STM8 MCUs

Posted on September 19, 2013 at 11:21Hi, today I have a very special question: I read in the programming manual, that the instructions DIV an DIVW are interruptible. What exactly happens, when an interrupt occurs while calculating is active  - with the registers (A, X, Y) and - how does calculating continue after IRET??? Who can answer? TIA, WoRo #divw #div

Posted on May 16, 2013 at 08:18Hi, I have a problem with USART half duplex.  The output from my STM8L device is too strange. The first half (about 10 bytes) is from host.  My device can receive this well.  After that, the host is wait to receive the data from my device immediately. When my device starts to send back data to the host, the signal level is down about 300uSec.  After that, the level is back.  What is this ??? I try to do same thing with full duplex mode with connected Tx-Rx.  It looks like work well but same level down is happened between host changed Rx and my device changed Tx. I

Posted on September 02, 2013 at 20:10I know of sdcc, Cosmic C, Raisonance. Apparently, there also is ST8CC, but it seems to lack documentation, and seems to only support some restricted subset of C. Are there any other C compilers targeting the STM8? Philipp

Posted on August 06, 2013 at 15:27Hello! I'm can't programming option byte in the stm8s105c6t6 into my board stm8s-discovery. This code:  mov FLASH_DUKR,♯$56;  mov FLASH_DUKR,♯$AE;  ld A,♯%00001100; IWDG_HW and LSI_ EN set  ldw X,♯$4805  ld (X),A  incw X  cpl A  ld (X),A  Here I read option bytes,  they unchanged. Can you Help me?  #stm8 #option-bytes

Posted on September 02, 2013 at 20:05So far I have used an STM8L-discovery, but the 1K of RAM is not enough any more. I need 6K. Otherwise I just want an LED or two, some GPIO and a serial port. Any recommendation? Philipp P.S.: There is this STM8/128_EVAL bord. However the descriptions don't mention with which microcontroller it comes. The photo in the manual looks as if there was a ZIF socket for the microcontroller, so I would have to buy one separately, but the boards on ebay seem to have a microcontroller soldered.

Posted on February 12, 2013 at 23:04I'm learning how to use ST micros (after years of using PICs) and I am struggling to integrate the GPIO files. I added the stm8s_gpio.c to my project and this fixed the UNRESOLVED EXTERNAL errors however now I get a C000 and C014 error stating that ''vu8'' is undefined. What is a ''vu8'' and do I need to declare it somewhere else? I have attached my project file if that would be helpful. Thanks JM

Posted on July 09, 2013 at 09:22Hello, I'm trying to get a first program on a bunch of new STM8S207K6 but the device does not answer. It seems like the reset pin is pulled low by the controller and the programming tool keeps telling me ''Error: Cannot connect to the device !''. I tried with three controllers and with a minimum configuration with capacitors on NRST, VCAP and VDD but with no luck, all behave the same. I am able to flash another board with a STM8S003K3, so software and programmer seems to be OK. Also the 003 keeps reset high at startup. All help is highly appreciated! Thank you in advance. Best Karl E. #stm8s207k6-reset-low-stm8s-207

Posted on August 23, 2013 at 05:18My application builds fine until I add the @eeprom keyword to a declaration.  Now I get the following linker errors:#error clnk Debug\nos.lkf:1 symbol _FLASH_CR2 not defined ((C:\Program Files (x86)\COSMIC\CXSTM8_32K\lib\libm0.sm8)eeprom.o )#error clnk Debug\nos.lkf:1 symbol _FLASH_NCR2 not defined ((C:\Program Files (x86)\COSMIC\CXSTM8_32K\lib\libm0.sm8)eeprom.o )#error clnk Debug\nos.lkf:1 symbol _FLASH_IAPSR not defined ((C:\Program Files (x86)\COSMIC\CXSTM8_32K\lib\libm0.sm8)eeprom.o )Any thoughts on this one?  Cosmic has been less than responsive.

