STM8 MCUs

I was making a basic test for GPIO ports (reading switches and turning on LEDs). After configuring PORTB (all pins) as input with internal pull-up and external interrupts disabled, PB7 seems to be always in '0'. After opening IAR-EW debugger, PB_DDR, PB_CR1 and PB_CR2 registers have correct value (0x00, 0xFF, 0x00) but PB_IDR show (0x7F). This is, PORTB bit 7 is '0' (0111 1111). I suspected internal pull-up is damaged (?) then configured PB7 as floating input and connected an external pull-up resistor (PB6:PB0 still as inputs with internal pull-up). I got same behavior. But when I connected an external PULL-DOWN resistor, then PB7 works great and switch connected to this pin produces changes of '1' and '0' (opened / closed).Is really PB7 internal pull-up damaged or not working? (is this the same for all the STM8L152R8's) :sad_but_relieved_face: Does exist any info about not using PB7 as input with internal pull-up? (I cou

We are using STM8 as to monitor and control STMF07 controller and Quectel M66 module if they are not sending pulses in predetermined time. But no physical control or method to reset STM8, So can we restart the program control of STM8 through software, if STM8 program control is lost or it is stuck somewhere. We want to restart STM8, if STM8 stops working. Can a controller monitor itself for hang state? Any help is appreciated.

Hi ,I need to generate PWM using Timer 1 and Timer2 using STM8S003F3 microcontroller to control LEDs. I m new with PWM. I read and referred expamles given on ST.com but it is not understandable for me. If anyone help for easy and full proof example with above controller then let me know.

I am looking for STM32 series product for my Automotive Meter customer.Required spec: 16KB/2KB, 16MHz, 2.7V to 5.5V, VQFN, -40°C to +125°C Application: Automotive meterI checked below ST link, and it seems that below links are OK (?) to meet above requirements?Or do you have a better solution/proposal?https://www.st.com/en/microcontrollers-microprocessors/stm8l151-152.html

I want to make a converter keyboard PS/2 -> USART.

Hi All,I am using "STM8S103F3" controller. When i am reading the voltage levels on the pins "PD6 and PD5" on startup (no external connection), using "IDR" registers, it is showing voltage level as 1 (5v). I want to know, how i can set the voltage level as "0" on this pins. I already tried "Pull up register" of this controller, for this port pins, but it is not working.

Hi. If I create a C floating point number (ab) and set its value equal to a 32 bit integer (or a constant), the integer and the float are very different, at least as reported by the STVD debugger watch window. Normally, I'd expect to see a clean conversion to float. Float to int32_t appears to be working. Just not (any) integer to float. I know I'm dealing with an 8-bit MCU. But what am I doing wrong? Thanks.

Hi. I'm trying to debug some code using the STVD IDE with the STLINK2 (SWIM). For some reason, it just stops at the line TSL_Globals.Tick_ms++;in the file tsl_time.c within TSL_tim_ProcessIT() and will go no further following a call to TSL_user_Init(). Any idea why that would be happening? Thanks.

When I look at the STM8 community forum (https://community.st.com/s/group/0F90X000000AXt8SAG/stm8-mcus), I see no content.I tried with both Firefox 68.5.0esr and Chromium 79.0.3945.130.But I know there should be content: I posted something, and both my post and content from others shows up in the weekly digest email I get from ST.

I'm new to STM8 microcontrollers and have purchased a few STM8S003F3P6 boards to learn how to interface a PS/2 keyboard and mouse. I have installed the ST Visual Develop IDE with STM8 Standard Peripheral Library and started tinkering with blinking a LED. Now, I want to learn more about external interrupts. I tried googling but couldn't find any sample code. Anyone?Best Regards,tinkerBOY

i am currently working on a temperature project which many may well have heard of. the W1209 temperature controller. and i have found everything i need to implement this circuit into my existing project with other features. the code is open for anyone to have and so is the circuit. only from the files i downloaded i need to compile them so i get a hex file that i can the program the chip with. i have some knowledge with arduino and pic from a long time ago, but am struggling to understand how to do this.i have bought the ST Link v2 dongle for programming and not sure which software to best use. if there is anyone who can help and compile the program so i can have the file i need to just send to the chip i would be so grateful.

Hi All,I want to verify memory checksum of my source code. I want to know, which register i can use to verify my memory checksum. Memory checksum i can see in "STVP" during programming, but that checksum i want to verify inside code. Advance thanks for the help.

We are also using a LIS2DW12TR accelerometer. Same question as above.

Hello friends,We use ST-Link when assigning programs to STM8 processors. ST-Link uses the SWIM leg when assigning programs to STM8 processors. We all know that.I want to make a device. Special bootloader. This device should be able to assign programs to STM operators that do not have programs in the device.But I don't have a protocol to throw a program into the empty processor. Is there such a protocol? Is such a device possible? Where can we obtain a protocol?Thanks, good work ..

Hi Team,We are using STM8AL3189TCX in our design and have some general querries for diagnostic report preparation(Specific to project)1) HOST MCU window Watchdog(TPS3850H33QDRCRQ1) If WDI pulse from HOST MCU fails this condition (Lower Boundary (tWDLmin) = 19.1ms-25.6ms & Upper Boundery (tWDUmax) = 46.8-63.3ms). Will the Supervisor asserted low to reset by MCU?2) MCU Power supply Output - UV , OV Fault(+3V3_SYS - TPS7B6933QDCYRQ1)Supervisor will be asserted low to reset, HOST MCU to turn off the system. Is the statement correct?3) MCU ADC_VREF supply(LM4128BQ1MF2.5/NOPB) - Short circuitWhat will happen to Host MCU? Will the MCU reset the whole system?We want to understand if it is possible to diagnose the Host MCU output when Supervisor will be asserted low to reset?

