STM8 MCUs

Posted on April 16, 2012 at 09:13Hi,Is it possible to program stm8s mcu s via comport/usb with interface card(maybe max232 chip etc.)?I dont need debugging.Programming will be ok.What should I do for that?Can I use STVP with my custom interface board?All helps will be appreciated #flash-programming-stm8s

Posted on April 14, 2012 at 11:40 I am new at this so please be gentle with me :) I am struggling to get the CCO pin to output the current clock frequency and I'm struggling. I have checked out the examples in the STM8S library (version 2.1), in particular the CLK_MaxSpeed example and I seem to be getting no where. For the hardware I am just using the Discovery board and I have hooked a scope to CN4, pin 4 which I believe is the CCO pin. For the software I have distilled the following from various examples: #include ''stm8s.h'' #include ''stm8s_gpio.h'' #include ''stm8s_clk.h'' int main( void ) { // // Initialise the clock // CLK_DeInit(); CLK_SYSCLKConfig(CLK_PRESCALER_CPUDIV1); // CPU Prescaler = 1. CLK_SYSCLKConfig(CLK_PRESCALER_HSIDIV1); // Prescaler = 1. CLK_CCOConfig(CLK_OUTPUT_CPU); // Output clock on CCO pin. CLK_ClockSwitchConfig(CLK_SWITCHMODE_AUTO, CLK_SOURCE_HSE, DISABLE, CLK_CURRENTCLOCKSTATE_DISABLE); // // Initialis

Posted on April 04, 2012 at 14:17Hi, I'm using COSMIC's CXSTM8 in STVD environment. My Problem: With my last Compiler/Linker I was sure, that unused procedures automatically were not linked to the resulting file. Now I am rather short of programm memory and have to elaminate all the unused procedures of my funtional modules for each special project. Can the programm do it for me? perhaps by an optimizing linker option???? Best regards, WoRo

Posted on December 14, 2011 at 22:47Hello, I have problem with initialization UART2 in my project(STM8S105). Below you can see part of my code, what am i doing wrong? I'm trying to send sign to LCD display. ...void UART2_Cmd(FunctionalState ENABLE); void UART2_InitGPS() {     UART2_DeInit();     UART2_Init( (u32)9600, UART2_WORDLENGTH_8D, UART2_STOPBITS_1, UART2_PARITY_NO, UART2_SYNCMODE_CLOCK_DISABLE, UART2_MODE_TXRX_ENABLE);    } void UART2_SendData8(u8 Data); u8 UART2_ReceiveData8(void); void main(void) {     char tmp;     LCD5110_init(); //function which initialize LCD     LCD5110_set_XY(0,0); //function which set rows and columns in LCD     UART2_SendData8(36);

Posted on March 26, 2012 at 22:26Has anyone come up with a way to use GPIO ports as I2C? My current app uses an external I2C mux to make three I2C channels. I would like to replace this HW with independent I2C output from the STM8. So I would have three I2C master addresses on the MCU. ThanksJeff

Posted on March 05, 2012 at 03:59If it's possible to use LSE as the clock source of TIM1 or TIM2/3/5 or TIM4 ?Use LSE as external trigger of  TIM1 or TIM2/3/5 or TIM4 is accepted too, if possible please share some code sample. #stm8-timer-lse

Posted on March 15, 2012 at 05:57I'm trying to get I2C working, I've verified I can manually toggle the pins at 400KHz with a pull up resistor. I can't seem to get the I2C code to work correctly though.    input_clock = CLK_GetClockFreq()/1000000;     I2C_DeInit();     I2C_Cmd(ENABLE);     I2C_Init(I2C_MAX_STANDARD_FREQ,         0xA0,         I2C_DUTYCYCLE_2,         I2C_ACK_CURR,         I2C_ADDMODE_7BIT,         input_clock);     (void)I2C->SR1;     (void)I2C->SR3;         while (1)     {         while (I2C_GetFlagStatus(

Posted on March 14, 2012 at 13:25I am unable to understand the IAR files involved in developing an application for STM8S103F3. Specifically, the files involved for interrupts and where to write the ISR for the interrupts, when using the IAR IDE. Further, will appreciate if someone can share some sample codes specific to STM8S103F3 and IAR IDE. Thanks, Dipen

Posted on March 08, 2012 at 20:57 Hello, I try measure frequency 50-500Hz. I use STM8S-DISCOVERY KIT with STM8S105C6T6 and FWLib. How initiate the appropriate timer and which port to use? #include ''stm8s_conf.h'' #include ''stm8s.h'' #include ''stm8s_it.h'' #include ''stm8s_tim1.h'' #include ''stm8s_gpio.h'' void init( void ); void GPIO_app_init( void ); void TIM1_app_init( void ); main() { init(); enableInterrupts(); while (1) { TIM1_SetCounter(5); tim1freq = TIM1_GetCounter(); } } void init( void ) { GPIO_app_init(); TIM1_app_init(); return ; } void GPIO_app_init( void ) { } void TIM1_app_init() { TIM1_DeInit(); TIM1_TimeBaseInit(31, TIM1_COUNTERMODE_UP, 65535, 0) TIM1_CounterModeConfig (TIM1_COUNTERMODE_UP); //TIM1_ICInit(TIM1_CHANNEL_1,TIM1_ICPOLARITY_RISING,TIM1_ICSELECTION_DIRECTTI,TIM1_

