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Change BT flash storage default for rp2350 A2 (#2412)

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The workaround for errata RP2350-E10 overwrites the last block in flash.
This will overwrite the BT flash storage causing a paired BT connection
to fail. Move the default flash storage location to 3 sectors from the
end of flash for RP2350 where A2 support is required.

This will require existing BT pairings to a Pico device to be removed
and readded.

Fixes #2322
This commit is contained in:
Peter Harper 2025-04-11 17:22:20 +01:00 committed by GitHub
parent 1721f9db47
commit 6fea77f584
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1 changed files with 10 additions and 2 deletions
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12
src/rp2_common/pico_btstack/include/pico/btstack_flash_bank.h
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@ -20,16 +20,24 @@ extern "C" {
#define PICO_FLASH_BANK_TOTAL_SIZE (FLASH_SECTOR_SIZE * 2u)
#endif
// PICO_CONFIG: PICO_FLASH_BANK_STORAGE_OFFSET, Offset in flash of the Bluetooth flash storage, type=int, default=PICO_FLASH_SIZE_BYTES - PICO_FLASH_BANK_TOTAL_SIZE, group=pico_btstack
// PICO_CONFIG: PICO_FLASH_BANK_STORAGE_OFFSET, Offset in flash of the Bluetooth flash storage, type=int, default=PICO_FLASH_SIZE_BYTES - FLASH_SECTOR_SIZE - PICO_FLASH_BANK_TOTAL_SIZE on RP2350 otherwise PICO_FLASH_SIZE_BYTES - PICO_FLASH_BANK_TOTAL_SIZE, group=pico_btstack
#ifndef PICO_FLASH_BANK_STORAGE_OFFSET
#if PICO_RP2350 && PICO_RP2350_A2_SUPPORTED
#define PICO_FLASH_BANK_STORAGE_OFFSET (PICO_FLASH_SIZE_BYTES - FLASH_SECTOR_SIZE - PICO_FLASH_BANK_TOTAL_SIZE)
#else
#define PICO_FLASH_BANK_STORAGE_OFFSET (PICO_FLASH_SIZE_BYTES - PICO_FLASH_BANK_TOTAL_SIZE)
#endif
#endif
/**
* \brief Return the singleton BTstack HAL flash instance, used for non-volatile storage
* \ingroup pico_btstack
*
* \note By default two sectors at the end of flash are used (see \c PICO_FLASH_BANK_STORAGE_OFFSET and \c PICO_FLASH_BANK_TOTAL_SIZE)
* \note By default, two sectors near the end of flash are used.
* For RP2350 when PICO_RP2350_A2_SUPPORTED is true, two sectors that are three sectors from the end of flash are used.
* This keeps the last sector free for a workaround for chip errata RP2350-E10. See the RP2350 datasheet for more details about this.
* Otherwise, two sectors directly at the end of flash are used.
* See \c PICO_FLASH_BANK_STORAGE_OFFSET and \c PICO_FLASH_BANK_TOTAL_SIZE)
*/
const hal_flash_bank_t *pico_flash_bank_instance(void);