Nothing Special / Mbed 2 deprecated 00_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.

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 F030 where Flash page are 1kB value 4 gives 4kB.

Size 4kB virtual page gives you the ability to use max. approx. 1k of 16-bit variables.

main.cpp@0:2eda09ff61d0, 2016-09-24 (annotated)

Committer:
mega64
Date:
Sat Sep 24 00:52:55 2016 +0000
Revision:
0:2eda09ff61d0
Added possibility to increase size of virtual pages of emulation

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mega64 0:2eda09ff61d0 1
mega64 0:2eda09ff61d0 2 #include "mbed.h"
mega64 0:2eda09ff61d0 3 #include "eeprom.h"
mega64 0:2eda09ff61d0 4 #include <ctype.h>
mega64 0:2eda09ff61d0 5
mega64 0:2eda09ff61d0 6
mega64 0:2eda09ff61d0 7
mega64 0:2eda09ff61d0 8 uint16_t n = 0;
mega64 0:2eda09ff61d0 9 /* Virtual address defined by the user: 0xFFFF value is prohibited */
mega64 0:2eda09ff61d0 10 uint16_t VirtAddVarTab[NB_OF_VAR] = {0x5555, 0x6666, 0x7777};
mega64 0:2eda09ff61d0 11 uint16_t VarDataTab[] = {0, 0, 0};
mega64 0:2eda09ff61d0 12
mega64 0:2eda09ff61d0 13
mega64 0:2eda09ff61d0 14
mega64 0:2eda09ff61d0 15 int main()
mega64 0:2eda09ff61d0 16 {
mega64 0:2eda09ff61d0 17
mega64 0:2eda09ff61d0 18
mega64 0:2eda09ff61d0 19
mega64 0:2eda09ff61d0 20 /* Unlock the Flash Program Erase controller */
mega64 0:2eda09ff61d0 21 HAL_FLASH_Unlock();
mega64 0:2eda09ff61d0 22
mega64 0:2eda09ff61d0 23 EE_Init();
mega64 0:2eda09ff61d0 24
mega64 0:2eda09ff61d0 25
mega64 0:2eda09ff61d0 26 printf("EEPROM emulation test\n\n");
mega64 0:2eda09ff61d0 27 printf("\n\rType one of the following commands and press space or enter");
mega64 0:2eda09ff61d0 28 printf("\n\r READ - read all variables\n\r WRITE1 <n> - write first variable\n\r WRITE2 <n> - write second variable\n\r WRITE3 <n> - write third variable");
mega64 0:2eda09ff61d0 29 printf("\n\rwhere <n> is uint16_t value (0-65535)");
mega64 0:2eda09ff61d0 30 printf("\n\r");
mega64 0:2eda09ff61d0 31
mega64 0:2eda09ff61d0 32
mega64 0:2eda09ff61d0 33 char command[20];
mega64 0:2eda09ff61d0 34 char arg[10];
mega64 0:2eda09ff61d0 35 int i;
mega64 0:2eda09ff61d0 36
mega64 0:2eda09ff61d0 37 while(1) {
mega64 0:2eda09ff61d0 38 scanf("%s", command);
mega64 0:2eda09ff61d0 39 i=0;
mega64 0:2eda09ff61d0 40 while(command[i])
mega64 0:2eda09ff61d0 41 {
mega64 0:2eda09ff61d0 42 command[i]=toupper(command[i]);
mega64 0:2eda09ff61d0 43 i++;
mega64 0:2eda09ff61d0 44 }
mega64 0:2eda09ff61d0 45
mega64 0:2eda09ff61d0 46
mega64 0:2eda09ff61d0 47 if (strcmp("READ", command)==0) {
mega64 0:2eda09ff61d0 48 for (i=0; i<3; i++) {
mega64 0:2eda09ff61d0 49 EE_ReadVariable(VirtAddVarTab[i], &VarDataTab[i]);
mega64 0:2eda09ff61d0 50 };
mega64 0:2eda09ff61d0 51 printf("\nvar1=%6u, var2=%6u, var3=%6u",VarDataTab[0],VarDataTab[1],VarDataTab[2]);
mega64 0:2eda09ff61d0 52 }
mega64 0:2eda09ff61d0 53 ///////////////////////////////////////////////////////////////////////////////////////////////////////
