Nothing Special
simple test EEPROM emulation for STM32F401 (STM algorithm described in the application notes: AN4061, AN3969, AN2594, AN3390, AN4056).
https://developer.mbed.org/questions/69101/Is-there-a-way-to-store-variables-in-a-n/#answer10369?compage=1#c24579
Versions for microcontrollers with smaller flash pages (using several flash pages for each virtual page):
Import program00_eeprom_emulation_f030
EEPROM emulation (STM algorithm described in the application notes: AN4061, AN3969, AN2594, AN3390, AN4056) with added multipage possibility. For Nucleo-F030 and others boards with similar microcontrolers.
Last commit 24 Sep 2016 by 
Nothing Special
Import program00_eeprom_emulation_f091
simple test EEPROM emulation (STM algorithm described in the application notes: AN4061, AN3969, AN2594, AN3390, AN4056) for STM32F091
Last commit 23 Sep 2016 by Nothing Special
Revision 1:bc0ee9ad46aa, committed 2016-09-27
- Comitter:
- mega64
- Date:
- Tue Sep 27 20:36:44 2016 +0000
- Parent:
- 0:1756c3542c95
- Commit message:
- bug fix in EE_VerifyPageFullyErased
Changed in this revision
| eeprom/eeprom.cpp | Show annotated file Show diff for this revision Revisions of this file |
diff -r 1756c3542c95 -r bc0ee9ad46aa eeprom/eeprom.cpp
--- a/eeprom/eeprom.cpp Thu Sep 22 03:54:18 2016 +0000
+++ b/eeprom/eeprom.cpp Tue Sep 27 20:36:44 2016 +0000
@@ -47,9 +47,10 @@
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
-/* Dummy variable to protect eeprom pages if code size is bigger than 32kb (F401)
+/* Dummy variables to protect eeprom pages if code size is bigger than 32kb (F401)
needed in Mbed online compiler to avoid conflict with linker (N.S.) */
-const uint8_t Eeprom_area[2 * PAGE_SIZE] __attribute__((at(EEPROM_START_ADDRESS),used))={ [0 ... (2 * PAGE_SIZE-1)] = 0xFF };
+const uint8_t Eeprom_area0[PAGE_SIZE] __attribute__((at(PAGE0_BASE_ADDRESS),used))={ [0 ... (PAGE_SIZE-1)] = 0xFF };
+const uint8_t Eeprom_area1[PAGE_SIZE] __attribute__((at(PAGE1_BASE_ADDRESS),used))={ [0 ... (PAGE_SIZE-1)] = 0xFF };
/* Global variable used to store variable value in read sequence */
@@ -328,21 +329,32 @@
*/
uint16_t EE_VerifyPageFullyErased(uint32_t Address)
{
- uint32_t ReadStatus = 1;
- uint16_t AddressValue = 0x5555;
+ uint32_t readstatus = 1;
+ uint16_t addressvalue = 0x5555;
+ uint32_t end_address;
+
+ if (PAGE0_BASE_ADDRESS==Address)
+ {
+ end_address = PAGE0_END_ADDRESS;
+ }
+ else
+ {
+ end_address = PAGE1_END_ADDRESS;
+ };
+
/* Check each active page address starting from end */
- while (Address <= PAGE0_END_ADDRESS)
+ while (Address <= end_address)
{
/* Get the current location content to be compared with virtual address */
- AddressValue = (*(__IO uint16_t*)Address);
+ addressvalue = (*(__IO uint16_t*)Address);
/* Compare the read address with the virtual address */
- if (AddressValue != ERASED)
+ if (addressvalue != ERASED)
{
- /* In case variable value is read, reset ReadStatus flag */
- ReadStatus = 0;
+ /* In case variable value is read, reset readstatus flag */
+ readstatus = 0;
break;
}
@@ -350,8 +362,8 @@
Address = Address + 4;
}
- /* Return ReadStatus value: (0: Page not erased, 1: Sector erased) */
- return ReadStatus;
+ /* Return readstatus value: (0: Page not erased, 1: Page erased) */
+ return readstatus;
}
/**