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fix nvm rewrite

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microDev 2021-02-18 18:42:00 +05:30
parent f2d7a5f1e1
commit 696d212dc7
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GPG Key ID: 2C0867BE60967730
1 changed files with 32 additions and 9 deletions
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41
ports/raspberrypi/common-hal/nvm/ByteArray.c
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@ -32,26 +32,54 @@
#include "src/rp2_common/hardware_flash/include/hardware/flash.h"
extern uint32_t __flash_binary_start;
static const uint32_t flash_binary_start = (uint32_t) &__flash_binary_start;
#define RMV_OFFSET(addr) addr - flash_binary_start
uint32_t common_hal_nvm_bytearray_get_length(nvm_bytearray_obj_t* self) {
return self->len;
}
static void write_page(uint32_t page_addr, uint32_t offset, uint32_t len, uint8_t* bytes) {
// Write a whole page to flash, buffering it first and then erasing and rewriting
// it since we can only clear a whole page at a time.
// Write a whole page to flash, buffering it first and then erasing and rewriting it
// since we can only write a whole page at a time.
if (offset == 0 && len == FLASH_PAGE_SIZE) {
flash_range_program(page_addr - (uint32_t) &__flash_binary_start, bytes, FLASH_PAGE_SIZE);
flash_range_program(RMV_OFFSET(page_addr), bytes, FLASH_PAGE_SIZE);
} else {
uint8_t buffer[FLASH_PAGE_SIZE];
memcpy(buffer, (uint8_t*) page_addr, FLASH_PAGE_SIZE);
memcpy(buffer + offset, bytes, len);
flash_range_program(page_addr - (uint32_t) &__flash_binary_start, buffer, FLASH_PAGE_SIZE);
flash_range_program(RMV_OFFSET(page_addr), buffer, FLASH_PAGE_SIZE);
}
}
static void write_sector(uint32_t address, uint32_t len, uint8_t* bytes) {
// Write a whole sector to flash, buffering it first and then erasing and rewriting it
// since we can only erase a whole sector at a time.
uint8_t buffer[FLASH_SECTOR_SIZE];
memcpy(buffer, (uint8_t*) CIRCUITPY_INTERNAL_NVM_START_ADDR, FLASH_SECTOR_SIZE);
memcpy(buffer + address, bytes, len);
flash_range_erase(RMV_OFFSET(CIRCUITPY_INTERNAL_NVM_START_ADDR), FLASH_SECTOR_SIZE);
flash_range_program(RMV_OFFSET(CIRCUITPY_INTERNAL_NVM_START_ADDR), buffer, FLASH_SECTOR_SIZE);
}
void common_hal_nvm_bytearray_get_bytes(nvm_bytearray_obj_t* self,
uint32_t start_index, uint32_t len, uint8_t* values) {
memcpy(values, self->start_address + start_index, len);
}
bool common_hal_nvm_bytearray_set_bytes(nvm_bytearray_obj_t* self,
uint32_t start_index, uint8_t* values, uint32_t len) {
uint8_t values_in[len];
common_hal_nvm_bytearray_get_bytes(self, start_index, len, values_in);
for (uint32_t i = 0; i < len; i++) {
if (values_in[i] != UINT8_MAX) {
write_sector(start_index, len, values);
return true;
}
}
uint32_t address = (uint32_t) self->start_address + start_index;
uint32_t offset = address % FLASH_PAGE_SIZE;
uint32_t page_addr = address - offset;
@ -67,8 +95,3 @@ bool common_hal_nvm_bytearray_set_bytes(nvm_bytearray_obj_t* self,
return true;
}
void common_hal_nvm_bytearray_get_bytes(nvm_bytearray_obj_t* self,
uint32_t start_index, uint32_t len, uint8_t* values) {
memcpy(values, self->start_address + start_index, len);
}