解决GD32F105休眠后无法唤醒的问题 |
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解决GD32F105休眠后无法唤醒的问题
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由于去年的缺芯潮，原本基于STM32F105的设备需要pin对pin换成GD32F105。代码直接使用的ST库微修改。 设备装在重柴车上，开始一两个月是没啥问题的。后面出现了休眠后无法唤醒的问题。设置stop模式前，振动传感器中断引脚和CAN的RX引脚设置为外部中断。结果都无法唤醒。使用ST时，不会出现这个问题。 和GD的FAE现场调试，最终确认问题出在stop休眠函数上。 而且在GD的官网上，找到了一份《关于 deep-sleep 模式的使用说明》，GD32系列MCU都有这个问题？？？也是挺无语的。 原ST的stop函数如下： void PWR_EnterSTOPMode(uint32_t PWR_Regulator, uint8_t PWR_STOPEntry) { uint32_t tmpreg = 0; /* Check the parameters */ assert_param(IS_PWR_REGULATOR(PWR_Regulator)); assert_param(IS_PWR_STOP_ENTRY(PWR_STOPEntry)); /* Select the regulator state in STOP mode ---------------------------------*/ tmpreg = PWR->CR; /* Clear PDDS and LPDS bits */ tmpreg &= CR_DS_MASK; /* Set LPDS bit according to PWR_Regulator value */ tmpreg |= PWR_Regulator; /* Store the new value */ PWR->CR = tmpreg; /* Set SLEEPDEEP bit of Cortex System Control Register */ SCB->SCR |= SCB_SCR_SLEEPDEEP; /* Select STOP mode entry --------------------------------------------------*/ if(PWR_STOPEntry == PWR_STOPEntry_WFI) { /* Request Wait For Interrupt */ __WFI(); } else { /* Request Wait For Event */ __WFE(); } /* Reset SLEEPDEEP bit of Cortex System Control Register */ SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP); }修改后： //GD32F105 void GD_PWR_EnterSTOPMode(uint32_t PWR_Regulator, uint8_t PWR_STOPEntry) { uint32_t tmpreg = 0; static uint32_t reg_snap[ 4 ]; /* Check the parameters */ assert_param(IS_PWR_REGULATOR(PWR_Regulator)); assert_param(IS_PWR_STOP_ENTRY(PWR_STOPEntry)); /* Select the regulator state in STOP mode ---------------------------------*/ tmpreg = PWR->CR; /* Clear PDDS and LPDS bits */ tmpreg &= CR_DS_MASK; /* Set LPDS bit according to PWR_Regulator value */ tmpreg |= PWR_Regulator; /* Store the new value */ PWR->CR = tmpreg; /* Set SLEEPDEEP bit of Cortex System Control Register */ SCB->SCR |= SCB_SCR_SLEEPDEEP; reg_snap[ 0 ] = (*(volatile uint32_t *)(0xE000E010));//REG32( 0xE000E010 ); reg_snap[ 1 ] = (*(volatile uint32_t *)(0xE000E100));//REG32( 0xE000E100 ); reg_snap[ 2 ] = (*(volatile uint32_t *)(0xE000E104));//REG32( 0xE000E104 ); reg_snap[ 3 ] = (*(volatile uint32_t *)(0xE000E108));//REG32( 0xE000E108 ); (*(volatile uint32_t *)(0xE000E010)) &= 0x00010004; //( 0xE000E010 ) (*(volatile uint32_t *)(0xE000E180)) = 0XFF7FF83D; //( 0xE000E180 ) (*(volatile uint32_t *)(0xE000E184)) = 0XBFFFF8FF; //( 0xE000E184 ) (*(volatile uint32_t *)(0xE000E188)) = 0xFFFFFFFF; //( 0xE000E188 ) /* Select STOP mode entry --------------------------------------------------*/ if(PWR_STOPEntry == PWR_STOPEntry_WFI) { /* Request Wait For Interrupt */ __WFI(); } else { /* Request Wait For Event */ __SEV(); __WFE(); __WFE(); } (*(volatile uint32_t *)(0xE000E010)) = reg_snap[ 0 ] ; (*(volatile uint32_t *)(0xE000E100)) = reg_snap[ 1 ] ; (*(volatile uint32_t *)(0xE000E104)) = reg_snap[ 2 ] ; (*(volatile uint32_t *)(0xE000E108)) = reg_snap[ 3 ] ; /* Reset SLEEPDEEP bit of Cortex System Control Register */ SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP); }注意，使用GD芯片时，stop函数前，需要关闭滴答定时器，stop函数后再打开。 修改后运行了几个月，暂未再重新出现问题。 |
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