Diff: flash.h

Revision:

0:e12eb40b9fef

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flash.h	Thu Apr 23 00:38:16 2020 +0000
@@ -0,0 +1,84 @@
+#ifndef _FLASH_H_
+#define _FLASH_H_
+
+// ST32F103RBT6 - FLASH : 128KB, SRAM : 20KB (Medium-density model) 
+// flash memory page : 127 (last page)
+// flash memory size : 1KB, unit : Word(4Byte)
+// 0x0801 FC00 - 0x0801 FFFF
+#define FLASH_START_ADDRESS ((uint32_t)0x0801FC00)
+#define FLASH_END_ADDRESS   ((uint32_t)0x0801FFFF)
+
+#define FLASH_START_ADDRESS2 ((uint32_t)0x0801F800)
+#define FLASH_END_ADDRESS2   ((uint32_t)0x0801FBFF)
+
+uint32_t flash_address_count = 0;
+
+bool Flash_Head_Check();
+void Erase_Flash();
+void Write_Flash(uint32_t data);
+uint32_t Read_Flash(uint32_t address);
+
+bool Flash_Head_Check()
+{
+    uint32_t flash_data[5];
+    for(uint32_t i = 0; i < 5; i++)
+    {
+        flash_data[i] = Read_Flash(i * 4);
+    }
+    
+    if  (  (char)flash_data[0] == 'F'
+        && (char)flash_data[1] == 'L'
+        && (char)flash_data[2] == 'A'
+        && (char)flash_data[3] == 'S'
+        && (char)flash_data[4] == 'H')
+    {
+        return true;
+    } 
+    else
+    {
+        return false;
+    }
+}
+
+
+void Erase_Flash()
+{
+    static FLASH_EraseInitTypeDef flash_struct;                 // Flash erase struct
+    uint32_t PageError = 0;                                     // Page error state
+    
+    flash_struct.TypeErase = FLASH_TYPEERASE_PAGES;             // Erase type : Page
+    flash_struct.PageAddress = FLASH_START_ADDRESS;             // Flash start address
+    flash_struct.NbPages = 1;                                   // Number of page
+
+    HAL_FLASH_Unlock();                                         // Flash control unlock
+    if(HAL_FLASHEx_Erase(&flash_struct, &PageError) != HAL_OK)  // Flash erase function & result, HAL_OK = true
+    {
+        //pc.printf("Flash erase error!\n\r");
+    }
+    HAL_FLASH_Lock();                                           // Flash control lock
+    flash_address_count = 0;                                    // Flash address count variable reset
+}
+
+
+void Write_Flash(uint32_t data)
+{
+    if(Read_Flash(flash_address_count * 4))
+    {
+        HAL_FLASH_Unlock();
+        HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, FLASH_START_ADDRESS + (flash_address_count * 4), data);        
+        HAL_FLASH_Lock();
+    }
+    flash_address_count++;
+}
+
+uint32_t Read_Flash(uint32_t address)
+{
+    uint32_t val = 0;
+    address = address + FLASH_START_ADDRESS;
+    val = *(__IO uint32_t*)address;
+    
+    return val;
+}
+
+
+#endif