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authorMDC Service <michael.schmid@mdc-service.de>2022-05-25 13:07:19 +0200
committerGitHub <noreply@github.com>2022-05-25 13:07:19 +0200
commitddd05b2c7e4b5c9f95f913b5ca24be9edc5bd7bb (patch)
tree47bd8efdb41386734333bdc6f199901784f1915f /software/michi_funcs/sdcard_funcs.cpp
parent124d22828708d4d3d843addeeb62d049c1c05fc2 (diff)
replace files with copyright header and Doxygen comments
Diffstat (limited to 'software/michi_funcs/sdcard_funcs.cpp')
-rw-r--r--software/michi_funcs/sdcard_funcs.cpp153
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diff --git a/software/michi_funcs/sdcard_funcs.cpp b/software/michi_funcs/sdcard_funcs.cpp
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--- a/software/michi_funcs/sdcard_funcs.cpp
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-/* SD card and FAT filesystem 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.
-*/
-
-// This example uses SDMMC peripheral to communicate with SD card.
-
-#include <string.h>
-#include <sys/unistd.h>
-#include <sys/stat.h>
-#include "esp_vfs_fat.h"
-#include "sdmmc_cmd.h"
-#include "driver/sdmmc_host.h"
-
-static const char *TAG = "example";
-
-#define MOUNT_POINT "/sdcard"
-
-
-void test_sdcard(void)
-{
- esp_err_t ret;
-
- // Options for mounting the filesystem.
- // If format_if_mount_failed is set to true, SD card will be partitioned and
- // formatted in case when mounting fails.
- esp_vfs_fat_sdmmc_mount_config_t mount_config = {
-#ifdef CONFIG_EXAMPLE_FORMAT_IF_MOUNT_FAILED
- .format_if_mount_failed = true,
-#else
- .format_if_mount_failed = false,
-#endif // EXAMPLE_FORMAT_IF_MOUNT_FAILED
- .max_files = 5,
- .allocation_unit_size = 16 * 1024
- };
- sdmmc_card_t *card;
- const char mount_point[] = MOUNT_POINT;
- ESP_LOGI(TAG, "Initializing SD card");
-
- // Use settings defined above to initialize SD card and mount FAT filesystem.
- // Note: esp_vfs_fat_sdmmc/sdspi_mount is all-in-one convenience functions.
- // Please check its source code and implement error recovery when developing
- // production applications.
-
- ESP_LOGI(TAG, "Using SDMMC peripheral");
- sdmmc_host_t host = SDMMC_HOST_DEFAULT();
-
- // This initializes the slot without card detect (CD) and write protect (WP) signals.
- // Modify slot_config.gpio_cd and slot_config.gpio_wp if your board has these signals.
- sdmmc_slot_config_t slot_config = SDMMC_SLOT_CONFIG_DEFAULT();
-
- // Set bus width to use:
-#ifdef CONFIG_EXAMPLE_SDMMC_BUS_WIDTH_4
- slot_config.width = 4;
-#else
- slot_config.width = 1;
-#endif
-
- // On chips where the GPIOs used for SD card can be configured, set them in
- // the slot_config structure:
-#ifdef CONFIG_SOC_SDMMC_USE_GPIO_MATRIX
- slot_config.clk = CONFIG_EXAMPLE_PIN_CLK;
- slot_config.cmd = CONFIG_EXAMPLE_PIN_CMD;
- slot_config.d0 = CONFIG_EXAMPLE_PIN_D0;
-#ifdef CONFIG_EXAMPLE_SDMMC_BUS_WIDTH_4
- slot_config.d1 = CONFIG_EXAMPLE_PIN_D1;
- slot_config.d2 = CONFIG_EXAMPLE_PIN_D2;
- slot_config.d3 = CONFIG_EXAMPLE_PIN_D3;
-#endif // CONFIG_EXAMPLE_SDMMC_BUS_WIDTH_4
-#endif // CONFIG_SOC_SDMMC_USE_GPIO_MATRIX
-
- // Enable internal pullups on enabled pins. The internal pullups
- // are insufficient however, please make sure 10k external pullups are
- // connected on the bus. This is for debug / example purpose only.
- slot_config.flags |= SDMMC_SLOT_FLAG_INTERNAL_PULLUP;
-
- ESP_LOGI(TAG, "Mounting filesystem");
- ret = esp_vfs_fat_sdmmc_mount(mount_point, &host, &slot_config, &mount_config, &card);
-
- if (ret != ESP_OK) {
- if (ret == ESP_FAIL) {
- ESP_LOGE(TAG, "Failed to mount filesystem. "
- "If you want the card to be formatted, set the EXAMPLE_FORMAT_IF_MOUNT_FAILED menuconfig option.");
- } else {
- ESP_LOGE(TAG, "Failed to initialize the card (%s). "
- "Make sure SD card lines have pull-up resistors in place.", esp_err_to_name(ret));
- }
- return;
- }
- ESP_LOGI(TAG, "Filesystem mounted");
-
- // Card has been initialized, print its properties
- sdmmc_card_print_info(stdout, card);
-
- // Use POSIX and C standard library functions to work with files:
-
- // First create a file.
- const char *file_hello = MOUNT_POINT"/hello.txt";
-
- ESP_LOGI(TAG, "Opening file %s", file_hello);
- FILE *f = fopen(file_hello, "w");
- if (f == NULL) {
- ESP_LOGE(TAG, "Failed to open file for writing");
- return;
- }
- fprintf(f, "Hello %s!\n", card->cid.name);
- fclose(f);
- ESP_LOGI(TAG, "File written");
-
- const char *file_foo = MOUNT_POINT"/foo.txt";
-
- // Check if destination file exists before renaming
- struct stat st;
- if (stat(file_foo, &st) == 0) {
- // Delete it if it exists
- unlink(file_foo);
- }
-
- // Rename original file
- ESP_LOGI(TAG, "Renaming file %s to %s", file_hello, file_foo);
- if (rename(file_hello, file_foo) != 0) {
- ESP_LOGE(TAG, "Rename failed");
- return;
- }
-
- // Open renamed file for reading
- ESP_LOGI(TAG, "Reading file %s", file_foo);
- f = fopen(file_foo, "r");
- if (f == NULL) {
- ESP_LOGE(TAG, "Failed to open file for reading");
- return;
- }
-
- // Read a line from file
- char line[64];
- fgets(line, sizeof(line), f);
- fclose(f);
-
- // Strip newline
- char *pos = strchr(line, '\n');
- if (pos) {
- *pos = '\0';
- }
- ESP_LOGI(TAG, "Read from file: '%s'", line);
-
- // All done, unmount partition and disable SDMMC peripheral
- esp_vfs_fat_sdcard_unmount(mount_point, card);
- ESP_LOGI(TAG, "Card unmounted");
-}
-