STM8 MCUs

Posted on October 13, 2017 at 16:23how to write option byte in compile time.Like when i compiling my code,at that time of compiling, i have to write values in option byte or set read out protection.

Posted on October 24, 2017 at 21:08https://community.st.com/community/stm8-community/stm8-mcus 

Posted on October 21, 2017 at 19:08Hi to all,the ST-Link / V2 tool (so SWIM interface) is not compatible with the HALT instruction.Therefore, for debugging and / or using STMStudio, I'm forced not to use this functional mode.Is there any solution to elegantly circumvent the problem?#st-link/v2

Posted on October 13, 2017 at 09:25I downloaded the STM8CubeMX 1.2.0 update which also adds micro STM8S001J3 and STM8L001J3 to the library.Well, the STM8S001J3 Data Sheet exists but there is no one for the STM8L001J3. Why? Where can I find it?#stm8l001

Posted on September 02, 2017 at 06:10Hello.I want to using uart1 with STM8S103K,i do (already work):1. write program to display 4 pieces of 7 segment. 2. define STM8S103 in STM8S.hafter add stm8s_uart1.c and stm8s_uart1.h and build project, the compiler(Cosmic) tell error'stm8s_uart1.c bad struct/union operand' it's look like somethings not define to project.Help please.

Posted on October 26, 2016 at 08:18Hi guys,I use STM8S105K4 in our project. For power saving, it should enter in HALT mode, but IWDG will run out and reset the MCU. STM8S doesn't have the IWDG_HALT bit in OPTION bytes, anyone knows how to stop IWDG before enter HALT mode on STM8S??Thanks for any help!!!! #stm8s-halt-iwdg

Posted on October 21, 2017 at 16:58Hi all,I would like to realize the fading LED using timer2 of STM8S003K3. The requirement is not to use the default PWM output pin but the normal GPIO pin. So I want to use the update and compare interrupt functions of TIM2 to write High and Low of the normal GPIO pins. The idea is similar to the default PWM output but just manually change the output level of the GPIO in the interrupt function.My question is why I can only find 1 TIM2 capture/compare interrupt function mapping with IRQ no. 14 (IRQ no.15 and 16 are reserved). There are 3 TIM2 channels which means there must be 3 independt interrupt functions. May I use the reserved IRQ no. for the interrupt functions?Here is the handbook of STM8S0003K/F3:

Posted on October 13, 2017 at 12:58Hi,                When i using Ride 7 with stm8 compiler , i will do this following code for option bytes only in assembly. Its working.                But when i try with stvd with stm8 cosmic compiler,the following code is not working. How can i convert the following code for  stm8 cosmic compiler?cseg at 04800h db 000h ;LOCKBYTE   //Read out Bytes db 000h ;OPT1db 0FFh ;NOPT1 db 000h ;OPT2db 0FFh ;NOPT2  db 000h ;OPT3db 0FFh ;NOPT3 db 000h ;OPT4db 0FFh ;NOPT4 

Posted on October 16, 2017 at 20:09Hi again.I'm still stuck with the same problem as https://community.st.com/0D50X00009XkXJDSA3 before.The microcontroller model is STM8L101G3U.The debugger interface is ST-Link USB.I have a project with a custom bootloader, done as described in the app note https://my.st.com/content/my_st_com/en/products/embedded-software/mcus-embedded-software/stm8-embedded-software/stsw-stm8006.html, with Cosmic compiler (sorry to these who prefers other tools).Cannot figure out how to debug the main firmware and keep the bootloader programmed on the device.When the bootloader is programmed and p

Posted on October 16, 2017 at 14:03 Hello, iam trying to get a external interrupt an pin A3, but that does not work. On other pins it work, but on this pin it does not work. I will show you my code: Configuration: asm('SIM'); PA_ODR = 0; // All pins are turned off. PA_DDR_DDR3 = 0; // PA3 is input. PA_CR1_C13 = 1; // PA3 is pull high EXTI_CR1_PAIS = 2; // Interrupt on falling edge. EXTI_CR2_TLIS = 0; // Falling edge only. asm('RIM'); �?�?�?�?�?�?�? and Interrupt routine: // // Process the interrupt generated by the pressing of the button on PA3. // #pragma vector = EXTI0_vector __interrupt void EXTI_PORTA_IRQHandler(void) { PC_ODR_ODR3 = !PC_ODR_ODR3; } �?�?�?�?�?�?�?�? My debug point in the interrupt is never reached. And i absolutely dont know why. Do you have a hint for me? Thanks, Paul #pa3 #interrupt #external-interrupt

Posted on October 13, 2017 at 16:25How to write option byte in compile time?Like when i compile my code,at that time of compiling,i have to set Read out protection in compile time.

Posted on October 16, 2017 at 14:35In map file on of my driver files are not mapped correctly. It shows like below image.

Posted on October 16, 2017 at 11:07How to Set alternate function using option bytes in compile time?

