FlashWriter.cpp

00001 #include "stm32f4xx_flash.h"
00002 #include "FlashWriter.h"
00003 
00004 FlashWriter::FlashWriter(int sector) {
00005     if (sector > 7) sector = 7;
00006     __sector = sector;
00007     __base = __SECTOR_ADDRS[sector];
00008     __ready = false;
00009 }
00010 
00011 bool FlashWriter::ready() {
00012     return __ready;
00013 }
00014 
00015 void FlashWriter::open() {
00016     FLASH_Unlock();
00017     FLASH_ClearFlag( FLASH_FLAG_EOP |  FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR | FLASH_FLAG_PGSERR);
00018     FLASH_EraseSector(__SECTORS[__sector], VoltageRange_3);
00019     __ready = true;
00020 }
00021 
00022 void FlashWriter::write(uint32_t index, int x) {
00023     union {int a; uint32_t b;};
00024     a = x;
00025     FLASH_ProgramWord(__base + 4 * index, b);
00026 }
00027 
00028 void FlashWriter::write(uint32_t index, unsigned int x) {
00029     FLASH_ProgramWord(__base + 4 * index, x);
00030 }
00031 
00032 void FlashWriter::write(uint32_t index, float x) {
00033     union {float a; uint32_t b;};
00034     a = x;
00035     FLASH_ProgramWord(__base + 4 * index, b);
00036 }
00037 
00038 void FlashWriter::close() {
00039     FLASH_Lock();
00040     __ready = false;
00041 }
00042 
00043 int flashReadInt(uint32_t sector, uint32_t index) {
00044     return *(int*) (__SECTOR_ADDRS[sector] + 4 * index);
00045 }   
00046 
00047 uint32_t flashReadUint(uint32_t sector, uint32_t index) {
00048     return *(uint32_t*) (__SECTOR_ADDRS[sector] + 4 * index);
00049 }   
00050 
00051 float flashReadFloat(uint32_t sector, uint32_t index) {
00052     return *(float*) (__SECTOR_ADDRS[sector] + 4 * index);
00053 }