STM8 MCUs

Posted on April 28, 2014 at 17:10Hello, I have installed STVD 4.3.5 with Cosmic STM8 32K Special Edition Free license. I have a problem using feature: Go to Definition Of ''something''. When I try to click this on some function or variable error message for a few files appears: '' ctags: Warning: cannot open source file ''somefile'' : No such file or directory '' All these files are corectly included into project, compiling and linking pass ok. But from some reason all these files and only them will appear in External Dependencies project folder. And when I click on these files and choose properties I can see path to root folder, but they are in different subdirectories of project folder. I don't know why these files and only these files are generated in External Dependencies everytime after Compilation and Linking. Is there something I'm missing in project options or something else?

Posted on April 19, 2014 at 06:47i am trying to measure 220 volt using the resistor divider network. with respect to the measured input voltages i am switching AC load from relay but the problem is that after random number of switching the micro-controller is reset. please help any suggestion what i am doing wrong or any alternative approach .also there is no watchdog timer enabled  #reset-stm8

Posted on August 02, 2013 at 10:48I've got an STM8L Discovery board, but I've decided to use the STM8L101 chip. Is this chip a subset of the STM8L152C6T6 used on the didcovery board? Does the swim use the same IO port/pins on both chips? Or do I need to spend another �100 on an STM8L 101 EVAL board???I'm trying to set up a new project so I'm trying to get my head round tons of stuff. I'm also an old bloke who just wants to get going rather than be circle jerked round enless web pages!Del(grumpy mode off) #stm*l101

Posted on April 16, 2014 at 05:20to be migrated, sourceId: 2819:B33A1EDD-DCC4-4087-BEFC-454F45B13F1B

Posted on April 15, 2014 at 11:50Hi, I wanted to integrate the free SDCC Compiler in STVD. But I can´t find a possibility to add a new toolset. If I install Raisonance, a new entry in the toolset dropbox is generated. So there must be a possibility to add a user toolset. But how? Best regards.

Posted on April 04, 2014 at 05:15Hello, I have been able to develop an STM8S007 project with STVD and cosmic C.  I have been able to test the project with no compile errors etc. When I use STVP to program the .S19 file into the chip, everything programs OK and verifies OK. When I remove the ST-LINK/V2 from my PCB and turn the power on I find that the STM8 seems like its not running. Why would my code run when debugging but not when flashed?  Any ideas on how to troubleshoot this?

Posted on March 17, 2014 at 14:28Hi all! Does anybody know, how to program option bytes from IAR, during downloading flash image, like it implemented in STVP? Maybe, using some scripts to automate. I will need to program few hundreds of uCs, and setting those bytes every time manually will be boring a little bit :) #stm8 #option-bytes #iar

Posted on April 01, 2014 at 21:04I'm exploring an STM8L152 on the Discovery Board. That board has a user button, which I have set to trigger an interrupt on a GPIO (pin C1, if that matters). I can watch the interrupt fire in the debugger (using STVD), and right now my ISR has only the disableInterrupt() command and return. The ISR never exits, though, looping continuously. I have not had this problem on an STM8S105. Does anyone have some insight into what might be going on? Thanks. [UPDATE - Guys, never mind. It looks like on these machines you must manually clear a pending external interrupt flag via the EXTI->SR1 register, unlike on some other 8's, which have no flags. Then, by some perverse logic, clearing the bit actually means writing a ''1''.] #stm8l #external-interrupt

Posted on March 29, 2014 at 12:02Hello everyone, I just started learning STM8 assembly language, but can not find the decimal adjust instruction, so do not BCD arithmetic.Have thought about writing a decimal adjustment subroutine, the addition should be able to overcome, but subtraction instruction (SUB SBC) does not affect the H flag, so after BCD subtraction does not know how to adjust.May I ask how to properly use assembly language do BCD addition and subtraction?