Posted on August 24, 2013 at 22:40Hello, I recently downloaded the IdeaSTM8-32k dev tool from COMSIC and have trouble saving newly entered C files.I can successfully compile and link the example code provided by COMSIC. When I attempt to include an I/O driver that was provided from ST, it also successfully compiles and links. It is when I attempt to load the project again after saving it, IdeaSTM8 always waits while ''Checking stm8s_spi.c'' and never returns. What is IdeaSTM8 checking? Any suggestions as to how to fix it?Any assistance would be greatly appreciated. #stm8-cosmic-ideastm8

Posted on August 23, 2013 at 02:54Hi sir,        we have a project. This issue is that one project include application code and bootloader code.We already study the COSMIC datasheet about the Moveable Code feature. But we can’t find that how to change ROM location of Moveable Code. ROM location always is “.text�? section.Example:                +seg .text -b 0x100 -n .my_routines -ic Debug\RAM_routines.o                Compiler always default: The Moveable Code will be at “.text�? section. It’s right. The Moveable Code can run at RAM “0x100�?.I try Example:       &nb

Posted on August 20, 2013 at 13:43How should PA0 be set up for the SWIM interface? Input? Output? Shake it all aboutput?Pretty fundamental Q I'd have thought, but I can't find any info'.plenty of fatuous 'Overviews' about SWIM but little useful info.Del (sorry I've defaulted back to grumpy mode having taken 2 steps forward and one back today ;) )

Posted on May 02, 2013 at 15:12I am using a STM8S208CB in an embedded device on a CAN network. I have initialized the CAN to use an external 8MHz crystal, 250k baud, and enabled the FIFO message pending interrupt. I have my interrupt function process all messages in the FIFO at each interrupt, in case there are more than one, before resetting the interrupt and exiting. This seems to work fine except for one little anomaly. Every once in a while, it misses an interrupt and fails to trigger. To test this, I am injecting only one CAN message on the bus at a very slow rate - once per second. I have added an output signal in my interrupt function to produce a scope trace so I can see each time an interrupt is triggered. I have my code stripped down to doing nothing except responding to CAN Rx interrupts. The scope output signal negates at each interrupt so that I see a nice steady square wave with a pulse width of one second corresponding to the me

Posted on August 12, 2013 at 07:22I am looking at using a STM8S003K3 microcontroller.When a port pin input is configured as an edge triggered interrupt what is the minimum pulse width?  Is this a true edge trigger or is it sampled?I am trying to save myself an external flip-flop.

Posted on August 10, 2013 at 01:41Can anyone help me with the problem below dotted line?  It seems like I need to set up memory spaces for the Micro Controller.  Is that ? the problem.  If so how do I fix? Thanks! GDN ------------------------------------------------------------- Running Linker clnk -l''C:\Program Files\COSMIC\Lib'' -o Debug\i2c_iap.sm8 -mDebug\i2c_iap.map Debug\i2c_iap.lkf #error clnk Debug\i2c_iap.lkf:1 no default placement for segment .MAIN_CODE #error clnk Debug\i2c_iap.lkf:1 no default placement for segment .SPI_CODE #error clnk Debug\i2c_iap.lkf:1 no default placement for segment .CLK_CONST #error clnk Debug\i2c_iap.lkf:1 no default placement for segment .CLK_CODE #error clnk Debug\i2c_iap.lkf:1 no default placement for segment .I2C_CODE #erro

Posted on August 01, 2013 at 11:56whether there are libraries for STM8 periphery? (assembler)I didn't find if at someone is, report the link, please.

Posted on August 01, 2013 at 11:24maybe I make not correct entry?so works:  #define BUSY #1...btjt I2C_SR3, BUSY, label...if BUSY not defined:;#define BUSY #1...btjt I2C_SR3, BUSY, label...so not worksBUSY isn't present on the map? or or i have not a right record?

Posted on July 31, 2013 at 21:51example:btjt PB_IDR, #1, PC-1; need it, not working.label btjt PB_IDR, #1, label; not need it, workingplease help...

