rooty/LibrePilot
1
0
Fork 0
mirror of https://bitbucket.org/librepilot/librepilot.git synced 2025-01-17 02:52:12 +01:00
Code Issues Releases Activity

Flash internal: writes optimization using 4 bytes parallelism

Browse Source
This commit is contained in:
Alessio Morale 2013-05-11 22:04:47 +02:00
parent 687e75b2e2
commit 511283c608
1 changed files with 11 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
flight/pios/stm32f4xx/pios_flash_internal.c
View File

@ -276,16 +276,20 @@ static int32_t PIOS_Flash_Internal_WriteData(uintptr_t flash_id, uint32_t addr,
/* Write crosses the end of the sector */
return -3;
}
FLASH_Status status;
for (uint16_t i = 0; i < len/4; i++){
uint32_t data_word = *(uint32_t *)(data + i*4);
status = FLASH_ProgramWord(addr + i * 4, data_word);
if(status != FLASH_COMPLETE)
return -4;
}
/* Write the data */
for (uint16_t i = 0; i < len; i++) {
FLASH_Status status;
/*
* This is inefficient. Should try to do word writes.
* Not sure if word writes need to be aligned though.
*/
for (uint16_t i = len - len % 4; i < len; i++) {
status = FLASH_ProgramByte(addr + i, data[i]);
PIOS_Assert(status == FLASH_COMPLETE);
if(status != FLASH_COMPLETE)
return -5;
}
return 0;