STM8 MCUs

Posted on August 24, 2016 at 09:39I Encounter a strange problem when using ''st visual develop'':  Yestoday everything was normal. But today when press ''start debugging'' button in my STVD project, STVD Stops Working and collapses。  I am using Window 10.  Anybody knows how to solve this? Many thanks!

Posted on January 24, 2017 at 01:21Hello, I'm facing a very embarrasing problem with variables in ST visual develop.When I add a breakpoint just before a function call and I hover the parameter being sent with my mouse I can see it. But when I step into the function, the parameter became wrong : it has totally random values.Also when the mcu has to do calculations, it can do it wrong.This kind of calculation can be wrong :result = (uint16_t)((sqrt((float)sum / measures_nb) / 1023.0 * 3.3 / 0.1) * 1000);If I do this with another compiler, the result is correct.I disabled all optimisations except +split because without this I get a .text overflowIf someone can help, I appreciate.Thanks

Posted on December 15, 2016 at 19:47Hello, I am using stm8s003f3 and I wanted to count with 1 ms of precision and it works well.I use a prescaler of 128 and a period of 125 and if I use my delay function with 1000 as parameter, I get the second.However if I use a prescaler of 16 and period of 1, normally I get 1 �s precision but my delay function with 1000000 is logically 1 second too but it's +- 7sI don't know what I'm doing wrong so if someone can help me.My main.c http://pastebin.com/TgheG5gfstm8_interrupt_vector.c http://pastebin.com/izX7cEVUThanks !#tim4 #timer

Posted on January 18, 2017 at 17:31i need your help about drive micro SD card with STM8L101F3P6i use the library of Eval-Board of STM8l151 for thisand i have no error in compile Code but the stm failed in initalize routine of SD and can not init this.So the MCU cant write data on SD Cardwhat Capacity of SD i can use.#stm #stm8l101xx #stm8l151c6t6 #sd-card

Posted on January 12, 2017 at 15:39I have the problem with I2C comunication.I programmed two STM8S-Discovery with example firmware available in C:\Users\u.iaquinta\Downloads\en.stsw-stm8069\STM8S_StdPeriph_Lib\Project\STM8S_StdPeriph_Examples\I2C\I2C_TwoBoards\I2C_DataExchangeOne discovery is master and the second discovery is slave.Rp1 and Rp2 is 10 K.The interrupt I2C not start.The master firmware is:void main(){   /* system_clock / 1 */   CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1);  /* I2C Initialize */  I2C_Init(I2C_SPEED, 0xA0, I2C_DUTYCYCLE_2, I2C_ACK_CURR, I2C_ADDMODE_7BIT, 16);&nb

Posted on January 16, 2017 at 16:16I've noticed that in the STM8S standard peripheral libraries, in the UART1_Init function there is an assertion checking the baud setting:assert_param(IS_UART1_BAUDRATE_OK(BaudRate));Digging into stm8_uart1.h, the default baud setting for macro IS_UART1_BAUDRATE_OK is 625000 but UART1 is capable of up to 1Mbaud based on the datasheet (right?) I need to run it at 750kbaud and commenting that assertion out I got it working at 750kbaud without issues.So my question is: is there a reason why that default value is 625000 ? #uart1 #stm8

Posted on January 02, 2017 at 09:12Hi,I'm stm8 newbie, and i wonder if i can do assumption, that reading uint32 variable will be atomic.There is simple function returning system time measured in ms using uint32_t variable, and it's looks like following 207                     ; 109 uint32_t systemGetBootTime(void) 207                     ; 110 { 208                     .text:    section    .text,new 209  0000               _systemGetBootTime: 211     &nbsp

Posted on January 11, 2017 at 09:42appearance：1.NRST PIN work on law electrical level，it has 200mV;2.UART1_CK work on high electrical level, so Max485 IC can't receive data;3.MCU has a continued fever,temperature:70°C;4.It's power supply work normal;STM8 MCU has four problem, but when reset its power, STM8 can work normal;We have been troubled by this problem，somebody can give me any Solution,many thanks!

