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application: fix backup writing

This commit is contained in:
King Kévin 2020-01-09 15:07:47 +01:00
parent 73bbb7974d
commit 4fa37f4957
1 changed files with 5 additions and 2 deletions
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7
application.c
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@ -1638,7 +1638,7 @@ void main(void)
DBGMCU_CR |= DBGMCU_CR_SLEEP; // allow debug also in sleep mode (keep clock powered)
#else
RCC_APB1ENR |= RCC_APB1ENR_BKPEN | RCC_APB1ENR_PWREN; // enable access to power register
if (RCC_CSR & RCC_CSR_IWDGRSTF && 0x22 == BKP_DR1) { // we have been woken up by independent watchdog but actually want to stay in standby mode
if (RCC_CSR & RCC_CSR_IWDGRSTF && 0x00ff == BKP_DR1) { // we have been woken up by independent watchdog but actually want to stay in standby mode
RCC_CSR |= RCC_CSR_RMVF; // clear reset flags
// the reset will have clearer the software set watchdog
standby(); // go to standby (e.g. shut down)
@ -1646,7 +1646,9 @@ void main(void)
// setup watchdog to reset in case we get stuck (i.e. when an error occurred)
iwdg_set_period_ms(WATCHDOG_PERIOD); // set independent watchdog period
iwdg_start(); // start independent watchdog
PWR_CR |= PWR_CR_DBP; // disable backup domain write protection
BKP_DR1 = 0; // clear backup register to not indicate we want to stay in stand by
PWR_CR &= ~PWR_CR_DBP; // enable backup domain write protection
#endif
board_setup(); // setup board
@ -1954,7 +1956,8 @@ test_end:
} // !interactive
while (!interactive && rtc_get_counter_val() >= last_connect_time + SHUTDOWN_TIMEOUT) { // time to shut down
#if !DEBUG
BKP_DR1 = 0x22; // indicate we want to stay in standby mode (it's not possible to disable the independent watchdog and it will reset the system even in standby mode
PWR_CR |= PWR_CR_DBP; // disable backup domain write protection
BKP_DR1 = 0x00ff; // indicate we want to stay in standby mode (it's not possible to disable the independent watchdog and it will reset the system even in standby mode
#endif
display_off(); // cut power to displays (at stop D+ pull-up to indicate disconnect)
standby(); // go into standby mode (shut down)