hd_eeprom sample
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Outline
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/spi_master.h"
#include "driver/gpio.h"
#include "sdkconfig.h"
#include "esp_log.h"
#include "spi_eeprom.h"
TAG
app_main()
Files
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SourceVuESP-IDF Framework and Exampleshd_eeprom samplemain/spi_eeprom_main.c
 
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/* SPI Master Half Duplex EEPROM example. This example code is in the Public Domain (or CC0 licensed, at your option.) Unless required by applicable law or agreed to in writing, this software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *//* ... */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include "freertos/FreeRTOS.h" #include "freertos/task.h" #include "driver/spi_master.h" #include "driver/gpio.h" #include "sdkconfig.h" #include "esp_log.h" #include "spi_eeprom.h"10 includes /* This code demonstrates how to use the SPI master half duplex mode to read/write a AT932C46D EEPROM (8-bit mode). *//* ... */ ////////////////////////////////////////////////////////////////////////////////////////////////////////// ////////////// Please update the following configuration according to your HardWare spec ///////////////// ////////////////////////////////////////////////////////////////////////////////////////////////////////// #if CONFIG_IDF_TARGET_ESP32 # if CONFIG_EXAMPLE_USE_SPI1_PINS # define EEPROM_HOST SPI1_HOST // Use default pins, same as the flash chip. # define PIN_NUM_MISO 7 # define PIN_NUM_MOSI 8 # define PIN_NUM_CLK 6/* ... */ # else # define EEPROM_HOST HSPI_HOST # define PIN_NUM_MISO 18 # define PIN_NUM_MOSI 23 # define PIN_NUM_CLK 19/* ... */ # endif # define PIN_NUM_CS 13/* ... */ #else # define EEPROM_HOST SPI2_HOST # define PIN_NUM_MISO 13 # define PIN_NUM_MOSI 12 # define PIN_NUM_CLK 11 # define PIN_NUM_CS 10/* ... */ #endif static const char TAG[] = "main"; void app_main(void) { esp_err_t ret; #ifndef CONFIG_EXAMPLE_USE_SPI1_PINS ESP_LOGI(TAG, "Initializing bus SPI%d...", EEPROM_HOST + 1); spi_bus_config_t buscfg = { .miso_io_num = PIN_NUM_MISO, .mosi_io_num = PIN_NUM_MOSI, .sclk_io_num = PIN_NUM_CLK, .quadwp_io_num = -1, .quadhd_io_num = -1, .max_transfer_sz = 32, }{...}; //Initialize the SPI bus ret = spi_bus_initialize(EEPROM_HOST, &buscfg, SPI_DMA_CH_AUTO); ESP_ERROR_CHECK(ret);/* ... */ #else ESP_LOGI(TAG, "Attach to main flash bus..."); #endif eeprom_config_t eeprom_config = { .cs_io = PIN_NUM_CS, .host = EEPROM_HOST, .miso_io = PIN_NUM_MISO, }{...}; #ifdef CONFIG_EXAMPLE_INTR_USED eeprom_config.intr_used = true; gpio_install_isr_service(0);/* ... */ #endif eeprom_handle_t eeprom_handle; ESP_LOGI(TAG, "Initializing device..."); ret = spi_eeprom_init(&eeprom_config, &eeprom_handle); ESP_ERROR_CHECK(ret); ret = spi_eeprom_write_enable(eeprom_handle); ESP_ERROR_CHECK(ret); const char test_str[] = "Hello World!"; ESP_LOGI(TAG, "Write: %s", test_str); for (int i = 0; i < sizeof(test_str); i++) { // No need for this EEPROM to erase before write. ret = spi_eeprom_write(eeprom_handle, i, test_str[i]); ESP_ERROR_CHECK(ret); }{...} uint8_t test_buf[32] = ""; for (int i = 0; i < sizeof(test_str); i++) { ret = spi_eeprom_read(eeprom_handle, i, &test_buf[i]); ESP_ERROR_CHECK(ret); }{...} ESP_LOGI(TAG, "Read: %s", test_buf); ESP_LOGI(TAG, "Example finished."); while (1) { // Add your main loop handling code here. vTaskDelay(100); }{...} }{ ... }
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