Nothing Special / Mbed 2 deprecated 00_eeprom_emulation_f091

simple test EEPROM emulation (STM algorithm described in the application notes: AN4061, AN3969, AN2594, AN3390, AN4056) for STM32F091

Dependencies:   mbed

Description in AN4061 from STM.

Changed (compared with the original code AN4061):

  • possibility of a larger size of emulated EEPROM (using multiple Flash pages)
  • dummy variables prevent overwrite code in Flash by algorithm of EEPROM emulation




Macro PAGE_NB_PVP (in eeprom.h) defines the size of the virtual page.
Eg. For F091 where Flash page are 2kB value 4 gives 8kB.

Size 8kB virtual page gives you the ability to use max. approx. 2k of 16-bit variables.

Diff: eeprom/eeprom.cpp

Revision:
2:3d16b28380a9
Parent:
1:e91328f723ab
Child:
3:a51a1737b55d
--- a/eeprom/eeprom.cpp	Sun May 29 02:04:21 2016 +0000
+++ b/eeprom/eeprom.cpp	Fri Jul 29 21:18:28 2016 +0000
@@ -47,6 +47,10 @@
 /* Private macro -------------------------------------------------------------*/
 /* Private variables ---------------------------------------------------------*/
 
+/* Dummy variable to protect eeprom pages if code size is bigger than 32kb (F401) */
+const uint8_t Eeprom_area[2 * PAGE_SIZE] __attribute__((at(EEPROM_START_ADDRESS),used))={ [0 ... (2 * PAGE_SIZE-1)] = 0xFF };
+
+
 /* Global variable used to store variable value in read sequence */
 uint16_t DataVar = 0;