STM8 MCUs

Posted on September 10, 2013 at 14:17I am designing one energy meter product where I have connected my STM8S microcontroller with STPM10 energy meter IC. The controller is communicating with the IC via SPI communication. But while reading from the STPM10 IC, the data line(MOSI from controller) always remain in high state whereas other lines like SCL, SCS, SYN line are working fine. I have checked all the hardware connection and even the firmware. Don't know where i am getting wrong? Need serious help. I have attached the waveform of reading date from IC and the circuit diagram that i am using to interface STPM10 with STM8S

Posted on December 21, 2014 at 18:18 set up the prescaler and period, and let it run. then at certain point, I want to set the counter to some specific value. however, it seems that setting counter using TIM1_SetCounter(), can actually clear the prescaler setting(TIM1->PSCR = 0). I wasn't sure whether this is a silicon bug or not. would anyone make a test about this problem with his STM8S? and solution: set the desired prescaler immediately after SetCounter(), like my example below. void setcntr() { TIM1_SetCounter(1); TIM1->PSCRH = 0; TIM1->PSCRL = 15; TIM1->EGR =TIM1_PSCRELOADMODE_IMMEDIATE; }

Posted on December 20, 2014 at 08:09</p>I am trying to add a 2nd I2C peripheral with an address of 0x42 to my STM8L development system, and I’m having a hard time understanding how to go about it.  The first I2C peripheral with address of 0x90 is working good and the I2C address is defined like this:Line 65  #define LM75_ADDR    0x90          (this LM75 is a carryover from the temp sensor that was on the eval board)  (found in stm8_eval_i2c_tsensor.h) </p>Line 183 I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Transmitter);                                         &nb

Posted on December 18, 2014 at 11:03I�m going through this application note on the ST website: http://www.st.com/web/en/catalog/tools/PF258002The application note states that it comes with source code for an example of an IAP bootloader implementation: �For this purpose, an example of a user-bootloader firmware is provided with this application note. This package is divided into three main subdirectories, each one dedicated to one STM8 family member: STM8AF, STM8L and STM8S. For the STM8AL family, please use the STM8L directory. Each directory is composed of the following components: ? Sources: containing the firmware source code�However, the download link on the same page (STSW-STM8062) only has S19 hex files and no source code. I was wondering if someone coul

Posted on December 12, 2014 at 04:29HI everyone, i am new to STVD and stm8, cosmic C i follow the thread of this https://my.st.com/public/STe2ecommunities/mcu/Lists/stm81/Flat.aspx?RootFolder=/public/STe2ecommunities/mcu/Lists/stm81/Output%20Size%20in%20IDE%20%28ROM%20%20RAM%20Usage%29&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580001E3853D9DB932A46A3FE4CD15CAB46FB&currentviews=2189 and it outcomes : ---------- DEBUG\TEST_ALL.MAP start 00008080 end 0000808c length    12 segment .const start 000080cf end 00009b16 length&nbsp

Posted on July 17, 2014 at 18:25Dear STM08 Technical supportI am a consultant developing a flash programmer tool for the STM8 that runs on the Teradyne Test Station platform. The end users of this tool will be two high volume users of STM08 devices.I have so far achieved only partial functionality of the SWIM debug module. And I need further advice to make it work.My questions will reference document UM0470.I don�t believe I have achieved successful completion of the eight step sequence described on page 10. I get to step 6 �Write 0A0h in the SWIM_CSR�. I assume at this point I need to do a WOTF 01 00 F7 80 A0. The STM08 returns an ACK for the WOTF command, and every data byte except for the A0 at the end.  At this time the STM08 does not ACK or NACK, it simply floats high. I do know that the SWIM is at least partially working because I get the first 5 ACK responses.

Posted on December 09, 2013 at 19:15Hi,This is my first post so hi everyone. I would like to program the four STM8 in parallel.I would like to use for this ''STVP_CmdLine.exe'' and ST-Link's V2.  I know that the programmers have different numbers VID / PID. How can I use it to choose which programmer can I use?Regards #stvp_cmdline.exe-stm8-st-link

Posted on May 17, 2013 at 06:53Hi All, am developing one programmer tool as like ST visual tool , for flashing s19 file.but i dont have API for that . but in website mentioned use PtkApi.cpp but this cant able to download , if any one have idea about this code and API , please share it.i have to develop from C♯ technology , please if any one idea about this share it.Thanks Rajeeva B J  #stvd-flashing-tool-api #stm8-programmer/flasher

Posted on December 05, 2014 at 14:58I am using STM8S003F3 & attached is circuit. I have connected some switches in pull-up configuration as shown. After some correct operations, I have seen that some of boards stopped working. It was problem 1 as below in damaged boards & problem 2 in one of damaged board. 1. On debugging, I had checked that voltage at reset pin is around 2V. This keep the device in reset state & won't allow running. I don't understand why this is happening. All the voltages that I have applied are within range. I have also removed the RC network across reset pin, but still pin is showing 2V approx. What could be possible reason? 2. On one of switch pin, either I give 0V or 5V, software always read zero. However when I configure same pin as output, I am able to toggle the pin. But as soon as configured as input, it always read zer

