STM8 MCUs

Discuss STM8 microcontrollers, including SWIM, USART configurations, RTC usage, ADC issues, and debugging.

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What causes CSR.HSIT to not be set during SWIM initialization?

Our implementation of the SWIM protocol expects the "HSI clock is trimmed" bit in the SWIM CSR to be set after initialization. As UM0470 states, "At the end of the option byte loading, the HSIT bit in the SWIM_CSR is set by hardware."In a test with S...

dvanb by Associate
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Resolved! What is the MSL of STM8S105K6T6C? Is it 2 or 3?

Hello,We have STM8S105K6T6C parts with same COO = Malaysia and same date code but some have MSL listed as 2 on the manufacturing label and the others have 3 as MSL. The question is which MSL is the correct one or they are both correct? I couldn't fin...

THoan.3 by Associate
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why STVD is getting crash frequently

Hi,I am using window 10 version. Initially STVD was working well. Now from few days its not working. Automatically workspace get deleted, not generated. STVD starts not responding error. Automatically get closed. I am using COSMIC compiler.Then later...

Ajadh.1 by Associate II
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Not able to vary duty cycle and frequency of pwm

Hi,I am using STM8S105c6 , I have used timer1 software interrupt, to generate PWM. but I am not able yo control it, not duty cycle not frequency plz check code give and correct me.Thanks in Advance/* * BMSBattery S series motor controllers firmware *...

Ajadh.1 by Associate II
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Timers - should I "wait" before updating ARR after UEV?

Hi =) Short version: should there be time (cycles) between updating ARR/CCR registers and generating an update event by setting the UG bit in TIMx_EGR?Long version:I am using one timer, which is automatically enabled (triggered) by another timer.I ma...

SLasn.1 by Senior
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Not Able to toggle GPIO

Hello Dear,I am using STM8S105C6 microcontroller and want to toggle the GPIO, But I am not able to do this.Will you please help

Ajadh.1 by Associate II
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Getting out of interrupts stop the software from running.

I'm using STM8AF5288 and the COSMIC as my IDE.Everything working great accept for interrupts using.The interrupt are being fired as I accept but on returning from the interrupt the PC is out of the program memory addresses.It is happening with extern...

Ofer by Associate III
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delay not occuring

I am trying to generate a delay in STM8s103 using Timer peripheral TIM2.but on equating the values to the Prescaler register(PSCR) and ARR. that is not happeninglike I debugged my code step by step and on seeing the values of TIM2 registers, they ar...

0693W000008GUM1QAO.png
KGupt.1 by Associate III
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Implement oversampling.

HI guys, i am using stm8s003f3.which have 10bit adc but my application count is more than 1024.so i am looking for some sample code of oversampling to reduce my adc step size.if anyone have any sample or reference plzz do suggest n tell me how to imp...

MAnsa.1 by Associate II
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