Posted on June 17, 2011 at 15:53Hi, I am a project engineer. I use ST7,STM8 as microcontroller in my projects. And i use COSMIC as a complier. And i use STVD and STVP. I had not any problem while ? was using these programs under Win XP. But ? have a lot of problem related STVD and STVP( My O.S : Win7 Professional and Home Prem.) 1.    I loss menu bar when i open worksapce or when pass from normal mode to debug mode. And other sembols fail. And ? loss my worksapce...And similar problems. 2.    STVD is working  ver very very slowwww....Especially, at time pass from normal mode to debug mode... 3.    In debug mode, ? can not put breakpoint on valid line !!! I take a fail message! 4.    In debug mode; program counter drool.Therefore i can not follow my source code. Some valid lines a

Posted on December 09, 2013 at 17:21I have an application requiring the use of an STM32F107 to program a number of STM8S parts in-circuit, therefore I must implement the SWIM protocol on the STM32F107.  I have requested the source code for the SWIM driver in the STM32F103 part that is on the STM8 Value Line Discovery board, but ST has declined.Has anyone implemented the SWIM protocol on and STM32 part (or any embedded microcontroller)?  Would you be willing to share the source code?Thanks #swim-stm8

Posted on December 21, 2016 at 13:02I am trying to run a code in which timer causes an interrupt and everytime interrupt is generated, a variable h is incremented, but it remains zero in quickwatch window. My code is written below in stvd and cosmic compiler.#include 'stm8s.h'#include 'stm8s_tim1.h'#include 'stm8s_itc.h'#define TIM1_PSCRH (*(volatile uint8_t *)0x5260)#define TIM1_CR1    (*(volatile uint8_t *)0x5250)#define TIM1_ARRH    (*(volatile uint8_t *)0x5263)#define TIM1_ARRL    (*(volatile uint8_t *)0x5264)#define TIM1_PSCRL    (*(volatile uint8_t *)0x5261)#define TIM1_IER (*(volatile uint8_t *)0x5254)int h;void main(void){            //TIM1_SetCounter(5);enableInterrupts();GPIO_Config();            

Posted on March 21, 2016 at 10:40Hello! I compile sourse code stvp (http://www.st.com/web/en/catalog/tools/PF257522) in visual studio 2015. The program displays an error in console: >>> Programming PROGRAM MEMORY (API) ERROR : Cannot communicate with the tool. Wrong tool selection or check tool power supply or check that a previous session  is closed. <<< Programming PROGRAM MEMORY failsFull log: D:\workspace\ApiSample\Debug>APISample.exe -Device=STM8S103K3 -ProgMode=SWIM -Port=USM -FileProg=D:\ELload.hex STVP_CmdLine version 1.4 Verbose ON Log activity ON Display Progress OFF Message box warning if protect option byte ON Loop mode ON Erase device OFF Blank check device OFF Verify device ON Configuration: BoardName=ST-LINK Device=STM8S103K

Posted on January 05, 2017 at 11:54Today I've received email from ST with link to this https://community.st.com/s/feed/0D50X00009bLPmvSAG . So, why there no stm8 wish list? ST has forgot their low child, no any improvements anymore?Anyway, this is my list:Start supporting sdcc development. This is the only (working) opensource compiler for stm8. And when I say 'opensource' I mean 'no license limitation on use, code size, optimization or time expiration; works on linux, win and mac; anyone can participate in development (if wants)'. It's shame, that ST is ignoring chance to get reasonable C compiler in such low cost.Open st-link and st-linkv2 USB-to-SWIM communication protocol. This will help to improve opensource flashing tools (

Posted on December 22, 2016 at 08:25When I enable the ADC on my STM8A6266 MCU every PIN which is a ADC channel is blocked by the ADC? For example:PIN1-PIN8 are ADC channels 1-8, I enable the ADC and doing conversions on ADC channel 1 then I can't use PIN2 (ADC_channel 2) for EXTI interrupt? Tried it several times also with polling but it seems when the ADC is enabled it takes over the function of every PIN which is associated with the ADC. So even reading  input GPIO value isn't possible when ADC enabled.Couldn't find any comment regarding this in the datasheet or reference manual.

