STM8 MCUs

Posted on October 26, 2014 at 18:41I wrote a few tutorials for getting started with sdcc and the STM8/128-EVAL. One shows how to set up I/O and a timer. It uses the 4 red LEDs as a 4-bit counter than increments exactly once per second: http://www.colecovision.eu/stm8/128-EVAL%20LED.shtml One shows how to set up the UART, and use it for standard I/O: It writes ''Hello World!'' using printf(): http://www.colecovision.eu/stm8/128-EVAL%20Serial.shtml With the accurate timer and serial I/O, we can run some benchmarks, such as Dhrystone and Whetstone and have the results reported on a terminal attached via a nullmodem cable:

Posted on October 26, 2014 at 15:40I work on ST-Microcontroller  :STM8S003F3U6.I try to use TIM1 as a trigger (TRGO) for ADC interrupt.When I use the single pulse (TIM1_CR1_OPM=1)   mode (on TIM1 counter overflow) everything seems to work well, but when I change TIM1_CR1_OPM to ''0'' for counter's continuous work, the ADC interrupt stops working.TIM1 no longer launch ADC at the TIM1-counter overflow.I need TIM1-counter work continuously and start ADC at every TIM1-counter overflow. I don’t understand what am I doing wrong?the relevant parts of my code://*******ADC + TIM1**  init  ******************************/ //********************************************************/    ADC_CSR_EOC=0;   ADC_CR1_ADON=0;    &nbsp

Posted on October 24, 2014 at 12:07Just FYI...    The new release of the Raisonance STM8, ST7 Compiler (v 2.58.15.0267) went on line. This is a maintenance release and corrects issues encountered in the latest anti-regression and performance testing. It can be downloaded here: http://support-raisonance.com/extranet/tools/index.php?param=tool__id__11http://support.raisonance.com/content/rkit-stm8 There is also information about latest http://www.raisonance.com/stm8-benchmark.html Note that

Posted on October 21, 2014 at 11:25Hi, I have problem with gpio interrupt. I am trying configure and enable interrupt by calling function GPIO_Init(GPIO0, GPIO_PIN_0, GPIO_MODE_IN_FL_IT) but without success. In interrupt handler function INTERRUPT_HANDLER(PORT2_IRQHandler,5) I am calling GPIO_WriteReverse(GPIO0, GPIO_PIN_2) and it is not working. When I put GPIO_WriteReverse(GPIO0, GPIO_PIN_2) in main loop, it works and PIN_2 is toggled. So I configured PIN_2 correctly. In STM8 I found EXTI_SetExtIntSensitivity(...) function. It has not representation in stlux library. Do you have any idea why INTERRUPT_HANDLER(PORT2_IRQHandler,5) not occur? How I must to do the correct configuration?

Posted on October 12, 2014 at 21:18The original post was too long to process during our migration. Please click on the attachment to read the original post.

Posted on October 04, 2014 at 12:31I'm using STM8L151G6 in a device. I've erased program and data memory using STVP and set bootloader checks 1 and 2 in option bytes (although as i understand this is not necessary since there is no data at address 0x8000 bootloader should start right away). So I'm sending synchronisation byte (0x7F) via UART to the device to start code upload, but I'm getting no response. See the pic, channel 1 is device's RX, channel 2 is it's TX. I've tried resetting the MCU by pulling down the RST pin, that didn't help. What could be causing the problem? #stm8 #bootloader

Posted on September 26, 2014 at 16:37HelloWith the code below, i get returned an incremented caracter it self , the pointer is not,is it normal ? meaning my code is wrong . i mean i get U not O ...Or should I file a bug at sdcc comunity? ldw X,&sharpstring_0 ldw _charptr, Xmain_loop: LDW X, &sharp0d50 CALL delay_m CALL ledon LDW X, &sharp0d50 CALL delay_m CALL ledoff ldw Y,[_charptr]                 ; <---- not returning what is at that address ldw _lcdchar, Y call _lcdwritechar ldw Y, _charptr incw Y ldw _charptr, Y JP main_loop .area CODEstring_0:        .ascii ''toto''      &nb