Posted on October 29, 2014 at 17:07Hello, I'm using the STM8L151 using IAR workbench without ST Firmware Library and I'm trying to use an SPI Interrupt. Unfortunatey it doesn't work. SPI is already running, the receiving flag is set, but i don't get an Interrupt: This is the configuration:   SYSCFG_RMPCR1=0x00;                          //MIS0->PB7, MOSI->PB6, SCK->PB5, NSS->PB4   CLK_PCKENR1=0x10;                             //enable SPI clock   SPI1_CR1=0x30;                       

Posted on December 01, 2014 at 08:15Hello,  According to reference manual IWDG will not be stopped even after entering HALT mode. Is there a possibility to STOP or PAUSE IWDG for STM8A ? According to STM8AL we can halt IWDG, but STM8AL is not suitable for our application. In our application ECU will go to sleep and wait for interrupts and IWDG would reset if not refreshed. WWDG cannot be used as it uses fcpu   (CPU clock) Regards, Kavita

Posted on November 11, 2013 at 12:34HiWe are developing with STM8L152C6 microcontroller and debugging using the discovery board.Our application uses a battery when there is no power. In this case, we need only two I/O interrupts and the LCD to be working.We decided to run the microcontroller in the halt mode when we do not need to use the LCD and in active halt mode when it is required to use the LCD.We are using stm8l libraries version 1.6.1 (released on 28-June-2013). To run the microcontroller in the halt mode we called the HALT instruction by calling the library function halt().The question is: how to configure the microcontroller to run in the active halt mode?Thanks in advance #stm8l-active-halt

Posted on November 20, 2014 at 11:41Hi AllI want to read 2 channel ADC from ADC1 library. You can see my code below. I used scan mode and conversation mode single. I take 4 samples in interrupt and used average of them in my main code. My problem is sometimes ADC1_GetBufferValue(1) or ADC1_GetBufferValue(0) returns bigger than 1023. For example 20000, 40000 or something like that. Could you have any opinion for this issue ?void ADC_Configuration(void){ ADC1_DeInit(); ADC1_Cmd(ENABLE); ADC1_Init(ADC1_CONVERSIONMODE_SINGLE, ADC1_CHANNEL_1, ADC1_PRESSEL_FCPU_D18, \ ADC1_EXTTRIG_TIM, DISABLE, ADC1_ALIGN_RIGHT, ADC1_SCHMITTTRIG_ALL, DISABLE); ADC1_ScanModeCmd(ENABLE);  ADC1_ITConfig(ADC1_IT_EOCIE, ENABLE); ADC1_DataBufferCmd(ENABLE); ADC1_StartConversion();} INTERRUPT_HANDLER(ADC1_IRQHandler, 22) {

Posted on April 26, 2011 at 06:32Hello All, I used to teach at a university in Ontario; I switched to another job in the industry. I have developed a number of simple examples meant to gradually introduce students to programming the STM8S Discovery board.  Also, I have developed 2 projects: 1) the software for a rover that either tracks a line, or it is manually controlled using an infrared remote controller, using the SONY communication protocol.  The tracking method can also use Fuzzy Logic, in the application. 2) an impedance protection relay with directional capability. These were 2 projects for 2 different courses I was teaching; an Advanced Mechatronics and a Power System Protection Relaying course. I would not mind sharing with anyone the material I have developed, including course notes, etc.  I just do not know where / how to post this, and if anyone

Posted on November 08, 2014 at 11:361. I have STM8S003F3 & want to use its debug pin as output. So I will configure it my code.2. Will that make debug option dead?On next power up, will I be able to debug the code?? Because pin will already be configured as output by that time

Posted on November 08, 2014 at 09:50I have just began with STM8 and I use IAR. I'm in trouble with Option Bytes with both of IAR and STVP. They have some differences between them. I use STM8S105C6T6 chip. I also searched in datasheet, user manual, reference manual from ST but I didn't find the answer yet. Maybe, I missed something. Hope people help me!With Option Bytes of IAR: _ UBC: has 2 options: Write protection disabled and Write protected _ I2C: has 2 options: Frozen when stopped and Running. _ Timer1: has 2 options: Frozen when stopped and Running. _ Timer2: has 2 options: Frozen when stopped and Running. _ Timer3: has 2 options: Frozen when stopped and Running. _ Timer4: has 2 options: Frozen when stopped and Running.With Option Bytes of STVP: _ UBC[7..0]: 8 bit, choose between 0 and 1 for each bit. _ BOOTLOADER ENABLE: Bootloader Disabled and Boo

