STM8 MCUs

Posted on April 27, 2012 at 15:50HiHere is the bug I found in STVD:While trying to debug a program I set a breakpoint on a line, load the debugger and bam error:one or more breakpoints are not positioned on valid lines.I know this is a valid line, this same breakpoint worked yesterday and before that... I tryed to delete the project files, nothing worksany idea to fix ST software?

Posted on June 18, 2014 at 07:38hi clive I am using Stm8 for using as i2c slave Device & stm32 as master . From master I am Sending 2 bytes of  Data after  address  Problem i am getting is I am getting Data Only once after that only ist byte of data . Here is  some Lines of Codes From Handler.INTERRUPT_HANDLER(I2C_IRQHandler, 19) {     uint8_t b;  if((I2C->SR1 & 0x02 )== 0x02)  {   b+=I2C->SR1;   b+=I2C->SR3;  }    if ((I2C->SR1 & 0x40) ==0x40 )  {   test1= I2C->DR;  }  //recieve[a]= I2C->DR;  if ((I2C->SR1 & (0x40|0x04)) ==(0x40|0x04) )  {   b=I2C->SR1;   test2= I2C->DR;  }

Posted on March 04, 2014 at 09:00 Hi All I want to measure PWM output of RGB controller with STM8S105 @16Mhz internal oscillator. The PWM signals are phase align and PWM signal frequency is 500 Hz.. PWM signal duty is changing between 0% and 100%. System start 0%, 100% or any value between 0% and 100%. I connected TIM1 Channel1 and Channel2 to Red_PWM, TIM1 Channel3 and Channel 4 to Green_PWM channels. I can catch all values when I apply a input PWM. If I apply second or third channel or all of them, I can not catch 2-3% PWM each channel. I read random variables. I think that is cause from resetting TIM1 counter (TIM1_SetCounter(0x00);) but I didn't handle. Could anyone suggest a solution ? INTERRUPT_HANDLER(TIM1_CAP_COM_IRQHandler, 12) { /* In order to detect unexpected events during development, it is recommended to set a breakpoint on the following instruction. */ if((TIM1->SR1 & TIM1_FLAG_CC1) == TIM1_FLAG_CC1) { TIM1_ClearFl

Posted on June 23, 2014 at 14:57I want to detect failure of the LSE using LSE_CSS. Main clock is HSI but LSE clcoks the RTC and provides a 50mS systick via the wakeup interrupt. When not busy the micro executes the HALT instruction to save power until the next wakeup.The LSE_CSS uses the LSI. Will this mechanism work if the LSE fails while the micro is in HALT mode as the LSI can't operate in HALT mode according to the datasheet ? #lsi-lse

Posted on June 09, 2014 at 20:26Hi,I use a stm8a-discovery board and IAR workbench for STM8 1.42 to developp a project.I try to DEBUG my application but I have a problem when I use breakpoint or break the application execution because the MCU stop when it is on the breakpoint. For example, if I use output PWM, I see PWM on oscilloscope until I break the execution and I see it again when I execute from the current statement.How can I change it to don't stop the MCU when I break the application execution ?Thank you

Posted on June 16, 2014 at 08:55I'm very new to electronics and have a basic question regarding timer setup. I'm using an STM8L151K6 and am trying to configure TIM2 to simply generate an interrupt every 30 seconds using the standard peripheral library. I don't require any type of waveform generation, just a 30 second timeout to disable an attached IC. The MCU is halted during this time, so I do require an interrupt to wake. If possible, how do I configure TIM2 for this interval?

Posted on June 12, 2014 at 21:15I am new to STM parts.  the data sheet I have from ST on the 8 bit MCU does not have a detailed description of SFR's.  So I need someone to post a link to the files because I have looked all over and found a bunch of stuff I can't use.  Also is there any example projects for basic stuff out there?  I need to do something very basic and none of the documentation I have found explains how to do it.  What I need to sart with is an interupt from a timer overflow so I can set up a 1msec flag for general state machine control. Thanks for any help! I am adding that if I break in the debugger and set the values it works.  but using the following code is not setting the values.    TIM4->ARR = 0x80;                    TIM4->PSCR=

Posted on January 17, 2014 at 19:41Hi, I would like to know if someone had been capable to use  the complementary outputs of timer 1, I found  an example in the standard peripheral library called TIM1_ComplementarySignals_DeadTime_Break_LockI flashed it in the Discovery board, the normal OC outputs are OK but the complementary outputs doesn't work y have changed polarity and read the datasheet but I can't get it to work,Could you advise?Tnx #tim1-pwm-complementary-outputs

Posted on June 06, 2014 at 23:00I'm having trouble getting active halt mode to work on an STM8L.  I can get it to wake up from a halt condition using an external interrupt. However, when I try to do the same thing using the real-time clock, it doesn't work. Does anyone have some sample code that I can use for placing this thing into active halt and having it wake up based on the RTC?  Again, this is for the STM8L.

