STM8 MCUs

Posted on September 07, 2011 at 10:23Hi all, How to prevent copy firmware for stm8l MCUs? Tks all.

Posted on September 07, 2011 at 15:14Hi:     STM8S105 is used, there have more reset sources according to manual.     1,When power on, if reset interrupt is enable, first enter into POR, then enter BOR,POR is off.     2,When power down, if reset interrupt is enable,enter into BOR.     RESET interrupt vector is only one, so enter into BOR interrupt, how to distinguish what is caused by POR or BOR?     Thanks!     Best Regards! Fred

Posted on September 07, 2011 at 14:55How to initialize the RAM in STM8S105xxxHi:       I want to initialize the space of  RAM(the whole RAM), please tell me how to operate. Thanks! the language is c. Fred

Posted on August 30, 2011 at 11:07Hello,I'm using STM8L152C6 as a slave I2C device. I'm able to receive the first byte with acknowledge but successive rx data go along with NACKs. Here's my I2C configuration:CLK_PeripheralClockConfig(CLK_Peripheral_I2C1, ENABLE);CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1);I2C_DeInit(I2C1);I2C_Init(I2C1, 80000,DATACOMM_SLAVE_ADDRESS<<1, I2C_Mode_I2CI2C_DutyCycle_2, I2C_Ack_Enable, I2C_AcknowledgedAddress_7bit);// Enable I2C InterruptI2C_ITConfig(I2C1,(I2C_IT_TypeDef)(I2C_IT_EVT | I2C_IT_BUF), ENABLE); // Set I2C IT software priority as highestITC_SetSoftwarePriority(I2C1_IRQn, ITC_PriorityLevel_3);How should assert successive ACKs after receiving the first byte?Could someone help me with this issue?I also attach a screenshot of the I2C timing for further information.

Posted on July 13, 2011 at 07:43I am trying to program a hex file in STM8S103F2P6 using ST-Link via STVPHowever, I get the error> Programming  PROGRAM MEMORY area...Error : Cannot communicate with the board.Wrong board selection or check board power supply or check that a previous session is closed.Error : < PROGRAM MEMORY programming failed.Configuration:Windows SP3, STLINK V1, Firmware: V1.J12.S3 JTAG+SWIM DebuggerTarget: STM8S103F2P6Is there another utility that can be used to program STM8S via ST-Link.Thanks. #stlink #stm8-swim-connect

Posted on August 30, 2011 at 02:22I'm trying to create an interrupt handler that will toggle an LED on and off very quickly  (as a basic test, my end goal is to eventually do much more than that). Right now I have an interrupt handler which is configured to be triggered by TIM1, and while it does seem that the interrupt handler is being called, the LED is just staying off. What am I doing wrong? Below are stm8s_it.h, sm8s_it.c, main.c, and stm8s_interrupt_vector.c . /********** stm8s_it.h **********/ #ifndef __STM8S_IT_H #define __STM8S_IT_H @far @interrupt void TIM1_UPD_OVF_TRG_BRK_IRQHandler(void); #endif /********** end stm8s_it.h **********/ /********** sm8s_it.c **********/ #include ''stm8s.h'' #include ''stm8s_it.h'' void TIM1_UPD_OVF_TRG_BRK_IRQHandler(void) {     /* If I set a break point on the next line,

Posted on August 22, 2011 at 11:33I try to modify code from TSL V.2.4.0 in ''Example01_STM8S207_RC_5k'' for run on STM8S103K3 and STM8S105C6. Test on board STM8S discovery (for STM8S105C6). Follow TSL document to modify code but it not work. LED is blink (base code on project Adjustable LED blinking speed), but on touch sense notting happen. LED blink speed not change. Both STM8S105C6T6 and STM8S103K3 I think, I try every thing in document say. Can some one show me for the example code (for Cosmic compiler is great). Thank for advance.

Posted on June 23, 2011 at 14:43Dear,The allowed tolerance of oscillator frequency in my planned application is 1%. I'd like to use HSI and periodically to calibrate it. There is an application note describing the process + SW code. The method applied there is to measure some referenced frequency and to compare the measured frequency vs the known value. The frequency reference should be generated by an external crystal. The method is OK, but in this way external crystal is required( = money, PCB place). I thought about another approach. I'd like to calibrate the HSI oscillator with temperature sensor. The best thing would be to build any linear(or another) function - Freq (temperature) but the Datasheet does not have Freq vs Temperature characteristic ( just a range of -2 to +2 %), so if I want this approach I could try to find the function by myself in experiment, Or slightly another method is to build a look-up table, also in exper

