STM8 MCUs

I get a swim error [30006] when trying to connect to an unmodified STM-S08-DISCO board (configured for S001J3). I viewed the SWIM signal at pin 1 of the socket and the voltage levels do not look valid. It is powered by USB and the STLINK LED does flash when trying to connect. The shunt is installed on JP1 and there is 3.3V on pin 4 of the socket.Attached are the error message and a scope shot of the SWIM signal.

How can I solve this problem ?

The CANH and CANL signals are reversed on the DB9 connectors. The schematic shows CANH from the TJA1043 driver chip going to pin 7 of the DB9, and CANL going to pin 2. This is the standard for use of DB9 connector on many CAN devices. In fact, the signals are reversed due to board layout. It is very obvious when you trace the signals on the board. Very unfortunate when you are trying to use this board to evaluate CAN with STM8AF5288 MCU!!

please provide suggestion and example of multi channel adc reading on interrupt

Posted on August 02, 2016 at 13:24I have a weird condition in which the STM8S003 does not read the entire packet I'm sending using a PC serial port. For example I have sent 256 bytes using a PC software but at the end I have only read 214 bytes instead of 256 bytes in the controller. (RX ISR happened 214 times instead of 256 times)What could be possibly wrong? It's said a read to the Data Register is enough to clear the flags.I'm going crazy here because it's not supposed to be this hard getting a simple RX interrupt to work.  #stm8s-uart

the function where taken from st spl main() ;   TIM1_DeInit();  GPIO_DeInit(GPIOC);  GPIO_Init(GPIOC, GPIO_PIN_1, GPIO_MODE_OUT_PP_HIGH_FAST);  //TIM1_TimeBaseInit(0, TIM1_COUNTERMODE_UP, 4095, 0);  TIM1->CCER1 = 0x77 ;  TIM1->CCER2 = 0x37 ;  TIM1->CCMR1 = 0x70 ;   TIM1->CCMR2 = 0x70 ;   TIM1->CCMR3 = 0x70 ;  TIM1->CCMR4 = 0x70 ;  TIM1->RCR  = 0x00 ;  TIM1->PSCRH = 0x00 ;   TIM1->PSCRL = 0x00 ;   TIM1->ARRH  = 0x0F ;   TIM1->ARRL  = 0x05 ;  TIM1->CCR1H = 0x07 ;   TIM1->CCR1L = 0xFF ;   TIM1->CCR2H = 0x0

We can get the information that the CPUDIV can be used to divide fMATESR for CPU. And the divide ration can up to 128：1. I wonder that when you configure CPUDIV to 128:1, can CPU works normally when access peripherals such as I2C. Or CPUDIV is just for some special scenario?

#include "stm8s.h"#define I2C_PORT   (GPIOB)#define SDA_pin   (GPIO_PIN_5)#define SCL_pin   (GPIO_PIN_4)#define SLAVE_ADDRESS 0x60#define I2C_OWN_ADDRESS 0x00static void CLK_Config(void);void I2C_init(void);void I2C_Write(uint8_t I2C_Slave_Address,uint8_t idata);void main(void){/*Configure the HSE Clock*/ CLK_Config();   GPIO_Init(I2C_PORT,((GPIO_Pin_TypeDef)(SCL_pin | SDA_pin)),GPIO_MODE_OUT_PP_HIGH_FAST);   /*I2C Init*/ I2C_init();     I2C_Write(SLAVE_ADDRESS,0xA1);  }/* for clock configuration */static void CLK_Config(void){  /*Default Initialization*/  CLK_DeInit();      &n

Hi,Does ST have some code samples to use PWM on STM8L151 ??If so, where can I find it?Thanks,Itai

Hi. I am writing very time sensitive code on the STM8 mostly using assembly. However, I have noticed that sometimes adding one cycle of delay at one point in the code changing the timing of the whole code. I will explain in more detail to clarify. I have an interrupt which fires based on the a GPIO. I start reading the inputs. My code works, data read is good. I respond, but the timing is slightly off. So I add in a couple of nop cycles to fix it. The read is now broken. Keep in mind this is all a single sequential file of assembly to handle the interrupt. The processor is always in the WFI state when the interrupt fires. But somehow adding a couple of nops somewhere in the code causes everything to break (in terms of timing). I sure there is some explanation for this, but I have yet to find anything in any of the documentation. Any insight would be greatly appreciated.Thank you,Chris

I have initialized TIM1 timer with:TIM1_DeInit();TIM1_TimeBaseInit(16, TIM1_COUNTERMODE_UP, 1000, 0);TIM1_SetCounter(0);TIM1_ITConfig(TIM1_IT_UPDATE, ENABLE);TIM1_Cmd(ENABLE);But calls to TIM1_GetCounter(); return the value 2. I can see the counter interrupt running and can increment a variable which provides an accurate enough timer, but I want to use the value of the counter, why does it always return 2? What am I missing?

