STM8 MCUs

Posted on February 28, 2017 at 10:22hello,i am trying to interface ds1307 with my stm8s105c6 discovery i am not getting from where should start. i am not getting a clear idea that how rtc works. I was trying to find any library for stm8s of ds1307. can you please help me out

Posted on February 26, 2017 at 14:43The original post was too long to process during our migration. Please click on the attachment to read the original post.

Posted on February 25, 2017 at 16:09I am using STM8S003F3P6 controller.

Posted on February 23, 2017 at 02:08HiI am using 20 pin STM8s003f3 controller. I have programmed TIM2 channel 3(pin 10) in Input capture mode with capture to be made on falling edge detection on channel 3. I have enabled TIM2 capture/compare interrupt. I have also configured the option byte.I am facing problem related to interrupt, there is no pulses or signals at channel input but still execution goes into the interrupt repeatedly. I am not getting what is problem.  Please see below TIM2 initialization and interrupt code.   //TIM2 Initialization    TIM2->PSCR = 0x04;     //Deviding incoming clock by 16 Fck_cnt = Fck_psc/(2^PSC[3:0]);    TIM2->CCMR3 |= 0x01;  //CONFIGURING CHANNEL IN INPUT CAPTURE MODE     TIM2->CCMR3 |= 0x10;  //INPUT SAMPLING UPTO TWO CLOCK CYCLES    TIM2->CCER2 |= 0x0

Posted on February 19, 2017 at 03:48HiI am facing problem in Timer2 programing. It does not go into the interrupt. Please find below program of Timer2 initialization. I am using STVD for programing STM8S003F3.The Prescalar clock frequency is 16Mhz    //Configuring TIM2 for 1 ms delay generation    TIM2->PSCR =0x04;        //Deviding incoming clock by 16 Fck_cnt = Fck_psc/(2^PSC[3:0]);        TIM2->ARRH =0x03;       //ARR value with 1000    TIM2->ARRL =0xE8;           TIM2->CR1 |= 0x80;      //Auto reload preload enabled     TIM2->IER |=0x01;          //TIM2 Update Interrupt enabled     TIM2->CR1 |= 0x01;   &nbs

Posted on February 21, 2017 at 09:33Dear all,here is my code to read spi data:uint8_t TI_TDC1000_SPIByteReadReg(uint8_t addr){ uint8_t read_byte,inst; uint8_t dummy = 0x00; inst = TDC1000_READ_BIT & addr; // for read make sure bit6 is 0 //GPIO_ResetBits(TI_TDC1000_CSn_PORT ,TI_TDC1000_CSn_PIN); // CS enablewhile (SPI_GetFlagStatus(SPI1, SPI_FLAG_TXE)== RESET); SPI_SendData(SPI1, inst);while (SPI_GetFlagStatus(SPI1, SPI_FLAG_TXE)== RESET); SPI_SendData(SPI1, dummy); /* Wait to receive a byte */ while (SPI_GetFlagStatus(SPI1, SPI_FLAG_RXNE) == RESET); /* Return the byte read from the SPI bus */ read_byte = SPI_ReceiveData(SPI1);return read_byte;}I using oscilloscope and see that the data is read = 0x45, but in my code read_byte alway = 0xFF, I think somewhere wrong when spi recieve data.

Posted on January 18, 2017 at 20:59Hi,i use IAR EWSTM8 to debug and flash the STM8S103F3 controller which i have here on a small blue breakout board. Yesterday i flashed the Controller via the ST-Link V2 as always but instead of going into the debug menu, IAR gave me this on the console:C-SPY Processor Descriptor V2.20.1.176 for STM8 C-SPY Debugger Driver, ST-LINK V2.20.1.176 for STM8 Failed to set configuration with MCU name STM8S103F3P: SWIM error [30006]: Comm init error: chip does not answerThe last code i successfully uploaded was this:#include ''iostm8s103f3.h''#pragma vector = TIM4_OVR_UIF_vector__interrupt void TIM4_UPD_OVF_IRQHandler(void){ PC_ODR ^= (1<<4); //Toggle Pin TIM4_SR &=~(1<<0); //Clear Update interrupt flag}void initTimer(){ CLK_PCKENR1 |= (1<<4); //Enable Clock for Timer 4 TIM4_PSCR = (0x0F); //Prescaler, Divid

