Add fault modes and start implementation of backup SRAM. However, this will probably never be used

stm-firmware/include/stm-periph/backup-ram.h

@@ -0,0 +1,51 @@
+/* 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 <stdint.h>
+
+/**
+ * @brief Init the backup ram and make it accesible
+ */
+void backup_ram_init();
+
+/**
+ * @brief Disable access to the backup RAM. This saves power
+ */
+void backup_ram_disable();
+
+/**
+ * @brief Whis function overwrites the backup RAM with 0x00
+ */
+void backup_ram_wipe();
+
+/**
+ * @brief Read data from the backup RAM
+ * @param addr Address offset inside memory
+ * @param data read 32bit data
+ */
+int backup_ram_get_data(uint32_t addr, uint32_t *data);
+
+/**
+ * @brief Write data structure to backup RAM
+ * @param data
+ * @return
+ */
+int backup_ram_write_data(uint32_t addr, uint32_t data);
+