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Fixed lots of write/read stuff.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
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Pol Henarejos 2022-02-07 11:13:37 +01:00
parent badb1780c6
commit 0c43939de2
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GPG key ID: C0095B7870A4CCD3
1 changed files with 21 additions and 23 deletions
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44
flash.c
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@ -53,13 +53,11 @@ const uintptr_t start_data_pool = (XIP_BASE + FLASH_TARGET_OFFSET);
const uintptr_t end_data_pool = (XIP_BASE + PICO_FLASH_SIZE_BYTES)-FLASH_DATA_HEADER_SIZE; //This is a fixed value. DO NOT CHANGE
#define FLASH_ADDR_DATA_STORAGE_START start_data_pool
extern int flash_erase_page (uintptr_t addr);
extern int flash_program_block(uintptr_t addr, const uint8_t *data, size_t len);
extern int flash_program_halfword (uintptr_t addr, uint16_t data);
int flash_program_block(uintptr_t addr, const uint8_t *data, size_t len) ;
extern int flash_check_blank (const uint8_t *p_start, size_t size);
extern int flash_write (uintptr_t dst_addr, const uint8_t *src, size_t len);
extern int flash_program_uintptr(uintptr_t, uintptr_t);
void low_flash_available();
extern void low_flash_available();
/*
* Flash data pool managenent
@ -83,34 +81,36 @@ void low_flash_available();
* DATA: data * LEN
* PAD: optional byte for 16-bit alignment
*/
uintptr_t allocate_free_addr(uint16_t size) {
if (size > FLASH_SECTOR_SIZE)
return 0x0; //ERROR
size_t real_size = size+sizeof(uint16_t)+sizeof(uintptr_t)+sizeof(uint16_t); //len+len size+next address+fid
for (uintptr_t base = end_data_pool; base >= start_data_pool; base = *(uintptr_t *)base) {
uintptr_t next_base = 0x0;
for (uintptr_t base = end_data_pool; base >= start_data_pool; base = next_base) {
uintptr_t addr_alg = base & -FLASH_SECTOR_SIZE; //start address of sector
uintptr_t potential_addr = base-real_size;
if (*(uintptr_t *)base == 0x0) { //we are at the end
next_base = flash_read_uintptr(base);
if (next_base == 0x0) { //we are at the end
//now we check if we fit in the current sector
if (addr_alg <= potential_addr) //it fits in the current sector
{
*(uintptr_t *)potential_addr = 0x0;
*(uintptr_t *)base = potential_addr;
flash_program_uintptr(potential_addr, 0x0);
flash_program_uintptr(base, potential_addr);
return potential_addr;
}
else if (addr_alg-FLASH_SECTOR_SIZE >= start_data_pool) { //check whether it fits in the next sector, so we take addr_aligned as the base
potential_addr = addr_alg-real_size;
*(uintptr_t *)potential_addr = 0x0;
*(uintptr_t *)base = potential_addr;
flash_program_uintptr(potential_addr, 0x0);
flash_program_uintptr(base, potential_addr);
return potential_addr;
}
return 0x0;
}
//we check if |base-(next_addr+size_next_addr)| >= |base-potential_addr|
else if (base-(*(uintptr_t *)base+*(uint16_t *)(*(uintptr_t *)base+sizeof(uintptr_t)+sizeof(uint16_t))) >= base-potential_addr && addr_alg <= potential_addr) {
*(uintptr_t *)potential_addr = *(uintptr_t *)base;
*(uintptr_t *)base = potential_addr;
//we check if |base-(next_addr+size_next_addr)| > |base-potential_addr| only if fid != 1xxx (not size blocked)
else if (addr_alg <= potential_addr && base-(next_base+flash_read_uint16(next_base+sizeof(uintptr_t)+sizeof(uint16_t))) > base-potential_addr && flash_read_uint16(next_base+sizeof(uintptr_t)+sizeof(uint16_t)) & 0x1000 != 0x1000) {
flash_program_uintptr(potential_addr, next_base);
flash_program_uintptr(base, potential_addr);
return potential_addr;
}
}
@ -118,11 +118,11 @@ uintptr_t allocate_free_addr(uint16_t size) {
}
int flash_clear_file(file_t *file) {
uintptr_t prev_addr = (uintptr_t)(file->data+*(uint16_t *)file->data);
uintptr_t prev_addr = (uintptr_t)(file->data+flash_read_uint16(file->data)+sizeof(uint16_t));
uintptr_t base_addr = (uintptr_t)file->data-sizeof(uintptr_t);
uintptr_t next_addr = *(uintptr_t *)base_addr;
*(uintptr_t *)prev_addr = next_addr;
*(uint16_t *)file->data = 0;
uintptr_t next_addr = flash_read_uintptr(base_addr);
flash_program_uintptr(prev_addr, next_addr);
flash_program_halfword((uintptr_t)file->data, 0);
return 0;
}
@ -130,11 +130,10 @@ int flash_write_data_to_file(file_t *file, const uint8_t *data, uint16_t len) {
if (len > FLASH_SECTOR_SIZE)
return 1;
if (file->data) { //already in flash
uint16_t size_file_flash = *(uint16_t *)file->data;
uint16_t size_file_flash = flash_read_uint16(file->data);
if (len <= size_file_flash) { //it fits, no need to move it
flash_program_halfword((uintptr_t)file->data, len);
flash_program_block((uintptr_t)file->data+sizeof(uint16_t), data, len);
low_flash_available();
return 0;
}
else { //we clear the old file
@ -148,7 +147,6 @@ int flash_write_data_to_file(file_t *file, const uint8_t *data, uint16_t len) {
flash_program_halfword(new_addr+sizeof(uintptr_t), file->fid);
flash_program_halfword((uintptr_t)file->data, len);
flash_program_block((uintptr_t)file->data+sizeof(uint16_t), data, len);
low_flash_available();
return 0;
}