Posted on February 18, 2017 at 20:13HelloI am using stm8al318a lqfp80 package with GPIO pins PI0 - PI3.The datasheet says 'all IOs mappable to interupt vectors' and the pin description has a check for ext. Interrupt.But when reading reference manual RM0031 and the interrupt controller chapter with the EXTI registers specified, there are no bits in the registers mapping PORT I to interrupt vectors. There is a note in chapter 12.6 saying 'Port G, H and I are available on medium+ and high-density devices only'My question is how can I map a GPIO on for example PI2 to an external interrupt?/Johan

Posted on February 01, 2017 at 09:53 What is the difference GPIO_ExternalPullUpConfig (GPIOB, GPIO_PIN_0, ENABLE) and GPIO_Init(GPIOB,GPIO_PIN_0,GPIO_MODE_IN_PU_NO_IT) in point of P-Buffer FET (FET at high side) and internal pull-up resistor. In an other saying: What does GPIO_ExternalPullUpConfig control? P-Buffer FET (FET at high side) or internal pull-up resistor?

Posted on February 17, 2017 at 03:59suddenly this problem generate.#comm-init-error:-chip-does-not-answer

Posted on January 06, 2017 at 05:39 I have a custom LCD that I am trying to drive with theSTM8L052C6. I have tested the LCD with 2 other MCUs and it works fine. However, when I try to drive it with the STM8, it is very dim and almost not visible. I probed the pins on another MCU that works and compared it with the STM8 trying to drive it. This image shows the STM8 vs a working MCU. For some reason, the STM8 will drive to the correct voltage briefly then will drop. I'm not sure what could be causing this. I have tried to change parameters in almost every LCD related register. Any ideas would be greatly appreciated. I've been stuck on this for quite some time. Here's my code to test the LCD:

Posted on February 15, 2017 at 11:09 In the STM8S_StdPeriph_Lib's stm8.h file there is a section: #if !defined HSE_Value #if defined (STM8S208) || defined (STM8S207) || defined (STM8S007) || defined (STM8AF52Ax) || \ defined (STM8AF62Ax) #define HSE_VALUE ((u32)24000000) /* Value of the External oscillator in Hz*/ #else #define HSE_VALUE ((u32)16000000) /* Value of the External oscillator in Hz*/ #endif /* STM8S208 || STM8S207 || STM8S007 || STM8AF62Ax || STM8AF52Ax */ #endif /* HSE_Value */�?�?�?�?�?�?�?�? The first line HSE_Value should be HSE_VALUE because in this way there are no way to override the clock frequency from compiler defines (C is case sensitive language). Please fix it in the next release! Thank you! #standard-peripheral-librar #bug #standard-peripheral

Posted on September 29, 2016 at 09:33Hi !Several years ago, the source of GDB was availabe as a download from ST (found in the forum, but not available anymore). I think nobody achieved to get the debugger running in Eclipse due to the missing MI interface yet. The STM8 is still a great product (and will ever be) but it is not possible to use GDB7 outside STVD. ST did not update the code since years.And ST does not provide the (old and former downloadable) source anymore. Why? I also did not get the code on request. We are buying ST72, STM8 and STM32 for more than 12 years now! I still have to use STVD for debugging with STLINK (I know Raisonnance of course).I will stick to COSMIC in any case. Presently I code in Eclipse with all available plugins (egit, Bugzilla etc.) with some workarounds (suppress the parser @-issue), auto compile on save and then debug with

Posted on December 14, 2016 at 00:30Hi All,I m using IRDA trough UART2 and can easily send data but i m not able to receive correct one.When data are received, the UART-> DR is not empty but not with the correct value !I try also with the ST example and the same append !Any idea ?Ben

Posted on February 14, 2017 at 12:23Hi all,I want to use STM8S003F3 to a project wich will use more than 8KB. I have some external SPI flash, with 2MB of data. STM8 is capable to handle and execute program from an exernal flash?Thaks!#stm8s-flash #stm8

Posted on February 13, 2017 at 11:30I am trying to develop to STM8AF5288 with STVD, but the debugging attempts failing with:error: swim prog error [42004]: memory write errorIn STVP I cannot select STM8AF5288, but it selects STM8AF528. Unfortunately the memory read also fails with:Error while reading address 0x8000Any hints would be deeply appreciated!#stvp #stvd #stm8af5288

