STM8 MCUs

Hi Team,I need some help to understand what I am doing is correct or wrong. A required guide from ST's expert Basically working on RTC temperature Drift compensation, so I have referred the RTC temperature compensation APP document from ST's The link provides: https://www.st.com/resource/en/application_note/an2604-stm32f101xx-and-stm32f103xx-rtc-calibration-stmicroelectronics.pdfI am using STM8AL3189 MCU, For RTC calibration, we have CALP = 1 *512Clock Pulse CALM = [8:0] ==> 0 to 0x1FFusing combination of CALP and CALM we can achieve up to 511 to 512 Clock pulsesQuestion 1 :Steps followed to calibrate the RTC temperature compensationRTC clock is 32768Hz, K = -0.04ppm/*c^2, To = 25*c, T = calculating from the inte

I cannot get interrupts to work and I found that NonHandledInterrupt is getting called. How do I find out what IRQ triggered a debug breakpoint at NonHandledInterrupt? I've stared at my code for hours and all it does is stare back.

I am using Stm8s003f3 in my own designed card. Using ST-LINK v2, I can assign code using SWIM and RESET pins. I'm getting an error when I want to upload more than one stm8 code using the same debugger. Is there a product or method that I can use to proces

I put the cosmic license in the wrong location, not in license folder. When I tried my first build in stvd it asked for license and I tried and tried in a loop. Eventually I got in a situation where it would just give the error in the log when I tried to build instead of asking for the license. How do I get it to ask again? Or is there another way to register the cosmic license file I have?

i have tried different frequencies , modes but no result.

I want decompile STM8S208 code file. File format is .S19. What should be the steps I should follow? 

Hi Sir/Mdm,Would like to know is there any solution for OTA (Over-the-Air) upgrade firmware for STM8?Regard'sJason

We’re using STM8S207RBT6C for our current production. Due to the on-going IC shortage matter, we're trying to source a alternatives that can directly working on our existing design without any hardware nor firmware changes. We were able to find some batch of “STM8S207RBT3CRT�?.We believe this higher temperature range product can be directly replace the current one without any Hardware and Firmware modifications. Would you please confirm this?Thank you very much,

I have configured the timer as below is its is correct and also in interrupt handler I am not getting time the values.static void TIM3_Config(void){ /* TIM3 configuration:  - TIM3CLK is set to 16 MHz, the TIM2 Prescaler is equal to 16 so the TIM2 counter  clock used is 16 MHz / 16 = 1 000 000 Hz - With 1 000 000 Hz we can generate time base:   max time base is 256us if TIM2_PERIOD = 255 --> (255 + 1) / 1 000 000 = 256us   min time base is 1us  if TIM2_PERIOD = 1  --> ( 1 + 1) / 1 000 000 = 2us - In this example we need to generate a time base equal to 10us  so TIM2_PERIOD = (0.000010 * 1000000 - 1) = 9 */   /* Time base configuration */ //TIM3_DeInit();//me  //TIM3_TimeBaseInit(TIM3_PRESCALER_16 , 9);   /* Config chan

Hi,We have a requirement of support for CAN Open and CAN J1939 on STM8AF5288T.We found a website: Simma Software which provides this support but we want to confirm if STM officially supports their CAN Open and CAN J1939 stacks for STM8.Kindly let us know if there are any other officially supported stacks and guide us through the same.Thanks.

I am a newbie into the world of embedded systems.is it possible to enable clock for ADC and TIM4 overflow update.``` CLK_DeInit();   CLK_LSICmd(DISABLE); // Use internal clock. CLK_HSICmd(ENABLE); while(CLK_GetFlagStatus(CLK_FLAG_HSIRDY) == FALSE); // Wait for clock to stabilize   CLK_SYSCLKSourceConfig(CLK_SYSCLKSource_HSI); CLK_PeripheralClockConfig(CLK_Peripheral_ADC1, ENABLE); CLK_PeripheralClockConfig(CLK_Peripheral_TIM4, ENABLE);```Last 2 lines are confusing me. I guess this code make TIM4 working and not ADC.pls help me.

Using the code fragment below I would expect the code to hang if it got an error during the clock switch or it actually switched to the LSI clock. But the test code keeps running and starts blinking an LED.    CLK_LSICmd(ENABLE);    CLK_ClockSwitchCmd(ENABLE);    if (SUCCESS != CLK_ClockSwitchConfig(        CLK_SWITCHMODE_AUTO,        CLK_SOURCE_LSI,        DISABLE,        CLK_CURRENTCLOCKSTATE_DISABLE))    {        for (;;) ;    }    if (CLK_GetSYSCLKSource() != CLK_SOURCE_HSI) for (;;) ;

Hello everyone, I am newbie, I want to use spi connection STM8 master with slave 16 bit IC. I have to write 16bit register to set the IC. How could I send 16 bit value to IC to set it with STM8, may you share some codes? best regards.

Hi Everyone I want to interface hef 4094B shift register with stm8s003k3. I understand the general working of the shift register but right now I am confused about how to send data to the pins of the shift register. It would be a great help if someone just gives me hint on how to send data on input pins of hef 4094b shift register Thanks

Dear all, I'm using STM8S207 MCU and ST-LINK V2 i need a clarify connection between MCU and ST-LINK as i connect pins as Ground, VCC, SWIM, RESET( NRST) pin but in STM32 ST-LINK Utility softare an error message appear when i press the ( connect to target ) button, please i need help !!! thanks

The divider voltage is increasing when divider is connected to ADC of STM8AL3146UCX. When it is disconnected from the ADC pin we are getting accurate voltage at the divider point.

