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stm32/flash: Implement WB55 flash locking.

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This is needed to moderate concurrent access to the internal flash, as
while an erase/write is in progress execution will stall on the wireless
core due to the bus being locked.

This implements Figure 10 from AN5289 Rev 3.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
This commit is contained in:
Jim Mussared
2020-11-04 15:29:31 +11:00
committed by Damien George
parent a64121b0d4
commit 119c88ef17
5 changed files with 121 additions and 4 deletions
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3
ports/stm32/rfcore.h
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@@ -35,6 +35,9 @@ void rfcore_ble_hci_cmd(size_t len, const uint8_t *src);
void rfcore_ble_check_msg(int (*cb)(void *, const uint8_t *, size_t), void *env);
void rfcore_ble_set_txpower(uint8_t level);
void rfcore_start_flash_erase(void);
void rfcore_end_flash_erase(void);
MP_DECLARE_CONST_FUN_OBJ_0(rfcore_status_obj);
MP_DECLARE_CONST_FUN_OBJ_1(rfcore_fw_version_obj);
MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(rfcore_sys_hci_obj);