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261 lines
7.9 KiB
261 lines
7.9 KiB
/*
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* This file is part of the OpenMV project.
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* Copyright (c) 2013/2014 Ibrahim Abdelkader <i.abdalkader@gmail.com>
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* This work is licensed under the MIT license, see the file LICENSE for details.
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*
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* SCCB (I2C like) driver.
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*
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*/
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#include <stdbool.h>
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#include <freertos/FreeRTOS.h>
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#include <freertos/task.h>
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#include "sccb.h"
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#include <stdio.h>
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#include "sdkconfig.h"
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#if defined(ARDUINO_ARCH_ESP32) && defined(CONFIG_ARDUHAL_ESP_LOG)
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#include "esp32-hal-log.h"
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#else
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#include "esp_log.h"
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static const char* TAG = "sccb";
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#endif
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//#undef CONFIG_SCCB_HARDWARE_I2C
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#define LITTLETOBIG(x) ((x<<8)|(x>>8))
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#ifdef CONFIG_SCCB_HARDWARE_I2C
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#include "driver/i2c.h"
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#define SCCB_FREQ 100000 /*!< I2C master frequency*/
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#define WRITE_BIT I2C_MASTER_WRITE /*!< I2C master write */
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#define READ_BIT I2C_MASTER_READ /*!< I2C master read */
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#define ACK_CHECK_EN 0x1 /*!< I2C master will check ack from slave*/
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#define ACK_CHECK_DIS 0x0 /*!< I2C master will not check ack from slave */
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#define ACK_VAL 0x0 /*!< I2C ack value */
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#define NACK_VAL 0x1 /*!< I2C nack value */
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#if CONFIG_SCCB_HARDWARE_I2C_PORT1
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const int SCCB_I2C_PORT = 1;
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#else
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const int SCCB_I2C_PORT = 0;
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#endif
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static uint8_t ESP_SLAVE_ADDR = 0x3c;
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#else
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#include "twi.h"
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#endif
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int SCCB_Init(int pin_sda, int pin_scl)
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{
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ESP_LOGI(TAG, "pin_sda %d pin_scl %d\n", pin_sda, pin_scl);
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#ifdef CONFIG_SCCB_HARDWARE_I2C
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//log_i("SCCB_Init start");
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i2c_config_t conf;
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conf.mode = I2C_MODE_MASTER;
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conf.sda_io_num = pin_sda;
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conf.sda_pullup_en = GPIO_PULLUP_ENABLE;
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conf.scl_io_num = pin_scl;
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conf.scl_pullup_en = GPIO_PULLUP_ENABLE;
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conf.master.clk_speed = SCCB_FREQ;
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i2c_param_config(SCCB_I2C_PORT, &conf);
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i2c_driver_install(SCCB_I2C_PORT, conf.mode, 0, 0, 0);
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#else
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twi_init(pin_sda, pin_scl);
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#endif
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return 0;
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}
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uint8_t SCCB_Probe()
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{
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#ifdef CONFIG_SCCB_HARDWARE_I2C
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uint8_t slave_addr = 0x0;
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while(slave_addr < 0x7f) {
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i2c_cmd_handle_t cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, ( slave_addr << 1 ) | WRITE_BIT, ACK_CHECK_EN);
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i2c_master_stop(cmd);
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esp_err_t ret = i2c_master_cmd_begin(SCCB_I2C_PORT, cmd, 1000 / portTICK_RATE_MS);
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i2c_cmd_link_delete(cmd);
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if( ret == ESP_OK) {
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ESP_SLAVE_ADDR = slave_addr;
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return ESP_SLAVE_ADDR;
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}
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slave_addr++;
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}
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return ESP_SLAVE_ADDR;
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#else
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uint8_t reg = 0x00;
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uint8_t slv_addr = 0x00;
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ESP_LOGI(TAG, "SCCB_Probe start");
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for (uint8_t i = 0; i < 127; i++) {
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if (twi_writeTo(i, ®, 1, true) == 0) {
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slv_addr = i;
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break;
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}
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if (i!=126) {
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vTaskDelay(10 / portTICK_PERIOD_MS); // Necessary for OV7725 camera (not for OV2640).
