STM8 MCUs

Posted on January 24, 2011 at 18:57Comment and uncomment feature for STVD C source code editor

Posted on January 14, 2011 at 12:56Just started to work using the STM8L-Discovery board, all the user manuals say download STM8L-Discovery_Dev.zip?????? Where in the ST site is it?  Rik, Cambridge. ENGLAND

Posted on December 30, 2010 at 00:13Hello, I want to write a program to make his test on the value of a vector. is that there is another simpler solution??GPIO_DeInit(GPIOB);GPIO_Init(GPIOB, GPIO_PIN_0, GPIO_MODE_IN_PU_NO_IT);GPIO_Init(GPIOB, GPIO_PIN_1, GPIO_MODE_IN_PU_NO_IT);GPIO_Init(GPIOB, GPIO_PIN_2, GPIO_MODE_IN_PU_NO_IT);if (((GPIO_ReadInputData(GPIOB) & GPIO_PIN_0)== 0)) &(((GPIO_ReadInputData(GPIOB) & GPIO_PIN_1)== 0))&(((GPIO_ReadInputData(GPIOB) & GPIO_PIN_2)== 1)){  //do operation 1;}else if (((GPIO_ReadInputData(GPIOB) & GPIO_PIN_1)== 0)) &(((GPIO_ReadInputData(GPIOB) & GPIO_PIN_1)== 0))&(((GPIO_ReadInputData(GPIOB) & GPIO_PIN_2)== 1))

Posted on September 05, 2010 at 00:17Hallo @ All, I'm just starting with microcontrollers, and my first one is stm8s-Discovery. GPIO, PWM and some functions of Timers I already understood, but what I still would like to learn is to write in C is an interrupt. Is it possible to write an interrupt without a timer? Could someone give me simple example for an capcom interrupt with this specification: lets say PD0 is Output, Hight (LED onboard is off at the begining) And PE6 is Input ( GPIO_Init(GPIOD, GPIO_PIN_0, GPIO_MODE_OUT_PP_HIGH_FAST);) And the interrupt should check, if the PE6 is LOW or Hight and set PD0 to LOW or hight. I would be very thankfull for your help. Best regards - Salvador

Posted on January 03, 2011 at 10:34I was about to implement a SPI communication between STM8s and another peripheral. I came across a possible misalignement between what the manual says and the remarks in the FW library code stm8s_spi.h. When the SPI_NSS_HARD bit is ZERO maybe the Software slave management is DISABLED as the manual says. On the other hand the remarks in the code library says exactly the opposite. Which one is correct? I guess the manual is fine. Thanks Stefano (A) FWLib\library\inc stm8s_spi.h ... /*** @brief SPI Slave Select management* Warning: element values correspond to LSBFIRST bit position*/typedef enum{SPI_NSS_SOFT = (u8)0x02, /*!< Software slave management disabled */SPI_NSS_HARD = (u8)0x00 /*!< Software slave management enabled */} SPI_NSS

Posted on December 22, 2010 at 23:02hello, I just started with the STM8S-discovery .can you tell me how I boot the pine 0,1,2 port B as input.and how I'm doing the test on the value entered.if (?????){    instruction 1....} 

Posted on August 29, 2010 at 11:50Dear comunty, I'm a older Microcontrollers programer. Well my question I think is easy for you. I know program microcontrollers with machine lenguage I mean: Lda ... Sta... Txa.. I don't know use C Program lenguage. Is possible to program STM8S Discovery with Mahcine lenguage? Where i can write the program In source screen where is? Thank you

Posted on December 27, 2010 at 14:08hello, I have a problem with the point number. for exemple:0.9383     0.7445     0.6478      0.5906. How to leave his number in the GPIO.

Posted on December 24, 2010 at 22:20Hi all, Here's an improved code for the 4x3 keypad with debounce and autorepeat. With STM8S 2MHz clock it performs pretty close to the PC keyboard. The action() function is out from the keypad management state machine for clarity. Suggestions and improvements are welcome. Hope it helps. Merry Xmas and happy holidays Steven u8 key = 255; u8 oldkey = 255; u8 AutoRptMax = 64; u8 AutoRptCount = 0; while(1)     {         key = GetKeyPressed(); //Scan the keypad to getting the code of the key pressed              // < Is it a valid key pressed ? >         if (key < 12) // YES         {

Posted on December 12, 2010 at 15:38The original post was too long to process during our migration. Please click on the attachment to read the original post.

