);
}
return ret == ESP_OK ? 0 : -1;
}

uint16_t SCCB_Read_Addr16_Val16(uint8_t slv_addr, uint16_t reg)
{
i2c_master_dev_handle_t dev_handle = *(get_handle_from_address(slv_addr));

uint8_t rx_buffer[2];

uint16_t reg_htons = LITTLETOBIG(reg);
uint8_t *reg_u8 = (uint8_t *)&reg_htons;

esp_err_t ret = i2c_master_transmit_receive(dev_handle, reg_u8, 2, rx_buffer, 2, TIMEOUT_MS);
uint16_t data = ((uint16_t)rx_buffer[0] << 8) | (uint16_t)rx_buffer[1];

if (ret != ESP_OK)
{
ESP_LOGE(TAG, "W [%04x]=%02x fail\n", reg, data);
}

return data;
}

int SCCB_Write_Addr16_Val16(uint8_t slv_addr, uint16_t reg, uint16_t data)
{
i2c_master_dev_handle_t dev_handle = *(get_handle_from_address(slv_addr));

uint16_t reg_htons = LITTLETOBIG(reg);

uint8_t tx_buffer[4];
tx_buffer[0] = reg_htons >> 8;
tx_buffer[1] = reg_htons & 0x00ff;
tx_buffer[2] = data >> 8;
tx_buffer[3] = data & 0x00ff;

esp_err_t ret = i2c_master_transmit(dev_handle, tx_buffer, 4, TIMEOUT_MS);

if (ret != ESP_OK)
{
ESP_LOGE(TAG, "W [%04x]=%02x fail\n", reg, data);
}
return ret == ESP_OK ? 0 : -1;
return 0;
}
1 change: 1 addition & 0 deletions driver/sccb.c
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
* SCCB (I2C like) driver.
*
*/

#include <stdbool.h>
#include <string.h>
#include <freertos/FreeRTOS.h>
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