Posted on August 13, 2011 at 16:21I am getting a linker error message that I cannot find a way to resolve - here is the error:Running Linkerclnk -l''C:\Program Files\COSMIC\CXSTM8_16K\Lib'' -l''C:\Program Files\COSMIC\CXSTM8_16K''  -o Debug\newarmour.sm8 -l..\project -l''..\..\..\..\..\..\..\..\program files\cosmic\cxstm8_16k'' -mDebug\newarmour.map #error clnk :1 missing command file The command: ''clnk -l''C:\Program Files\COSMIC\CXSTM8_16K\Lib'' -l''C:\Program Files\COSMIC\CXSTM8_16K''  -o Debug\newarmour.sm8 -l..\project -l''..\..\..\..\..\..\..\..\program files\cosmic\cxstm8_16k'' -mDebug\newarmour.map '' has failed, the returned value is: 1exit code=1.newarmour.elf - 2 error(s), 0 warning(s)I am not typically running this kind of software - I am a sale/appliction engineer trying to fix a problem for a customer, so I am

Posted on August 05, 2011 at 12:26The GPIO struct is defined but it is not initialized before it is used in main.  Everything works but I am stuck with trying to find a value that I can use in GPIO_Init.  GPIOx->CR2 is OR'd with another value and I don't know where to get the initial value GPIOx->CR2.  The only thing I can think is that a random number is in that address. This is in the given program that comes with the firmware.  I am new to C and this is probably a simple problem.  Thanks, Chris In the main function that comes with the Discovery microcontroller.  The first thing that main does is to call GPIO_Init.   I have included it here.void GPIO_Init(GPIO_TypeDef* GPIOx,                uint8_t GPIO_Pin,     &nbs

Posted on March 26, 2011 at 04:17Just received my STM8L-Discovery, installed STVD 4.2.1 and Raisonance compiler. Whenever I hit F7, STVD shows this non-descriptive message ''The parameter is incorrect''. After that, the only way to exit the application is to kill it in the Task Manager. I tried it on Win XP and Win 7 (32-bit) with same results. Does anyone experienced a similar problem? Thanks for help!

Posted on August 04, 2011 at 08:53When I use PA6,PD6 is EXTI_Trigger_Rising_Falling.When PA6 go H-->L, it generate interrupt, but When I keep PA6 still Low, and PD6 go H-->L, it not generate interrupt. Please help me. void main() {     CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1);      GPIO_Init(GPIOD ,GPIO_Pin_6, GPIO_Mode_In_FL_IT);     GPIO_Init(GPIOA ,GPIO_Pin_6, GPIO_Mode_In_FL_IT);     EXTI_SetPinSensitivity(EXTI_Pin_6, EXTI_Trigger_Rising_Falling);     enableInterrupts();     while (1)     {     }; } /**   * @brief External IT PIN6 Interrupt routine.   * @param  None   * @retval None   */ INTERRUPT_HANDLER(EXTI6_IRQHandler,

Posted on June 06, 2011 at 11:56 If writing (erasing) byte(word, block) in the eeprom memory, DMA transaction occurs on the periphery of RAM (tested only this type of transfer) of the microcontroller hangs (not working). The documentation no found indication that it is impossible to use the DMA controller when working with EEPROM memory.Tell me anything on this issue. P/S Sorry for my english #stm8l151k6 #eeprom #dma

Posted on August 02, 2011 at 19:30I'm trying to us the software simulator to simulate the 207S6 but the internal registers don't seem to be working correctly. The reset value are all ff's. The ADC doesn't seem to function as well as the timers anyone have any idea if I need to set something in the STVD? I was also trying to use a stimulus file but I keep getting an error that the pin is not assigned correctly. Can I use the assignment I'm using my code?

Posted on July 30, 2011 at 02:39Never used the Cosmic complier before do I require any header like math.h to do a u16*u16 into u32 doesn't seem to do anything.

Posted on July 28, 2011 at 09:39Hi,I am using STM8S103 where I noticed that its UART BAUD rate is not supported for 1200bps at BRR1=41H and BRR2=36H (as per ref. manual ) tested at 16Mhz internal with pre-scaler at 1 and at 16Mhz external.Whereas it is working OK with all bps setting above then 9600BPS.Can any body FIX this issue ?regards,V.K. Verma

Posted on July 25, 2011 at 17:35I need to config my stm8s105k6 to work with oscillator of 16Mhz my code : CLK_ClockSwitchCmd ( ENABLE );  CLK->SWR  = 0xB4;  CLK->SWR  = 0xB4;  while ( !(CLK->CMSR == 0xB4 ) ); I get stuck behind the while loop Am I missing something ? #hse-config