Posted on December 16, 2010 at 17:29Hi all, I was studying the examples on timers and so on. I came across the source ''main.c'' in the STM8S Firmware Library package, examples/TIM2/TIM2_Input_Capture/main.c, a piece of which is shown below. This example will show you how to measure the frequency of the LSI. Although this is very clear what the purpose of activating an interrupt CC1? /* Enable CC1 interrupt */ 00057         (, ); I think we'd needn't any interrupt here ? What do you think? If you go through the same purposed example presented on TIM1 examples section, infact, there's no interrupt initialization at all... Thank you Stefano void(void)00050 {

Posted on December 13, 2010 at 20:41I would like some information on configuring Port E0 to be a clock output of 4Mhz. Is their an example someplace. charles

Posted on December 14, 2010 at 13:49has anybody ever used CCO, the configurable Clock Output?  I think I initialized it.  I enabled it.  Everything compiled but I never did anything that would set the frequency.  The output is a high.  Does anyone know of an example or what I should be doing?  I look thru the manuals and nothing seems to help me.  It seems like such a simpe function but it is difficult for me. charles

Posted on November 12, 2010 at 14:33I intialize Port A3 as a push pull output but when I call writeHigh or writeLow nothing changes on that output.  I am using a multimeter to read the output on pin 9 of cn1 charles

Posted on November 30, 2010 at 10:31 hello all Please find attached file source code and resources on my recent personal project. Stm8s-Discovery is interfaced with astts75 chip (digital I²C temprature sensor) and a graphic serialdisplay of the manufacturer μOled 96-SG1 4DSystems. The accuracy of the temperature sensor can beselected by softwarefrom 0.5 ° C, 0.25 ° C, 0125 ° Cto 0.0625 ° C. The scale measuring ranges from -55 ° C to +125 ° C. The main program just displays the temperature on μOled with 0.5°C of accuracy. I hope to improve this project very soon. You can find the datasheet of stts75 here: http://www.st.com/internet/analog/product/169jsp

Posted on July 20, 2010 at 12:07Hello all , After all your feedbacks on the HyperTerminal example, we're currently reworking the package (documentation and source code) . the new sources (um0884.rar) are in attachement of this post . in this corrected version, UART2 is initialised as :         - 9600 bauds         - 8 Data bits         - 1 Stop bit         - no parity HyperTerminal configuration must also be align to UART configuration (see figure13 & 14 png) You can also simplify the on-board conection (see figure1.png)  The Documentation is currently on rebuild and will be published as soon as possible. By the way thanks for your patience and sorry for

Posted on November 24, 2010 at 15:24How to detect disconnected CAN bus

Posted on November 22, 2010 at 19:15I am using the STM8S-discovery card and I want to convert a long to a floting point and also a float or double to an ASCII  string.  If I use a very common conversion such as atof to convert a string to a float it cannot find the prototype.  I cannot even convert an integer to a string.  I kknow some compilets will nt convert a string to a float which I could conver my float to a long and manually place my decimal point but where do I find the file for simple convversions to include in my workplace or as an include in main.c charles

Posted on November 19, 2010 at 14:50Hi,i'm new in developping , so i was wondering if anyone can help me developping the code of a pression sensor relied to the Stm8s.Can anyone give me the functions and pins to use.Thank you.

Posted on November 18, 2010 at 22:43I would like to find the spect sheet for stm8s 105c so I can see what load current is availabile on the i/o ports.  charles

Posted on November 17, 2010 at 07:30SWIM error [30007]

Posted on November 15, 2010 at 17:54I have downloaded some PDF files from ST but now I need to download LM0845.pdf and they changed their web site and I cannot ind that file.  Can anyone help me?  Please give me the link to that file or the links to thier manuals. charles

Posted on November 12, 2010 at 19:20I am using hyperterminal.com and stm8s_beep.c and when I go thru the hyperterminal toturn on th ebeeper at 2Khz I go nothing accross the piezo sounder.  I even look at itwith a scope and nothing.  What sould I see? charles

Posted on November 06, 2010 at 23:34Dear, I need your help about...I'm programing by asm, I need to use the outputs ports to control lcd numbers. i don't know how to do to prepair the port to do output port. I don't understand the port configuration and usage manual 14587 page 100 Is the adress 0x5000 the correct adress to take out the data port a?  void main(void) { #asm LD A,#2  LD $0,A  ld a,#4  ld $2,a  mov $3,$0  ld a,#8  ld $f,a   ld a,#4   ld $0x5000,a ''PORT A DATA OUTPUT REGISTRER''  #endasm

Posted on November 01, 2010 at 20:48I am using UM_0884 to learn more about STM8S-discovery and everything wa going good until I connected the beeper as shown on page 6/23.  The problem is it doesn't work. hyperterminal.c seems to work and it calls beeper enable but nothing happens.  It does get into BEEP_Cmd but how does it send information to an io port?  It looks like it uses tim2 but time2 is never initialized.  can anyone tell me were the mistake is in the manual or code? charles