STM8 MCUs

The input voltage drops to between 0V and VIT- （Brown-out reset threshold） , such as 2V，and then rises higher than VIT+ （Power-on reset threshold）again. Can STM8 work normally in this case?

STVP v3.4.1. CONFIGURATION:Hardware: STLINK-V3SETProgramming mode: SWIMDevice name: STM8L051x3Port: USBJP4 and JP6 (SWIM ON) jumpers are installed. All 4 pins of CN4 are connected to the target. The target is the bare chip on a dip adapter, plugged into a breadboard, with 3.0V and GND coming from a bench supply. The ST-Link works with various STM32 targets no problem. Windows 10 home 1909. AMD Ryzen 5 2500U 2GHz. 12G RAM.Attempts to read give the following error dialog (tried cycling target power as suggested, no help):Cannot communicate with the device ! Check the SWIM cable connection and check all the needed pin connections on the SWIM connector. If the application code uses Swim Disable and Reset pin as Output or has disabled SWIM Clock Divider: Try Now to SWITCH OFF and ON the application Power Supply while NRST Reset pin is forced low.I would like to use the STLINK-V3SET fo

Hi. I'm using an STM8 MCU. I'd like to reliably write to and read from a block of EEPROM/FLASH memory (about 1k) that will never be overwritten either by the MCU or by programming/debugging via SWIM, but can be read and written from code. I'm writing RFID tag codes that should always be preserved on power off and then reliably read and written during operation. I was following the FLASH peripheral example (FLASH_ByteReadWriteOperation) literally (starting at 0x9000), which seemed to work. But then I was forced to change from disabling compiler optimizations to minimizing code size in order to avoid a "segment .text size overflow" compiler error at which point that area started getting overwritten.If I'm not planning to rearrange the basic memory structure of the device manually beyond changing optimizations (or alternatively I can do so if advised, for example using MASS), can someone suggest how (or where) in memory to do this safely? Thanks.

I develop stm8 using cosmic compiler and v.2.3.1 standard libary.I think there is a problem with the definition of CAN_ReceiveAll.In this function I can get an address of _Data variable.But, I can not get the address in Caller side.My thoughts should be defined as:---Caller Side---uint8_t *pData;CAN_ReceiveAll(&id, &pData);--CAN_ReceiveAll Definition-- (Bold is modified)void CAN_ReceiveAll(uint32_t* pid, uint8_t** pdata){ CAN_Page_TypeDef can_page = CAN_GetSelectedPage(); uint32_t temp1 = 0, temp2 = 0, temp3 = 0;   /* select Fifo page*/ CAN->PSR = CAN_Page_RxFifo;   /* Get the Id */ _IDE = (uint8_t)(CAN->Page.RxFIFO.MIDR1 & CAN_Id_Extended); if (_IDE != CAN_Id_Standard) {  temp1 = ((uint32_t)((uint32_t)CAN->Page.RxFIFO.MI

Hello,I am newbie in ST MCU.Before ST MCU i use Microchip MCU lot. I am mostely using in assebley language code because i wote code for SMPS.In microchip there is good IDE and they provide a lot example with comments to learn easy.While i get very difficult to learn ST MCU.when I use STVD is always get crashes. i dont know why. And also face lack of example to get start in ST MCU. I want to learn ST MCU but stuck.Kindly Give me suggestion to Overcome and to learn ST MCU.Thanks and Regards munna kumar

 Timer 1 work's well without any problem.the code works properly with stm8s105k4 without any problem.

There do not seem to be definitions for Port C to be used as such.  //EXTI_SelectPort(EXTI_Port_C);  //EXTI_SetHalfPortSelection(EXTI_HalfPort_C_LSB, ENABLE);  //EXTI_SetPortSensitivity(EXTI_Port_C, EXTI_Trigger_Falling);Is there any way to trigger a falling interrupt for input on Port C Pin 0 (pin 18 on the tssop 20 package)?

I have implemented the same methodology as explained in the below post:http://embedded-lab.com/blog/continuing-stm8-microcontroller-expedition/12/I am trying to receive data that is 6 bytes long on the Rx pin using interrupts. When calling ReceiveData8() I get the correct first byte. I then clear the UART2_FLAG_RXNE flag and the UART2_IT_RXNE ITPendingBit. When I check RXNE again the flag is not set so therefore I cannot access the rest of the data.Is it not valid to simply call ReceiveData8() (with a clear to the flags) again in a loop until all 6 Bytes have been saved in an index of an array?Is there a way to implement this using ST Std_Periph?I am using the STM8S-Discovery (STM8S105C6T6) and the bas