Hello,I would like to program an STM8 with the STLINK-V3. The jumpers are set as in the manual. When you plug in the USB cable, there are two text folders.1. DETAILS.TXT -> Version: V3J7M2B4S1 Build: May 13 2020 17:07:492. FAIL.TXT -> The interface firmware FAILED to reset / stop the target MCUWhat does the "FAIL.TXT" file mean?It works with the STLINK-V2, but programming does not work with the STLINK-V3.Hello,I would like to program an STM8 with the STLINK-V3. The jumpers are set as in the manual. When you plug in the USB cable, there are two text folders.1. DETAILS.TXT -> Version: V3J7M2B4S1 Build: May 13 2020 17:07:492. FAIL.TXT -> The interface firmware FAILED to reset / stop the target MCUWhat does the "FAIL.TXT" file mean?It works with the STLINK-V2, but programming does not work with the STLINK-V3.

Hello All,We are designing a battery operated device for that we have selected STM8L051F3 MCU,For development we have ordered NUCLEO-8L152R8 board, and after wards we will port the same code for STM8L051F3 MCU. (Please help if any Better suggestions)With respect to the selected development Kit and MCU we have downloaded the following toolsSTM8CubeMXST Visual DevelopST Visual Programmer.I am somewhat familiar to STM32 tools (viz Atollic, STM32CubeMX), However i am new to STM8L development.Tough tools for the STM8L look similar i just would request you to please help we with any study or user guides if available for STM8L development, so that it helps me in my development.I also tried to search on ST Micro's website for the study material but i wasn't able to find the right content to start off with so I request you to plaese help me with the same.

Hi all,please suggest some solution for this,I am trying to produce 14.7khz PWM signal with below timer1 configuration for 16Mhz clock frequency and i am getting 14.53Khz to 14.83Khz.Why am i getting this frequency variation. Is ST timer can not produce exact output PWM frequency?F_CK_PSC(prescaler frequency) is 16Mhz and Timer1 configuration are as below.More than 1 timer channel have been used and all shows same frequency variation  // enable peripheral clock  CLK_PCKENR2_bit.PCKEN21 = 1;  // PWM Mode 1 (output low while TIM1_CNT < TIM1_CCR1); Output-Compare preload enable; CC1 output  TIM1_CCMR1 = 0x68;  // PWM Mode 1 (output low while TIM1_CNT < TIM1_CCR2); Output-Compare preload enable; CC2 output  TIM1_CCMR2 = 0x68;  // PWM Mode 1 (output low while TIM1_CNT < TIM1_CCR3); Output-Compare preload en

Hi everyone,I need your kind support for an issue regarding the micro STM8L050J3.In one of my project for a question of overall dimensions of the PCB (wearable device) I must necessarily use this 8-pin micro, but unfortunately I still need an extra I/O pin.So I know it is possible to use PA0, that by default is used for SWIM interface, remapping it via firmware after at least 5 seconds from programming, but my question is: how can I verify during debug with ST-LINK/V2, in real time, the functionality of the function used for PA0 mapped dome digital input with Pul-Up without creating conflicts?Is it possible? And if yes, in which way?Thanks a lot for any of Your relpy,Sisto Zànier

Hi,I have a problem with my STM8AF6213PDU custom board.The first time, I programmed sucessfully the board using ST Visual Programmer. The procedure was succesfully because I loaded a "blink firmware" and it's always working (ever with power on/off)Now I want to update my firmware but I'm not allowed to do it. I cannot estabilish connection neither with ST Visual Develop nor ST Visual Programmer.It's like a read/write protection but I can't disable it. I can not think about the "one shot possibility" because sounds to me impossible.Could someone help me? Is there a procedure that I'm missing?Thanks,Marco.

Hi, I'm new to STM8 (usually I develop from STM32) and I'd like to know how can I enable interrupts.In STM32, I usually configure the peripheral interrupt enable bit and also in the NVIC I enable the interrupt to pass it from peripheral to CPU.In STM8S I thought the approach was the same.I'm finding the peripheral interrupt enable (e.g. the interrupt enable for the timer on TIM1_IER register) but I'm not finding how to enable it (and if needed) from the CPU side.In addition, I read that at the end of the interrupt routine, a IRET instruction is required.Should I manage it? And how?By the way I'm using ST Visual Develop with COSMIC compiler and the CPU I'm referring to is the STM8S003K3.Is there a working example or simple explanations?EDIT: In the reference manual I also found#asm PUSH ISR_CC POP CC #endasmbut don't know what is ISR_CC

The data sheet for this part says that after power loss the HT bit is set, and any reads of the clock will return the time of the last read. Then after the HT bit is cleared one should be able to read the current time since the clock is battery backed (a super cap in this case). This works "sometimes", but often the time of the read just before power loss is obtained when the current time should be obtained. Usually there is help on the net, but I have been unable to find a solution. I'm pretty sure there is some trick I'm missing. Since I am unable to find any code examples on the net that try to recover from a power down, maybe you can help with an app note or a code example? AN1572 didn't give much more than the data sheet.I have included a code snippet which may be helpful.

Dear Friends,i am working with HC-12 module that have inbuilt STM8S003F3 Microcontroller with Si4463 Transceiver module. that works fine at data transmission. But i am trying to upload Arduino Sketch through HC12 Wirelessly for a long distance. here i need data ready pin (DTR) for enable the bootloader for sketch uploading but HC12 have only tx/rx and set pin. i search google about HC-12 details that shows some 5 AT commands and wire connections for serial data transmission so i can't get clear idea. that's why i ask question here.My Question: the STM8S003F3 microcontroller have any pin like a DTR or not.If anybody have any suggestion or solution about my problem please let me know,Thank youwith regardskannannatesh

I have bought a STL8L Discovery kit and have installed the example for showing a clock: RTC using LSE - but it drift appx. 5 seconds per minute.Seems like a simple 555 timer - or a cheap old analog clock - is more precise.