Posted on February 15, 2012 at 20:16Is there any good library to manage the STM8S I2C peripheral running as a slave?I have tested some examples and I'm having many problems in noisy environments, the bus is busy but both slave and master wait for the other one.Thank you in advance

Posted on November 22, 2011 at 16:17hello, I'm trying to trigger the ADC1 with the TRGO signal of TIM1, here is the code that I,m using to configure the timer: TIM1_DeInit(); TIM1_TimeBaseInit(128, TIM1_CounterMode_Up, 62500, 0); TIM1_SelectOutputTrigger(TIM1_TRGOSource_Update); TIM1_Cmd(ENABLE); while for configuring  the ADC1 and getting the conversion result I'm using (adapted from STM8L-discovery firmware): u16 ADC_CH3_TRIG(void) {     uint8_t i;     uint16_t res; /* Enable ADC clock */   CLK_PeripheralClockConfig(CLK_Peripheral_ADC1, ENABLE); /* de-initialize ADC */   ADC_DeInit(ADC1); /*ADC configuration   ADC configured as follow:   - Channel 3   - Mode = Single ConversionMode(ContinuousConvMode disabled)   - Reso

Posted on March 09, 2012 at 04:26Hello all, I connected crystal 32.768 khz to pin C5,C6 of stm8l151. I want to use RTC-calendar but look like crystal not work.   /* Enable LSE */   CLK_LSEConfig(CLK_LSE_ON);   /* Wait for LSE clock to be ready */   while (CLK_GetFlagStatus(CLK_FLAG_LSERDY) == RESET);   /* wait for 1 second for the LSE Stabilisation */   LSE_StabTime();   /* Select LSE (32.768 KHz) as RTC clock source */   CLK_RTCClockConfig(CLK_RTCCLKSource_LSE, CLK_RTCCLKDiv_1);   CLK_PeripheralClockConfig(CLK_Peripheral_RTC, ENABLE); Please help me Thanks all,

Posted on December 08, 2011 at 15:57In debugger STVD permanently there are failures. Only reboot helps

Posted on March 06, 2012 at 19:36I want the device  to be ''like a virgin''. I've tried STVP but erase option is  not visible there. Why?What is another method to erase the chip ? Is that possible to be done by EWSTM8 of IAR ?Thanks,E.L.

Posted on January 14, 2012 at 21:56Hello,STM8L has 2 comparators: COMP1and COMP2. COMP2 is very useful as it has an ability to get any desired threshold: either internal or external. The only threshold for COMP1 is internal Vref, so I'm wondering what can be it used for ? I'm aware of window comparator ability with both of them, but can somebody here think about application of only COMP1? What COMP1 can do, can do also a digital port, having also Schmitt trigger option.Any idea will be highly appreciated,E.L. 

Posted on June 16, 2011 at 07:38Good day, I've started some time ago with the STM8S Discovery, STVD and Cosmic limited to 16k. I'm now at the point where i need to answer the following: - How can I check how much memory space on the chip is being used by my application? Ideally i'd like to know precisely where program segments are stored as well as how much RAM is allocated. - Can I configure the environment so that it stores (e.g. while loading the program onto the chip) some data in the remaining 16k of the Flash? (Cosmic will produce up to 16k of code so there's at least 16k available on the chip for data storage). NB: this data might change while the application is running, so i don't want to declare it as constant data. Thanks and kind greetings, Nick 

Posted on February 27, 2012 at 17:05Hi, I'm using ST Visual Develop 4.3.0 to write code for an STM8L. Is it possible to set-up a project so that its output is a library rather than a hex file? I've got driver code that I'd like to use in a different project.   Thanks, Ben

Posted on September 07, 2011 at 15:38When the JP instructions jump less than 92H I haven't any problem, but if it jumps more than 92H the JP and Call command do not work properly. I am sure to be in the same section because I use STM8S105C6. Example1: 0x80E8 jp Base if the label Base is an address 0x8110 the compiler translates in JP 0x8110 >>Correct if the label Base is an address 0x8181 the compiler translates in JP 0x8081 >>Wrong if the label Base is an address 0x8259 the compiler translates in JP 0x8159 >>Wrong if the label Base is an address 0x8349 the compiler translates in JP 0x8149 >>Wrong if the label Base is an address 0x83B5 the compiler translates in JP 0x80B5 >>Wrong Example2: 0x83DD jp Base2 the label Base2 is an address 0x8685 the compiler translates in JP 0x8085 >>Wrong After 0x817B every label must have the ''.w'' s