Hi. This is some open feedback on the use of the STM8 tools for a pending project. We are 35 year old OEM design house and about to deploy the STM8S001J3 onto a consumer space product. The assembled PCBs have arrived and now the code development was initiated on Friday.1) The tools are horrible along with the documentation. Faced a very miserable experience and has taken an estimated 4-5 hours to get a working blinky for the low cost 8 pin SO8 breakout board from ST.2) Is there any QC on the s/w left at ST? Any staff still working to improve the out of the box experience?Try the following with a newbie:Take a fresh kit and using IAR, try to get the LED blinky working from the supplied source code. Note the time it takes to get this all working.3) We have chased countless articles on the STM8S, read assorted 3rd party website tutorials which btw told us about a bug in the ST tools that allowed us to have a working

when i am trying to compile ST Visual develop 4.3.12 with cosmic compiler 4.4.9.0.i am getting this Connection error (usb://usb) [30100]: can't load library.can anyone please help me to solve this problem.

I downloaded and installed the COSMIC stm8 free compiler (http://cosmicsoftware.com/download_stm8_free.php). I requested and received a license. I copied the license file to the appropriate folder.However, the compiler does not start. It does not start from ST Visual Develop.I tried to run it on the command line, from the folder in which it is located (D:\Program Files\COSMIC\FSE_Compilers\CXSTM8).I see error: "D:\Program Files\COSMIC\FSE_Compilers\CXSTM8\cxstm8.exe not a valid Win32 application"I use Windows XP SP3.I tried 3 times reinstall compiler. And i got same error.

OS:Windows 7STDV 4.3.12 , with STM8 nucleo64 stm8s eval boardThe ST DV software opens fine, and I can compile and transmit a program to the eval board.However when I try to simply "read" or open to view any file in the work space like main.c or a header file, the program freezes and displays (not responding).This seems to be related to certain workspaces, but the one that it crashes on 100% are the ones provided as examples for the STM8 Nucelo-64 STM8S eval boards !!! Has anyone seen this before? Thanks for any guidance.

Dear,according to the spec. of STM8L151, Recommended load capacitance C=CL1=CL2= 2*CLOAD of crystal, so, if the Cload is 20pF, we should use 40pF for CL1 and CL2?please help to advise if it's ok and if have any other issues?b/rzhang

I am interested in STM8S 103F 32 PIN micro from ST. I have procured RLink debugger /programmer from Raisonance .What are latest development tools which are required to work on above micro with RLink. Is there any tutorial for getting started with this Micro from ST.

 I am developing an application on STM8S003 using Standard Peripheral Library (V2.3.1). I noticed that TIM2_ClearFlag(...) function does not clear the overcapture flags (CCxOF) in the TIM2_SR2 register. When I examined the source code of the function I saw the line below:TIM2->SR2 = (uint8_t)(~((uint8_t)((uint8_t)TIM2_FLAG >> 8)));I think there is a downcasting which wipes out the flag information. My fix is;TIM2->SR2 = (uint8_t)(~((uint8_t)(TIM2_FLAG >> 8))); Am I right or missing something ? Is there a page like known issues about this library?Thank you in advance

**To confirm connections, I did SWIM on STM8SDiscoveryKit and STM8S103FP6 breakout board & it worked well.My board connections are as follows (STM8S Development Kit's Programmer ---> STM8S003F3): VDD -> pin 9 SWIM -> pin 18 GND -> pin 7 (GND)NRST -> pin 4 NOTE: I've connected 1uF tantalum polarized capacitors across pin 7 and pin 8(Vss & Vcap)0.1uf across pin 4 and pin 7 (NRST & Vss)1uf tantalum polarized capacitors across pin 7 and pin 9 (Vss & Vdd)** Attachments below shows the error i get while trying SWIM interface on STVD & STVP.

