STM8 MCUs

In a function declared in RAM, I get the following warnings from the STM8 IAR compiler:Warning[Ta005]: Library call (?epilogue_w4) from within a __ramfunc function C:\myproject\src\myfiles.c 110 In the .map, I found that this function was part of vreg_util.o.As I want to deactivate the flash, calling the C lib while in RAM is problematic.The problemI don't understand what's epilogue_w4 and how to make sure I don't call it.

Since there was no "RST" or "NRST" pin on this chip.

For example the status of "STM8L15x/16x/05x/AL3Lx/AL31x standard peripheral library" STSW-STM8016 claims it is active. But the release notes seem to suggest that the last time someone took a look at it was at the end of 2014. That's not very active.Now, there are some problems with it, just as an example, if you want to use the AWU in a STM8L151C8 the SPL omits disabling the wakeup timer before trying to change its settings. In the code below I have added the blocks with (wilko) at the end.STM8 mcu's are nice things and no doubt people will continue to (want to) use them, because sometimes an 8-bitter is all you need. But if ST stops supporting them...void RTC_WakeUpClockConfig(RTC_WakeUpClock_TypeDef RTC_WakeUpClock) {   /* Check the parameters */ assert_param(IS_RTC_WAKEUP_CLOCK(RTC_WakeUpClock));   /* Disable the write protection for RTC registers */ RTC->WPR = 0xCA; RTC->WPR = 0x53;   // Disable the Wakeup tim

Hello everyone, I am using stm8l151, STVD, and cosmic compiler. I have multiple problems with STVD_STM8. Please help me as these are really confusing. I list some of them below:After I comment a line in the code, it is still active and the program still executes this line. There are some parts of the program where execution jumps over many lines and do not execute them. every time I want to debug, the STVD rebuilds the entire code automatically. there is a warning when I want to debug that says some of the source files are out of datethese problems are really confusing and I could not find any information about them anywhere on the internet and in forums. Your help is greatly appreciated. Best regards, Vouria Younesi

Hi, while the software are working, suddenly it will become stop, and reset pin is permanently forced low, it freaks me out!! Someone will help me, thank you so mutch

Hi,I need to modify data on a car's Lin bus line without generating errors on car side.I have two board with stm8 and can bus.my idea is to interrupt the car's lin bus line and connect my boards. but I don't know how to do it without affect the bus

Hello Everyone,I am using a STM8S105C6T6 in one of my application and I am facing problem while programming it.Software used: STVD version 4.3.12Compiler: Cosmic CXSTM8 Special Edition 4.5.1 (Free 1yr License version)I have build my application and when I click on ''start Debug'' in STVD, below error comesDebug Seesion:Starting debug session... -> Emulator reset (usb://usb)... done.Opening application C:\Users\Micro\Desktop\STM8\STM8S105\led\Debug\led.elf... -> failed to download application: error: swim prog error [42004]: memory write errorApplication closed.Debug session closed.

Hello,I am working with the CAN peripheral on the STM8AF5288.When I was using the standard peripheral library (delivered by STM) I found a fault in the code. It is about the STSW-STM8069 with version 2.3.1. (https://www.st.com/en/embedded-software/stsw-stm8069.html)The fault is in line 880 of the file stm8s_can.c.The assert_param will validate the uint8_t variable if it is <= to DLC_MAX.DLC_MAX is a value of 0x08. So the values 0, 1, 2, 3, 4, 5, 6, 7 and 8 are valid.The 8 must not be valid because it will return _Data[8] and that is out of range of the array __IO uint8_t _Data[8] = {0} from line 46.Hopefully this fault will be adjusted in a new version release.Kind regards,Birdo

Our customer need some help to develop their application using STM8S003F3.They are using Timer 1 as PWM generator at 125kHz but, does't have success to implement a overflow counter. They told us that the PWM pulse generator are working well. Did you guys have some example of how to implement this counter at the timer 1?They are using IAR to develop their application.They send to us some shots of their development:

I am using STM8L152R8 development board. I have configured push button interrupt on Pin no. PG6. i required both edges interrupt . but interrupt is occurring on falling edge only .Can you give any suggestion to this problem.?can you suggest me any logic to trigger the interrupt on both edges though it is only occurring on falling ?

I already download the documentation from this website: https://www.st.com/content/st_com/en/products/microcontrollers-microprocessors/stm8-8-bit-mcus/stm8l-series/stm8l-value-line/stm8l052c6.html#documentationBUT THEY ARE REALLY REALLY BAD THEY ARE NOT USER FRIENDLY

Hi,I am using stm8s105c6 for UART transmit receive program. I am using Eclipse with SDCC compiler.I am getting error as?ASlink-Warning-Undefined Global '_TIM3_CAP_COM_IRQHandler' referenced by module 'main'make: *** [main] Error 1Hope someone will guide me.Thanks in advance

Hi. I'm using an STM8L162 MCU. my application code size is more than 32KB . I am using SDCC 3.8.0 .To resolve memory issue I have switched from SDCC 3.5.0(as It uses 16 bit pointer) to SDCC 3.8.0 .Still facing the issue - Code is compiled successfully but not working.can someone suggest a way.Thanks.

