STM8 MCUs

1. What happens if TIM2_ARR is 0xFFFF? Does overflow occur when timer counter counts past 0xFFFF?2. What happens to compare output after TIM2 overflows? For example, lets say that the TIM2_CCR1 = 0x7FFF so the output changes state when the counter counts past this value. So what happens to the output when the counter counts past 0xFFFF?

We are interfacing HSD to drive DC-Motor with STM8-MCU.We are expecting current sensing output at the Multi-sense pin of HSD.Selection of Channel is as per datasheet of VND7140AJTR.But, when Motor is ON, and Channel-0 is selected for CURRENT sense, we have observed 5V on Multi-sense pin of HSD.We observe voltage of around 2.5V, even if there is NO LOAD connected to the HSD output.Please see attached waveform.

Hello everybody,In my project which uses STM8L151G6 MCU, I need 6 interrupt inputs on both rising/falling edge. In particular those pins are PB0, PB1, PB2, PD1, PD2, PD3.Please note I'm using "port interrupt mode", i.e. EXTIB_G_IRQHandler and EXTID_H_IRQHandler are used.If all pins of the port (for example PB) are "floating" (internally pulled-up), then the first one which falls, it triggers EXTIB_G_IRQHandler interrupt as expected and everything it works.But, if 1 pin among PB0, PB1 and PB2 is already low, then interrupt is not triggered by the other pins even if EXTI->SR2 register has been "cleared" inside the interrupt handler.I have reduced the project to a very simple test code in order to reproduce the issue. Please find attached the project folder so you may test.TEST procedure:-set breakpoints in EXTIB_G_IRQHandler, EXTID_H_IRQHandler and EXTI0_IRQHandler...EXTI7_IRQHandler-s

ola alguem poderia me ajudar estou com dificuldades para instalar o st visual programer.ao tentar instalar ele da falha catastrófica,ja troquei hd,memoria,processador,instalei todos sistemas oparacionais win7,8,8.1,10 e 11 atualizei drivers e coloquei placa de video e mesmo assim da esse erro em ou note consegui instalar normal mas no pc não tive sucesso

#include "stm8l15x.h"#include "stm8l15x_gpio.h"#include "stm8l15x_exti.h"#include "stm8l15x_rtc.h"#include "stm8l15x_itc.h"#include "stm8l15x_clk.h"#define WAKEUP_GPIO_PORT    GPIOE#define WAKEUP_GPIO_PORT    GPIOE#define ICC_WAKEUP_GPIO_PIN   GPIO_Pin_6static void RTC_Config(void){ /* Configures the RTC */ CLK_RTCClockConfig(CLK_RTCCLKSource_LSE, CLK_RTCCLKDiv_1); CLK_PeripheralClockConfig(CLK_Peripheral_RTC, ENABLE);   RTC_WakeUpClockConfig(RTC_WakeUpClock_CK_SPRE_16bits); RTC_ITConfig(RTC_IT_WUT, ENABLE); /* Enable Interrupts*/  }void Delay(__IO uint32_t nCount){ for (; nCount != 0; nCount--);}void main(void){ GPIO_Init(GPIOC, GPIO_P

Hi STM Team,Which STM8 IC is used in STM8A Discovery? Is it STM8AF5288TAX or STM8AF5288TAY ?Could you also let us know the difference between both the versions?Thanks.

I wasn't sure where to post this request for the STNRG digital control IC example files so I'm reposting in STM8 after getting no responses in Power Management or from technical support in a weekThere is a link to download 5 sample files for the STLUX chip and 3 more for the STNRG digital controller eval boards. In the available zip file here https://www.st.com/en/development-tools/stsw-stluxsnip01.html on the ST website.the zip file has the same identical project file for Example_I, Example_II and Example_III.prj even though each project file had a different name. Also project 4 is not correct as it does not have an active ADC to control the SMED even though UM2068 describes and illustrates those examples. I've attached the UM2068 user manual that describes thes

As the result, the right side has very short run (it reaches 1023 in one sixth of travel). The same for Y axis, the same with another joystick. Both joysticks work properly with arduino - middle 520 (or so). Is there any (obvious) reason; how can I remedy this?Thanks!SOLVED:I connected +5V pin of the joystick to +3.3V pin of the MCU - works properly now!

