STM8 MCUs

Posted on February 12, 2016 at 14:20Hello,I want to use I2C Communication between two stm8s208cb MCUs. I use stm8s standard peripharel library. My code:Master:&sharpinclude ''stm8s.h''&sharpdefine I2C_SPEED 300000&sharpdefine OWN_ADDRESS    0xA0      &sharpdefine SLAVE_ADDRESS    0x30void delay_delay(unsigned int mul);void main(){ CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1); I2C_DeInit(); I2C_Init(I2C_SPEED, 0xA0, I2C_DUTYCYCLE_2, I2C_ACK_CURR, I2C_ADDMODE_7BIT, 16);while (1){  I2C_GenerateSTART(ENABLE);I2C_Send7bitAddress(SLAVE_ADDRESS, I2C_DIRECTION_TX);I2C_SendData(0x61);I2C_GenerateSTOP(ENABLE);delay_delay(500);}}void delay_delay(unsigned int mul){   for(; mul>0; mul--)

Posted on February 04, 2016 at 08:31Hi,I would like to know which tools can be used like compiler, IDEs for developing firmware for STM8L micro controller.  #compilers #development-tools

Posted on February 05, 2016 at 14:24Hello,I want to use I2C communication between stm8s208cb(slave) and stm8s105c6t6(master). I use stm8s standard peripheral library.stm8s105c6t6(master) code:-in the void mainCLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1); //16MHz clockI2C_Init(400000, 0xA0, I2C_DUTYCYCLE_2, I2C_ACK_CURR, I2C_ADDMODE_7BIT, 16); //i2c initI2C_Cmd(ENABLE);I2C_GenerateSTART(ENABLE); //send start conditionI2C_Send7bitAddress(0x30, I2C_DIRECTION_TX); //send slave address for write/********************************************************************/-in the while(1)I2C_GenerateSTART(ENABLE);I2C_SendData(0x61);I2C_GenerateSTOP(ENABLE);stm8s208cb(slave) code:-in the void mainCLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1); //16MHz System ClockI2C_DeInit();I2C_Init(400000, 0x30, I2C_DUTYCYCLE_2, I2C_A

Posted on May 26, 2015 at 21:06Hey guys, I currently have an STM8S003F3 that is being powered by a battery. I want to be able to read the battery voltage, but am trying to reserve pins. I am trying to read the battery voltage off the Vdd pin and compare it to the internal voltage of the STM8S. I am having trouble finding the documentation that describes which internal ADC channels are connected to the Vdd pin, or how to set an ADC up to read the Vdd pin. Does anyone know where this documentation is or how this can be done? Thank you! Charles

Posted on January 29, 2016 at 14:13Hello Everyone,I am facing some issue with cosmic compiler version 4.4.2 for STM8. I have seen following run time problems.Push mechanism on stack fails during the function call when we select “Minimize code size (+compact)�? option for optimization from the drop-down list in STVD. We have seen a function having some argument and/or return value doesn’t return to the address from where It had called, instead it reaches any address of code area. However same function was working well when its been called two or so line before. And without optimization it works fine.After debugging we observed that there is some issue with stack push mechanism because when function called (during fail case), the data on stack memory for “function argument�? and “function return address�? was not in same sequence as when function succeed.  However all the time when su

Posted on March 28, 2014 at 14:51There now is a complete free toolchain for stm8 development (in particular we have an sdcc port for stm8 and we have stm8flash). I wrote a short tutorial on how to get started with stm8 development using free tools on the STM8/128-EVAL board. It can be found here:http://www.colecovision.eu/stm8/tutorial0.html Philipp P.S.: sdcc 3.4.0 is not released yet, but you can use sdcc 3.4.0 rc2. #gdb7 #stm8-sdcc-linux-minikit-2.0

Posted on January 25, 2016 at 05:30Hi all,I am using IAR for stm8, but I do not know how to check code size(flash, RAM...), could you tell me where I can check?Thanks very much

Posted on January 23, 2016 at 11:30Hello, I'm thinking about building a small device, like a badge or business card. I mainly want to display temperature on small alpha numeric display. Im looking for documentation about low powering in order to power my device with only cell battery. If you have ever done that before don't hesitate to share with me :)