Posted on November 04, 2014 at 15:20 Hello, I tried distilling the peripheral library sample on i2c to make it simpler for my own use. However, strangely I cannot get pass a the send address part, and can't figure out why. Can someone give me some direction? Attached is the code I used, and the line with problem is at ''while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) '' inside readRegistry function. Thanks. #include ''stm8l15x.h'' void initI2C(void); uint16_t readRegistry(uint8_t address, uint8_t reg); #define HMC5883_ADDR (0x1E) #define I2C_SPEED 100000 /*!< I2C Speed */ #define I2C_SCL_PIN GPIO_Pin_1 /* PC.01 */ #define I2C_SCL_GPIO_PORT GPIOC /* GPIOC */ #define I2C_SDA_PIN GPIO_Pin_0 /* PC.00 */ #define I2C_SDA_GPIO_PORT GPIOC /* GPIOC */ void main(void) { CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1); enableInterrupts(); initI2C(); readRegistry(HMC5883_ADDR, 4); while (1) { } } void initI2C(void) { GPIO_Init(GPIOC, G

Posted on November 05, 2014 at 23:46I am new-bee for STM8. I was using TI MSP430 before. how can i get some example codes to start getting zest of ST micro

Posted on November 05, 2014 at 05:25Hello, I am interfacing a 24-bit ADC(HX711) with STM8S105 (STM8S discovery board). The intention is to read the weight(mv) from a loadcell(weight sensor) convert it via ADC to counts and display those counts via UART in PC terminal. The excitation voltage for the loadcell is 5V via STM8S discovery board(Vcc pin). The ADC works on a 2 wire serial format comprising of serial clock input(SCK) & serial data output(SDA). SDA is connected to pin 6 of port B(configured as i/p) & SCK is connected to pin 0 of port E(configured as o/p).  Now the terminal is displaying the adc count as 0x7fffff(range is 800000-7fffff) and is constant even when applying load on the loadcell. If anyone has an idea what i could be doing wrong, pls guide. Thanks in advance Rajiv

Posted on September 11, 2014 at 08:20Hello all, I`m having some issues using the double or float datatype in STVD with the COSMIC C compiler. I am able to declare those data types but when i start debugging and would like to watch the varibles, STVD shows weird values. for example the simple division  5.0 / 3.0 resolutes in 1,...E-37 which is something like 0. Using float data type has the same effect. I was using break points and the command 'quick watch'. Dennis

Posted on April 13, 2011 at 19:30STM8L GPIO initialization slow?

Posted on March 06, 2014 at 16:02 Hello, I have 2 pins on the same port B defined to launch interrupt on RISE. When the interrupt is launched, how can I test which pin causes the interrupt launch ? GPIO_Init(GPIOB, GPIO_PIN_5, GPIO_MODE_IN_FL_IT); GPIO_Init(GPIOB, GPIO_PIN_6, GPIO_MODE_IN_FL_IT); EXTI_SetExtIntSensitivity(EXTI_PORT_GPIOB, EXTI_SENSITIVITY_RISE_ONLY); INTERRUPT_HANDLER(EXTI_PORTB_IRQHandler, 4) { if (rise_of_PB5) // how can I test if a rise of PB5 (and not PB6) launches the interrupt ??? { // } if (rise_of_PB6) // how can I test if a rise of PB6 (and not PB5) launches the interrupt ??? { // } } Thanks in advance #input-pin #interrupts #stm8

Posted on October 31, 2014 at 19:22Hello,Do anybody has an example of manchester decoder for stm8 on C? As I understand, I should use a timer interrupts or an EXTI. Thank you.  #stm8 #manchester

Posted on October 29, 2014 at 13:28 I have two STM8 boards. One is master & other is slave. What master does is: send 4 bytes to slave & then read 4 bytes from slave. Problem: Sometimes the cycle work & many times code is stuck. I don't know what exactly is the problem. Master code: /* definition of fast or default standard mode (bus speed up to 400 or 100 kHz) */ #define FAST_I2C_MODE #ifdef FAST_I2C_MODE #define I2C_SPEED 300000 #else #define I2C_SPEED 100000 #endif /* definition of 10-bit or default 7-bit slave address */ /* #define TEN_BITS_ADDRESS */ #define OWN_ADDRESS 0xa0 #define SLAVE_ADD_1 0x30 /* This define is used in master receiver */ /* Uncomment the line below if you want to use the safe procedure */ #define SAFE_PROCEDURE #define BUFFERSIZE 4 volatile uint8_t TxBuffer[BUFFERSIZE]; volatile uint8_t RxBuffer[BUFFERSIZE]; volatile uint8_t NumOfBytes; volatile uint8_t NumByteToRead; volatile uint8_t slave_add; v

Posted on December 21, 2013 at 16:23The STM8/128-EVAL demo firmware provided by ST is broken: It does not correctly enable the output pins for the TX lines. Thus you will never see anything on the USARTs in the adc demos that are supposed to use them. Philipp P.S.: I've put a simple, working USART demo for the STM8/128-EVAL at http://www.colecovision.eu/stuff/stm8/ it repeatedly outputs ''Hello world!'' at 1200 baud, 1 stop bit.