About AMacd.1

AMacd.1 · 2022-05-13

I am trying to get a pulse out of TIM2 in compare mode but I see no output. Here is my snippet of code:#include "iostm8l101f3.h" void main( void ) { CLK_CKDIVR = 0x01; // 8MHz PA_CR1 = 0xFF; // all pullups PB_DDR = 0x01; // 0000 0001...

AMacd.1 · 2022-04-30

I have this little project for the STM8L101F3 that just writes an arbitrary value to TIM2_CCR1H and TIM2_CCR1L and then tries to start the timer but I get nothing from the timer output.If I run the project with a debugger and inspect the contents of ...

AMacd.1 · 2022-04-22

AMacd.1 · 2022-04-22

1. What happens if TIM2_ARR is 0xFFFF? Does overflow occur when timer counter counts past 0xFFFF?2. What happens to compare output after TIM2 overflows? For example, lets say that the TIM2_CCR1 = 0x7FFF so the output changes state when the counter co...

AMacd.1 · 2022-03-15

AMacd.1 · 2022-05-13

i just answered my own question:The missing line was TIM2_BKR_MOE = 1;The other two lines I thought I needed were unnecessary.I updated the snippet so it shows the correct operations to get the timer output going.Hopefully, someone else will find thi...

AMacd.1 · 2022-05-06

Another point - I suppose that, if the application turns TA2 on and off periodically, then it would also be prudent to set PCKEN5 on and off accordingly to optimize the power consumption during the periods the timer is off. Right?

AMacd.1 · 2022-05-06

Sure that makes sense, I guess. Thanks for the additional explanation. By that logic, though, this issue would probably apply to any peripheral that needs a clock; for example, if the USART clock source isn't enabled, you won't be able to set up an...

AMacd.1 · 2022-05-06

@Tesla,Huh! Just like magic, with that line added, all of a sudden I can now see what I've written in the TIM2 registers!So, this seems to be the thing I was missing.I find it rather surprising that I can't even write to the registers with the clock...

AMacd.1 · 2022-05-06

@Tesla,Thanks for getting back to me.Yes STM8L101F3 has TIM2. Data sheet: https://www.st.com/resource/en/datasheet/stm8l101f3.pdfAs I said in latest edit of my question, I also am using an STM8L-Discovery board which also has TIM2 and seeing the sa...

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No output from TIM2 in compare mode on STM8L101F3

Unable to write to TIM2 Registers

How to I properly initialize the IO register bits connected to the SWIM pin? (The application does not use this pin for anything)

About TIM2 in compare mode: I have a few questions about what happens to the output when the timer counter overflows

On the STM8L101F1U, some IO port register bits do not have actual pins on the package. How should these register bits be initialized? Should I set them to input pullup, output or just input floating? Note: Part does NOT have COMP_REF.

Re: No output from TIM2 in compare mode on STM8L101F3

Re: Unable to write to TIM2 Registers

Re: Unable to write to TIM2 Registers

Re: Unable to write to TIM2 Registers

Re: Unable to write to TIM2 Registers