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     FLASH_Unlock();
00011     FLASH_ClearFlag( FLASH_FLAG_EOP |  FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR | FLASH_FLAG_PGSERR);
00012     FLASH_EraseSector(__SECTORS[sector], VoltageRange_3);
00013 }
00014 
00015 bool FlashWriter::ready() {
00016     return __ready;
00017 }
00018 
00019 void FlashWriter::open() {
00020     FLASH_Unlock();
00021     FLASH_ClearFlag( FLASH_FLAG_EOP |  FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR | FLASH_FLAG_PGSERR);
00022     FLASH_EraseSector(__SECTORS[__sector], VoltageRange_3);
00023     __ready = true;
00024 }
00025 
00026 void FlashWriter::write(uint32_t index, int x) {
00027     union {int a; uint32_t b;};
00028     a = x;
00029     FLASH_ProgramWord(__base + 4 * index, b);
00030 }
00031 
00032 void FlashWriter::write(uint32_t index, unsigned int x) {
00033     FLASH_ProgramWord(__base + 4 * index, x);
00034 }
00035 
00036 void FlashWriter::write(uint32_t index, float x) {
00037     union {float a; uint32_t b;};
00038     a = x;
00039     FLASH_ProgramWord(__base + 4 * index, b);
00040 }
00041 
00042 void FlashWriter::close() {
00043     FLASH_Lock();
00044 }
00045 
00046 int flashReadInt(uint32_t sector, uint32_t index) {
00047     return *(int*) (__SECTOR_ADDRS[sector] + 4 * index);
00048 }   
00049 
00050 uint32_t flashReadUint(uint32_t sector, uint32_t index) {
00051     return *(uint32_t*) (__SECTOR_ADDRS[sector] + 4 * index);
00052 }   
00053 
00054 float flashReadFloat(uint32_t sector, uint32_t index) {
00055     return *(float*) (__SECTOR_ADDRS[sector] + 4 * index);
00056 }