STM8 MCUs

Dear all,I am using STM8S103F2 in one of my design. I have two main missions in the code.1- Convert analog signal into digital and do some action according to voltage level.2- Catch an external interrupt in both falling and rising edges.I realized microcontroller misses some of rising or falling edges even interrupt is enabled. Actually, it catches most of edges but it also misses. (ADC and EXTI are active.). Then I realized when EXT interrupt comes at the same time with ADC interrupt or when program is in the ADC ISR, EXTI is missed. (I added some debug features to the code. When ADC Interrupt comes one of outputs is set and when RETI from ADC ISR the output pin is cleared. Similarly, when EXTI is serviced, another pin is set and reset. I gave a signal from signal generator 500Hz and 10% duty cycle) I attached two screenshots from scope. Second graph is zoomed view of first graph. Yellow signal is taken from Port D pin 6 which is use

Hello everyone,I recently bought a single STM8S105K4 to fiddle with. I've soldered it to a board and I'm trying to flash it using the stm8flash utility and an STLINKv2. I've made the following connections to the MCU: STLINK -- MCU RST -- PIN 6 (NRST) SWIM -- PIN 31 (SWIM) 3.3V -- PIN 11 (VDD) GND -- PIN 9 (VSS)Additionally there is a 470 nF ceramic capacitor between VCAP and VSS and a 100 nF one between VDD and VSS.Whenever I try running "stm8flash -c stlinkv2 -p stm8s105k4 -u" the command fails saying "tries exceeded", seemingly because it couldn't establish a connection with the MCU.Are my assumptions correct? Am I missing something?

Hi, this is the map file just before overflow.https://dumptext.com/x6lV7kAFHow can I read this file? Someone could please give me some insight?If a just add one more equation to the code it gets an overflow.I'm using this toolhttps://www.st.com/en/evaluation-tools/stm8svldiscovery.html

Hi,I have a code that is using STM8L151C6 MCU. I'm using the RTC to wake up periodically from Halt, but for some reason when I use SPI when I'm in RUN mode , after some duration the RTC stops generating the wakeup interrupt.when I comment the SPI procedure it all works well.Anyone have an ididea why this is happening?Thanks

Hi,I have one issue in the usage of download function with STM8L051F3,it is sometimes failed, and it made "protection error" with IAR embedded Workbench IDE,I update my schematic, please help to check it,thanks.

Hello,I wonder whether the size of hex file is over (has problem) or not,please help to let me know it with detailed information,when checking the size of hex file of my code, the size is 12 k bytes like picture,and when checking the datasheet of stm8l051f3, it supports only 8 k bytes flash memory,if so, my hex file can be issued after downloading, is it right ?thankful for your support in advance,thanks.

Hi all, I'm working on STM8S104kT6 mcu and I'm tring to get manage E2P.I have a couple of problems:1) EOP Bit is not set (it is always in reset state) even after a writing2) I can't lock E2P (or flash): PUL & DUL bits in FLASH_IAPSR Register are aways set. This happens from MCU reset even if datasheet says they should set to zero by default (flash & E2P protected). If I force them manually, for esample resetting DUL from IAR, the next programming step they are set again.I tried with standard peripheral library and by setting values in registers (and, as i told before, I also forced them manually from IDE).Any ideas?Thanks a lot!

I'm using the STM8S208 for a project that requires use of 11 ADC channels. I've noticed that the measured readings are inaccurate. Is there something I can do in my circuitry to make it more accurate? Or should I just buy a dedicated ADC IC?I have a 5V reference, filtered from the board 5V supply with a ferrite bead.My ADC settings: fCPU/2 prescaler, Schmitt trigger disabledTest circuit using a 10k pot to generate a variable voltage. Measuring it with a DMM and tying the voltage to ADC2_CHANNEL_9Input voltage on channel, measured by DMM - 2.316VRange of ADC measurements - 2.200V --> 2.356VInput voltage on channel, measured by DMM - 0.656VRange of ADC measurements - 0.468V --> 0.720VInput voltage on channel, measured by DMM - 4.548VRange of ADC measurements - 3.376V --> 4.000V

I am new to stm8s001j3 and trying to debugg a program. when I am trying to debugg a program error appears i.e. " connection error [30006]. I am using ST Visual Develpoer and using ST-Linlk / V2. Please help me out with this problem. i have attached the pic of the error below.

Hello everyone,I am trying to debug STM8 using ST-LINK USB tool, but facing error while debugging. Due to that I am unable to debug.Micro controller and hardware is perfectly OK, because I am trying in those hardware in which it was previously working.Error I am facing is attached as an image file. Kindly check and suggest some troubleshooting method.

Where I can get the sample codes for STM8AF modules. Else please share some basic examples based on CAN implementation.

Posted on March 01, 2011 at 11:28Hello Friends,  I am a newbie to the world of microcontroller programming. I am stuck with a deadlock and am not able to move even a bit. The BUSY bit in I2C.SR3 is set it is not getting freed, according to datasheet it can be set only Hardware, it is also listed in errata list to be solved in future versions. I tried unplugging & plugging the board  again it worked in one or two instances, I am tired of doing this again and again with no success - it is completely undeterministic. Please help my way out Regards, Raghavendra #i2c-busy-bit-set

Is there a way to keep the low level state when changing the GPIO output to input mode?

now i use the latest stvd, and there is no possibility to debug .there is always Connection error (usb://hti1): swim error [30200]: st-link connection erroror the error : gdi-error [40201] can't access configuration database.i have all those "regsvr32 " tryed, NONE solve it.what is the reason of not working stvd in windows10 -64why is there not a 64bit stvd that works?please can some one help me with the real solution.?many thanks

I am having trouble to find this component library

I've now bricked 3 of these (or at least made them unable to be programmed over SWIM,) and the last one happened after I un-commented these two lines of code:TIM2_IER = 1; // Enable update interrupts TIM2_CR1 = 1; // enable timerThis shouldn't do anything with the SWIM pin, right? It was the only change between the previous, non-bricking flash and this one.Also, I do have a 5 second delay after startup and clock setup, which was supposed to protect me from this situation, but...

