reflow-oven-control-sw/stm-firmware/settings/settings-sd-card.c

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2020-04-26 20:21:13 +02:00
/* Reflow Oven Controller
*
* Copyright (C) 2020 Mario Hüttel <mario.huettel@gmx.net>
*
* This file is part of the Reflow Oven Controller Project.
*
* The reflow oven controller is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* The Reflow Oven Control Firmware is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the reflow oven controller project.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <reflow-controller/settings/settings-sd-card.h>
#include <stm-periph/unique-id.h>
#include <toml/toml.h>
#include <fatfs/ff.h>
static void get_controller_folder_path(char *path, size_t size)
{
uint32_t high;
uint32_t mid;
uint32_t low;
if (!path)
return;
unique_id_get(&high, &mid, &low);
snprintf(path, size, "/%08X-%08X-%08X",
(unsigned int)high, (unsigned int)mid, (unsigned int)low);
}
/**
* @brief Open or create the controller folder on the SD Card.
* @param[in,out] controller_folder
* @return 0 if opened, 1 if created and opened, -1 if error.
*/
static int open_or_create_controller_folder(DIR *controller_folder)
{
char foldername[48];
int ret = -1;
FRESULT filesystem_result;
if (!controller_folder)
return -1001;
get_controller_folder_path(foldername, sizeof(foldername));
/* Check if folder is present */
filesystem_result = f_opendir(controller_folder, foldername);
if (filesystem_result == FR_OK) {
ret = 0;
} else {
filesystem_result = f_mkdir(foldername);
if (filesystem_result == FR_OK) {
filesystem_result = f_opendir(controller_folder, foldername);
if (filesystem_result == FR_OK)
ret = 1;
else
ret = -1;
} else {
ret = -1;
}
}
if (ret >= 0)
f_chdir(foldername);
return ret;
}
int sd_card_settings_save_calibration(float sens_deviation, float offset)
{
DIR folder;
FIL cal_file;
int status;
FRESULT res;
UINT bw;
int ret = 0;
status = open_or_create_controller_folder(&folder);
f_closedir(&folder);
if (status < 0)
return -2;
/* Create new calibration file */
res = f_open(&cal_file, CALIBRATION_FILE_NAME, FA_CREATE_ALWAYS | FA_WRITE);
if (res == FR_OK) {
f_write(&cal_file, "Test", 4U, &bw);
f_close(&cal_file);
ret = 0;
} else {
ret = -1;
}
f_chdir("/");
return ret;
}