Posted on December 30, 2015 at 12:48stm8flash, the AFAIK currently only free tool for using the ST-Link, ST-Link/v2 now has support for all STM8 parts. The support is currently in my fork at https://github.com/spth/stm8flash, but I guess Valentin will soon merge it upstream at https://github.com/vdudouyt/stm8flash stm8flash is an essential part of the free toolchain for STM8, since it allows writing programs onto STM8 microcontrollers via ST-Link and ST-Link/v2. There are some other free tools that work via a serial connection and the integrated bootloader instead, but not all STM8 have a bootloader. Philipp

Posted on September 11, 2015 at 18:53ST's documentation keeps mentioning the STM8S firmware libraries, but no document number is listed. I've been searching ST's site for some time, but no results returned. Maybe they've been renamed?Any info or suggestions are appreciated.

Posted on September 09, 2014 at 15:19Dear sir,    I am starting to study STM8S and build a simple code. But after complier, it show '' &sharperror cpstm8 stm8s103.h:600(0+6) missing ; main.c:  The command: ''cxstm8 +debug -pxp -no -l +mods0 -pp -i''C:\Program Files (x86)\COSMIC\CXSTM8_32K\Hstm8''  -clDebug\ -coDebug\ main.c'' has failed, the returned value is: 1 exit code=1.test.elf - 3 error(s), 0 warning(s)''     Is anyone know what's the problem and how to solve? Thanks. Chris   #compiler-messages #c-learning

Posted on December 25, 2015 at 21:38I want to use the UART on the STM8A-DISCOVERY boards. However, AFAIK, the STM8A RX and TX pins are not connected to any header on the boards. There are open solder bridges connecting them to the ST-Link/v2 interface. I could just solder some wires to the STM8 side of these open solder bridges to get the RX/TX signals. Any better ideas? Philipp

Posted on January 07, 2016 at 16:04Hello:I'm write code from STM8S105C4T6 using tim4 basic timer, the code is store  in INTERRUPT_HANDLER routine, anythings work.I'm change to use  STM8S103K3T6C (smallest) , the interrupt routine don't fire,I change from tim4 to tim1, everythings work.I'm alway read the datasheet of STM8S103, it's also had tim1, tim2 and tim4Why can't use it, anyone can explain this ? #stm8s

Posted on March 13, 2013 at 09:32This is referenced in various documents regarding the stm8l-discovery, but I cannot for the life of me find it for download anywhere.

Posted on January 07, 2016 at 14:46The original post was too long to process during our migration. Please click on the attachment to read the original post.

Posted on January 07, 2016 at 07:27Hello,We are trying to flash STM8L052C6T6 MCU board with STM8L_discovery board.Everything was working OK. Suddenly STVD tool is closed and after that we are unable to flash the code in debug/release mode. Getting error as mentioned in subject.Kindly suggest your inputs for the same.Regards,Anjali #stm8l #stm8

Posted on January 07, 2016 at 07:23Hello,We are trying to flash STM8L052C6T6 MCU board with STM8L_discovery board.Everything was working OK. Suddenly STVD tool is closed and after that we are unable to flash the code in debug/release mode. Getting error as mentioned in subject.Kindly suggest your inputs for the same.Regards,Anjali

Posted on December 30, 2014 at 03:12Would someone assist with the logic of my 4 stage if-statement.  It basically performs one of four groups depending upon how 2 dip switches are set.  The problem is that no matter how I set the 2 dip switches it always goes to line 868 (see attachment).  I can never get it to go to line 859, 862, or 865, no matter how I set the external dip switches.  I have monitored the dip switches and they are functioning properly as a 3.3V or 0V logic level, depending upon dip position.  Dip 1 interfaces to PA2, and dip 2 interfaces to PC5.Maybe I don't have my parenthesis set correct, or maybe my center & needs to be &&?  Perhaps my ! is not the correct operand?  I even tried a different approach as per line 839-855, but that didn't work AT ALL, i.e., after setting breakpoints at 841,845,850,or 854, it never stopped.