Posted on May 26, 2014 at 20:53Hi,i´m having some problem with my code. I can´t use AWU.Can anybody send me an example?

Posted on March 11, 2014 at 18:09Hello, I am having an error message when I build my codes using the ''release'' mode in order to generate the .s19 file before programming my MCU. Running Linkerclnk -lC:\Lib  -o Release\discover.sm8 Release\discover.lkf &sharperror clnk Release\discover.lkf:1 no default placement for segment .dataeeprom&sharperror clnk Release\discover.lkf:1 no default placement for segment .DISPLAY The command: ''clnk -lC:\Lib  -o Release\discover.sm8 Release\discover.lkf '' has failed, the returned value is: 1exit code=1.Before that, I already built successfully my codes with the ''debug'' mode. The only thing I modified in my code for the ''release'' mode was that I uncommented one line which defined my target STM8L device in the stm8l15.h file. (I made this because when it was required when I build from

Posted on June 03, 2014 at 20:52I have working code for DAC testing, and it works fine on STM8L152C6 (Discovery board), but meet some problems with STM8L152K6. It works about as expected, excepting output has permanent additional value 0.88V. I tried PB4..PB6 pins with same result. And output volatge doesn't depend from switching on/off output DAC buffer (I suppose it should be changed a little bit). All pins input mode without pull-up. Testing code is very easy:1. initialize RI (alllow comparators)2. map DAC to pin3. write exact value to DAC in loopnothing unusual. Tried different MCU on different PCB. Nothing connected to output pins excepting voltmeter. But error still there.Some ideas? #dac

Posted on May 29, 2014 at 12:17Hello, I'm using Cosmic STM8 32K Special Edition Free license v. 4.3.11 under STVD IDE. MCU: STM8L151 I'm trying to place 4 bytes with specific values into absolute memory address. I found in manual and even on cosmic web FAQ this help:http://www.cosmic-software.com/faq/faq3.php So I did exactly same, but in flash there are only zeros, so it seems it doesn't work. Compiler and Linker doesn't produce any warning or error. Here is part in my code:&sharppragma section const {chanid}                  const unsigned char variable1 = 0x56;              &nbsp

Posted on May 28, 2014 at 00:36We use STVP (v3.3.1) for programming parts.  I'm in the process of adding the Serial Number, using that feature in STVP.  But we have a number of stations, and so each has unique identifying information.  For example, I want to put the following string in EEPROM if from station 1 at site 2: ''0102xxxx'' where xxxx is the serial number generated by STVP. For station 2, at site 2: ''0202xxxx'' where XXXX is a similarly generated independent serial number - the station number and/or location number makes it unique. So the problem is: is there a command line interface or script method of getting station and location specific information into STVP for programming to an EEROM location??? If so, how do I do this?

Posted on May 28, 2014 at 12:58Hello am making control panel using stm8s105 controller and springs electrodes. Everything works fine but some times device become extra sensitive and  all touch buttons making switch on in a random way without any contact on them and than after a while all become work as usualy .I made cirquit without active shield  because i used springs electrodes and one side pcb.Here is a photo of devicehttps://dl.dropboxusercontent.com/u/92887381/Control%20board/Board.JPGand stm8_tsl_conf.h filehttps://dl.dropboxusercontent.com/u/92887381/Control%20board/stm8_tsl_conf.hCan anyone

Posted on May 26, 2014 at 20:55Is there some way to turn off a pull up input for some time and later turn it on on a certain frequency? The pull up pin drain too much current.

Posted on February 12, 2013 at 01:29What is the interrupt latency on STM8S MCUs? I am new to STM8 and the few docs I have read do not mention it.

