wip

workspace/AUTOM10/Core/Src/eeprom.h

@@ -0,0 +1,88 @@
+/*
+ * eeprom.h
+ *
+ *  Created on: Dec 7, 2025
+ *      Author: user
+ */
+
+#ifndef __EEPROM_H
+#define __EEPROM_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "stm32f1xx_hal.h"
+
+/*
+ * Simple EEPROM emulation for STM32F103C8T6 (medium density).
+ * - Uses 2 Flash pages (1 kB each) at the end of Flash.
+ * - Stores variables as 16-bit values identified by 16-bit "virtual addresses".
+ *
+ * You must define the list of virtual addresses in eeprom.c: EE_VirtAddrs[].
+ */
+
+typedef enum
+{
+    EE_OK = 0,
+    EE_ERROR,
+    EE_NOT_FOUND,
+    EE_NO_SPACE
+} EE_Status;
+
+/* Flash parameters for STM32F103C8T6 */
+#define EE_FLASH_BASE_ADDR     0x08000000U
+#define EE_PAGE_SIZE           0x400U      /* 1 kB pages */
+
+/*
+ * Here we assume a 64 kB Flash device (STM32F103C8T6):
+ * Flash range: 0x0800 0000 - 0x0800 FFFF
+ * Pages: 0..63 (64 pages)
+ * We use the last 2 pages for EEPROM:
+ *  - Page 62: 0x0800 F800
+ *  - Page 63: 0x0800 FC00
+ */
+#define EE_PAGE0_BASE          (EE_FLASH_BASE_ADDR + (62U * EE_PAGE_SIZE))
+#define EE_PAGE1_BASE          (EE_FLASH_BASE_ADDR + (63U * EE_PAGE_SIZE))
+
+/* Page status markers (stored in the first halfword of each page) */
+#define EE_PAGE_STATUS_ERASED  0xFFFFU
+#define EE_PAGE_STATUS_VALID   0xAAAAU
+#define EE_PAGE_STATUS_RECEIVE 0x5555U
+
+/*
+ * Configure how many virtual variables you have.
+ * Example: bytes, words, and array elements mapped to 16-bit variables.
+ * Set EE_NUM_VIRTUAL_ADDR and define EE_VirtAddrs[] in eeprom.c.
+ */
+/* 32 virtual variables, sequential addresses */
+#define EE_NUM_VIRTUAL_ADDR    32U
+#define EEW_ADDR(i)            (uint16_t)(0x0001 + (i))   // i = 0..31
+
+
+
+
+/* Virtual address table (defined in eeprom.c, can be customized) */
+extern const uint16_t EE_VirtAddrs[EE_NUM_VIRTUAL_ADDR];
+
+/* Public API */
+EE_Status EE_Init(void);
+EE_Status EE_ReadVariable(uint16_t VirtAddress, uint16_t *Data);
+EE_Status EE_WriteVariable(uint16_t VirtAddress, uint16_t Data);
+
+/* Pseudo-array accessor */
+static inline EE_Status EEW_Read(uint8_t idx, uint16_t *value)
+{
+    return EE_ReadVariable(EEW_ADDR(idx), value);
+}
+
+static inline EE_Status EEW_Write(uint8_t idx, uint16_t value)
+{
+    return EE_WriteVariable(EEW_ADDR(idx), value);
+}
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __EEPROM_H */
+