Posted on December 26, 2016 at 09:12Please do send us any hardware i2c codes like bit banging

Posted on September 16, 2010 at 23:33It's not even as if Hyperterminal is a standard part of Windows any more:http://windows.microsoft.com/en-US/windows-vista/What-happened-to-HyperTerminal

Posted on December 21, 2016 at 11:03Dear allI am using ADC in stm8s105c6. I use ADC1 for two channel for example AIN9 and AIN8.the problem is that when I switch the ADC1 from channel 9 to 8 the output result of the are being swapped.the input signal which is connected to the channel 9 gives the result of the input signal which is connected to channel 8 and vice versa.this the code that use.     ADC1->CSR &= 0x00;     ADC1->CSR |= 0x09;     TIM1_SetCompare1(sample_average(pch1));          ADC1->CSR &= 0x00;     ADC1->CSR |= 0x08;     TIM1_SetCompare2(sample_average(pch2));(but when I use just one channel everything is ok);Many Thanks for your help.

Posted on December 16, 2016 at 07:11In a timer code, I am facing number of 'missing prototype' errors in the included tim1.c file. Each of the error marks the line starting from 'assert param' ..... in tim1.c file. Do I have to change anything in conf.h file? Kindly help me.

Posted on December 07, 2016 at 16:09Is it possible to check the program size in STVD? So I can choose the correct Flash size of the MCU for my application...#stm8 #code-size #stvd #cosmic

Posted on November 30, 2016 at 20:46Hello,Has anyone had success using the Spirit1 library (provided as part of  http://www.st.com/en/embedded-software/stsw-connect009.html) in a project for an STM8 MCU using a free toolchain?The library was written in the C99 standard and uses features that are not supported by the SDCC or COSMIC compilers. The library is also >8kb, so the IAR compiler with the free license also throws an error.Appreciate any help,-David

Posted on December 06, 2016 at 13:59We are working on a project based on timer in which we keep facing an error : symbol _TIM1_SetCounter not defined. We have included the header files as well. Thanks in advance.

Posted on December 06, 2016 at 08:15Hello, Very interested, why needs code what marked bold? In the documentation, this bit is designated as insignificant.  163                     ; 28 __interrupt void _on_tick_(void) 163                     ; 29 { 164                            switch    .text 165  0034             __on_tick_: 167  0034 8a                push   &n

Posted on November 09, 2016 at 05:10After spending a little comparative analysis of the code generated by the compiler  SDCC for various 8-bit microcontrollers, I was surprised. Efficiency STM8 outside of competition. In my opinion this is the best among the 8 bit microcontrollers. And now I'm plan to use it in some of the technical solutions in the future. Excellent! #efficiency-code #efficiency-code-compiler-cosmic

Posted on November 29, 2016 at 21:19Hello, I briefly. How to implement critical section compatible with __monitor or __critical directives in other compilers? And how to pass the offset of stack of the local variables into inline assembler directives? And further. Who can explain it?... 112  ; 22     saved_cc = _asm (''push cc \n'' ''pop a \n''); 115  0006 8a               push   cc 116  0007 84               pop    a 118  0008 01               rrwa   x,a 119  0009 6b05             ld     (OFST+0,sp),a 121  ; 24   &nbsp

Posted on November 29, 2016 at 21:13There is a problem with the transfer on SPI how to track that this left?! Here is the function code for the transfer of bytes via SPI and a picture with a logic analyzer, circled in red, what confuses me is that for a glitch!void init_SPI(void){  CLK_PCKENR1 = 0x02; // Включаем тактирование SPI  PC_DDR|=(1<<6)|(1<<5)|(1<<4);//MOSI(6) SCLK(5) CS(4)  PC_CR1|=(1<<4);  PC_CR2|=(1<<4);  SPI_CR2|=(1<<1)|(1<<0);//CS Sofware  SPI_CR1|=(1<<5)|(1<<4)|(1<<3)|(1<<2); //Fmaster/256, режим Master  SPI_CR1&=~((1<<1)|(1<<0));  SPI_CR1|=(1<<6);// Включаем SPI}void spi_send_2(unsigned char dummy){  unsigned char tmp; SPI_DR=dummy; while (!SPI_SR_bit.TXE);}