Posted on May 19, 2015 at 00:24Hey guys, I've been told that when using COSMIC to program my STM8S003F3 I should have a code size of 8 kilobytes. Currently my code size is at 3846 and I am getting a text size overflow. Is the 8 kilobytes not the true code size or is there something that I am missing? Thank you very much! Charles #codesize #cosmic

Posted on February 02, 2017 at 12:01HiI am using a STM8AL318AT. What is the correct peripheral resisters include file to use? The stm8s.h includ file from the standard peripgeral library does not support any AL device. Can I use the stm8l15x.h file and uncomment the HD device?Regards/Johan

Posted on February 08, 2017 at 16:27STVP does not run the program after the firmware.And blocks access to the microcontroller to other programs until you will not close the program.I think this is very inconvenient.#stm8 #stvp

Posted on February 06, 2017 at 02:10I'm designing a product with an STM8L052C6 and a 1/2 duty lcd (2 com x 18 seg).  To make the layout and pin assignment easier, i'd like to use COM1 and COM3.  I have found the PM registor to turn off unused segment pins, but haven't found a way to use different com configurations.  Must I only use 1/2 bias COM0/1?Thanks,Scott#stm8l-lcd

Posted on February 03, 2017 at 10:57Hi,I use the ST Visual Programmer to flash a stm8S007C8 and this is working good, until the size of the .hex file is bigger than 155 kB. After this size the STVP shows an error/warning that it is out of range'FILE : line 3602: Address 0xXXXX is out of range and is ignored!' (see attached picture 001). The range (0xXXXX) starts from 0x8000 until 0x8BC7 (this depends on the size of the .hex file). If I flash the stm8 it's not starting because its overwrites/ignores the interrupt vector table. I have 6 kB left on the memory of the stm8 but i can't use it because of this problem.Is there a solution how to fix this?Thank you for your help.#st-visual-programmer #stm8s007 #stm8

Posted on January 31, 2017 at 10:23I'm working with STVD and COSMIC compiler and I'm just trying to store data in flash at a specific location. What I've done up to now:- Defining a new segement and section in STVD for the linker, specificed location for test issues should be 0xfff0 - 0xffff-> My linker file has now an additional segment and section:   # Segment test:   +seg .testsection -b 0xfff0 -m 0x10 -n .testsectionNow I'm trying to add a constant value to this section, in this way (as COSMIC recommends):#pragma section const {testsection} const unsigned char variable = 0xAA;const unsigned char variable2 = 0xBB;#pragma section const {}If I compile this everything works...but when I watch the end of the .s19 file (address 0xfff0 - 0xffff) everything is empty, where are my variables stored?Does anyone has a hint?

Posted on January 25, 2017 at 16:07I’m using the STM8L052r8 to measure temperatures on the ADC channels 24/25. I’m using a proven ADC routine but my expected counts aren’t coming in correct.It seems I've got a volt drop/ current flow across R1 on the input to the ADC pin.Could anyone tell me what internal resistance there is in the micro from the ADC input to ground please, and the kind of current I can expect to be flowing there.I have the ADC pins configured as input floating, with the Schmitt trigger disabled.The temperature probe is connected across THP1 and THM1. R2 is the drive resistor 9k09, R2 is a 1k in series with the ADC input.Really simple I bet but I'm pretty new to this.Thanks in advance, Richard

Posted on April 12, 2016 at 21:28Hello,i now managed to reada analog value from my temperature sensor and i am now wondering how i can convert that value (3643) to a temperature? I didn't see any kind of formula how the value is calculated with Vref (reference Voltage) and how i can get the input voltage on its own. Do you have any ideas how i can do this?Best regards #adc-vrefint #adc

Posted on January 25, 2017 at 13:27Hi.I am using the 511-STEVAL-IPE018V1 eval board along with STM8s micro for calculating power/electricity consumed by a 3W bulb connected to it.The eval kit has STPM10 energy metering IC, which can be accessed over SPI.So i am able to communicate with IC over SPI and i have these values that i read from the IC.How do i calculate the energy consumption from these values?There is some calculation mentioned in the datasheet but i am not able to understand it. I couldn't find any sample code for this.Can someone point me in right direction.!Thanks...!!  #stpm10 #energy-meter-ic