You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
168 lines
5.8 KiB
168 lines
5.8 KiB
/*
|
|
* This file is part of the OpenMV project.
|
|
* Copyright (c) 2013/2014 Ibrahim Abdelkader <i.abdalkader@gmail.com>
|
|
* This work is licensed under the MIT license, see the file LICENSE for details.
|
|
*
|
|
* SCCB (I2C like) driver.
|
|
*
|
|
*/
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
#include <freertos/FreeRTOS.h>
|
|
#include <freertos/task.h>
|
|
#include "sccb.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";
|
|
#endif
|
|
|
|
#define LITTLETOBIG(x) ((x<<8)|(x>>8))
|
|
|
|
#include "driver/i2c.h"
|
|
|
|
#define SCCB_FREQ 100000 /*!< 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 = 1;
|
|
#else
|
|
const int SCCB_I2C_PORT = 0;
|
|
#endif
|
|
static uint8_t ESP_SLAVE_ADDR = 0x3c;
|
|
|
|
int SCCB_Init(int pin_sda, int pin_scl)
|
|
{
|
|
ESP_LOGI(TAG, "pin_sda %d pin_scl %d\n", pin_sda, pin_scl);
|
|
//log_i("SCCB_Init start");
|
|
i2c_config_t conf;
|
|
memset(&conf, 0, sizeof(i2c_config_t));
|
|
conf.mode = I2C_MODE_MASTER;
|
|
conf.sda_io_num = pin_sda;
|
|
conf.sda_pullup_en = GPIO_PULLUP_ENABLE;
|
|
conf.scl_io_num = pin_scl;
|
|
conf.scl_pullup_en = GPIO_PULLUP_ENABLE;
|
|
conf.master.clk_speed = SCCB_FREQ;
|
|
|
|
i2c_param_config(SCCB_I2C_PORT, &conf);
|
|
i2c_driver_install(SCCB_I2C_PORT, conf.mode, 0, 0, 0);
|
|
return 0;
|
|
}
|
|
|
|
uint8_t SCCB_Probe()
|
|
{
|
|
uint8_t slave_addr = 0x0;
|
|
while(slave_addr < 0x7f) {
|
|
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
|
|
i2c_master_start(cmd);
|
|
i2c_master_write_byte(cmd, ( slave_addr << 1 ) | WRITE_BIT, ACK_CHECK_EN);
|
|
i2c_master_stop(cmd);
|
|
esp_err_t ret = i2c_master_cmd_begin(SCCB_I2C_PORT, cmd, 1000 / portTICK_RATE_MS);
|
|
i2c_cmd_link_delete(cmd);
|
|
if( ret == ESP_OK) {
|
|
ESP_SLAVE_ADDR = slave_addr;
|
|
return ESP_SLAVE_ADDR;
|
|
}
|
|
slave_addr++;
|
|
}
|
|
return ESP_SLAVE_ADDR;
|
|
}
|
|
|
|
uint8_t SCCB_Read(uint8_t slv_addr, uint8_t reg)
|
|
{
|
|
uint8_t data=0;
|
|
esp_err_t ret = ESP_FAIL;
|
|
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
|
|
i2c_master_start(cmd);
|
|
i2c_master_write_byte(cmd, ( slv_addr << 1 ) | WRITE_BIT, ACK_CHECK_EN);
|
|
i2c_master_write_byte(cmd, reg, ACK_CHECK_EN);
|
|
i2c_master_stop(cmd);
|
|
ret = i2c_master_cmd_begin(SCCB_I2C_PORT, cmd, 1000 / portTICK_RATE_MS);
|
|
i2c_cmd_link_delete(cmd);
|
|
if(ret != ESP_OK) return -1;
|
|
cmd = i2c_cmd_link_create();
|
|
i2c_master_start(cmd);
|
|
i2c_master_write_byte(cmd, ( slv_addr << 1 ) | READ_BIT, ACK_CHECK_EN);
|
|
i2c_master_read_byte(cmd, &data, NACK_VAL);
|
|
i2c_master_stop(cmd);
|
|
