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SourceVuESP-IDF Framework and ExamplesESP-IDFbootloader_flash_read()

bootloader_flash_read() function

Read data from Flash.

Syntax

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Summary

Declaration

Definition

from bootloader_flash_priv.h:123

esp_err_t bootloader_flash_read(size_t src_addr, void *dest, size_t size, bool allow_decrypt);

Implemented in bootloader_flash.c:84

Arguments

Argument

Description

src_addr

dest

pointer to the destination buffer

size

length of data

allow_decrypt

If true and flash encryption is enabled, data on flash will be decrypted transparently as part of the read.

Return value

ESP_OK on success, ESP_ERR_FLASH_OP_FAIL on SPI failure, ESP_ERR_FLASH_OP_TIMEOUT on SPI timeout.

Notes

All of src, dest and size have to be 4-byte aligned.

References

Code

Location

Referrer

esp_err_t bootloader_flash_read(size_t src, void *dest, size_t size, bool allow_decrypt)

bootloader_flash.c:84

esp_err_t bootloader_flash_read(size_t src_addr, void *dest, size_t size, bool allow_decrypt);

bootloader_flash_priv.h:123

CHECK_ERR(bootloader_flash_read(data->start_addr, &data->image, sizeof(esp_image_header_t), true));

esp_image_format.c:493

process_image_header()

err = bootloader_flash_read(flash_addr, header, sizeof(esp_image_segment_header_t), true);

esp_image_format.c:548

process_segment()

CHECK_ERR(bootloader_flash_read(data->start_addr + data->image_len, &data->image_digest, HASH_LEN, true));

esp_image_format.c:891

process_appended_hash_and_sig()

CHECK_ERR(bootloader_flash_read(data->start_addr + unpadded_length, buf, length, true));

esp_image_format.c:945

process_checksum()

Call Tree

bootloader_flash_read() is called by 4 functions and calls 3 functions:

process_image_header()

process_segment()

process_appended_hash_and_sig()

process_checksum()

bootloader_flash_read()

esp_flash_encryption_enabled()

esp_flash_read_encrypted()

esp_flash_read()

Data Use

bootloader_flash_read():

bootloader_flash_read()

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