83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
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#include "drv_clk.h"
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#include "drv_misc.h"
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#include "kit_debug.h"
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#define EXTI_Line16 ((uint32_t)0x10000)
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#define PWR_FLAG_PVDO ((uint32_t)0x00000004)
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#define PWR_CR_PVDE_POS ((uint32_t)0x00000010)
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#define PWR_PVDLevel_2V9 ((uint32_t)0x000000E0)
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//设置优先级和使能中断
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void drv_misc_set_nvic(int8_t irq_channel, uint8_t priority)
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{
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KIT_ASSERT_PARAM((irq_channel > -15) && (irq_channel < 90) && (priority < 16));
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priority = (priority & 0x0F) << 4;
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if(irq_channel > 0)
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{
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NVIC->IP[irq_channel] = priority;
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/* Enable the Selected IRQ Channels */
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NVIC->ISER[irq_channel >> 0x05] = (uint32_t)0x01 << (irq_channel & (uint8_t)0x1F);
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}
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else
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{
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SCB->SHP[((uint32_t)(irq_channel) & 0xF)-4] = priority;
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}
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}
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//只复位内核，外围设备状态不变
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void drv_misc_reset_core(void)
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{
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__set_FAULTMASK(1); // 关闭所有中断
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SCB->AIRCR = ((0x5FA << SCB_AIRCR_VECTKEY_Pos) |
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(SCB->AIRCR & SCB_AIRCR_PRIGROUP_Msk) | /* Keep priority group unchanged */
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SCB_AIRCR_SYSRESETREQ_Msk);
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__DSB(); /* Ensure completion of memory access */
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while(1); /* wait until reset */
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}
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//复位内核及MCU所有外设
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void drv_misc_reset_mcu(void)
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{
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__set_FAULTMASK(1); // 关闭所有中断
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NVIC_SystemReset(); // 复位
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}
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NoArgFuncCall pwr_off_call;
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void drv_misc_cfg_pwr_off_interrupt(uint8_t priority, PwrOffVolt volt, NoArgFuncCall int_call)
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{
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KIT_ASSERT_PARAM(int_call != NULL);
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if(int_call != NULL)
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{
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pwr_off_call = int_call;
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drv_misc_set_nvic(PVD_IRQn, priority);
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RCC->APB1ENR |= RCC_APB1Periph_PWR;
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PWR->CR |= ((volt << 5) | PWR_CR_PVDE_POS);
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//clears the pending bits
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EXTI->PR |= EXTI_Line16;
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EXTI->RTSR |= EXTI_Line16; //上升沿促发，PVDO输出与上下电相反
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EXTI->IMR |= EXTI_Line16;
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}
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}
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void PVD_IRQHandler(void)
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{
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EXTI->PR |= EXTI_Line16;
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//VDD/VDDA低于由PLS[2:0]选定的PVD阀值
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if((PWR->CSR & PWR_FLAG_PVDO) != 0)
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{
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__disable_irq();
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//关闭时钟减小功耗
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RCC->APB2ENR = 0;
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RCC->APB1ENR = 0;
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pwr_off_call();
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// KIT_DEBUG_PRINTF("%s\r\n", "Poweroff");
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}
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}
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