mega64 0:2eda09ff61d0 54 else if (strcmp("WRITE1", command)==0) {
mega64 0:2eda09ff61d0 55 scanf("%s", arg);
mega64 0:2eda09ff61d0 56 printf("\nok");
mega64 0:2eda09ff61d0 57 n=atoi(arg);
mega64 0:2eda09ff61d0 58 EE_WriteVariable(VirtAddVarTab[0], n);
mega64 0:2eda09ff61d0 59 }
mega64 0:2eda09ff61d0 60 ////////////////////////////////////////////////////////////////////////////////////
mega64 0:2eda09ff61d0 61 else if (strcmp("WRITE2", command)==0) {
mega64 0:2eda09ff61d0 62 scanf("%s", arg);
mega64 0:2eda09ff61d0 63 printf("\nok");
mega64 0:2eda09ff61d0 64 n=atoi(arg);
mega64 0:2eda09ff61d0 65 EE_WriteVariable(VirtAddVarTab[1], n);
mega64 0:2eda09ff61d0 66 }
mega64 0:2eda09ff61d0 67 ////////////////////////////////////////////////////////////////////////////////////
mega64 0:2eda09ff61d0 68 else if (strcmp("WRITE3", command)==0) {
mega64 0:2eda09ff61d0 69 scanf("%s", arg);
mega64 0:2eda09ff61d0 70 printf("\nok");
mega64 0:2eda09ff61d0 71 n=atoi(arg);
mega64 0:2eda09ff61d0 72 EE_WriteVariable(VirtAddVarTab[2], n);
mega64 0:2eda09ff61d0 73 }
mega64 0:2eda09ff61d0 74 ////////////////////////////////////////////////////////////////////////////////////
mega64 0:2eda09ff61d0 75 else if (strcmp("T1", command)==0) {
mega64 0:2eda09ff61d0 76 // multiple write test. After test var1 = 1000
mega64 0:2eda09ff61d0 77 printf("\nok");
mega64 0:2eda09ff61d0 78 for (n=0;n<1001;n++)
mega64 0:2eda09ff61d0 79 {
mega64 0:2eda09ff61d0 80 EE_WriteVariable(VirtAddVarTab[0], n);
mega64 0:2eda09ff61d0 81 };
mega64 0:2eda09ff61d0 82 }
mega64 0:2eda09ff61d0 83 ////////////////////////////////////////////////////////////////////////////////////
mega64 0:2eda09ff61d0 84 else if (strcmp("T2", command)==0) {
mega64 0:2eda09ff61d0 85 // multiple write test. After test var2 = 1001
mega64 0:2eda09ff61d0 86 printf("\nok");
mega64 0:2eda09ff61d0 87 for (n=0;n<1002;n++)
mega64 0:2eda09ff61d0 88 {
mega64 0:2eda09ff61d0 89 EE_WriteVariable(VirtAddVarTab[1], n);
mega64 0:2eda09ff61d0 90 };
mega64 0:2eda09ff61d0 91 }
mega64 0:2eda09ff61d0 92 ////////////////////////////////////////////////////////////////////////////////////
mega64 0:2eda09ff61d0 93 else if (strcmp("T3", command)==0) {
mega64 0:2eda09ff61d0 94 // multiple write test. After test var3 = 1002
mega64 0:2eda09ff61d0 95 printf("\nok");
mega64 0:2eda09ff61d0 96 for (n=0;n<1003;n++)
mega64 0:2eda09ff61d0 97 {
mega64 0:2eda09ff61d0 98 EE_WriteVariable(VirtAddVarTab[2], n);
mega64 0:2eda09ff61d0 99 };
mega64 0:2eda09ff61d0 100 }
mega64 0:2eda09ff61d0 101 ////////////////////////////////////////////////////////////////////////////////////
mega64 0:2eda09ff61d0 102
mega64 0:2eda09ff61d0 103 else perror("\nThere is no command matching. Try again");
mega64 0:2eda09ff61d0 104
mega64 0:2eda09ff61d0 105 command[0] = arg[0] = 0;
mega64 0:2eda09ff61d0 106 printf("\n\r");
mega64 0:2eda09ff61d0 107 }
mega64 0:2eda09ff61d0 108
mega64 0:2eda09ff61d0 109
mega64 0:2eda09ff61d0 110 }