CH32V003 Timer issue during Sleep

[corgon]

Hi,

I'm struggling with Tim2 not running during Sleep (WFI).
If I have activated the sleep mode, TIM2 in interrupt mode does not run.

Can you please take a look at what's wrong or what I've overlooked?

I really appreciate your advice.

Here is the complete compilable code:

Code: [Select]

#include "debug.h"
//#define SYSCLK_FREQ_8MHz_HSI 8000000 //Internal clock 8MHz

// Global Variables
u_int counter = 0;

// GPIO Settings
void GPIO_INIT(void){
    GPIO_InitTypeDef GPIO_InitStructure = {0};
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
    GPIO_Init(GPIOD, &GPIO_InitStructure);
}

// Timer TIM2 Setting and Interrupt setting                                            *
void TIM_INT_Init(u16 arr, u16 psc){
    TIM_TimeBaseInitTypeDef TIMBase_InitStruct;
    NVIC_InitTypeDef NVIC_InitStruct;
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
    TIMBase_InitStruct.TIM_Period = arr;
    TIMBase_InitStruct.TIM_CounterMode = TIM_CounterMode_Up;
    TIMBase_InitStruct.TIM_Prescaler = psc;
    TIMBase_InitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseInit(TIM2, &TIMBase_InitStruct);
    TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
    NVIC_InitStruct.NVIC_IRQChannel = TIM2_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 5;
    NVIC_InitStruct.NVIC_IRQChannelSubPriority = 5;
    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStruct);
    TIM_Cmd(TIM2, ENABLE);
}

// Main
    int main(void){
        NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
        SystemCoreClockUpdate();
        GPIO_INIT();
        Delay_Init();
        TIM_INT_Init(1000,10000); //(period, prescaller)

// Infinite loop
   while(1){
        Delay_Ms(10);
        PWR_EnterSTANDBYMode(PWR_STANDBYEntry_WFI); // Enter to Sleep Mode
        }
 }

// Timer TIM2 Interrupt Handler
void TIM2_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));

void TIM2_IRQHandler(void){
    if (TIM_GetITStatus(TIM2, TIM_IT_Update) == SET){
        counter++;
        if (counter >=3) {
         GPIO_WriteBit(GPIOD, GPIO_Pin_5, 1);
         Delay_Ms(500);
         GPIO_WriteBit(GPIOD, GPIO_Pin_5, 0);
         counter =0;
        }
       }
        TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
}

Thanks,

Corgon

[bikeNomad]

Have you tried not using the fast interrupt mode?

[eTobey]

Is the timer meant to be running in this sleepmode?