The problem is, the channel0 works fine, and keeps reading the data as it should be, but the channel 1 just reads the data once. So I keep watching the data changing in one channel, but in the other one it keeps like it is.There is any problem with my code? I've tested the Multi channel code example that you guys published some time ago, and this one do not works also (it kinda freezes the micro).The full code for the main archive is shown bellow.#include "STM8S.h"unsigned int value = 0x00;unsigned char n = 0x00;unsigned char seg = 0x01;const unsigned char num[0x0A] =  {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};void GPIO_setup(void);void clock_setup(void);void TIM4_setup(void);void ADC1_setup(void);void main(void){ unsigned int A0 = 0x0000; unsigned int A1 = 0x0000; &nb

Hello everyone,How to choice the best pin for ADC input, with lowest noise or/and serial resistance?Thanks.

Hi all.I'm trying to implement printf retargeting in my project, based on STM8S105 microcontroller.I'm using IAR (3.10 & 2.20) and I'm utilizing printf retargeting example from ST. The problem is, if I try to compile the project with "Discard unused publics" option enabled, it stops working.When I enable "Discard unused publics" option, I don't see any errors or warnings. I even decided to load original example from ST, and got the same results: with "Discard unused publics" option enabled retargeting stops working.Can anyone give an Idea, what can cause such a problem?Part of code, related to retargeting:#ifdef _RAISONANCE_#define PUTCHAR_PROTOTYPE int putchar (char c)#define GETCHAR_PROTOTYPE int getchar (void)#elif defined (_COSMIC_)#define PUTCHAR_PROTOTYPE char putchar (char c)#define GETCHAR_PROTOTYPE char getchar (void)#else /* _IAR_ */#define PUTCHAR_PROTOTYPE

I am trying to run timer interrupt in STM8 microcontroller. But I am not able to do so.Here is the code snippet. void TIM2_Configuration(void) { TIM2_DeInit(); CLK_PeripheralClockConfig(CLK_PCKENR1_TIM2, ENABLE); TIM2_ARRPreloadConfig(ENABLE); TIM2_TimeBaseInit(TIM2_Prescaler_128, TIM2_CounterMode_Down, 500); TIM2_ITConfig(TIM2_FLAG_Update, ENABLE); TIM2_Cmd(ENABLE); enableInterrupts(); }and enabling Clock peripheral in main function:CLK_PeripheralClockConfig(CLK_Peripheral_TIM2, ENABLE);and added a keyword @svlreg (as facing  @svlreg missing for interrupt) in Interrupt Handler where I have added the interrupt code: @svlreg INTERRUPT_HANDLER(TIM2_UPD_OVF_TRG_BRK_USART2_TX_IRQHandler, 19)I tried to read the counter Register and ARRP, but after loading the value as well both registers had the initial value, not the loaded one.again I tried to c

No attempt yet to initialize can, just adding entry into interrupt vector table table for either can rx or can tx impacts TIM4_UPD_OVF_IRQHandler. TIM4 will run twice, then never run again.Can interrupts are not enabled yet, can interrupt vector never occurs.

TN1235, released this month has some basic information on the new STLINK-V3 (which already can be ordered at some distributors, but lead times are long, and where there are pictures they show the older ST-LINK/V1)According to TN1235, for the SWIM interface (and thus for using STLINK-V3 with STM8) one needs some adapter board called MB1440. I found no mention of MB1440 outside of TN1235.When will STLINK-V3 and MB 1440 become available?Philipp

Hello,I am using the stm8l151... mcu and I am trying to send different strings via Uart1 to HTerminal. I have three different strings to send. The first two strings are transmitted completely but when the third one is being sent, it is truncated and it starts to send the first and second string again and repeatedly.I have attached the output from Hterm (uart_com) for better understanding and also some parts of my code(uart transmit and uart_init)Just for better understanding of the attached output, the strings(cmd 1, 2 and 3) are at+nrb, at+cfun=1, and at+cops=1,2,"26201"Please Any suggestions will be greatly appreciated.:smiling_face_with_smiling_eyes: void nbiot_buf_transmit(void){ PAL_UART1_RX_DISABLE(); PAL_UART1_TX_ENABLE(); for(int i=0 ; i < sizeof(cmd1);i++){ USART_SendData8(USART1,((uint8_t)cmd1[i])); while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET); }

Dear current and future SDCC users among the STM8 developers,Today the first Release Candidate (RC1) for SDCC 3.8.0 has been created.As always it has been put online in our SourceForge File section.https://sourceforge.net/projects/sdcc/files/If you have the time, please verify it and report back with the positiveor negative results.In previous release 3.7.0, no binaries were released. 3.8.0 has binariesgain, though the list of binary platforms changed. For 3.8.0, binariesare released for GNU/Linux on amd64, Windows on amd64, macOS on amd64,Windows on x86.There have been various improvements, both features and bug fixessince SDCC 3.7.0. The full ChangeLog is at

Posted on July 04, 2018 at 16:16In this code,I understand the line''EXTI_SetExtIntSensitivity(EXTI_PORT_GPIOB , EXTI_SENSITIVITY_FALL_ONLY);''It means EXTI detects falling edge, right?But what's the next line means??''EXTI_SetTLISensitivity(EXTI_TLISENSITIVITY_FALL_ONLY);'' I read the reference manual about EXTI section but there is no enough information about TLIS..