simple test EEPROM emulation (STM algorithm described in the application notes: AN4061, AN3969, AN2594, AN3390, AN4056) for STM32F091
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.
main.cpp@2:3d16b28380a9, 2016-07-29 (annotated)
- Committer:
- mega64
- Date:
- Fri Jul 29 21:18:28 2016 +0000
- Revision:
- 2:3d16b28380a9
- Parent:
- 0:bbe849f641a8
Protect flash area of EEPROM simulation in case a larger code
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mega64 | 0:bbe849f641a8 | 1 | |
mega64 | 0:bbe849f641a8 | 2 | #include "mbed.h" |
mega64 | 0:bbe849f641a8 | 3 | #include "eeprom.h" |
mega64 | 0:bbe849f641a8 | 4 | #include <ctype.h> |
mega64 | 0:bbe849f641a8 | 5 | |
mega64 | 2:3d16b28380a9 | 6 | |
mega64 | 2:3d16b28380a9 | 7 | |
mega64 | 0:bbe849f641a8 | 8 | uint16_t n = 0; |
mega64 | 0:bbe849f641a8 | 9 | /* Virtual address defined by the user: 0xFFFF value is prohibited */ |
mega64 | 2:3d16b28380a9 | 10 | uint16_t VirtAddVarTab[NB_OF_VAR] = {0x5555, 0x6666, 0x7777}; |
mega64 | 0:bbe849f641a8 | 11 | uint16_t VarDataTab[] = {0, 0, 0}; |
mega64 | 0:bbe849f641a8 | 12 | |
mega64 | 0:bbe849f641a8 | 13 | |
mega64 | 2:3d16b28380a9 | 14 | |
mega64 | 0:bbe849f641a8 | 15 | int main() |
mega64 | 0:bbe849f641a8 | 16 | { |
mega64 | 0:bbe849f641a8 | 17 | |
mega64 | 0:bbe849f641a8 | 18 | /* Unlock the Flash Program Erase controller */ |
mega64 | 0:bbe849f641a8 | 19 | HAL_FLASH_Unlock(); |
mega64 | 0:bbe849f641a8 | 20 | |
mega64 | 0:bbe849f641a8 | 21 | EE_Init(); |
mega64 | 0:bbe849f641a8 | 22 | |
mega64 | 0:bbe849f641a8 | 23 | printf("EEPROM emulation test\n"); |
mega64 | 0:bbe849f641a8 | 24 | |
mega64 | 0:bbe849f641a8 | 25 | printf("\n\rType one of the following commands and press space or enter"); |
mega64 | 0:bbe849f641a8 | 26 | 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:bbe849f641a8 | 27 | printf("\n\rwhere <n> is uint16_t value (0-65535)"); |
mega64 | 0:bbe849f641a8 | 28 | printf("\n\r"); |
mega64 | 0:bbe849f641a8 | 29 | |
mega64 | 0:bbe849f641a8 | 30 | |
mega64 | 0:bbe849f641a8 | 31 | char command[20]; |
mega64 | 0:bbe849f641a8 | 32 | char arg[10]; |
mega64 | 0:bbe849f641a8 | 33 | int i; |
mega64 | 0:bbe849f641a8 | 34 | |
mega64 | 0:bbe849f641a8 | 35 | while(1) { |
mega64 | 0:bbe849f641a8 | 36 | scanf("%s", command); |
mega64 | 0:bbe849f641a8 | 37 | i=0; |
mega64 | 0:bbe849f641a8 | 38 | while(command[i]) |
mega64 | 0:bbe849f641a8 | 39 | { |
mega64 | 0:bbe849f641a8 | 40 | command[i]=toupper(command[i]); |
mega64 | 0:bbe849f641a8 | 41 | i++; |
mega64 | 0:bbe849f641a8 | 42 | } |
mega64 | 0:bbe849f641a8 | 43 | |
mega64 | 0:bbe849f641a8 | 44 | |
mega64 | 0:bbe849f641a8 | 45 | if (strcmp("READ", command)==0) { |
mega64 | 0:bbe849f641a8 | 46 | for (i=0; i<3; i++) { |
mega64 | 0:bbe849f641a8 | 47 | EE_ReadVariable(VirtAddVarTab[i], &VarDataTab[i]); |
mega64 | 0:bbe849f641a8 | 48 | }; |
mega64 | 0:bbe849f641a8 | 49 | printf("\nvar1=%6u, var2=%6u, var3=%6u",VarDataTab[0],VarDataTab[1],VarDataTab[2]); |
mega64 | 0:bbe849f641a8 | 50 | } |
mega64 | 0:bbe849f641a8 | 51 | /////////////////////////////////////////////////////////////////////////////////////////////////////// |
mega64 | 0:bbe849f641a8 | 52 | else if (strcmp("WRITE1", command)==0) { |
mega64 | 0:bbe849f641a8 | 53 | scanf("%s", arg); |