I am trying to get I2C communication working between two STM8S003F3P6.From I2c master I am trying to initiate I2C start message using CR2 registers with below code#define I2C_CR2_START ((uint8_t)0x01) /*!< Start Generation */   .....   I2C->CR2 |= I2C_CR2_START;  But executing I2C->CR2 |= I2C_CR2_START; immediately restart and it keeps crashing at the same line.Can someone please help what is possible cause of it, and how to get over this issue

I am trying to run example code for i2c master and slave, provided in Stm standard peripheral library from https://www.st.com/en/embedded-software/stsw-stm8069.htmlBut the master keeps crahing at I2C_GenerateSTART API call.I2C_ITConfig enableInterrupts TxBuffer I2C_GenerateSTART �I2C_DeInit I2C_ITConfig enableInterrupts TxBuffer I2C_GenerateSTART �I2C_DeInit I2C_ITConfig enableInterrupts TxBuffer I2C_GenerateSTART �I2C_DeInit I2C_ITConfig enableInterrupts TxBuffer I2C_GenerateSTART �I2C_DeInit I2C_ITConfig enableInterrupts TxBuffer I2C_GenerateSTART �I2C_DeInit I2C_ITConfig enableInterrupts TxBuffer I2C_GenerateSTARTThe code I am trying is available at below locationshttps://gi

I am trying to get I2C working for STM8S003F3P6 with ESP8266. I tried I2C sample code available with standard periferal library https://www.st.com/en/embedded-software/stsw-stm8069.html . But for some reason I2c is not working. Now I just noticed the I2C pins PB4 and PB5 marked as open drain without any protection. So I wanted to check if I bricked these pins during my earlier testing sessions. So I written simple code to output on PB4,PB5 pins below, but I am not getting voltage on the PB4 and PB5 pin. I am getting correct output on PD4static inline void delay_ms(uint16_t ms) {   uint32_t i;   for (i = 0; i < ((F_CPU / 18000UL) * ms); i++)   __asm__("nop");   }     #define LED1_GPIO_PORT (GPIOB)   #define LED1_GPIO_PINS (GPIO_PIN_4 | GP

I am trying to run simple program to output HIGH on IO pin of microcontroller STM8S003F3P6. I am using PB5 pin to output High. I am using 3.3v power supply and expect GPIO to output 3.3v when I set it HIGH but surprisingly I am getting 5V instead, below is the circuit diagram  Can someone help how to get 3.3v instead of 5V on GPIO output for above processor, is there anything wrong with above circuit?

Can the TIM1 part of this tutorial be simplified as follows?https://embedded-lab.com/blog/continuing-stm8-microcontroller-expedition/6/Remove everything related to the the interrupt, because TIM1_GetCapture2() can be called at any time from main(). It will always contain the last capture duty cycle.Reduce TIM1_setup(void) to:TIM1_DeInit();TIM1_TimeBaseInit(2000, TIM1_COUNTERMODE_UP, 55535, 1);TIM1_PWMIConfig(TIM1_CHANNEL_1, TIM1_ICPOLARITY_RISING, TIM1_ICSELECTION_DIRECTTI, .... TIM1_ICPSC_DIV1, 0);    TIM1_SelectInputTrigger(TIM1_TS_TI1FP1);TIM1_SelectSlaveMode(TIM1_SLAVEMODE_RESET);TIM1_CCxCmd(T

I am following this tutorial and trying to get a complete understanding of the code:https://embedded-lab.com/blog/continuing-stm8-microcontroller-expedition/6/I have a few questions regarding the TIM2_setup(void) function:1 Why is channel 1 and channel 2 used in identical fashion like this? Might this be to use the two output pins on the MCU in parallel for higher current capacity?2 Isn't this line redundant:"TIM2_SetCompare1(100);"when the "duty cycle count" was already set to 1000 in this line? TIM2_OC1Init(TIM2_OCMODE_PWM2, TIM2_OUTPUTSTATE_ENABLE, 1000, TIM2_OCPOLARITY_LOW);3 Are these two lines effectively the same? TIM2_OC1Init(TIM2_OCMODE_PWM2, TIM2_OUTPUTSTAT

My current design has +5V connected to an optocoupler output pin, the other optocoupler pin is connected to ground through a 25k resistor. (External pull down) The connection point between the optocoupler and the resistor is connected to the MCU pin which is configured as a floating input.Can I replace this with the following circuit?MCU pin connected to optocoupler pin. The other optocoupler pin connected directly to ground. The MCU pin configured as input with internal pull up.

GreetingsI'm using an STM8S003F3 TSSOP20 (my first STMicro) for a simple project with one input (low frequency PWM) and one output (high frequency PWM). I seek to keep it as simple as possible. Since I'm not familiar with STMicro MCU's, I would like to confirm the wiring of this:100nF between NRST and VSS1uF between VCAP and VSS1uF and 100nF in parallell between VDD and VSS+5V to VDD0V to VSSVDD, VSS, NRST and SWIM connected to ICSP plug.PWM input on PD2PWM output on PD3All other pins connected together, with one configured as output, driven to 0VThanks in advance for any helpful advice!