Hello,I'm trying to program and STM8L050J3 from another MCU through ICP programming on the SWIM interface. Section 5.6.1 of PM0051 presents a sequence where it is required to apply a reset and release it after the SWIM_CSR register hase been configured. However, the STM8 device I'm using has no RESET line available. And when I try to program the SWIM_CSR with 0xA0 (without applying the reset), I always readback 0x40.What is the ICP sequence for this kind of devices? Could it be that missing to apply reset is not allowing me to write the proper value on SWIM_CSR?Thanks

Hello Everyone,I am to test a device which uses the STM8S207RB as the controller. The controller's pin 25 and 26 are used for I2C communication. But in order to use it for the SDA and SCL signals, I need to remap its function by changing the AFR6 bit of the AFR register(OPT1) to 1 (and also the complementary register NOPT1 to 0). I went through many documentations and finally found document UM0560 which gives instruction on how to program the memory via the embedded Bootloader (note that I only have access to the controller via the UART interface).I followed the instruction provided and changed the AFR6 (AFR to 0x40 for OPT1 and 0xBF to NOPT1) using the following command:0x31 CE 00 00 48 03 4B 01 40 BF FE (where 00 00 48 03 is the AFR address, 40 is the value to write, 31 CE is the write command) After that I issue the read command (11 EE 00 00 48 03 4B 02 FD) to verify that the AFR is indeed changed.I reset the device and noti

Using STLINK-V3SET. Please Note in circuit STM8S105K6T6C  embedded board has these pins GND, RX, TX , VCC. Many thanks

1. I am using Stm8s003f3.In it a slave SPI device is connected, which only inputs data, it dont output any data so MOSI is only used.2. My question is can I use remianing MISO pin as GPIO? since MOSI is used after configuring SPI, will it automatcially configure MISO also?Or i can use it as independent GPIO?

Hello Respective,I am using STM8l052C6 device for my product, I want to design my own bootloader for the same.Is it possible, as I didn't find any guideline for the same in relavent documents.

Hi. I'm using an STMTL52F4 20-pin MCU that I've programmed to immediately enter HALT mode on startup with the halt() command. Although the documentation says that the chip consumes only 0.4uA in this state, when I put a multimeter in series with the chip's VDD pin, I'm seeing about 20 times that current going in. I know that the chip consumes more current while debugging with STVD via the ST-LINK/V2 / SWIM interface, so I'm testing immediately after a power-on reset (with the ST-LINK still attached). Am I missing something? The thing is, I observed the chip consuming about 1uA earlier, but I can't figure out what I'm doing differently now. Does the chip consume more power with the ST-LINK attached? Thanks.

void main(void) { uint16_t tmpcnt = 0; uint8_t tmpcntrl, tmpcntrh;   setup_pins();   CLK_PeripheralClockConfig(CLK_Peripheral_TIM2, ENABLE); TIM2->PSCR = TIM2_Prescaler_1; TIM2->ARRH = 0; TIM2->ARRL = 1; TIM2->CNTRH = 0; TIM2->CNTRL = 1;   TIM2->SR1 &= ~TIM_SR1_UIF; TIM2->CR1 |= TIM_CR1_CEN;   while (1) { tmpcntrh = TIM2->CNTRH; tmpcntrl = TIM2->CNTRL; tmpcnt = (uint16_t)(tmpcntrl); tmpcnt |= (uint16_t)((uint16_t)tmpcntrh << 8);   if (tmpcnt % 1000 > 500) { leds_on(); } else { leds_off(); } } TIM2->CR1 &= ~TIM_CR1_CEN; CLK_PeripheralClockConfig(CLK_Peripheral_TIM2, DISABLE); }  

Hi.Regarding I2C Bus busy problem. I am using alternative pins (PB4 and PB5), as I have the small chip with fewer pins.Option bits are set, and verified.However even at power up the BUSY bit is set. It is set through configuration of the I2C peripheral.It is cleared when I active SWRST bit, but as soon as I clear it, BUSY is set again.Is there a problem using alternative pins (or do I need to do something further than setting the option bit)?

#include <stm8l15x.h> #include <stm8l15x_pwr.h>   void main(void) { GPIO_Init(GPIOA, GPIO_Pin_All, GPIO_Mode_Out_PP_Low_Fast); GPIO_Init(GPIOB, GPIO_Pin_All, GPIO_Mode_Out_PP_Low_Fast); GPIO_Init(GPIOC, GPIO_Pin_All, GPIO_Mode_Out_PP_Low_Fast); GPIO_Init(GPIOD, GPIO_Pin_All, GPIO_Mode_Out_PP_Low_Fast); PWR_UltraLowPowerCmd(ENABLE); halt();   while(1); }I'm using the STM8L151G4. I wrote the simplest program that only performs the Halt function. The current draw I'm measuring is 9.7 mA!! It's definitely not going into the ultra low power halt mode. What could cause the Halt function to not work?