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}
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}
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return slv_addr;
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#endif
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}
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uint8_t SCCB_Read(uint8_t slv_addr, uint8_t reg)
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{
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#ifdef CONFIG_SCCB_HARDWARE_I2C
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uint8_t data=0;
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esp_err_t ret = ESP_FAIL;
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i2c_cmd_handle_t cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, ( slv_addr << 1 ) | WRITE_BIT, ACK_CHECK_EN);
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i2c_master_write_byte(cmd, reg, ACK_CHECK_EN);
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i2c_master_stop(cmd);
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ret = i2c_master_cmd_begin(SCCB_I2C_PORT, cmd, 1000 / portTICK_RATE_MS);
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i2c_cmd_link_delete(cmd);
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if(ret != ESP_OK) return -1;
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cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, ( slv_addr << 1 ) | READ_BIT, ACK_CHECK_EN);
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i2c_master_read_byte(cmd, &data, NACK_VAL);
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i2c_master_stop(cmd);
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ret = i2c_master_cmd_begin(SCCB_I2C_PORT, cmd, 1000 / portTICK_RATE_MS);
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i2c_cmd_link_delete(cmd);
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if(ret != ESP_OK) {
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ESP_LOGE(TAG, "SCCB_Read Failed addr:0x%02x, reg:0x%02x, data:0x%02x, ret:%d", slv_addr, reg, data, ret);
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}
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return data;
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#else
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uint8_t data=0;
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int rc = twi_writeTo(slv_addr, ®, 1, true);
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if (rc != 0) {
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data = 0xff;
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} else {
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rc = twi_readFrom(slv_addr, &data, 1, true);
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if (rc != 0) {
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data=0xFF;
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}
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}
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if (rc != 0) {
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ESP_LOGE(TAG, "SCCB_Read [%02x] failed rc=%d\n", reg, rc);
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}
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return data;
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#endif
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}
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uint8_t SCCB_Write(uint8_t slv_addr, uint8_t reg, uint8_t data)
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{
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#ifdef CONFIG_SCCB_HARDWARE_I2C
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esp_err_t ret = ESP_FAIL;
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i2c_cmd_handle_t cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, ( slv_addr << 1 ) | WRITE_BIT, ACK_CHECK_EN);
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i2c_master_write_byte(cmd, reg, ACK_CHECK_EN);
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i2c_master_write_byte(cmd, data, ACK_CHECK_EN);
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i2c_master_stop(cmd);
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ret = i2c_master_cmd_begin(SCCB_I2C_PORT, cmd, 1000 / portTICK_RATE_MS);
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i2c_cmd_link_delete(cmd);
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if(ret != ESP_OK) {
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ESP_LOGE(TAG, "SCCB_Write Failed addr:0x%02x, reg:0x%02x, data:0x%02x, ret:%d", slv_addr, reg, data, ret);
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}
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return ret == ESP_OK ? 0 : -1;
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#else
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uint8_t ret=0;
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uint8_t buf[] = {reg, data};
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if(twi_writeTo(slv_addr, buf, 2, true) != 0) {
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ret=0xFF;
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}
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if (ret != 0) {
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ESP_LOGE(TAG, "SCCB_Write [%02x]=%02x failed\n", reg, data);
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}
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return ret;
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#endif
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}
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uint8_t SCCB_Read16(uint8_t slv_addr, uint16_t reg)
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{
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#ifdef CONFIG_SCCB_HARDWARE_I2C
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uint8_t data=0;
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esp_err_t ret = ESP_FAIL;
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uint16_t reg_htons = LITTLETOBIG(reg);
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uint8_t *reg_u8 = (uint8_t *)®_htons;
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i2c_cmd_handle_t cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, ( slv_addr << 1 ) | WRITE_BIT, ACK_CHECK_EN);
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i2c_master_write_byte(cmd, reg_u8[0], ACK_CHECK_EN);
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i2c_master_write_byte(cmd, reg_u8[1], ACK_CHECK_EN);
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i2c_master_stop(cmd);
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ret = i2c_master_cmd_begin(SCCB_I2C_PORT, cmd, 1000 / portTICK_RATE_MS);
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i2c_cmd_link_delete(cmd);
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if(ret != ESP_OK) return -1;
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cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, ( slv_addr << 1 ) | READ_BIT, ACK_CHECK_EN);
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i2c_master_read_byte(cmd, &data, NACK_VAL);
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i2c_master_stop(cmd);
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ret = i2c_master_cmd_begin(SCCB_I2C_PORT, cmd, 1000 / portTICK_RATE_MS);
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i2c_cmd_link_delete(cmd);
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if(ret != ESP_OK) {
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ESP_LOGE(TAG, "W [%04x]=%02x fail\n", reg, data);
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}
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return data;
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#else
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uint8_t data=0;
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uint16_t reg_htons = LITTLETOBIG(reg);
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uint8_t *reg_u8 = (uint8_t *)®_htons;
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uint8_t buf[] = {reg_u8[0], reg_u8[1]};
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int rc = twi_writeTo(slv_addr, buf, 2, true);
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if (rc != 0) {
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data = 0xff;
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} else {
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rc = twi_readFrom(slv_addr, &data, 1, true);
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if (rc != 0) {
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data=0xFF;
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}
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}
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if (rc != 0) {
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ESP_LOGE(TAG, "R [%04x] fail rc=%d\n", reg, rc);
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}
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return data;
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#endif
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}
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uint8_t SCCB_Write16(uint8_t slv_addr, uint16_t reg, uint8_t data)
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{
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static uint16_t i = 0;
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#ifdef CONFIG_SCCB_HARDWARE_I2C
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esp_err_t ret = ESP_FAIL;
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uint16_t reg_htons = LITTLETOBIG(reg);
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uint8_t *reg_u8 = (uint8_t *)®_htons;
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i2c_cmd_handle_t cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, ( slv_addr << 1 ) | WRITE_BIT, ACK_CHECK_EN);
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i2c_master_write_byte(cmd, reg_u8[0], ACK_CHECK_EN);
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i2c_master_write_byte(cmd, reg_u8[1], ACK_CHECK_EN);
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i2c_master_write_byte(cmd, data, ACK_CHECK_EN);
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i2c_master_stop(cmd);
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ret = i2c_master_cmd_begin(SCCB_I2C_PORT, cmd, 1000 / portTICK_RATE_MS);
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i2c_cmd_link_delete(cmd);
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if(ret != ESP_OK) {
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ESP_LOGE(TAG, "W [%04x]=%02x %d fail\n", reg, data, i++);
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}
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return ret == ESP_OK ? 0 : -1;
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#else
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uint8_t ret=0;
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uint16_t reg_htons = LITTLETOBIG(reg);
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uint8_t *reg_u8 = (uint8_t *)®_htons;
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uint8_t buf[] = {reg_u8[0], reg_u8[1], data};
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if(twi_writeTo(slv_addr, buf, 3, true) != 0) {
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ret = 0xFF;
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}
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if (ret != 0) {
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ESP_LOGE(TAG, "W [%04x]=%02x %d fail\n", reg, data, i++);
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}
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return ret;
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#endif
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}
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