kopia lustrzana https://github.com/espressif/esp-idf
72 wiersze
1.9 KiB
C
72 wiersze
1.9 KiB
C
/*
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* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Unlicense OR CC0-1.0
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*/
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#include <string.h>
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#include <stdio.h>
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#include "sdkconfig.h"
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#include "esp_log.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "driver/i2c_master.h"
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#include "i2c_eeprom.h"
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#define SCL_IO_PIN CONFIG_I2C_MASTER_SCL
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#define SDA_IO_PIN CONFIG_I2C_MASTER_SDA
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#define MASTER_FREQUENCY CONFIG_I2C_MASTER_FREQUENCY
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#define PORT_NUMBER -1
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#define LENGTH 48
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static void disp_buf(uint8_t *buf, int len)
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{
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int i;
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for (i = 0; i < len; i++) {
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printf("%02x ", buf[i]);
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if ((i + 1) % 16 == 0) {
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printf("\n");
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}
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}
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printf("\n");
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}
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void app_main(void)
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{
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i2c_master_bus_config_t i2c_bus_config = {
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.clk_source = I2C_CLK_SRC_DEFAULT,
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.i2c_port = PORT_NUMBER,
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.scl_io_num = SCL_IO_PIN,
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.sda_io_num = SDA_IO_PIN,
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.glitch_ignore_cnt = 7,
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};
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i2c_master_bus_handle_t bus_handle;
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ESP_ERROR_CHECK(i2c_new_master_bus(&i2c_bus_config, &bus_handle));
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i2c_eeprom_config_t eeprom_config = {
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.eeprom_device.scl_speed_hz = MASTER_FREQUENCY,
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.eeprom_device.device_address = 0x50,
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.addr_wordlen = 2,
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.write_time_ms = 10,
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};
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i2c_eeprom_handle_t eeprom_handle;
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uint32_t block_addr = 0x0010;
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uint8_t buf[LENGTH];
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for (int i = 0; i < LENGTH; i++) {
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buf[i] = i;
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}
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uint8_t read_buf[LENGTH];
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ESP_ERROR_CHECK(i2c_eeprom_init(bus_handle, &eeprom_config, &eeprom_handle));
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while (1) {
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ESP_ERROR_CHECK(i2c_eeprom_write(eeprom_handle, block_addr, buf, LENGTH));
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// Needs wait for eeprom hardware done, referring from datasheet
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i2c_eeprom_wait_idle(eeprom_handle);
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ESP_ERROR_CHECK(i2c_eeprom_read(eeprom_handle, block_addr, read_buf, LENGTH));
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disp_buf(read_buf, LENGTH);
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vTaskDelay(50);
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}
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}
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