Hi. I'm using STVD v 4.3.12 with an STMTL52F4 MCU. Debug building works just fine. However, when I switch over to a Release build (changing nothing else), it fails to compile, reporting that it can't open an include file it was able to find before. Can anyone tell me why that is the case? The include path showing under both Debug and Release versions under Settings->General is showing as Hstm8. Thanks.

We are developing a product that uses segment_LCD using stm8l052r8.There was no problem when developing with com4+seg28There was a problem when developing with com8+seg24.When you turn on the entire screen, all the text on the screen comes out well.If i code partially to turn on what i wantIt doesn't come out exactly, and the text next to it is blurryI can't express it correctlyIs there any other way to do it with com8?

Hi,i use a stm8s003 and SPL for programming. I am not a profi programmer.My goal is measure an Analog signal with stm8s and reading this with Python command from a Raspberry Pi.Ok, i use STM example Program I2c slave. I can read some registers from stm8s with a little python code. But i dont now, which registers, that i read.Has i2c a Data register?Or can some body give me a little example like this: Read the value of int x over i2c busBelow is the codesI2C slave code:int x=12; //i want read this value!!!!!void main(void){ /* system_clock / 1 */ CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1); I2C_DeInit(); /* Initialize I2C peripheral */#ifdef I2C_slave_7Bits_Address I2C_Init(100000, 0x30, I2C_DUTYCYCLE_2, I2C_ACK_CURR, I2C_ADDMODE_7BIT, 16);      #else I2C_Init(100000, SLAVE_ADDRESS, I2

if yes then please share technical article/code/project/link etc.

Being new to STM8 development, I'm having a problem getting the external interrupt to work. There are many bits and pieces of external interrupt code I've found on the internet, but I haven't found a definitive piece of code that works as expected. Here are the relevant details of my setup:-STM8S105K-STVD with Cosmic C-External Interrupt (irq4) on PORTB PB2 and executes via a push button switch to GND.-Standard Peripheral Library - using *_.itc.c, *_interrupt_vector.c, *_.exti.c, and all other relevant source and header files.Here's my problem:While emulating with ST-LINK V2, when the push button is pressed the code vectors to the line extern @far @interrupt void EXTI1_PORTB_IRQHandler(void); as shown in the interrupt vector file below.stm8_interrupt_vector.c/*   BASIC INTERRUPT VECTOR TABLE FOR STM8 devices *   Copyrigh

12k flash memory reserved for Bootloader and rest (52K) want reserve for application. Getting section placement failed error.linker file....define memory with size = 16M;define region TinyData = [from 0x00 to 0xFF];define region NearData = [from 0x0000 to 0x17FF];define region Eeprom = [from 0x4000 to 0x47FF];define region BootROM = [from 0x6000 to 0x67FF];//0xAE40 -size of boot code + 0x400 (param) = app start addr B240(size 0xCDBF)define region NearFuncCode = mem:[from 0xB240 size 0x4DBF];define region FarFuncCode = mem:[from 0xB240 size 0x4DBF] | mem:[from 0x10000 size 0x7FFF];                     define region HugeFuncCode = mem:[from 0xB240 size 0xCDBF];

When i choose the option of "ST Assembler linker" in C Compiler it compiles the code but the code is not burn in MCU successfully. And when STM8 cosmic is selected there is an error while compiling " The command: "cxstm8 +mods0 +debug -pxp -no -pp -l -iinc -i"C:\Program Files\COSMIC\FSE_Compilers\CXSTM8\Hstm8" -clDebug\ -coDebug\ main.c" has failed, the returned value is: 1exit code=1.".License problem is "flexnet license finder" which asks for the license. Which i do not have?Kindly, revert back

Hello. I've built a sensor similar to that pictured in 'Figure 3. H sensor (single layer)' from the AN4313 Projected sensor design document. I'm using it in conjunction with the Touch Driver library as part of the STM8TL5x_STMTouch_Lib_V2.1.0 touch library.When I touch the sensor, I reliably get TSL_STATEMASK_DETECT states (normally preceded by DEB_DETECT states). When I stop touching the sensor after a moment, I reliably get RELEASE states (usually preceded by a few DEB_RELEASE_DETECT states). But NOT when the touch is long (greater than a second or so). In that case, I always get intervening CALIBRATION states that precede subsequent RELEASE states and those RELEASE states are often transmitted while the sensor is still being touched. And that is complicating the ability to determine the moment when the sensor is no longer touched. My goal is to determine the moment when the sensor is touched and the moment when it is no longer touched with equal reliability no matte