27 lines
685 B
C
27 lines
685 B
C
#include "boot_port.h"
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#include "stm32g4xx_hal.h"
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#define REQUEST_MAGIC 0x42555342UL
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static uint32_t reset_at;
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static bool reset_pending;
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static void backup_access(void)
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{
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__HAL_RCC_PWR_CLK_ENABLE();
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HAL_PWR_EnableBkUpAccess();
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__HAL_RCC_RTCAPB_CLK_ENABLE();
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}
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bool g474_boot_requested(void)
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{
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bool requested;
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backup_access(); requested = TAMP->BKP0R == REQUEST_MAGIC;
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TAMP->BKP0R = 0; return requested;
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}
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void g474_request_boot(uint32_t now)
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{
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backup_access(); TAMP->BKP0R = REQUEST_MAGIC;
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reset_at = now + 500; reset_pending = true;
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}
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void g474_reset_poll(uint32_t now)
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{
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if (reset_pending && (int32_t)(now - reset_at) >= 0) NVIC_SystemReset();
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}
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