Posted on September 04, 2014 at 14:58Hello, Ich have a question. I am connecting the output pin (PC7) of STM8S003K3 to input pin (PC7) of STM8S207S. When I set the pin to high, I do not see the input pin PC7 (as interrupt input) of STM8S207S goes to high. The following is my pin configuration: PC7 on STM8S003K3: PC_ODR = 0x00;  PC_CR1 = 0xFE;  //pc7 as push pull PC_CR2 = 0x00;  //pc7 speed up to 10MHz PC_DDR = 0x9E; //pc7 as output PC7 on STM8S207SB: PC_ODR = 0x00;  PC_CR1 = 0xEE;  //PC7 is pull up PC_DDR = 0x6E;  //PC7 is input If I measured the PC7 pin of STM8S003K3 directly without it connected to the PC7 of STM8S207S, it works. I see this pin goes high and low. The register output also shows that it is doing what I want. Anybody can help me on this? Sincerely yours, HL #gpio-not-goi

Posted on September 23, 2014 at 17:41I'm not even sure what to ask so I'll explain the problem as best I can. I did search everywhere for an answer. Anyway, I have an embedded project with a STM8S208C8 micro. I developed the project in C using ST Visual Develop Version 4.3.5. Down load and debug is via ST-LINK/V2 which I have been doing for a very long time on multiple projects so I do not think this is a trivial problem. The project basically receives GPS serial messages via the UART then translates the data into NMEA 2000 formatted messages and sends out the CAN bus. This is very similar to many many projects I have done over the years. Nothing special to me. Now the problem is that at random times (minutes to hours) the program will fly off to never never land. At that point, interrupts still come in but the program execution is way out somewhere. This looks like your standard everyday pointer corruption or stack overflow problem but I have been unsuc

Posted on September 19, 2014 at 09:57hello please may i ask if there is a program availabe in assembly language for calculating the crc ccitt  with x16+x12+c5+1 many thanks marc debruyne #crc

Posted on September 13, 2014 at 08:33I'm trying to get a string from usart to stm8l, but when i got 2byte char, the RXNE is clear, and i can't get anymore char.My code is:main{    int8_t count = 0;    getdata  = '''';    while(1)    {        getdata[count++] = getchar();                if(getdata[0]==0x0D&&getdata[1]==0x0A)        {          getdata[0]=getdata[1]=NULL; count=0;        }        if(getdata[count-1]==0x0A)        {          getdata[count-1]=NULL;          getdata[count]=NULL;  break; }    }

Posted on September 01, 2014 at 20:38please delete this item #cosmic-stm8-cosmic-lkf

Posted on August 29, 2014 at 16:00Hello there, I am playing with my STM8s Discovery board but unable to set the clock properly. Can someone please put some light on what I am doing wrong. My code is as follows:---------------------------------------------&sharpinclude ''stm8s.h''u16 c=9000;main(){ void CLK_Deinit(); void CLK_HSICmd(ENABLE); void CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV8); void CLK_SYSCLKConfig(CLK_PRESCALER_CPUDIV128); CLK_ClockSwitchConfig(CLK_SWITCHMODE_AUTO,CLK_SOURCE_HSI,ENABLE,CLK_CURRENTCLOCKSTATE_DISABLE); GPIO_DeInit (GPIOD); GPIO_Init (GPIOD,GPIO_PIN_0,GPIO_MODE_OUT_PP_LOW_FAST);// TIM2_DeInit();// TIM2_TimeBaseInit(TIM2_PRESCALER_2048, 300);// TIM2_Cmd(ENABLE); while (1){/* if (TIM2_GetCounter()>150){ GPIO_WriteHigh(GPIOD,GPIO_PIN_0); } else { GPIO

Posted on August 28, 2014 at 11:44Hi Iam new to STM8S,Help me 1) STM8S value line discovery board Connected to the PC 2) EW STM8S Installed 3) compile the sample code -The out put of compile code is not in Hex file.    it is on .outfile. HOW TO CHANGE THE .OUT FILE TO HEX File or what are the things i have to do for the HEX OUT PUT. 

