STM8 MCUs

Posted on September 08, 2011 at 11:07Hello,I am using STM8S208MB MCU for my application and need to design a Low Pass Filter for 500 Hz on the Analog Inputs. Has anybody designed and implemented this kind of LPF using the MCU. I need the filter of first or second order. Is it possible to implement it in the MCU??Are any documents available on ST site or Internet??Awaiting for positive repliesThanks & Regards,Pranav #low-pass-filter #fir #iir #lpf #filter. #low-pass-filter

Posted on October 09, 2011 at 14:38Hi:    STM8S105C6 is used in my project.    I want to create the interrupt process in main.c, the compiler is cosmic.    In general, the interrupt function is created in stm8_interrupt_vector.c. So i want move it into the file of main.c.    Can you tell how to do? thanks! Best Regards! Fred    #describe-the-goal-not-the-step

Posted on June 16, 2011 at 16:10Hi, I read Unique ID from address 0x48CD to 0x48D8, byte per byte, on two STM8S105C6 with functions provided by stm8s_flash.c [FLASH_readbyte()]. The results are: x wafer: 0x001B y wafer: 0x800D n wafer: 0x00 lot n: 0x00312C28706431 and: x wafer: 0x001C y wafer: 0x002A n wafer: 0x00 lot n: 0x002C2870643129 is ''y wafer 0x800D'' a sign-abs number? what readout method do you use? Thank you very much. #stm8s-stm8-stm8s105-unique-id-96-bit-bits

Posted on September 02, 2011 at 11:10From what I can see this is used to check in parameters into the c library functions. I've tried to add this to a header file but when I do so the compiler creates many unrelated errors. This is what I am adding:- Has anyone had the same problem? I'm putting it into the top .h file #define USE_FULL_ASSERT    (1) /* Exported macro ------------------------------------------------------------*/ #ifdef  USE_FULL_ASSERT/**   * @brief  The assert_param macro is used for function's parameters check.   * @param expr: If expr is false, it calls assert_failed function   *   which reports the name of the source file and the source   *   line number of the call that failed.   *   If expr is true, it returns no value.   * @retval

Posted on April 14, 2011 at 19:23Why my stm8s103f3 can not enter into uart rx interrupt?

Posted on May 17, 2010 at 15:35Hello, Right now im playing around with the ST8M8 Discovery board, i have followed some tutorials and have build a few projects that fade the LED using the PWM signal. I would like to use the SPI bus in the future to read and process data from a mem sensor. Could someone please point me in the right direction to a tutorial to using the SPI bus, or maybe provide me with an example project? Any help would be appreciated #spi-example

Posted on August 25, 2011 at 12:20Hello, I am trying to control a robot arm with a stm8s discovery. I got the board as well as the users manual. The manual tells me to first install ST visual develop, and then Cosmic compiler. I was supposed to go to http://www.st.com/stonline/products/support/micro/files/sttoolset.exe , but it redirected me to http://www.st.com/stonline/stappl/resourceSelector/app?page=resourceSelector&doctype=TOOLSET&FamilyID=141 I downloaded the ''ST9 software toolchain'' supposedly carrying the STVD9. I then downloaded cosmic compiler. All this has been done on a windows XP computer as well as a

Posted on October 11, 2011 at 10:43Hi,I'm trying just to learn a bit about the Flash technologies. Since I'm just starting, my question is not too ''professional'', sorry (-:.I know today there are 2 main flash types : NOR and NAND. Referring to STM8L, what is the Flash type used there ? Since the w/r operations look relatively fast in STM8,  I guess it utilize NAND or perhaps internal FLASH memory of MCUs is neither one of the mentioned types ? Thank you in advance. #eeprom #what-does-eeprom-stand-for #memory

Posted on March 06, 2011 at 23:34STM8 EXTI Clear Interrupt Flag #interrupt #gpio #exti

Posted on October 06, 2011 at 15:24Hi all, I'm use the STM8S103K MCU with COSMIC + STVD + STLINK debugger. I setup TIMER1 to generate a bitsequence (each 14ms) on an output pin during timer overflow. Everything is fine as long as the debugger is connected to the device (load the code to the MCU). Now I disconnect the debugger and switch off the power of the MCU. After power on the MCU now, the bitsequence which is generated is very slow( now 448ms). The timing difference ist exact factor of 32. There are any ideas, what kind of things I do wrong? I use the HSI with prescaler 1, CPU prescaler is also 1. I never had such a problem with other projects. How can I debug this? Thanks for any help! SMPS_Gerd #timer-hsi-debugger-stm8s-cosmic