Hello,I want to program the device using SWIM interface, The host is FPGA, but the device can't response successfully.When I reset the SWIM, the return value is wrong, and write SWIM_CSR could not successfully.I attach the wave form picture, please help to check what the problem.Thanks very much.​I can use ST-Link to program the device.

Hi Everyone,I have an issue with USART1 where my board designer mixed up the TX and RX pins going to an external module. Is there any way to swap them in software? I've had a look though the reference manual and seen the remapping feature but its not what I need and I know about the SWAP feature but it doesnt seem to be availble on my chip.I'm fairly sure it's not possible without bitbanging but just checking to be sure.Also If bitbanging is the only option, would it be possible to acheive at 115200? This is the default baud rate of the receiving module and I won't be able to change it until I can communicate with it.Thanks,Tiarnan

I know you can with the 32 bit nucleo boards but is it possible with the STM8L152R8T6 Nucleo-64 board? My feeling is no because the SWIM protocol requires VDD, SWIO,GND and RESET pins which i cant see anywhere in the ST-link section of the STM8L152R8T6 Nucleo-64 boards schematic. Hopefully someone can tell me I'm wrong though.Thanks

Hi,I am using user key and three more keys to do some work.Can you please guide me how to assign for the interrupt handler function for particular interrupt on a GPIO?e.g. I couldn't understand:What does the numbers like 8, 9, 10, 11 ect represents in the following code?INTERRUPT_HANDLER(EXTI0_IRQHandler, 8){ /* In order to detect unexpected events during development,   it is recommended to set a breakpoint on the following instruction. */ while (1);}/** * @brief External IT PIN1 Interrupt routine. *  On User button pressed: *  Check if button presse a long time (4-5 sec.) if yes --> Set Autotest *  Else update status_machine to pass to next measuremetn. *  Update the LCD bar graph * @par Parameters: * None

Hello,Currently I am programming STM8AF5288.With option byte OPT2.AFR5 the AIN3, AIN2, AIN1 and AIN0 can be remapped to the correct port.Do I need to check if this bit is set correctly before I change the ADC channel to one of those AINx?What will be measured if the bit is set wrong?

I have to generate check sum for Hex file that is having size approximately up to 52 K,I done the checksum generation settings in IAR EW STM8 as below:Fill pattern: 0xFF (can be any pattern)Start address: 0x0 (adjust to your application)End address: 0xFFFB / 0x17FFB(adjust to your application)Generate checksumChecksum size: 2 bytesAlgorithm: CRC16Complement: as isBit order: MSB firstInitial value: 0Now below is the linker setting:define region __checksum = [from 0x17FFE to 0x17FFF];place at start of __checksum { ro section .checksum };keep { section .checksum };In main.c   sum = fast_crc16(sum,(unsigned char *)&__checksum_begin, (unsigned int)&__checksum_end -(unsigne

I don't see any options in STVD or any tools provided by Cosmic to convert the output file to a raw binary. Does this toolchain provide anything or will I need to use an external tool?

I am using stm8s105c6 discovery board. I want to generate timer 1 interrupt and toggle led. But I am not able to generate timer interrupt.void delay_cycles(uint16_t cy){  do{    --cy;  }while(cy);} //void TIM1_UPD_OVF_TRG_BRK_IRQHandler(void) void TIM1_CAP_COM_IRQHandler(void){  GPIO_WriteHigh(GPIOB, GPIO_PIN_6);  if(flag == 0){    flag = 1;   // GPIO_WriteHigh(GPIOB, GPIO_PIN_4);  }  //TIM1_ClearITPendingBit(TIM1_IT_UPDATE);  TIM1_ClearITPendingBit(TIM1_IT_CC4);  TIM1_ARRPreloadConfig(ENABLE);}void main (void){  // CLK_DeInit();  CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1);  CLK_PeripheralClockCon

Hello Everyone,actually iam new these STM8 microcontrollers and i have been trying the basic peripherals, in that process i have started with UART and i tried to compile all the Standard SPL library files and having this error please help me-PFA-ThanksRaj

The stm8l price is going up quickly​So the developers are looking for another chip..​​When will the stm8l price stabilize as before?

Our company has developed a thermostat based on a microcontroller STM8L151K4T6. Many thermostats from the manufacturer were rejected. The analysis showed that the microcontroller does not correctly measure the voltage at the external terminals. The measured voltage is highly dependent on the temperature of the microcontroller. For example: + 20С - ADC_DR = 0x07A6, and +50C - ADC_DR = 0x0600 (at supply voltage 3.2В).A change in temperature has almost no effect on the measurement of the internal voltage reference.After replacing the microcontroller with a new one everything comes back to normal and the temperature does not affect the measurement. Init/* High speed internal clock prescaler: 1 */ CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1); /* Select HSE as system clock source */ CLK_SYSCLKSourceSwitchCmd(ENABLE); CLK_SYSCLKSourceConfig(CLK_SYSCLKSource_HSI);   CLK_LSEC

/** ****************************************************************************** * @file main.c * @brief Adjustable LED blinking speed using STM8S-DISCOVERY touch sensing key * Application example. * @author STMicroelectronics - MCD Application Team * @version V2.0.0 * @date 15-MAR-2011 ****************************************************************************** * * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR