Timer 8 not working STM32103RD?

[sonhai26988]

Posted on May 06, 2011 at 08:33

Timer 8 not working STM32103RD?

[Tesla DeLorean]

Posted on May 17, 2011 at 14:33

The simulator? or a real part? I don't think I'd take the simulator as an authoritative reference.

BTW you need to modifiy your period : TIM_TimeBaseStructure.TIM_Period = 2000 - 1; // 0 .. 1999

[Tesla DeLorean]

Posted on May 17, 2011 at 14:34

The above code has been tested to generate 2 KHz (50/50) signal on PC.06 using TIM8, on an STM32F103ZE.

[sonhai26988]

Posted on May 17, 2011 at 14:34

Both of them don't work.

Could you try making one project with timer 8 and see what happen?

If I replace the word 'TIM8'='TIM1' in my code that works, but 'TIM8' not.

Thanks. ^^

[Tesla DeLorean]

Posted on May 17, 2011 at 14:34

The STM32's (Medium Density) I have at hand only have 7 timers, the following code should be viable :

void RCC_Configuration(void) {     // clock for GPIO     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);     // clock for TIM8     RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8, ENABLE); } /**************************************************************************************/ void GPIO_Configuration(void) {     GPIO_InitTypeDef GPIO_InitStructure ;   // PC.06 TIM8_CH1     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;     GPIO_Init(GPIOC, &GPIO_InitStructure); } /**************************************************************************************/ void TIM8_Configuration(void) {     TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;     TIM_OCInitTypeDef TIM_OCInitStructure;     TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1;  // 72 MHz / 72 = 1 MHz     TIM_TimeBaseStructure.TIM_Period = 500 - 1; // 1 MHz / 500 = 2 KHz     TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;     TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;     TIM_TimeBaseInit(TIM8, &TIM_TimeBaseStructure);     // Channel 1 configuration = PC.06 TIM8_CH1     TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;     TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;     TIM_OCInitStructure.TIM_Pulse = (TIM_TimeBaseStructure.TIM_Period + 1) / 2; // 50% Duty     TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;     TIM_OC1Init(TIM8, &TIM_OCInitStructure);     // turning on TIM8 and PWM outputs     TIM_Cmd(TIM8, ENABLE);     TIM_CtrlPWMOutputs(TIM8, ENABLE); } /**************************************************************************************/ int main(void) {   RCC_Configuration();   GPIO_Configuration();   TIM8_Configuration();   while(1); }

[sonhai26988]

Posted on May 17, 2011 at 14:34

I try your code but I got the same result.

When I debug by keil. The TIM8_CNT not increase.

Your project run in real work?

[sonhai26988]

Posted on May 17, 2011 at 14:34

Here my code. 

Thanks for helping...

[Tesla DeLorean]

Posted on May 17, 2011 at 14:34

I try your code but I got the same result.

Maybe your part marking is wrong, and you don't have a high density part. The parts with 7 timers aren't going to work with TIM8. This code works with STM3210E board, with a STM32F103ZE. I didn't look at the registers, I stuck a scope on PC.06 and confirmed the frequency. Counter working. QED

[sonhai26988]

Posted on May 17, 2011 at 14:34

Thanks for your reply!

First the stm32f103rd is the high-density device.

The second is I don't have the STM3210E board, I have just debug with keiln and observe the register.

I will check by oscilloscope later.

[Tesla DeLorean]

Posted on May 17, 2011 at 14:34

First the stm32f103rd is the high-density device.

I am aware of that. That's why I suggested it is marked wrong (counterfeit, fake, remarked, whatever). If you enable TIM8 in the APB, and you can't read/write registers successfully, then the part does not have an operational TIM8.