Posted on October 10, 2011 at 21:47Hi all, some piece of code to manage a rotary encoder potentiometer. The model I use is from the chinese market maybe by TREXON. I'll propose both interrupt and polling mode. The interrupt code has been adapted from http://www.arduino.cc/playground/Main/RotaryEncoders and the polling one from http://stackoverflow.com/questions/34735/using-a-rotary-encoder-with-avr-micro-controller. Find also the interrupt handler (just modify the stm8s_it.c code as indicated). The code is a part of a hobby project which is a PLL 2.4GHz signal reference generator. The rotary potentiometer if for making a ''knob'' for such a gener

Posted on October 10, 2011 at 03:26I found if i disable the SWUART_TRANSMIT_USED ,it will hang in TIMERx_UPD_OVF_BRK_IRQHandler and can not run out of it. In this function: #ifdef SWUART_TRANSMIT_USED  uart_Tx_timing(); #endif  The clear_owerflow_flag define is called in uart_Tx_timing, so should i move this sentence out? void TIM2_UPD_OVF_BRK_IRQHandler(void) interrupt 13 { clear_owerflow_flag; #ifdef SWUART_TRANSMIT_USED  uart_Tx_timing(); #endif } Thanks, Cgha

Posted on July 23, 2011 at 10:38Hi All, Yesterday i just got stm8s-discovery board.I don't know how to make use of it to the max since i am unaware about the compiler used with stm to build the code and other info regarding STM, till today i am familiar with AVR not with stm kindly please help me to start with stm. #lmgtfy #lmgtfy---stm8-tools

Posted on October 05, 2011 at 18:29if stm8_tsl_conf.h select GPIOE:#define SCKEY_P1_PORT_ADDR  (GPIOE_BaseAddress)  /**< Single channel key Port 1: GPIO base address */ IAR stopped on - ''__iar_unhandled_exception''

Posted on October 09, 2011 at 07:29Hi all , I have try to compile default code ( discovery demo ) and everything runs fine. After which i try to create my own application following the guide : UM0991 <Building, debugging and running your application with STVD>  page 47 onward. After the all the setting and work , i try to compile but was given the following error (i did not induce any code the main.c yet)... Any one knows what wrong ? Compiling ..\..\..\..\libraries\stm8l15x_stdperiph_driver\src\stm8l15x_gpio.c... rcstm8 ..\..\..\..\libraries\stm8l15x_stdperiph_driver\src\stm8l15x_gpio.c OBJECT(Debug\stm8l15x_gpio.o) PIN(''C:\Program Files\Raisonance\Ride\inc\STM8'') PIN(''C:\Program Files\Raisonance\Ride\inc\ST7'') PIN(''C:\Program Files\Raisonance\Ride\inc'')  DGC(page0) AUTO WRV(0) PR(Debug\stm8l15x_gpio.lst) CD CO SB  OT(0) DEBUG STM8(SMALL) PIN(..\..\inc) PIN(..\..\..\..\li

Posted on September 18, 2011 at 19:13I use STM8 Assembler. Code: ...... CLOCK EQU 16000 TIME EQU CLOCK/1000 .... compile error Error 67: Improper Character(s) '/1000' Why? I find :) TIME EQU {CLOCK/1000} Works without errors

Posted on November 13, 2010 at 07:52Hello, I am unable to debug on the STM8L-Discovery using STVD, I always get this error when trying to start a debug version: Connection error (usb://usb): swim error [30004]: comm timeout I tested STVD versions 4.1.5 and 4.2.0 with the same result. Programming the device using STVP works perfectly so it should not be an hardware problem. Debugging on a STM8S-Discovery works too so it is seems to be an STM8L-Discovery specific problem. Does anybody know a workaround? right now I am unable to use the new discovery kit. Giovanni ---http://chibios.sourceforge.net/dokuwiki/doku.php?id=start

Posted on September 22, 2011 at 11:20Hi, I'm working on the STM8S-Discovery board with the Cosmic compiler in STVD 4.2.1 patch 2.  When debugging and stepping through the code there is no information in the disassembly and memory windows.  I'm sure there must be a switch somewhere to turn it on in the configuration but I can't find it.  Any ideas? Paul #stvd-cosmic-stm8s-discovery