Posted on February 14, 2012 at 04:33Hi All,    I have problem with my I2c while communicating with Gyro, i have configured my micro as master mode with standard mode , Some times SCL and SDA go low after i receive some bytes from gyro. i am using STM8l151G3 micro. I have checked rise time and fall time , they are correct , i couldn't figure out why this is happening , i am reading one byte of data from gyro using polling method.If i decrease clk frequency to 80Khz then it starts working fine. Please check my code for I2c communication below and let me know any corrections to be done. Read procedure for one byte is as shown below. uint8_t GyroRead(uint16_t ucGyro_reg_Address) {     uint8_t ucReceivedData;     uint8_t    ucFlag1;     uint8_t ucFlag2;     uint8_t ucFlag3;  &n

Posted on February 23, 2012 at 23:15HelloI'm using STM8l discovery kit ,and I want to use RTC to have real time of some events,but I want to get accuracy of millisecond not just second(I dont find anything about it in RTC lib),how can I have it?

Posted on February 21, 2012 at 12:20I plan to do 8bit 128 samples FFT with STM8 16Mhz MCU. For my application? only 14 ms for FFT.Does ST offer STM8 FFT module, or anyone can guide me to the optimized STM8 FFT software module.   #stm8-fft-asm

Posted on February 13, 2012 at 16:01Hi! I have a probem with a simple software that I've wrote to learn to use timers.This is the code that I've used.&sharpinclude ''stm8l15x.h''main(){   TIM4_DeInit(); TIM4_TimeBaseInit(TIM4_Prescaler_2048, 200); TIM4_Cmd(ENABLE); GPIO_DeInit(GPIOC); GPIO_DeInit(GPIOE); GPIO_Init(GPIOC, GPIO_Pin_7,GPIO_Mode_Out_PP_High_Fast);  GPIO_Init(GPIOE, GPIO_Pin_7,GPIO_Mode_Out_PP_High_Fast);      while(1) { if (TIM4_GetCounter() == 0) GPIO_SetBits(GPIOC, GPIO_Pin_7); else GPIO_ResetBits(GPIOC, GPIO_Pin_7); if (TIM4_GetCounter() > 0) GPIO_SetBits(GPIOE, GPIO_Pin_7); else GPIO_ResetBits(GPIOE, GPIO_Pin_7); }}Practically the counter do not start, his value is sto

Posted on February 09, 2012 at 20:15I'm using IAR EWSTM8 1.30.2 Kickstart to compile a STM8S003F project. USE_STDPERIPH_DRIVER is defined and I use the library. The software works fine, but I have seen in the output executable (HEX, binary, ELF...) some string constants with the library source code filenames. This is part of ''output.bin'':(...)â€�´Ã�Ÿ)Ã�΅Ã�‰î  èÃ�Å’Ã�¾TT“® ¿ “Ã�â€�?®¿ ¾r°  Â¿“X\¿ ¾Ã�â€�?®¿® ¿ “Ã�â€�?®³%Ÿ«þÇPñ̌ǐŸ«ÿÇPñÌŒÇD:\Project\M11\power\software\STM8S_StdPeriph_Driver\src\stm8s_adc1.c D:\Project\M11\power\software\STM8S_StdPeriph_Driver\src\stm8s_beep.c D:\Project\M11\power\software\STM8S_StdPeriph_Driver\src\stm8s_exti.c D:\Project\M11\power\software\STM8S_StdPeriph_Driver\src\stm8s_gpio.c D:\Project\M11\power\software\STM8S_Std

Posted on February 09, 2012 at 11:57Hi, I'm running windows 7 64 bit, my target is STM8S103F2U. STVD gives me this error when trying to debug: ''failed to download application: error: swim error [30103]: rlink communication error''.    Rlink does not have problems because works fine with STVP on the same PC and can read and write micros. So at the moment I can't debug. Does anyone know how to solve this problem? Thanks in advance #stvd-rlink

Posted on January 19, 2012 at 10:27Hello.I am new for this CPU. I use the discovery board to test my SW.I use 3 pin on GPIOA pin 1 2 and 3:GPIO_Init(THRUSTER_STATE, BOW_STATE , GPIO_MODE_IN_PU_IT); // PullUp input with interruptGPIO_Init(THRUSTER_STATE, STERN_STATE , GPIO_MODE_IN_PU_IT); // PullUp input with interruptGPIO_Init(RF_BUTTON_PORT, RF_BUTTON_PIN , GPIO_MODE_IN_PU_IT); // PullUp input with interruptEXTI_SetExtIntSensitivity(EXTI_PORT_GPIOA, EXTI_SENSITIVITY_FALL_ONLY); pull-up is okbut when I run debugg it seam at interrupt work low only? Why I have done wrong? and it seans at pin 1 of GPIOA not working.. perhaps it used on this board already.Thierry  #stm8s-discovery