Posted on October 06, 2017 at 18:02dear all, i'm ner in stm8 MCU. i use stvd to coding, and it was okey to compile. but when i try to build i got errorCompiling main.c...cxstm8 +mods0 +debug -pxp -no -l -i..\..\downloads\stm\stm8 -i..\..\downloads\stm\stm8\spl\en.stsw-stm8069\stm8s_stdperiph_lib\libraries\stm8s_stdperiph_driver\inc -i'C:\Program Files\COSMIC\CXSTM8_EVAL\Hstm8' -clDebug\ -coDebug\ main.cmain.c:Running Linkerclnk -m Debug\spl.map -l'C:\Program Files\COSMIC\CXSTM8_EVAL\Lib' -o Debug\spl.sm8 Debug\spl.lkf #error clnk Debug\spl.lkf:1 symbol _assert_param not defined (Debug\stm8s_gpio.o ) The command: 'clnk -m Debug\spl.map -l'C:\Program Files\COSMIC\CXSTM8_EVAL\Lib' -o Debug\spl.sm8 Debug\spl.lkf ' has failed, the returned value is: 1exit code=1.spl.elf - 3 error(s), 0 warning(s)does anyone can help? thanks......

Posted on October 13, 2017 at 22:28I am trying to write very tight loops in assembly. Looking at the programming guide, I see how many cycles each instruction should take. However, when I execute the code, the instructions take longer than I would expect. For example, both a nop and a cp should be one cycle. But if I replace a bunch of nops with cps, the timing changes. This seems strange to me. I cant tell exactly how far off they are, but slightly. I am running at 16MHz, and if I use bset/bres to set and clear a GPIO (also supposed to be one cycle) and verify it on a scope, it is clearly taking longer than one cycle. 

Posted on October 12, 2017 at 16:22How to create .hex file in stvd ?

Posted on October 13, 2017 at 08:00what are the configurations in stvd to use chex utility for creating hex file?

Posted on December 05, 2013 at 13:57Is there any tools to program multiple devices in parallel and where a DLL to interface the programmer with Labview is available?Something like the Gang Pro from TI.

Posted on October 06, 2017 at 20:05Hi

Posted on October 09, 2017 at 14:18 I’m trying to understand STM8 pipelining to be able to predict how much cycles my code will need. (I already https://stackoverflow.com/questions/46629607/understanding-stm8-pipelining, but I figured this focum is probably the better audience). I have this example, where I toggle a GPIO pin for 4 cycles each. Iffloopis aligned at 4byte-boundary + 3, the pin stays active for 5 cycles (i.e. one more than it should). I wonder why? // Switches port D2, 5 cycles high, 4 cycles low void main(void) {  __asm  bset 0x5011, #2 ; output mode  bset 0x5012, #2 ; push-pull  bset 0x5013, #2 ; fast switching  jra _loop  .bndry 4  nop  nop  nop  _loop:  nop  bset 0x500f, #2&n

Posted on September 06, 2016 at 21:02Hello, everyone! I have a problem with my eval board. I carried out all step as said user manual: 1) download a STVD and STVP form : http://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm8-software-development-tools/stm8-programmers/stvd-stm8.html 2) download Cosmic tools for the STM8 family from: http://www.cosmic-software.com/download.php&sharpstm8 3) download standard pheripheral Library form st site. 4) Create a workspace  as shown in this video:

Posted on October 02, 2017 at 14:52When code is copied to RAM (for example the code for rewriting internal flash)  how the RAM is allocated? Is it allocated statically or just uses any free space remaining below the stack? I cannot find this in the documentation.

Posted on October 04, 2017 at 09:14Hello,I used stm8cubeMX to generate a pinout for a stm8s003 (STM8S003F3 UFQFPN20).In cubemx I selected the outputs: PC7 is PWM output by TIM1_CH2 (pin14)PC3 is PWM output by TIM1_CH3 (pin10)PD4 is PWM output by TIM2_CH1 (pin18)PA3 is PWM output by TIM2_CH3 (pin7)According to the datasheet this is not possible: I have to set AFR0 to output TIM1_CH2 to PC7 (pin14). BUT: If I set AFR0, TIM2_CH1 will be output at PC5 (pin12) and NOT at PD4.Am I getting something wrong? Or is stm8cubeMX not caring about the option bits?RegardsTobias

Posted on October 02, 2017 at 00:08 I have a mother board of audio, video and gps with STM8S207K6 MCU that is working condition. When I try to read eeprom from the device, the message will appear 'Can not communicate with the device.Check the swim cable connection and check all the needed pin connection or the swim connecter If the application code uses swim desable and reset pin as out put or has desabled swim clock driver Try now to switch off and on the application power while nrst pin forced low' All pins are connected with same as mentioned . Pins of Swim, Nrst, VDD and GND. 

Posted on September 27, 2017 at 13:19Hello.I want to using uart1 with STM8S003,  after addstm8s_uart1.c and stm8s_uart1.h and build project, the compiler(Cosmic) tell error'stm8s_uart1.c bad struct/union operand' it's look like somethings not define to project.Help please.