status_code_t nvm_page_erase(mem_type_t mem, uint32_t page_number)
{
switch (mem) {
case INT_FLASH:
if ((page_number >= 0) &&
(page_number <
(BOOT_SECTION_START / FLASH_PAGE_SIZE))) {
nvm_flash_erase_app_page((flash_addr_t)(page_number *
FLASH_PAGE_SIZE));
} else if ((page_number >= 0) &&
(page_number <
(BOOT_SECTION_END / FLASH_PAGE_SIZE))) {
nvm_flash_erase_boot_page((flash_addr_t)(page_number *
FLASH_PAGE_SIZE));
} else {
return ERR_INVALID_ARG;
}
break;
case INT_USERPAGE:
nvm_flash_erase_user_section();
break;
case INT_EEPROM:
nvm_eeprom_erase_page((uint8_t)page_number);
break;
default:
return ERR_INVALID_ARG;
}
return STATUS_OK;
}
/**
* \brief Write specific parts of user flash section
*
* \param address the address to where to write
* \param buf pointer to the data
* \param len the number of bytes to write
* \param b_blank_check if True then the page flash is checked before write
* to run or not the erase page command.
*
* Set b_blank_check to false if all application flash is erased before.
*/
void nvm_user_sig_write_buffer(flash_addr_t address, const void *buf,
uint16_t len, bool b_blank_check)
{
uint16_t w_value;
uint16_t page_pos;
uint16_t opt_address = (uint16_t)address;
bool b_flag_erase = false;
while ( len ) {
for (page_pos=0; page_pos<FLASH_PAGE_SIZE; page_pos+=2 ) {
if (b_blank_check) {
// Read flash to know if the erase command is mandatory
LSB(w_value) = nvm_read_user_signature_row(page_pos);
MSB(w_value) = nvm_read_user_signature_row(page_pos+1);
if (w_value!=0xFFFF) {
b_flag_erase = true; // The page is not empty
}
}else{
w_value = 0xFFFF;
}
// Update flash buffer
if (len) {
if (opt_address == page_pos) {
// The MSB of flash word must be changed
// because the address is even
len--;
opt_address++;
LSB(w_value)=*(uint8_t*)buf;
buf=(uint8_t*)buf+1;
}
}
if (len) {
if (opt_address == (page_pos+1)) {
// The LSB of flash word must be changed
// because the user buffer is not empty
len--;
opt_address++;
MSB(w_value)=*(uint8_t*)buf;
buf=(uint8_t*)buf+1;
}
}
// Load flash buffer
nvm_flash_load_word_to_buffer(page_pos,w_value);
}
}
// Write flash buffer
if (b_flag_erase) {
nvm_flash_erase_user_section();
}
nvm_flash_write_user_page();
}