Posted on May 22, 2014 at 13:09Dear All,I've been discovering STM8 core capabilties and properties for a while. I've had a chance to read datasheet for STM8L152. But I couldn't find detailed register info. For instance, CCR (Condition Code) register bit definitions are not clear as far as I saw. Do you have a source (document/web site etc.) to recommend?Best Regards,Batu

Posted on May 15, 2014 at 20:15I have the STMT/8L-EV1 and I'd like to generate a 4KHz beep sound when one of the directional buttons is pressed.  Seems straight forward but I'm not sure how to implement it.  I've tried just using and turning the GPIO pin on and off to no avail.  I've tried to use the PWM for the TIM1_Channel2 the buzzer is on but that didn't work either.  I don't want the beep tied to a timer or interrupt.  All I need is a function to turn it on and one to turn it off.Any ideas? Thanks. #stm8 #beep #stm8l

Posted on May 18, 2014 at 09:52I am doing some work which requires precise timing and I think the STM8S can do what I need.  In order to prove this I setup a simple program which toggles PD0 in a while loop.I am using the IAR compiler and it compiles the following:PD_ODR = 0;PD_ODR = 1;to:clr PD_ODRmov PD_ODR, ♯?b1The clear instruction operates in 1 clock cycle but the mov takes 2 cycles.  I decided to try the inline assembler and changed the C statement to:asm(''bres PD_ODR, &sharp0'');asm(''bset PD_ODR, &sharp0'');PM0044 states that these instructions should take 1 cycle each but they both appear to take 2 cycles.Has anyone seen this?  I'm wondering if PM0044 is correct.Regards,Mark #timing-s

Posted on May 07, 2014 at 02:56I'm using the STM8L101F3 with IAR. I would like to set and clear the Activation level bit. There is no library function to access this and I'm not sure how to access this register from code. Looking at iostm8l101f3.h, the register and bit is defined: /* Global configuration register */ #ifdef __IAR_SYSTEMS_ICC__ typedef struct {   unsigned char SWD         : 1;   unsigned char AL          : 1; } __BITS_CPU_CFG_GCR; #endif __IO_REG8_BIT(CPU_CFG_GCR, 0x7F60, __READ_WRITE, __BITS_CPU_CFG_GCR); #define CPU_CFG_GCR_AL           CPU_CFG_GCR_bit.AL But trying to modify the bit from code using: CPU_CFG_GCR_AL = 1; generates an error:  E

Posted on May 07, 2014 at 09:18I intend to implement a single touch key using stm8 touch library. I am having few issues regarding this.I haven't used the shield concept for noise immunity, so what does a need to define for : SCKEY_P2_DRIVEN_SHIELD_MASK in the configuration file.&sharpinclude''stm8s.h''&sharpinclude''stm8_tsl_api.h''&sharpdefine LED1_GPIO_PORT             (GPIOB)&sharpdefine LED1_GPIO_PIN             (GPIO_PIN_4)void main(){  LED1_GPIO_PORT->ODR |= (uint8_t)(LED1_GPIO_PIN);  LED1_GPIO_PORT->DDR |= (uint8_t)(LED1_GPIO_PIN);  LED1_GPIO_PORT->CR1 |= (uint8_t)(LED1_GPIO_PIN);  LED1_GPIO_PORT->CR2 &= (uint8_t)(~(LED1_GPIO_PIN));    TSL_Init();  sSCKeyIn

Posted on May 07, 2014 at 09:00I intend to use the stm8s touch sensing library, can someone tell me the significance of SCKEY_P1_DRIVEN_SHIELD_MASK , given in the stm8_tsl_conf.h file.Thank you #stm8s-touch-sensing #stm8s-discovery

Posted on June 24, 2013 at 13:13Hello! Have anybody any information on bootloader interface configuration for I couldn't find direct instructions on port connections. I assume they should be PC2 and PC3 pins (due to SYSCFG->RMPCR1 default value) but there is some problem: STM8LF151F3 in UFQFPN20 package have no these pins. So is it even possible to use bootloader in UART mode with this package or I should look towards usin SPI interface? By the way, which pins do bootloader require for SPI? Maybe PB5, PB6, PB7 ? #bootloader

Posted on May 05, 2014 at 08:50If I get...  #error cpstm8 pins_stm8s.c:28(4) missing prototypeon an...  assert( pPin->pPio == GPIOA );even though the file contains...  #include <assert.h>what have I missed/messed?Thank you.