STM8 MCUs

Posted on December 16, 2015 at 15:44Hi,i have generated hex file for a particular project. The controller used is stm8s003f3. My question is regarding checksum. I'm not familiar with checksum. How can i add checksum to this hex file.? How can i determine the type checksum and its value? Please let me know in detail about checksum. I'm using STVD and STVP for development purpose. Any help would be appreciated...... #stm8 #checksum

Posted on December 16, 2015 at 20:38Hi all,I am working on sensing of my AC waveform (of 50 Hz) with ADC1 of STM8S003k3 MCU. There are three ways to trigger my ADC.1) Through software means(internally)2) TIM1 TRGO event3) External Trigger ADC_ETR (PD.3) pin Firstly i have sampled my waveform through software means but i am getting sharp points at AC peaks.So i think to change sampling frequency using Timer TRGO event.The TRGO signal is my OC1REF signal.When i observed my Timer Ouput(TRGO) on PC.1 pin,i am getting correct sampling freq set by me(10 Khz).But on sampling the output through timer Interrupt,i am not getting any change in my waveform shape.Please help me or provide me code snippet of TIM1 generating TRGO event to trigger ADC SOC.RegardsDeepak #trgo #adc-timer-debug #stm8s003

Posted on December 14, 2015 at 12:44Hi all,I downloaded the library stm8s_dali_lib and tried to build the project using the ST Visual Develop v4.3.8I got error: ''Error creating proces for executable cxstm8''Has anyone had the same issue?Best regards,Stan Catala,

Posted on December 08, 2015 at 20:26Hi guys,I am trying to access STM8L Discovery board bootloader, to upload some code..The problem is...where can I connect my usb/rs232 converter??The pins for usart1 are connected to LCD display..Does any one knows how to enter bootloader mode in stm8l152c6 that come with discovery board?thanks in advance.regards

Posted on November 19, 2015 at 23:22I'm working on some code to set the RTC alarm, and I've gone through all the resources I can find on how to set this up correctly, but it's just not working. If you could take a look and see if I've missed anything, or something is in the wrong order, I would really appreciate it. I've just hard coded some dummy values for simplicity. &sharpdefine USE_HSI RTC_TimeTypeDef current_time_base; // a typedef struct RTC_DateTypeDef current_date_base; // a typedef struct RTC_AlarmTypeDef alarm_time_base; // a typedef struct RTC_Format_TypeDef time_format = RTC_Format_BCD; // a typedef enum RTC_InitTypeDef initialization_constants_base; // a typedef struct void main(void) {     RTC_DeInit();     enableInterru

Posted on December 09, 2015 at 10:21Hello,on STM8S003F3U according to datasheet there is 1024(total ram) - 513(stack) = 510 bytes for user application: 256 byte in the zero page and (510-256)= 254 in Ram section.If use the short stack compilation option all data are automaticaly maped in the zero page space and i have an error if i use more than 256 bytes.if i use the long stack compilation data are mapped automaticaly in the upper page: the Ram page and i have an error if use more than 254 (normal because there is the end stack overlap)I did'nt find any cosmic compiler user guide for stm8. If i try to use pragma to force linker to set data in different space the error is : pragma misplaced ...How is it possible to use mixed data  mapping zero page and ram page ???thank's a lotregarsjohan

Posted on December 05, 2015 at 10:29Hi, I'm using STM8S003F3 controller to monitor a temperature sensor using I2C Interface. I'm able to monitor while in debug and Run mode (in STVD IDE) using SWIM, but once I program into flash (using STVP through SWIM) im not getting clock and data in I2C lines. Is there any setting that has to be taken care of while programming through STVP. Any help would be appreciated.Thanks.Attached is the I2C code. Is there any more configuration that has to be done ? void init(void){ i2c_deinit(); // Initialize I2C interface  i2c_init();}void i2c_deinit(void){ /* Disable I2C peripheral */ I2C_Cmd(DISABLE); /* Deinit I2C module */ I2C_DeInit(); /* Disable I2C module clock */ CLK_PeripheralClockConfig(CLK_PERIPHERAL_

Posted on December 03, 2015 at 12:29I m beginer to tis stm8s i m using stm8s003 series with cosmic compiler to develop a product i need a sample of tm1638 interfacing with spi can any one help me please .. thanx in advance ..  #stm8s

Posted on December 03, 2015 at 10:14I bought the starter kit STEVAL-ISB027V1, EWSTM8-2015 I downloaded and installed it but I can not find the source of the firmware.Where are? Thanks.

