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bl: add unlock sequence

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This commit is contained in:
Alexander Lerach 2025-08-19 17:43:49 +02:00
parent 6934bc908e
commit d95ce32ff7
1 changed files with 22 additions and 1 deletions
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23
platforms/nuttx/src/bootloader/common/bl.c
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@ -80,7 +80,7 @@
// RESET finalise flash programming, reset chip and starts application
//
#define BL_PROTOCOL_REVISION 5 // The revision of the bootloader protocol
#define BL_PROTOCOL_REVISION 6 // The revision of the bootloader protocol
//* Next revision needs to update
// protocol bytes
@ -158,6 +158,8 @@
static uint8_t bl_type;
static uint8_t last_input;
static int unlock_seq[] = { 0x93, 0x7C, 0xA1, 0x4E, 0x5D, 0xF0, 0xB5, 0x68 };
int get_version(int n, uint8_t *version_str)
{
int len = strlen(BOOTLOADER_VERSION);
@ -626,6 +628,8 @@ bootloader(unsigned timeout)
volatile uint32_t bl_state = 0; // Must see correct command sequence to erase and reboot (commit first word)
uint32_t address = board_info.fw_size; /* force erase before upload will work */
uint32_t first_word = 0xffffffff;
uint32_t unlock_idx = 0;
bool bl_locked = true;
/* (re)start the timer system */
arch_systic_init();
@ -664,6 +668,23 @@ bootloader(unsigned timeout)
bool full_erase = false;
if (bl_locked) {
if (unlock_seq[unlock_idx] == c) {
unlock_idx++;
sync_response();
} else {
unlock_idx = 0;
invalid_response();
}
if (unlock_idx >= sizeof(unlock_seq)) {
bl_locked = false;
}
continue;
}
// handle the command byte
switch (c) {