Posted on July 12, 2011 at 13:13Hi experts, in my application I am trying to write a single byte to an address in the DATA EEPROM area immediately after disabling ''the DATA area write protection by writing consecutively .. MASS keys to the FLASH_DUKR register''.--> But writing will be ignored!!   Inserting at least one instruction after writing the MASS keys solves the problem.Code: ...      FLASH_DUKR = 0xAE;      FLASH_DUKR = 0x56;      *DATA_EEPROM_destination = char_value; From the Disassembler: ....... eep.c:226        FLASH_DUKR = 0xAE; 0x8db2 0x35AE5064     MOV   _FLASH_DUKR,#0xae eep.c:227      FLASH_DUKR = 0x56;

Posted on July 19, 2011 at 14:29Hi.   No stm8s103 in ''STVD\settings\MCUselection list It start with stm8s207 I have cosmic 16 k free compiler additional problem is ''#error clnk Release\rtos_osa_hw.lkf:1 no default placement for segment .info.'' Thanks for any help

Posted on July 04, 2011 at 09:33After having written a time consuming and reasonably eloquent request about this subject, only to have it rejected and erased, I'll make a shorter attempt. Is it not possible to have straight forward assembler templates and .asm .inc files for the STM8 as was for product in the ST7 range? All product that I have designed in the past many years (ST driven...lemaitreltd.com) has used this format, which I am very comfortable with. My research has found no support for this at all. I would really like to continue using ST devices for the very sound reasons I made the decision to use them initially. Having formats like this would not only be a very easy inclusion, relating to the powers within the ST team skillset, but would be very helpful for those of us who desire this approach to development, and assist in the inevitable learning curve that will always exist.

Posted on June 30, 2011 at 00:16Hi, I want to use strncmp function in my code [ if (strnicmp(temp, GPVTG, 5)) ], but I've got an error: &sharperror cpstm8 ..\..\src\main.c:278(12) missing prototype I have string.h file in my include files, but I think that is not enough ;], what should i do now? #rtfm

Posted on July 05, 2011 at 12:55Hi, I have question regarding STM8S wait states. When exactly wait states are executed - every access to XFLASH or every instruction feed? I want to clock my MCU with 24Mhz crystal oscilator (1 wait state) and I need to know what will be the speed gain in comparison with 16MHz clock (0 wait states). How much instructions are cycle acurate while wait states are on? I cant find any information on this topic. Thanks, Pawel

Posted on July 03, 2011 at 23:15I'm porting some code designed to run on a Nordic nRF8200 to an STM8L152C6. The code was orginally compiled using Keil C5. I am using the Cosmic CXSTM8 compiler. I am getting a compiler error 'Invalid Constant Expression' in the CASE: line of a switch statement that I cannot understand. code snippet is included below. switch (pipe_num)   {     case PIPE_LINK_LOSS_ALERT_ALERT_LEVEL_RX:       alert_handle_on_link_loss = (alert_level_t)buffer[0];       break;      default:        break;   } pipe_num is a locally defined uint8_t, and  #define PIPE_LINK_LOSS_ALERT_ALERT_LEVEL_RX  6 is declared in an included header file. I cannot understand what the compiler is tak

Posted on June 20, 2011 at 22:53Hello everyone, I've got problem with compilation of my application Running Linker clnk -l''C:\Program Files\COSMIC\CXSTM8_16K\Lib''  -o Debug\stvd_project.sm8 -mDebug\stvd_project.map Debug\stvd_project.lkf #error clnk Debug\stvd_project.lkf:1 segment .bsct size overflow (296) #error clnk Debug\stvd_project.lkf:1 segment .ubsct size overflow (10)  The command: ''clnk -l''C:\Program Files\COSMIC\CXSTM8_16K\Lib''  -o Debug\stvd_project.sm8 -mDebug\stvd_project.map Debug\stvd_project.lkf '' has failed, the returned value is: 1 exit code=1.Is there anyone that can help with this problem?Thank you in advance.

Posted on June 24, 2011 at 07:31Hi, Port-c pc6 is connected to a 50 Hz square wave signal, the problem is the variable cCounter did not increment in the port_c_isr, so the PC4 pin did not toggle, please advise about the solution. Thanks ======================================================== #include <iostm8s903.h> unsigned char       cCounter; void    main(void) {  CLK_ICKCR = 0x01;      // high speed internal osc enable  CLK_ECKCR = 0x00;      // high speed xtal osc disable  CLK_SWR  = 0xE1;       // select high speed internal osc as master clock  CLK_CKDIVR = 0x10;     // master clk divide / 4, cpu clk div / 1    PC_O