Posted on March 27, 2014 at 18:04I am timing the ADC conversion from TRGO to EOC.  I calculate that the conversion should take 3.5us but I measure a minimum of 4.0us using an oscilloscope.I have included the relevant code loop below.Please does anyone know where the extra time is coming from?  My application requires close coordination of the ADC with external signals. //////////////////////////////////////////////////////////TRGO = TIM1 CH4 = (counter=0x01)ADC clk = 4MHzconversion = 14 clocks / 4Mhz = 3.5usmeasured: 4.0us (minimum) between toggles////////////////////////////////////////////////while(!(GPIOC->IDR & 0x08)){} //  wait for pwm sig high (counter=x)for (tempi=0; tempi<5000;tempi++){ while(GPIOC->IDR & 0x08){} //  wait for pwm sig low (counter=0) GPIOB->O

Posted on March 13, 2013 at 13:22Hi all. I got a problem: Every time i am setting a global variable in my ISR it is set to 0 after the ISR has ended!volatile int test; void main(void){ TIM1_DeInit();  TIM1_TimeBaseInit(10, TIM1_COUNTERMODE_UP, 20000, 0); TIM1_ITConfig(TIM1_IT_UPDATE, ENABLE);  TIM1_Cmd(ENABLE);   /* Infinite loop */ enableInterrupts();   while (1)  { test = test;  }  }INTERRUPT_HANDLER(TIM1_UPD_OVF_TRG_BRK_IRQHandler, 11){  test = 1 ;}Test is always 1 in the ISR but always 0 in the main??.. WHY??Thanks in advance :) 

Posted on March 18, 2014 at 14:38i have made program for DiscoveryL152, with STM8L152. mcu. Program works properly. Now i try to start this program on other board with STM8L052C6 mcu. LCD not works - all COMx and segment pins are idle...... In all ST documents i have not found out any difference between  052 and 152.... All advices would be helpful. Thanks in advance

Posted on March 18, 2014 at 13:49i have made program for DiscoveryL152, with STM8L152. mcu. It works properly. Now i try to start this program on other board with STM8L052C6 mcu. LCD not works - all COMx and segment pins are idle...... In all ST documents i have not found out any difference between  052 and 152.... What i do wrong?Thanks in advance

Posted on January 02, 2013 at 10:32Hi friends,  I am new to stm microcontroller, when i am compiling my project with st visual develop with cosmic compiler it giving an error like this:&sharperror clnk Debug\stvd_project.lkf:1 no default placement for segment .dataeeprom&sharperror clnk Debug\stvd_project.lkf:1 no default placement for segment .LPRUN The command: ''clnk -l''C:\Program Files\COSMIC\CXSTM8_EVAL\Lib''  -o Debug\stvd_project.sm8 -mDebug\stvd_project.map Debug\stvd_project.lkf '' has failed, the returned value is: 1exit code=1.How can i solve this. #cosmic-m24lr-build

Posted on March 11, 2014 at 17:16Cosmic STM8 is installed in Windows XP with license. Since we are working in a networked-host, we will access such Windows XP host using Windows XP remote desktop access. When Cosmic STM8 is started from the physical Windows XP host, everything is working. When access such Windows XP host over XP remote desktop, we have error ( details at the end). We cannot compile. Is there anything we can edit or added or .. when using remote desktop. fyi, we use debian rdesktop to access windows xp. Thx for any info. ---------  error message when using remote desktop #error cpstm8 C:\Program Files\COSMIC\CXSTM8_32K\Hstm8\modsl0.h:1 FlexLM Cannot checkout an uncounted license within a Windows Terminal Services guest session. src\stm8s_gpio.c:  The command: ''cxstm8 +mods

Posted on February 27, 2014 at 14:44Hi all! I am using STM8S003F microcontroller with UART in async mode. I want to use UART1_CK pin as regular GPIO in push-pull mode. This pin is PD4. When peripherals are configured as below:    PD_DDR_DDR4 = 1;   //  Pin PD4 (EN) is output     PD_CR1_C14 = 1;    //  Pin PD4 is set to P-P mode.     PD_CR2_C24 = 1;    //  Pin PD4 can run up to 10 MHz.    UART1_CR3_CKEN = 1; and byte is transmitted via UART, I see clock meander appearing on PD4 on each byte transmission. Then I disable UART clock output by writing:   UART1_CR3_CKEN = 0; After that pin PD4 goes low, and writing    PD_ODR_ODR4 = 1; gives nothing. High logic level doesn

Posted on January 24, 2012 at 08:25MCU: STM8S105C6Port: GPIOBBit: 2 GPIOB:2 is the only pin/bit set up for external interrupt, yet regardless of any edge sensitivity setting in EXTI_CR1, once an interrupt is invoked it is continuously invoked while ever the input pin is low. As the STM8S appears to have has no register for clearing an interrupt flag, what mechanism am I missing?   Other posts have discussed similar experiences but have not been conclusive in an answer.The project manipulates registers directly rather than through ST's FWLIB. Workalot

