implement EEPROM emulation

Core/Src/app_main.c

@@ -19,6 +19,7 @@
 #include "app_buzzer.h"
 #include "app_heater.h"
 #include "cmsis_os2.h"
+#include "eeprom_emul.h"
 
 static struct App {
   float oven_temp;
@@ -84,6 +85,28 @@ static void redraw_display() {
 void app_task_main(void *argument)
 {
     PUTS("Main task\r\n");
+
+    /* test the persistent storage */
+    EE_Init(EE_CONDITIONAL_ERASE);
+
+    uint32_t cnt = 0;
+    EE_Status eest = EE_ReadVariable32bits(1, &cnt);
+
+    PRINTF("EE rd status %d, cnt %d\r\n", eest, cnt);
+
+    cnt++;
+
+    eest = EE_WriteVariable32bits(1, cnt);
+    PRINTF("EE wr status %d\r\n", eest);
+    if (eest == EE_CLEANUP_REQUIRED) {
+        eest = EE_CleanUp();
+        PRINTF("EE cleanup status %d\r\n", eest);
+    }
+
+
+
+
+
     app_analog_init();
     app_buzzer_init();
     app_knob_init();

Core/Src/crc.c

@@ -0,0 +1,49 @@
+/* USER CODE BEGIN Header */
+/**
+  ******************************************************************************
+  * @file    crc.c
+  * @brief   This file provides code for the configuration
+  *          of the CRC instances.
+  ******************************************************************************
+  * @attention
+  *
+  * Copyright (c) 2023 STMicroelectronics.
+  * All rights reserved.
+  *
+  * This software is licensed under terms that can be found in the LICENSE file
+  * in the root directory of this software component.
+  * If no LICENSE file comes with this software, it is provided AS-IS.
+  *
+  ******************************************************************************
+  */
+/* USER CODE END Header */
+/* Includes ------------------------------------------------------------------*/
+#include "crc.h"
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/* CRC init function */
+void MX_CRC_Init(void)
+{
+
+  /* USER CODE BEGIN CRC_Init 0 */
+
+  /* USER CODE END CRC_Init 0 */
+
+  /* Peripheral clock enable */
+  LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_CRC);
+
+  /* USER CODE BEGIN CRC_Init 1 */
+
+  /* USER CODE END CRC_Init 1 */
+  /* USER CODE BEGIN CRC_Init 2 */
+
+  /* USER CODE END CRC_Init 2 */
+
+}
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */

Core/Src/main.c

@@ -20,6 +20,7 @@
 #include "main.h"
 #include "cmsis_os.h"
 #include "adc.h"
+#include "crc.h"
 #include "dma.h"
 #include "iwdg.h"
 #include "spi.h"
@@ -119,6 +120,7 @@ int main(void)
   MX_TIM3_Init();
   MX_SPI2_Init();
   MX_TIM1_Init();
+  MX_CRC_Init();
   /* USER CODE BEGIN 2 */
 
   PUTS("Start.\r\n");

Core/Src/stm32f1xx_it.c

@@ -62,6 +62,8 @@
 
 /* USER CODE BEGIN EV */
 
+bool EE_NMI_Callback();
+
 /* USER CODE END EV */
 
 /******************************************************************************/
@@ -74,6 +76,10 @@ void NMI_Handler(void)
 {
   /* USER CODE BEGIN NonMaskableInt_IRQn 0 */
 
+  if (EE_NMI_Callback()) {
+      return;
+  }
+
   /* USER CODE END NonMaskableInt_IRQn 0 */
   /* USER CODE BEGIN NonMaskableInt_IRQn 1 */
   while (1)