Posted on November 30, 2015 at 10:22Hi, I am implementing SWIM Protocol for an own programmer. It already works quite well with STM8S003 but I am facing difficulties with STM8L101. I wonder why the 128 HSI-timing-pulse on SWIM entry from the STM8L is ~85us long (I would expect 64us). I wonder if this is because the HSIT bit in SWIM_CSR is not set during reset and the hsi is not calibrated before OPT loading. Does the STM8L trim the HSI after reset-release (which includes OPT-loading) and therefore change the SWIM-clock speed? So do I need to recalibrate my SWIM timing after stm8 option bytes have been loaded by cpu after reset-release? My STM8S005 show similar behaviour. The STM8S003 I have tested are older production and STM8L und STM8S005 are ''fresh''. I did not check the issue on new STM8S003 yet - maybe it is similar..? Thanks & best regards, Alex #swim

Posted on November 25, 2015 at 15:14Hello everybody,  I'm working on the STM8 discovery board to implement some application which controls the STM8's GPIOs from an SPI master. The code relies on SPI interrupts. I would like the master sends the address of the targeted register (15 bits) and a 16th one (MSB) which indicates the access mode (Read or Write). I can't solve an issue about pointers. The interrupt code is the following : &sharpdefine ACCESS_BIT 7 &sharpdefine READ_INPUT_ID 0x50 char cpt, temp, add; uint8_t mode_add_MSB, add_LSB; bool access; // '1' = W, '0' = R INTERRUPT_HANDLER(SPI_IRQHandler, 10) {         if (SPI_GetITStatus(SPI_IT_RXNE)!=RESET)     {         if(cpt==0) // Reception of the access mode bit and the 7 MSB address bits  &nb

Posted on January 29, 2015 at 08:58Let the stm8s003k3 i2c slave,Works fine, butWhen the master send general call address(0x00), stm8s003k3 stops,Of course, I2C_GeneralCallCmd(TRUE) is called.and the EVENTI2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHEDis occured when master send general call.Is there any example code for i2c general call ??Thanks.

Posted on November 20, 2015 at 10:00Hi!I have to generate a PWM that must  be quite closely synced to an external signal of 50 Hz (to avoid any drifts).From the documentation contents of STM8S008F/K of it using the TIM1 external trigger (ETR) to reset the PWM/Timer counter (and relying on the commutation event to implement some stepwise updates of the PWM) would be the optimal way to go.Alas, as of my understanding, the STM8S003F microchip does not have a TIM1 external trigger pin (TIM1_ETR) that can be selected as trigger source.The alternative would be to rely on high priority interrupts. I would like to avoid this to interfere as little as possible on the other software components (essential decoding of a signal), although at 50Hz that might be negligible - not tested yet.So my question ultimately being: Did I miss something and there effectively is an pin-

Posted on November 18, 2015 at 12:34Thank you Luca,   As per your reply we already change the workspace toolset Rootpath as follows:      ''C:\Program Files\COSMIC\32K_Compilers\CXSTM8''but I can't understand the meaning of- your linker file specifies a maximum file for the code (.text segment) of 8kso please explain above in detail.Thanks

Posted on December 17, 2013 at 14:31Hello everyone. I am making Kitchen Clock on STM8S105C6 and STM8 touch sence library. I need 4 buttons and  i have configurate them as SCKEY. Now they works fine. My problem is that library catch only one button at once, i mean if you touch 2 buttons at same time library  gaves only one Detect flag for first of two buttons. But i need to enter in Time adjustment menu by pressing two buttons at once.     Can you give mi a suggest please. #touch #stm8-tsl #stm8s-and-tsl #double

Posted on October 13, 2015 at 16:41When I go to compile the sample code from ST's site, I get the error ''Can't Access File: .Idea_Temp\IDEABLD.BAT in Project directory. Check access rights .....'' I tried searching for IDEABLD.BAT, and I can't find it anywhere on my computer. I've already tried reinstalling the COSMIC compiler, and still get this error. Any suggestions? #cosmic-compiler-stm8l-ideabld

