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@ -26,7 +26,7 @@
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#include "common-hal/nvm/ByteArray.h"
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#include "asf/sam0/drivers/nvm/nvm.h"
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#include "hal_flash.h"
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#include <stdint.h>
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#include <string.h>
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@ -36,48 +36,12 @@ uint32_t common_hal_nvm_bytearray_get_length(nvm_bytearray_obj_t *self) {
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}
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bool common_hal_nvm_bytearray_set_bytes(nvm_bytearray_obj_t *self,
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uint32_t start_index, uint8_t* values, uint32_t len) {
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uint32_t total_written = 0;
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for (uint32_t i = 0; i < self->len / NVMCTRL_ROW_SIZE; i++) {
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uint32_t row_start = NVMCTRL_ROW_SIZE * i;
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if (row_start + NVMCTRL_ROW_SIZE < start_index || start_index + len < row_start) {
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continue;
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}
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uint8_t temp_row[NVMCTRL_ROW_SIZE];
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memcpy(temp_row,
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self->start_address + row_start,
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NVMCTRL_ROW_SIZE);
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enum status_code error_code;
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do {
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error_code = nvm_erase_row((uint32_t) self->start_address + row_start);
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} while (error_code == STATUS_BUSY);
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if (error_code != STATUS_OK) {
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return false;
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}
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uint32_t data_start = 0;
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if (start_index > row_start) {
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data_start = start_index - row_start;
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}
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uint32_t data_len = len;
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uint32_t data_remaining = data_len - total_written;
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uint32_t row_remaining = NVMCTRL_ROW_SIZE - data_start;
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if (data_remaining > row_remaining) {
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data_len = row_remaining;
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}
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memcpy(temp_row + data_start,
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values + total_written,
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data_len);
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for (int page = 0; page < NVMCTRL_ROW_SIZE / NVMCTRL_PAGE_SIZE; page++) {
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do {
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error_code = nvm_write_buffer((uint32_t) self->start_address + row_start + page * NVMCTRL_PAGE_SIZE,
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temp_row + page * NVMCTRL_PAGE_SIZE,
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NVMCTRL_PAGE_SIZE);
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} while (error_code == STATUS_BUSY);
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if (error_code != STATUS_OK) {
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return false;
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}
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}
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}
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uint32_t start_index, uint8_t* values, uint32_t len) {
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// We don't use features that use any advanced NVMCTRL features so we can fake the descriptor
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// whenever we need it instead of storing it long term.
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struct flash_descriptor desc;
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desc.dev.hw = NVMCTRL;
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flash_write(&desc, (uint32_t) self->start_address + start_index, values, len);
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return true;
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}
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Scott Shawcroft
5 years ago