Greetings Friends,I have STM8S Discovery Board with STM8S105 micro controller. I want to use SWIM pin as general purpose IO and also want to use it to upload the code. Is there any possibilities ?

I am facing some issue.I have described some steps below,please go through it and let me how can I fix this issue through Software?Is there any flag need to clear/set or anything?I am using TJA1028 LIN transreceiver for this.Monitor LIN bus and +5VConfirm the LIN communication is OKPerform a short-circuit between LIN and GND with a switch (relay or other) to short the LIN every second (not short – short – not short = 1second) during 10 second.Sometime, when the LIN short to GND is removed, the ECU wakes up and the LIN communication runs normallyTo be sure of the result, perform the test several time ( At least 6 times)You should observe an issue when the LIN short to GND is removed, you don’t recover the LIN communicationTo recover the LIN communication a HW reset is needed ( power off – power on the power supply)

Hi,I am working with the STM8AF5286UDY and am trying to set up a CAN interface.For programming, I use the standard peripheral library. At the moment, my CAN interface works fine. The only thing, which does not work, is the filtering.I use extended IDs and want to get all IDs from 0x18FEC100 to 0x18FEC999.My code looks as follows:/* CAN filter init */ CAN_FilterNumber = CAN_FilterNumber_0; CAN_FilterActivation = ENABLE; CAN_FilterMode = CAN_FilterMode_IdMask; CAN_FilterScale = CAN_FilterScale_32Bit;  CAN_FilterID1=0x18FEC101; CAN_FilterID2=0; CAN_FilterID3=0; CAN_FilterID4=0; CAN_FilterIDMask1=0x1FFFF000; CAN_FilterIDMask2=0; CAN_FilterIDMask3=0; CAN_FilterIDMask4=0;   CAN_FilterInit(CAN_FilterNumber, CAN_FilterActivation, CAN_FilterMode,   &nb

hi, every one I observed that in S1 type s19 file, the content is started with adress 8080, and in the end, there is 8000 adress, why they are given like that, there is any specific reason, can i make it in order by making change in settings in my IDEbut for S2 type file it is in sequence.can any one have answer,please reply me,i attached the S1 type s19 file for reference.

I am using STM8L052C6T6.Current MCU knows that EEPROM is 256Bytes (0x1000 ~ 0x10FF).What happens if you use more than 0x10FF to put data in the reserved area address?If you do so, will the value of 0x1100 be put in 0x1000?And what happens if the MCU's power is unstable when saving data to the EEPROM?

Dear SDCC users,On the 30th of January SDCC 4.0.0 has been released.As always it has been put online in the SourceForge File section.https://sourceforge.net/projects/sdcc/files/There have been various improvements, both features and bug fixes sinceSDCC 3.9.0. The full ChangeLog is at:https://sourceforge.net/p/sdcc/code/HEAD/tree/tags/sdcc-4.0.0/sdcc/ChangeLogThe following is a list of particularly noteworthy new features.* The pdk15 backend now passes the regression tests (both with and without --stack-auto), and is thus considered stable.

Hi all,​I tried to configure STM8AF62Ax's TIM1 in center-aligned mode to generate 1kHz PWM output.​Also I'd like to generate a 2kHz interrupt by both overflow and underflow update event in TIM1.Now I can measure PWM patterns on scope, but the interrupt routine "TIM1_UPD_OVF_TRG_BRK_IRQHandler" is not being executed (not even once).I'm using STM8S standard peripheral libraries. The following function shows how I initiate TIM1.----------------------------------------------------------------------------------------------------void TIM1_Config(void){TIM1_DeInit();TIM1_TimeBaseInit(15, TIM1_COUNTERMODE_CENTERALIGNED1, 499, 0);TIM1_ARRPreloadConfig(ENABLE);TIM1_OC1Init(TIM1_OCMODE_PWM1,TIM1_OUTPUTSTATE_ENABLE, TIM1_OUTPUTNSTATE_DISABLE, 249, TIM1_OCPOLARITY_HIGH, TIM1_OCNPOLARITY_LOW, TIM1_OCIDLESTATE_SET, TIM1_OCNIDLESTATE_RESET);

standard IAR program. Transmit works normally ( without interrupts ).Receiving doesn't work not with flag polling, not with interrupt. I have seen in Internet similar questions, but no one answer with reasonable explanation or unconditionally working example. Thanks in advance.

I am using STM8S103F2 controller in assembly language. I want to load directly value in "XL" index register in one instruction and i do not want to affect "XH" register. (Index "x" register is the combination of XH and XL). Other ways to load value in "X" index register:LDW x,#$50LD A,#$10 LD XL,A

HiI am developing code for an STM8 processor using ST Visual Developer. I have started having issues with debugging my application. When I click the Debug icon, STVD crashes. In the debug output I can see that it is trying to open the .elf file. The next line says that it failed to change to the Debug directory.I have had Debug sessions working in the past, so I'm not sure what has changed. Any ideas would be appreciated.Thanks