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JayD · 2019-07-10

I'm using an old STM32F103RD with SPL v3.6.1. I'm confused with the value to put in TIM1_CCRx for a giving PWM frequency.Looking at \STM32Cube_FW_F1_V1.7.0\Projects\STM32F103RB-Nucleo\Examples_LL\TIM\TIM_PWMOutput\Src\main.c: /* Set compare value to ...

JayD · 2019-07-10

Clive's answer is confirmed in AN2580 - STM32F10xxx TIM1 application examples.pdf.@JW Thank you for the edge vs center aligned clarification.

JayD · 2019-07-10

With this line:str R1,[R0,0x0C] //enable the interrupt || TIM2_DIERYou have set the CC2IE & CC3IE, but it seems you have not write any value in TIM2->CCR2.I suggest that you active the UIE (TIM2 update interrupt) and see if the it trigger TIM2_IRQHan...

JayD · 2019-07-10

Thank you for the quick answer Clive!That's what I tought also before seeing "useful formula" slide from STM32F7 webinar which confuse me.From the reference manual of STM32F10x (see screen capture), there seems to be a slight difference for Always On...

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