ret = i2c_master_cmd_begin(SCCB_I2C_PORT, cmd, 1000 / portTICK_RATE_MS);
|
|
i2c_cmd_link_delete(cmd);
|
|
if(ret != ESP_OK) {
|
|
ESP_LOGE(TAG, "SCCB_Read Failed addr:0x%02x, reg:0x%02x, data:0x%02x, ret:%d", slv_addr, reg, data, ret);
|
|
}
|
|
return data;
|
|
}
|
|
|
|
uint8_t SCCB_Write(uint8_t slv_addr, uint8_t reg, uint8_t data)
|
|
{
|
|
esp_err_t ret = ESP_FAIL;
|
|
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
|
|
i2c_master_start(cmd);
|
|
i2c_master_write_byte(cmd, ( slv_addr << 1 ) | WRITE_BIT, ACK_CHECK_EN);
|
|
i2c_master_write_byte(cmd, reg, ACK_CHECK_EN);
|
|
i2c_master_write_byte(cmd, data, ACK_CHECK_EN);
|
|
i2c_master_stop(cmd);
|
|
ret = i2c_master_cmd_begin(SCCB_I2C_PORT, cmd, 1000 / portTICK_RATE_MS);
|
|
i2c_cmd_link_delete(cmd);
|
|
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)
|
|
{
|
|
uint8_t data=0;
|
|
esp_err_t ret = ESP_FAIL;
|
|
uint16_t reg_htons = LITTLETOBIG(reg);
|
|
uint8_t *reg_u8 = (uint8_t *)®_htons;
|
|
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
|
|
i2c_master_start(cmd);
|
|
i2c_master_write_byte(cmd, ( slv_addr << 1 ) | WRITE_BIT, ACK_CHECK_EN);
|
|
i2c_master_write_byte(cmd, reg_u8[0], ACK_CHECK_EN);
|
|
i2c_master_write_byte(cmd, reg_u8[1], ACK_CHECK_EN);
|
|
i2c_master_stop(cmd);
|
|
ret = i2c_master_cmd_begin(SCCB_I2C_PORT, cmd, 1000 / portTICK_RATE_MS);
|
|
i2c_cmd_link_delete(cmd);
|
|
if(ret != ESP_OK) return -1;
|
|
cmd = i2c_cmd_link_create();
|
|
i2c_master_start(cmd);
|
|
i2c_master_write_byte(cmd, ( slv_addr << 1 ) | READ_BIT, ACK_CHECK_EN);
|
|
i2c_master_read_byte(cmd, &data, NACK_VAL);
|
|
i2c_master_stop(cmd);
|
|
ret = i2c_master_cmd_begin(SCCB_I2C_PORT, cmd, 1000 / portTICK_RATE_MS);
|
|
i2c_cmd_link_delete(cmd);
|
|
if(ret != ESP_OK) {
|
|
ESP_LOGE(TAG, "W [%04x]=%02x fail\n", reg, data);
|
|
}
|
|
return data;
|
|
}
|
|
|
|
uint8_t SCCB_Write16(uint8_t slv_addr, uint16_t reg, uint8_t data)
|
|
{
|
|
static uint16_t i = 0;
|
|
esp_err_t ret = ESP_FAIL;
|
|
uint16_t reg_htons = LITTLETOBIG(reg);
|
|
uint8_t *reg_u8 = (uint8_t *)®_htons;
|
|
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
|
|
i2c_master_start(cmd);
|
|
i2c_master_write_byte(cmd, ( slv_addr << 1 ) | WRITE_BIT, ACK_CHECK_EN);
|
|
i2c_master_write_byte(cmd, reg_u8[0], ACK_CHECK_EN);
|
|
i2c_master_write_byte(cmd, reg_u8[1], ACK_CHECK_EN);
|
|
i2c_master_write_byte(cmd, data, ACK_CHECK_EN);
|
|
i2c_master_stop(cmd);
|
|
ret = i2c_master_cmd_begin(SCCB_I2C_PORT, cmd, 1000 / portTICK_RATE_MS);
|
|
i2c_cmd_link_delete(cmd);
|
|
if(ret != ESP_OK) {
|
|
ESP_LOGE(TAG, "W [%04x]=%02x %d fail\n", reg, data, i++);
|
|
}
|
|
return ret == ESP_OK ? 0 : -1;
|
|
}
|