Posted on February 20, 2014 at 14:13Hi all,I cannot find what the meaning is of those E/H/L parts of the address! Nowhere in the datasheets are the abbreviations explained. I presume H and L are the High and Low ockets but what is E?I don't understand why you want to put the high byte before the middle byte.Can somebody clarify?Regards.An #flash-programming-stm8s

Posted on November 10, 2013 at 19:22 Hello, Is there any software library that allows to build USB hardware with STM8 microcontroller without any additional chip? I am looking it but I have not found anything so far. Such library would greatly improve value of STM8 microcontrollers (and volume of sale) as it would open possibility to construct the broad set of applications. For Atmel AVR 8bit there are at least two nice solutions that runs on any AVR microcontroller with at least 2 kB of Flash memory, 128 bytes - e.g. ATTiny2313. 1 - V-USB is a software-only implementation of a low-speed USB device for Atmel�s AVR microcontrollers 2 - LUFA (Lightweight USB Framework for AVRs, formerly known as MyUSB) If you have such library you can build a lot of useful applications e.g. Android Accessory Host Audio In Device Audio In Host Audio Out Device

Posted on February 28, 2014 at 12:07I set a floating-point (*data) , (*data) = (*data)/(pow(10,Strlen-3-DotPos)),(*data)=1234,pow(10,Strlen-3-DotPos)=100, the result was 12.33999 how did that happen? And I want to get an aprecise result 12.34.  How to do? Right now I am doing my project by your MCU and I am eager to know the answer! Thank you !!

Posted on February 24, 2014 at 18:00Hi! I have been working with this discovery board for several weeks now and almost close to finalizing my design for a first prototype. But I always need to manually reset the MCU for my code to run from flash, I give 5V directly to Pin 2 of JP1. I ignored this problem all this while thinking it may be OK after I remove the SB1 and SB2. But then today I see that even with those removed, the MCU does not boot and I need to reset manually by shorting pins 3 and 4 of CN7. Also, as per STM8 manual only a 0.1uF is required externally as this MCU has internal POR and pull-up. But the discovery board has a 10nF only, I tried changing this to 0.1uF, still no use. Anyone faced such issue, please help. I fear the internal POR is not working well.Thanks & Regards #spi:use-spi_nss_soft-if-nss-open #discovery-can't-boot #por-issue

Posted on February 22, 2014 at 14:34I wrote a program receiving and transmitting data to the microcontroller STM8 (Tested on STM8S103F3)But so far not implemented in full support of the protocol itself USB :( Source code and description in Russian (very short). http://ziblog.ru/2014/02/22/programmnyiy-usb-na-stm8-chast-2.html #usb #software #stm8

Posted on February 04, 2014 at 14:31My STM8 Cosmic compiler (32K limited) does not work anymore because it seems that the free licence is out of date (but it isn't: it will run out August 2014). Compiler Error is: '' </p>   #error cpstm8 C:\Programmi\COSMIC\CXSTM8_32K\Hstm8\mods0.h:1 FlexLM Feature has expired.  It seem that the Compiler changed its own path to look for the licence.   Could anyone help me ?    Thanks. Stefano </b>

Posted on October 21, 2013 at 03:28I've checked the Option Bytes and the OPT3 byte is zero so the WDG_HALT bit is 0 which means that the MCU should enter Halt Mode without causing a reset when the watchdog is enabled. However a  HALT or WFI generates a reset. I refresh the watchdog counter prior to the halt instruction and it still generates a reset.  If I do not set up IWDG then no reset is generated and the program continues correctly when it comes out of halt by an interrupt. I have set and reset the option byte for WDG_HALT  but it always generates a reset when the IWDG is enabled by software and halt is entered.  What should I set up to overcome this?  Is this a known problem with the chip? #stm8s-halt-iwdg

Posted on February 04, 2014 at 11:50Hi I'm using the 8K limited IAR Kickstart compiler on the STM8L051F3 (8K) I'm using EEPROM and get the following 3 Linker errors Error[Li005]: no definition for ''__eeprom_program_byte'' [referenced from eeprom_util.o(dlstm8smn.a)] Error[Li005]: no definition for ''__eeprom_wait_for_last_operation'' [referenced from eeprom_util.o(dlstm8smn.a)] Error[Li005]: no definition for ''__eeprom_program_long'' [referenced from eeprom_util.o(dlstm8smn.a)] The functions are not mine. They are IAR library functions. Does the Kickstart compiler support EEPROM? Is there a special include file needed for EEPROM? I've scanned through the General and Linker options and changed a few settings but to no avail. Any suggestions? Thanks Andre