Posted on July 31, 2013 at 21:45example: ld A, 1<<0|1<<3|1<<4it isn't compiled as it is correct to make record for the STVD assembler?

Posted on July 18, 2013 at 15:34I have domnloaded the free Cosmic Compiler STM8 32K and installed it. My AVG Antivirus program reports a trojan horse ''FakeAlert.NT'' in the file cvdwarf.exe (used in the Cosmic software). Have anybody experienced this or is it just a false alarm?

Posted on July 23, 2013 at 10:24Hi all,I had good experiences on STM32F4 peripherals, but I'm new to ST 8 bits family, so I'd like your feedback and help to match a good MCU at lower cost possible, and that could match that features :- 3.3V operations- USB data transfer at High or moderate speed (cost first), with a mass storage declaration (new to that too), and with firmware flashing capability by USB : is there any library/example I can start with for that purpose ?- 2 peripherals on SPI with DMA : 1x for a peripheral read operation (20 MHz capable), and one for �SD r/w : write at continuous minimum 112 Kb/s with reliability, but 896 Kb/s capable would be perfect. I planned to do it with Fats fs library. Perhaps I will need 2 DMA for that ?That point is critical because of the RAM usage... I just don't know if it's possible on an 8 bits MCU... In fact I just need to read datas on SPI, save it somewhere (wi

Posted on July 23, 2013 at 00:08I use the STM8L152M8 to drive a complex LCD. In the datasheet (Doc ID 17943 Rev 5), page 35, it is written: for PIN 52...56 (PF4...7): LCD_SEG36...39. In the reference manual (Doc ID 15226 Rev 10),  page 267, ''the SEG40..43 are respectively mapped on PF4..PF7 ports'', for a 80pin package. I think that there is a mistake in the datasheet, because LCD_SEG36...39 is valid for a 64pin package but should should be LCD_SEG40...43 for a 80pin package. Can you confirm that?

Posted on July 15, 2013 at 16:48 I want to send below command with i2c but i cant do it. I use stm8s105c6 and i can send one data each start with i2c.

Posted on June 03, 2013 at 15:44Hello,I am actually working on a project based on the Touch RC Acquisition.I have downloaded the example from the ST website, but I didn't understand why the acquisition pin is wired on Timer 1 while according the STM8 Touch-Sensing Driver User Manual, this pin should be wired on a Timer 3 pin.Thanks for your help,Best regards,Lo�c #stm8-touch-library-rc-st #stm8-touch-library-rc-st

Posted on June 30, 2013 at 13:07Can anyone help with some code to use the RTC clock as a clock. I'm using the STM8L-Discovery board and not sure how to set the chips registers and to set / read time to the LCD display. I just need a 'hello world' program to get me going. Many thanks Update> Further to this post I have noticed that there have been 75 views to this post but sadly no replies. I have now moved over to MBED using ARM core'd mcu's particularly as the ST compiler options are now costing �600-�700. Also I had a similar question that was answered within 10 minutes. So no competition here. Reluctantly it's goodbye to non ARM based ST mcu;s. Very disappointed!! #rtc

Posted on May 03, 2013 at 14:36Hi ,I am a new user of STM8.  In my project I am using Active/halt mode an it wakes up with RTC Wakeup operation. My problem is, it is always waking up same times. it's equal to 3ms. I want update auto wake up times. I am trying to change RTC_SetWakeUpCounter(30000) but it is not setting wake up times. How can ı change wake up times.Thank you for your comments.Here is the example code;///////////////////////////////////////////////////////////////////#include ''stm8l15x.h''#include ''stm8l151f3.h''#define ENABLE 1#define DISABLE 0void RTC_Config(void){ RTC_WriteProtectionCmd(DISABLE);  CLK_RTCClockConfig(CLK_RTCCLKSource_LSI, CLK_RTCCLKDiv_1); while (CLK_GetFlagStatus(CLK_FLAG_LSIRDY) == RESET);  CLK_PeripheralClockConfig(CLK_Peripheral_RTC, EN