Posted on December 23, 2015 at 04:42Hi all Cosmic compiler:   Parser V4.11.4 - 12 Aug 2015,   Generator (Limited) V4.4.3 - 13 Oct 2015   Optimizer V4.4.3 - 13 Oct 2015 Consider the attached test code - testbug.c line 17 isCW = !isCW ; // generates incorrect code using cpl instruction, with or with optimization The compiler does not differentiate logical not '!' construct and complement '~' construct, and treats them the same here. when isCW is true = 0x01, !isCW using cpl instruction causes isCW becomes 0xfe. subsequent test on isCW at line 18 always result in true and causes line 19 always execute. The correct code generation should use bcpl instruction instead. The temporary fix can be: 1. use static or global variable for isCW 2. use the construct isCW ^= 1 ;  // knowing that it is

Posted on December 25, 2015 at 22:00There are now tutorials for 4 of the STM8 Discovery boards athttp://www.colecovision.eu/stm8/ The tutorials use the free C compiler SDCC and stm8flash. For the STM8S-DISCOVERY, STM8L-DISCOVERY and STM8A-DISCOVERY they show how to use the timers and the LEDs. For the STM8S-DISCOVERY and STM8L-DISCOVERY there are also tutorials that show how to use the UART for serial communication. Philipp P.S.: The STM8A-DISCOVERY tutorials don't have images yet, I'll take those when I find free time during suitable lighting conditions.

Posted on December 24, 2015 at 17:05Recently, tutorials for many STM8S boards have been added athttp://www.colecovision.eu/stm8/ The previously existing tutorials there have been updated. The tutorials for 9 STM8S (and 1 STM8L) development boards show how to use Timer, GPIO, UART. They use the free C compiler SDCC and stm8flash. For the boards that have an STM8S with enough RAM, there are also tutorials for getting the Dhrystone and Whetstone benchmarks running on them. Philipp P.S.: I intend to add tutorials for STM8A and STM8L later.

Posted on December 23, 2015 at 10:19I am using STM8L051F3.I want to use Timer-2 ch-1 & ch-2 and Timer-3 ch-1 in sequence PWM mode.All 3 timer in PWM mode with Period of 6 ms.But first i want to start Timer-2 ch-1 PWM. After Complition of its 1st pulse Timer-2 ch-2 PWM pulse should start. and after completion of this pulse Timer-3 ch-1 pulse should start. and after complition of this timer-2 ch-1 pulse should start.Timer-2 ch-1 --> Timer-2 ch-2 --> Timer-3 ch-1 --> Timer-2 ch-1 --> ....So how should i initialize both timer using driver library APIs?  #stm8-timer #stm8

Posted on December 05, 2015 at 18:13Hi, I the first time write at this forum, prompt to me please, I have the STM8S207S8T6C microcontroller, and I have a programmator of ST-LINK/V2 and the ST Visual Programmer program, on mine the microcontroller isn't present are sewn up I it I can to read quietly, but I can't erase it, this function isn't available to the STVP program, I apply a photo how I can erase the microcontroller? I will be glad to any council, Thanks.

Posted on May 16, 2014 at 16:19Hi everyone I am using STM8S003F3 in my board. for reading 5 analog inputs in regular interval I have used single conversion - scan mode - buffered ADC triggered by TIM1 by the following code //ADC1_DeInit (); ADC1_Init ( ADC1_CONVERSIONMODE_SINGLE, ADC1_CHANNEL_6,   ADC1_PRESSEL_FCPU_D18,              ADC1_EXTTRIG_TIM , ENABLE,  ADC1_ALIGN_RIGHT, ADC1_SCHMITTTRIG_ALL, DISABLE ); ADC1->CR2 |= ADC1_CR2_SCAN;//ADC1_ScanModeCmd ( ENABLE ); ADC1->CSR |= (uint8_t)ADC1_IT_EOCIE;//ADC1_ITConfig ( ADC1_IT_EOCIE, ENABLE ); ADC1->CR3 |= ADC1_CR3_DBUF;//ADC1_DataBufferCmd ( ENABLE ); ADC1->CR1 |= ADC1_CR1_ADON;//ADC1_Cmd ( ENABLE ); and I configured TIM1 to trigger ADC1 in regular times with the following code //TIM1_DeInit (); TIM1_

Posted on December 17, 2015 at 20:10Is there any way to execute a ''pre-build command'' in STVD? I would like to auto-increment a version number in the source-code prior to each build. I have a command-line utility that modifies a header file to do this, but I see no way to make it run at the start of the build process. Any ideas? #stvd