Posted on August 21, 2014 at 21:18Hello,I am working on an application which requires the use of the ADC1 peripheral as well as the COMP1 & COMP2 peripherals. There does not appear to be anything in the datasheet against this, but there is a note in the comparator driver:''COMP1 comparator and ADC can't be used at the same time since they share the same ADC switch matrix (analog switches).''  -stm8l15x_comp.cIs this a limitation of the driver, or of the chip? If it is a chip limitation, could someone please point me in the direction of the datasheet that mentions it? If it is a driver limitation, does anyone know if there is there a work-around?Thanks!Gabrielle

Posted on August 08, 2014 at 13:36I'm trying to program an stm8s105 using  icp method through the swim interface and using an STM32F4 discovery board as host and a firmware written by me. I can enable the swim interface of the stm8s and i can read and write eeprom memory and registers, i can also read flash program memory but i can not enable write access to this memory in fact the PUL bit in the FLASH_IAPSR register is always set to 0 even after a successfull writing of FLASH_PUKR register. Has anyone encountered similar issues? Any advice or useful information is very welcome

Posted on September 02, 2013 at 12:58Regretably I have to use win8 on my work machine, and have come across to two issues with STVD running on this OS. 1. Every time I open a project I get the following error:Access to C:\Program Files (x86)\STMicroelectronics\st_toolset\stvd\default.web was deniedI just close this error and continue.2. Then next error that pops up after I close the above error message is as follows;�Failed to load Project (file location).stp, File not found on disk. Please remove from workspace.�I click OK, then depending on the file name length STVD crashes or continues, if it crashes and I then have to kill the process so that I am able to open STVD again and I need to perform the workaround.I have found a workaround for this error, but it involves me copyi

Posted on July 11, 2014 at 03:13I use STM8S105C6 to read DS1302;I have try the ways in the datasheet to read the DS1302's data, but it  was fail;STM8S105C6  need  ACK signal ,but DS1302 can't output ACK signal ;How can I do it;Thanks for your reply #ds1302 #stm8s-i2c-ds1302

Posted on August 01, 2014 at 12:09I'm using STVD+cosmic compiler and STM8s-discovery board, i test a little bit and go away for a long time.After i change the new computer and install STVD, cosmic,plug the USB cable to board , the board running fine.I open project ''PWM'' from example, compile with out error, can debug but the 'run' menu is diabled, what's wrong ?

Posted on July 04, 2014 at 14:17I have to get started for STM8S003F3. I have made a custom board.1. What debugger to choose?2. What IDE, freeware preferably for c language3. Any example code to get started

Posted on February 23, 2014 at 21:47Hi, I am developing a standalone programming board for stm8 devices with SWIM interface. Development is quite far but I am still facing some questions I see nowhere answered: 1: in Flash Programming Manual it says there is a ''DeviceID'' that can/should be read. Can someone give me more information how/where to read that ID and which ID represents which device? 2: How to clean detect that a device has active readout protection set? The SWIM_CSR NO_ACCESS bit seems to be always 0 to me (using STM8S003 device). When I try to read memory of a protected device it always reads 0x71 and writing to memory fails with the data-bytes not being ACKed be the target. Are these the only indications for an active ROP or is there a clean way to detect the ROP? Thank you! Best regards, Alex #swim-interface-stm8-rop-deviceid

Posted on July 27, 2014 at 19:47I’m developing a programmer driver that runs through the SWIM.I now have all of my SWIM macros working, and I’m ready to move on.I am currently working with an STM8S207 device. Where is the Chip ID register? I’ve combed the datasheets and come up with nothing. I can read the lot code. I can even get the X/Y of the wafer that it came from. But what register tells me this is an STM8S207CB? Is it in boot ROM someplace? I suppose I could read and compare the entire boot ROM each time I connect to the part. But that seems a little ridiculous.What I really need is a chart of all the STM8 ID codes, and at what address I can find them.It’s funny how you pay attention to the finest details, but the most basic stuff gets overlooked.Dudley

Posted on May 01, 2014 at 09:32Hi Guys: May I ask how to distinguish the two sets of UART1 in STM8L151 ? There are UART1_TX = Port A2 UART1_Rx = Port A3 or UART1_TX = Port C3 UART1_Rx = Port C2 I confused about how the STM8L know I am using which set of them? Thx. #s

Posted on July 17, 2013 at 14:30Hello, I am using STM8S105 as an I2C slave. A strange thing happens when I disable I2C_StretchClockCmd(DISBALE). When the master asks for data, the first byte is always its slave address, followed by the TX buffer. When I enable clock stretching, then the data is written correctly (without Slave address) #clock-stretch-i2c #i2c

Posted on December 15, 2009 at 12:44Is STM8S103F3 TIM4 auto-reload up-counter ?