Posted on September 21, 2011 at 00:02Hi all,I am working a project that has a SPI master on an OMAP-L138.  I had the four lines manually wired across from the OMAP-L138 to the STM8-S discovery board.  The connections are below:OMAP SPI CS -> STM8 SPI NSSOMAP SPI SCLK -> STM8 SPI CLKOMAP SPI MOSI -> STM8 SPI MOSIOMAP SPi MISO -> STM8 SPI MISOThis is my initialization function of the SPI as a slave. static void enable_spi_slave(void){ SPI_DeInit(); SPI_Init(SPI_FIRSTBIT_MSB,      SPI_BAUDRATEPRESCALER_8,      SPI_MODE_SLAVE,      SPI_CLOCKPOLARITY_LOW,      SPI_CLOCKPHASE_1EDGE,     SPI_DATADIRECTION_2LINES_FULLDUPLEX,     SPI_NSS_HARD,   &n

Posted on September 14, 2011 at 15:24Hi all, I am busy modifying my code so that I can utilize a custom bootloader. My application code is running and compiling with no problems on its own. The problem begins when I try to shift the start address of the code and interrupt vector to 0x9090 and 0x9000 respectively. The symptom is a list of linker errors of the following format - &sharperror clnk Release\sr.lkf:78 Release\request.o: section boundary crossing (.text:0014) I have followed the instructions in AN2659 which only requires to change the addresses of the code and interrupt vector in the project's settings (settings->Linker Input) I have checked the MAP file of the compiled version before the shift and there is no code space issue (the code is around 36K and I am using a 64K processor). Any explanation/assistance would be much appreciated. Thanks, Noam.

Posted on September 16, 2011 at 15:34 Hi, I am trying to download my application using the flash loader demonstrator and I am running into a problem at the same point each time - After 82% of the download the communication stops (see attached screen capture of FlashLoader before and after the failure) I have monitored the port with a serial port monitor (from HHD) and it looks like the application itself stops sending the data. Attached is the serial port monitor capture of the last communication from the flash loader side - there is a full block sent, then a start of a write memory command (0x31 0xCE) and then nothing (see attached screen dump of SerialPortMonitor)... Has anyone encountered that before? Any idea why? Can it be related to the .s19 file (I had issues getting the application to compile - see my other post on

Posted on September 06, 2011 at 19:56I'm looking to measure 50/60Hz using TIM1 and pin PD7 as input has anyone an example of this? Also I don't seem to be able to select the AFR4 in the STDV anyone have a clue why?

Posted on September 07, 2011 at 22:52What is the correct procedure for registering STBLLIB.dll and Files.dll under WinXp and Win7? ''regsvr32 stbllib.dll'' under WinXP produces ''stbllib.dll was loaded, but the DllRegisterServer entry point was not found. This file can not be registered.'' Thanks in advance Helmut

Posted on August 10, 2011 at 15:13Further to a previous enquiry regarding ''The parameter is incorrect'' issue with STVD. I've installed STVD V4.2.1 and Patch 2  but I'm still struggling with this problem of ''The parameter is incorrect'' on an ST8 application using the Assembler / Linker toolchain with STM8 Assembler code. I've tried to run the ST7 example 'realtime' supplied with STVD and this will not work either. With STM8 The system loads the mapping.asm and main.asm automatically and when a build is attempted the system reports    ST Visual Develop The executable could not be found You can fix it by editing your toolset settings etc. etc. It hangs up while attempting to assemble mapping.asm  and reports Error creating process for executable asm The parameter is incorrect Failed to create process. All

Posted on September 06, 2011 at 22:27Dear,Working with Discovery board, I encountered the following problems with CCO pin:1. When HSI(16MHz) is routed to CCO, the signal on the CCO a. has a low and not stable amplitude from 500mV to 1.2V.b. The signal is a triangle wavec The signal has a DC offset2. When LSI(38KHz) is routed to CCO, a. instead of 38KHz I see 10Hz of RTC which sourced from LSI (or perhaps it is ok ?)b. A lot of pulses are lost.Regarding the problem 1 I got an answer from ST support, that 16 MHz is too fast and CCO can't drive it. With all respect to ST guy who gave me that answer, I'm not sure if the answer is correct, since if the pin can't drive 16MHz, why ST gave this ability ? Did somebody here encounter this problem too ? The problem 2 is absolutely unclear for me.Any idea would be highly appreciated.Best Regards