Hi,I am working on a project, turning on an LED in push-pull mode when a switch in pull-up mode is pressed. The LED only lights up once. I am using IAR and C.Everything works perfectly fine except that, sometimes when the LED is connected to power with the switch NOT pressed, the LED would flash.Our group suspects it to be a problem of the circuit because it's a complicated circuit and we're only using some of its functions. But because it's my first time to use STM8S, I am not so confident that my program is flawless.Could anyone helps me check if there's any problem with the program? Thank you very much!

Hello,for a battery application, I have some question1) can I have the output pin in stable condition or halt mode puts the output in floating mode?2) I read the current run mode is: 150uA/Mhz + 215uA. At internal 38kHz clock, the total is 220,7uA, not low power!! is it right?

I'm using the Cosmic Software 4.4.9.0 in ST Visual Develop 4.3.12  I can't compile it.I try to install again but it showing same error.i tried to set root path correct like this C:\Program Files\COSMIC\FSE_compilers\CXSTM8.Can any one help me to solve this error.My error is:---------- Project test - STM8 Cosmic - Configuration Debug -------------Compiling uartcom\uartcom.c...cxstm8 +modsl0 +debug -pxp +compact -pp -l -icalibration -ichargercom -iinternal_eeprom -iuartcom -imppt -ispi -i..\pcu1\adc -i"c:\program files\cosmic\cxstm8 -icalibration -ichargercom -iinternal_eeprom -iuartcom -imppt -ispi -i..\pcu1\adc _32k\hstm8" -i"c:\program files\stmicroelectronics\st_toolset\include" -itimer4 -itimer3 -itimer2 -itimer1 -ilcd_lampex -iisr -igpio -iexti -idma -idelay -iclock -ichangeover -iadc -i"C:\ProgramFiles\COSMIC\FSE_Compilers\CXSTM8\Hstm8" -clDebug\ -coDebug\ uartcom\uartc

How to calculate the square root in the STVD?Is it necessary to use a library? Where can I get this library?

----------- Project ild004v2 - STM8 Cosmic - Configuration Debug -------------Compiling watchdog.c...cxstm8 +modsl0 +debug -pxp -no -pp -l -i"x:\bu_thyristor_triac_rectifier\04_ase_thyristor_triac\promotion tools\digital dimmer with viper_steval-ild004v2\05_software\steval-ild004v2 software v1.0\steval-ild004v2 software v1.0\ild004v2" -i"C:\Program Files\COSMIC\FSE_Compilers\CXSTM8\Hstm8" -clDebug\ -coDebug\ watchdog.cwatchdog.c:Compiling timer_config.c...cxstm8 +modsl0 +debug -pxp -no -pp -l -i"x:\bu_thyristor_triac_rectifier\04_ase_thyristor_triac\promotion tools\digital dimmer with viper_steval-ild004v2\05_software\steval-ild004v2 software v1.0\steval-ild004v2 software v1.0\ild004v2" -i"C:\Program Files\COSMIC\FSE_Compilers\CXSTM8\Hstm8" -clDebug\ -coDebug\ timer_config.ctimer_config.c:Compiling stm8_interrupt_vector.c...cxstm8 +modsl0 +debug -pxp -no -pp -l -i"x:\bu_thyristor_triac_rectifier\0

Hi, I'm evaluating the STM8 UART emulation library (STSW-STM8051). I'm using the STM8SVLDISCOVERY board. Instead of the TIM3 I'm using the TIM2 timer since the TIM3 is not available on the STM8S003K3: I configured the project to communicate at a baudrate of 19200bps 8N1. The library uses both UPDATE and CAPTURE/COMPARE interrupts from the same timer. It seems that if the two interrupt flags are set in the same time only one ISR is serviced; it seems that only one interrupt from the same peripheral is serviced while the second one is not kept in queue. I have tried also with different priorities without success. The problem seems to arise if the second interrupt flag is set while the first ISR is evaluating the TIMx->SR1 register and clearing the flag (therefore if the compare register value is near the autoreload value).In the errata this issue is not described. Can you please tell me what can I do to solve the problem? This problem must be solved to allow for full-duplex