117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/* Reflow Oven Controller
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*
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* Copyright (C) 2020 Mario Hüttel <mario.huettel@gmx.net>
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*
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* This file is part of the Reflow Oven Controller Project.
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*
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* The reflow oven controller is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* The Reflow Oven Control Firmware is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the reflow oven controller project.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <reflow-controller/settings/settings-sd-card.h>
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#include <stm-periph/unique-id.h>
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#include <toml/toml.h>
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#include <fatfs/ff.h>
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static void get_controller_folder_path(char *path, size_t size)
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{
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uint32_t high;
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uint32_t mid;
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uint32_t low;
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if (!path)
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return;
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unique_id_get(&high, &mid, &low);
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snprintf(path, size, "/%08X-%08X-%08X",
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(unsigned int)high, (unsigned int)mid, (unsigned int)low);
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}
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/**
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* @brief Open or create the controller folder on the SD Card.
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* @param[in,out] controller_folder
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* @return 0 if opened, 1 if created and opened, -1 if error.
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*/
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static int create_controller_folder(void)
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{
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char foldername[48];
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int ret = -1;
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FRESULT filesystem_result;
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DIR folder;
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get_controller_folder_path(foldername, sizeof(foldername));
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/* Check if folder is present */
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filesystem_result = f_opendir(&folder, foldername);
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if (filesystem_result == FR_OK) {
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ret = 0;
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f_closedir(&folder);
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} else {
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filesystem_result = f_mkdir(foldername);
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if (filesystem_result == FR_OK) {
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f_closedir(&folder);
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ret = 1;
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} else {
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ret = -1;
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}
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}
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if (ret >= 0)
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f_chdir(foldername);
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return ret;
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}
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int sd_card_settings_save_calibration(float sens_deviation, float offset, bool active)
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{
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FIL cal_file;
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int status;
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FRESULT res;
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UINT bw;
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int ret = 0;
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char buff[256];
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status = create_controller_folder();
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if (status < 0)
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return -2;
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/* Create new calibration file */
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res = f_open(&cal_file, CALIBRATION_FILE_NAME, FA_CREATE_ALWAYS | FA_WRITE);
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if (res == FR_OK) {
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status = snprintf(buff, sizeof(buff), "[cal]\noffset = %f\nsensdev = %f\nactive = %s\n",
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offset, sens_deviation, (active ? "true" : "false"));
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if ((unsigned int)status < sizeof(buff) && status >= 0) {
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f_write(&cal_file, buff, status, &bw);
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if (bw == (unsigned int)status)
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ret = 0;
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else
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ret = -3;
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} else {
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ret = -4;
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}
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f_close(&cal_file);
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} else {
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ret = -1;
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}
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f_chdir("/");
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return ret;
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}
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