Posted on September 06, 2012 at 09:37Hi, I am debugging software for an STM8S105x6, using the programmer from the STM8S-Discovery board and STVD software. All went fine, until suddenly an error popped up while entering debug mode: '** Connection error (usb://usb): swim error [30006]: comm init error: chip does not answer'. Also STVP cannot connect to the MCU. I've tried to other boards (that have worked before). I've directly soldered the SWIM wires to the board. Without any result. When i changed the programmer a first time, the problem remained. But with a third programmer, the problem was solved. But after a while the problem came back. This programmer still seems to be ok, because i can program the MCU on the demoboard itself. I have no clue what can be the problem. Some more info about the board:  * GND, re

Posted on November 10, 2015 at 14:56 Hi All, I am during writing bootloader for STLUX processor (base on STM8). Both, bootloader and main program uses own interrupt vector table. The STM8 processor has fixed interrupt vector table at 0x8000 address. I want to redirect from fixed vector table to vector table storing in RAM. I wrote the code to copy vector table from bootloader or main program to RAM and it is work fine, but I have problem with redirection. I do not know how can I do this. I use an IAR. I did an initialization a fixed vector table like this: typedef void (__far_func * interrupt_handler_t)( void ); struct interrupt_vector { unsigned char interrupt_instruction; interrupt_handler_t interrupt_handler; }; struct interrupt_vector RamISR_IRQ[32] @ 0x00100; struct interrupt_vector const _vectab[] @ 0x8000 = { {0x82, (interrupt_handler_t)(RamISR_IRQ)}, /* reset */ {0x82, (interrupt_handler_t)(RamISR_IRQ+ 1)}, /* trap */ {0

Posted on November 03, 2015 at 03:05Dear All,When STM8 power on or after reset, how about value of RAM  (0x00 or 0xff or another value).I try to search on the internet about RAM structure of STM8 but don't have any documentThanks.

Posted on October 29, 2015 at 10:00 I am new to STM I have written following code in iar but couldn't able to receive from uart. // // This program shows how you can output a message on the UART on // the STM8S microcontroller. // // This software is provided under the CC BY-SA 3.0 licence. A // copy of this licence can be found at: // // http://creativecommons.org/licenses/by-sa/3.0/legalcode // #if defined DISCOVERY #include <iostm8S105c6.h> #elif defined PROTOMODULE #include <iostm8s103k3.h> #else #include <iostm8s003f3.h> #endif #include <intrinsics.h> #include <stdio.h> // // Setup the system clock to run at 16MHz using the internal oscillator. // void InitialiseSystemClock() { CLK_ICKR = 0; // Reset the Internal Clock Register. CLK_ICKR_HSIEN = 1; // Enable the HSI. CLK_ECKR = 0; // Disa

Posted on November 01, 2015 at 16:00Hello everyone, I am using STM8S105 and STM8S003. Can we create delay 1 microsecond with TIMER4? I can create delay 1ms, 100us, 10us but can not for delay 1us. Can we? Thank you!

Posted on October 29, 2015 at 10:08I am working on STM8S3F3P , when i tried to standard peripheral for this microcontroller i keep getting error that select predetermined chip from STM/A.Is there any tutorial to learn this..

Posted on October 15, 2015 at 15:12Hello All, Is there any way to run STM8L101 at a frequency about 200 kHz to save some microAmps?BR, Dmitry #frequency #stm8l101

Posted on October 19, 2015 at 21:45Hello, We are planning to start to use STM8 automotive microcontroller in one of our product. To start with we downloaded STVD development suite (C:\Program Files (x86)\STMicroelectronics\st_toolset) and Cosmic (C:\Program Files (x86)\COSMIC\32K_Compilers\CXSTM8) compiler to use as C compiler.While configuring, COSMIC compiler on STVD\tools\options\ as default toolset getting attached error message. Please let us know, what steps I am missing. Thanks,

Posted on October 19, 2015 at 21:40Hello, We are planning to start to use STM8 automotive microcontroller in one of our product. To start with we downloaded STVD development suite (C:\Program Files (x86)\STMicroelectronics\st_toolset) and Cosmic (C:\Program Files (x86)\COSMIC\32K_Compilers\CXSTM8) compiler to use as C compiler.While configuring, COSMIC compiler on STVD\tools\options\ as default toolset getting attached error message. Please let us know, what steps I am missing. Thanks, #stvd---cosmic-configuration