Hi ST team,I referred the Application notes from the ST's for RTC temperature compensation Using STM8AL3189 MCU , Which has both positive and negative ppm compensation using CALM and CALPFrom the APP notes, ACC(ppm) = crystal deviation + k * (T -T0)^2;How to find the crystal deviations room temperature. i followed as per app notes 32768 Hz prescalar value , CALOUT is 512Hz when measured using the logic analyzer i get 512.030Hz((512/512.030) - 1) * 1000000 = > 0.99994140968302638517274378454387 - 1 * 1000000 -5.8590316973614827256215456125618e-5 * 1000000-58.5 PPM it is correct ? any suggestion helps to move forward Thanks in advanceRegards,Anand

Arduino sketch, cosmic compiler, USB STLink programmer

#include "stm8l15x.h"#include "stm8l15x_gpio.h"#include "stm8l15x_itc.h"#include "stm8l15x_exti.h"#include "stm8l15x_clk.h"#include "stm8l15x_rtc.h"#include "stm8l15x_tim2.h"#include "stm8l15x_tim1.h"#include "stm8l15x_tim3.h"#include "stm8l15x_tim4.h"#include "stm8l15x_adc.h"#include "stm8l15x_pwr.h"// void Halt_init();// void GPIO_LowPower_Config(void);// void Delay(__IO uint32_t nCount) { /* Decrement nCount value */   while (nCount != 0)   {     nCount--;   } } void main(){  // Halt_Init();        TIM1_Cmd(DISABLE);        TIM2_CtrlPWMOutputs(DISABLE);        TIM2_Cmd(DISABLE);        TIM3_Cmd(DISABLE);   

In documentation for timers on S103/S105/S003 it says that bit URS or register TIMx_CR1 should allow that CNTR=x or EGR |= UG update the timer counter WITHOUT setting the UIF flag: TIM2:URS: Update request source0: When enabled by the UDIS bit, the UIF bit is set and an update interrupt request is sent when oneof the following events occurs:–Registers are updated (counter overflow/underflow)–UG bit is set by software–Update event is generated through the clock/trigger controller1: When enabled by the UDIS bit, the UIF bit is set and an update interrupt request is sent only whenregisters are updated (counter overflow/underflow).TIM4:URS: Update request source0: When enabled, an update interrupt request is sent as soon as registers are updated (counteroverflow).1: When enabled, an update interrupt request is sent only when the counter reaches theo

I'm trying to "activate" TIM2 or TIM4 on a STM8S105C6 (discovery board) part without success for more than 4 days now... I'm getting sooo frustrated.I tried all examples I could find and not a single one works.Ended up with a basic, dummy test to show the issue. Just enable ti timer and "watch" the counter register - it is NOT incrementing, consequently nothing works.It's the same with TIM2.But TIM1 works normally. TIM2 & TIM4 cout registers just won't update/change.Any idea what could be possibly wrong?I tried with 5 different boards (always the same model, STM8S Discovery with S105C6 onboard)void main(void) { int cnt;   TIM4_IER = 0; // 0x01; TIM4_EGR = 0x01; TIM4_PSCR = 0x01; TIM4_ARR = 0x10; TIM4_CNTR = 0xff; TIM4_CR1 = 0x01;   while (1) { for (cnt=0;cnt<1000;cnt++) ; printf("tim4: %u", TIM4_CNTR); // always prints tim4: 0 for (cnt=0;cnt<333;cnt++) ;

I am using this code:void main(){CLK_RTCClockConfig(CLK_RTCCLKSource_LSI, CLK_RTCCLKDiv_1);CLK_PeripheralClockConfig(CLK_Peripheral_RTC, ENABLE);RTC_WakeUpClockConfig(RTC_WakeUpClock_CK_SPRE_16bits);RTC_ITConfig(RTC_IT_WUT, ENABLE); <=======================(gets stuck at this line)enableInterrupts();RTC_SetWakeUpCounter(5);RTC_WakeUpCmd(ENABLE);GPIO_Init(GPIOE, GPIO_Pin_7, GPIO_Mode_Out_PP_Low_Fast);GPIO_Init(GPIOC, GPIO_Pin_7, GPIO_Mode_Out_PP_Low_Fast);GPIO_SetBits(GPIOC, GPIO_Pin_7);Delay(5000);while(1){ halt();}GPIO_SetBits(GPIOE, GPIO_Pin_7);Delay(5000);}

Hi,I need clarification of errata, "Interrupt service routine (ISR) executed with priority of main process".I don't understand in which cases this limitation can occur.I don't understand why the workaround used for STM8S (put a SIM instruction at the beginning of the ISR) can't be used for STM8L family. STM8L152 Errata sheet says: workaround none.Also need clarification of STM8L errata, "Incorrect code execution when WFE execution is interrupted by ISR or event", case 2.I don't understand in which cases this limitation can occur.The workaround is SIM, WFE, RIM. And says: "It is recommended to avoid any interrupts before WFE mode is entered". But WFE instruction doesn't change interrupt mask. So if before, interrupts are disable, they continue disable while WFE is executed. This means that meanwhile no interrupt is serviced. They are lost if WFE execution takes some time or the execution is dela

Hello,I had to copy a project that was built on another system in ST visual develop to my PC. I am able to open this workspace (.stw) and project (.stp) in my PC and build successfully. But, when I try to use the "Go to definition" feature or search for a word in the files, it is giving the following error in the tools section:gcc: 2: No such file or directoryWhat could be the problem? How do I resolve it?Software version: ST Visual develop 4.3.12