mega64 | 0:bbe849f641a8 | 54 | printf("\nok"); |
mega64 | 0:bbe849f641a8 | 55 | n=atoi(arg); |
mega64 | 0:bbe849f641a8 | 56 | EE_WriteVariable(VirtAddVarTab[0], n); |
mega64 | 0:bbe849f641a8 | 57 | } |
mega64 | 0:bbe849f641a8 | 58 | //////////////////////////////////////////////////////////////////////////////////// |
mega64 | 0:bbe849f641a8 | 59 | else if (strcmp("WRITE2", command)==0) { |
mega64 | 0:bbe849f641a8 | 60 | scanf("%s", arg); |
mega64 | 0:bbe849f641a8 | 61 | printf("\nok"); |
mega64 | 0:bbe849f641a8 | 62 | n=atoi(arg); |
mega64 | 0:bbe849f641a8 | 63 | EE_WriteVariable(VirtAddVarTab[1], n); |
mega64 | 0:bbe849f641a8 | 64 | } |
mega64 | 0:bbe849f641a8 | 65 | //////////////////////////////////////////////////////////////////////////////////// |
mega64 | 0:bbe849f641a8 | 66 | else if (strcmp("WRITE3", command)==0) { |
mega64 | 0:bbe849f641a8 | 67 | scanf("%s", arg); |
mega64 | 0:bbe849f641a8 | 68 | printf("\nok"); |
mega64 | 0:bbe849f641a8 | 69 | n=atoi(arg); |
mega64 | 0:bbe849f641a8 | 70 | EE_WriteVariable(VirtAddVarTab[2], n); |
mega64 | 0:bbe849f641a8 | 71 | } |
mega64 | 0:bbe849f641a8 | 72 | //////////////////////////////////////////////////////////////////////////////////// |
mega64 | 0:bbe849f641a8 | 73 | else if (strcmp("T1", command)==0) { |
mega64 | 0:bbe849f641a8 | 74 | // multiple write test. After test var1 = 1000 |
mega64 | 0:bbe849f641a8 | 75 | printf("\nok"); |
mega64 | 0:bbe849f641a8 | 76 | for (n=0;n<1001;n++) |
mega64 | 0:bbe849f641a8 | 77 | { |
mega64 | 0:bbe849f641a8 | 78 | EE_WriteVariable(VirtAddVarTab[0], n); |
mega64 | 0:bbe849f641a8 | 79 | }; |
mega64 | 0:bbe849f641a8 | 80 | } |
mega64 | 0:bbe849f641a8 | 81 | //////////////////////////////////////////////////////////////////////////////////// |
mega64 | 0:bbe849f641a8 | 82 | else if (strcmp("T2", command)==0) { |
mega64 | 2:3d16b28380a9 | 83 | // multiple write test. After test var2 = 1001 |
mega64 | 0:bbe849f641a8 | 84 | printf("\nok"); |
mega64 | 0:bbe849f641a8 | 85 | for (n=0;n<1002;n++) |
mega64 | 0:bbe849f641a8 | 86 | { |
mega64 | 0:bbe849f641a8 | 87 | EE_WriteVariable(VirtAddVarTab[1], n); |
mega64 | 0:bbe849f641a8 | 88 | }; |
mega64 | 0:bbe849f641a8 | 89 | } |
mega64 | 0:bbe849f641a8 | 90 | //////////////////////////////////////////////////////////////////////////////////// |
mega64 | 0:bbe849f641a8 | 91 | else if (strcmp("T3", command)==0) { |
mega64 | 2:3d16b28380a9 | 92 | // multiple write test. After test var3 = 1002 |
mega64 | 0:bbe849f641a8 | 93 | printf("\nok"); |
mega64 | 0:bbe849f641a8 | 94 | for (n=0;n<1003;n++) |
mega64 | 0:bbe849f641a8 | 95 | { |
mega64 | 0:bbe849f641a8 | 96 | EE_WriteVariable(VirtAddVarTab[2], n); |
mega64 | 0:bbe849f641a8 | 97 | }; |
mega64 | 0:bbe849f641a8 | 98 | } |
mega64 | 0:bbe849f641a8 | 99 | //////////////////////////////////////////////////////////////////////////////////// |
mega64 | 0:bbe849f641a8 | 100 | |
mega64 | 0:bbe849f641a8 | 101 | else perror("\nThere is no command matching. Try again"); |
mega64 | 0:bbe849f641a8 | 102 | |
mega64 | 0:bbe849f641a8 | 103 | command[0] = arg[0] = 0; |
mega64 | 0:bbe849f641a8 | 104 | printf("\n\r"); |
mega64 | 0:bbe849f641a8 | 105 | } |
mega64 | 0:bbe849f641a8 | 106 | |
mega64 | 0:bbe849f641a8 | 107 | |
mega64 | 0:bbe849f641a8 | 108 | } |