STM8 MCUs

Hi all,I am trying to read temperature data from MAX31855K over SPI, using STM8S103F3 on a breakout board.Development set up is STVD, STVP and Consmic compiler. And using STM8S Standard Peripheral library.Here is my max31855.h:#ifndef MAX31855_H #define MAX31855_H   #define MAX31855_SPI_GPIO_PORT GPIOC #define MAX31855_SPI_SCK_PIN GPIO_PIN_5 #define MAX31855_SPI_MISO_PIN GPIO_PIN_7 #define MAX31855_NCS_GPIO_PORT GPIOA /* Chip Select I/O definition */ #define MAX31855_NCS_PIN GPIO_PIN_3     #ifdef USE_Delay #include "main.h"   #define _delay_ Delay /* !< User can provide more timing precise _delay_ function (with at least 1ms time base), using Timer for example */ #else #define _delay_ delay /* !< Default _delay_ function with less precise timing */ #endif     #define MAX31855_CONVERSION_POWER_UP_TIME 200 //in milliseconds   #define MAX31855_SELECT() GPIO_WriteLow(MAX31855_NCS_GPIO_P

hello siri use the i2c bus on a stm8s208.there is just connected 2 pcf8574.the crystal i used is 8Mhz, and a i2c clock divider of 4one pcf8574 is connected to dipswitched , adress is 42the second pcf8574 is connected to led's, adress is 40individualy its working. both.so i can read, the switches, and i can send information so the leds are lighting up.even i read first the switches and then i go to the led sending routine ,and put then a 'break" in the stv development its still ok.but, now, if i jump back to read the switches, , i can't read my switches, its stops in the "pcf8574 start routine" of the led's.another information, the same board, the same adressing, id working with the arduino i2c bus.so,my board is "functionaly" ok.send the file in addembler here with can you tell me or give me some clues,what i did wrong in the programmingmany thanksmarc debruyne

I would like to receive a string through the UART1, its format is from 000000000 to 999999999, However when I send the string only the first object is read and it is repeated nine times and the other values are lost.I am using this function to read the data from UARTvoid Serial_read_char(uint8_t * buf, uint8_t numberOfBytes) { buf[pos] = UART1_ReceiveData8(); UART1_ClearITPendingBit(UART1_IT_RXNE); UART1_ClearFlag(UART1_FLAG_RXNE); pos++; if(pos > numberOfBytes) { pos = 0; } }And this is how I am storing the data in the main function if (UART1_GetFlagStatus(UART1_FLAG_RXNE) == TRUE) { Serial_read_char(buf, 9); delay_ms(1); get_lux = (*(buf+0) - 0x30)*100+ (*(buf+1) - 0x30)*10 + (*(buf+2) - 0x30); get_warm =(*(buf+3) - 0x30)*100+ (*(buf+4) - 0x30)*10 + (*(buf+5) - 0x30); get_cool =(*(buf+6) - 0x30)

Hi. I'm using a STM8AF6226TDSSS chip. I can't find the specific model number on the website.STVP set STM8AF6226TxSSS as a different device apart from STM8AF6226. So what's the difference? Is the datasheet applicable?

I am using a stm8s103f which has 8K flash. My project compiles fine using the cosmic compiler. I get a map that looks like this .start 00008080 end 00008080 length 0 segment .const start 000080a1 end 00008924 length 2179 segment .text start 00004000 end 00004000 length 0 segment .eeprom start 00000000 end 00000019 length 25 segment .bsct, initialized start 00008088 end 000080a1 length 25 segment .bsct, from start 00000019 end 000000b9 length 160 segment .ubsct start 000000b9 end 000000b9 length 0 segment .bit start 000000b9 end 000000b9 length 0 segment .share start 00000100 end 00000100 length 0 segment .data start 00000100 end 00000100 length 0 segment .bss start 00000000 end 0000074e length 1870 segment .info. start 00000000 end 00001a11 length 6673 segment .debug start 00008000 end 00008080 length 128 segment .const start 00008080 end 00008088 length 8 segment .initWhen I try to add a large constant array with const u16

ic STM8L052C6, Programmer ST Visual developer, ST Visual programmer and writing through ST LINK V2

Posted on January 14, 2018 at 09:04 Hi All, I am new to STM8S and not yet that good at microcontroller programming in general. I am trying to learn about timers/counters in microcontrollers. I wrote following code to toggle an LED connected at PB5 pin in each second. #include 'stm8s.h' int main() { // Default clock is HSI/8 = 2MHz PB_DDR |= (1 << PB5); // PB5 is now output PB_CR1 |= (1 << PB5); // PB5 is now pushpull TIM2_PSCR = 0b00000111; // Prescaler = 128 TIM2_CR1 |= (1 << TIM2_CR1_CEN); // Enable TIM2 while (1) { if ( ( ((uint16_t)TIM2_CNTRH << 8) + (uint16_t)TIM2_CNTRL ) >= 15625 ) { // Reset counter back to 0 TIM2_CNTRH = 0; TIM2_CNTRL = 0; // Toggle LED. PB_ODR ^= (1 << PB5); } } }�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�? My microcontroller is not connected with any external clock and using internal clock to operate. After I reading datasheet, I se

Determine FLASH areaDue to its file extension (or lack thereof), "C:\Users\HARISH~1\AppData\Local\Temp\arduino_build_202135/DigitalInputPullup.ino.hex" is considered as INTEL HEX format!2596 bytes at 0x8000... Tries exceededAn error occurred while uploading the sketchcan anyone have an idea regarding this,kindly help me outthank you in advance

I have an STM8S00f3p6 controller I was able to do the external interrupt and do the GPIO operations in the interrupt.Now my requirement is like after getting the inerrupt I need to make two GPIOS high for some seconds and make them down after time expires.I need help on this how to do the timer operation here.Other than timer any way is there also fine.RegardsSrikanth.

I have downloaded and installed the cosmic(CXSTM8).I have tried to compile the code,but that time I have faced the license error. Please find the attachment .kindly help me out.

1. I have to read/write NAU7802 register, datasheet of which is attched.2. STM8S is running at 16Mhz.3. Write three functions:a) i2c_init() : init the i2c peripheralb) i2c_read_one_byte_data() : read from address of NAU7802 and read only one bytec) i2c_write_data() : write buffer to NAU7802 to register specified4. I am trying to read the registers of NAU7802 which return constant values, by i always gets error. What could be wrong in code?#define I2C_TIMEOUT 10000 //this is not exact timing, just a counter   #define I2C_SPEED 100000 #define I2C_SLAVE_ADDRESS7 0x2A //this is random not to be used actually, STM8S used in master mode #define NAU7802_ADD 0x54 //this is address of NAU7802, 8 bit address, last bit will be R/W       void i2c_init(void) { /* I2C Peripheral Disable */ I2C_Cmd(DISABLE); /* I2C DeInit */ I2C_DeInit(); /* I2C Peripheral clock disable */

I need a clock signal for my hardware that occurs in the middle of each uart tx bit. But I don't want the synchronous mode behavior where receives are based on transmits. I want receives to start when start bits are received on the uart rx pin, which may be in the middle of a transmit byte.I don't see how to set this up since there is a control bit for the tx clock but I don't see a separate control bit for sync mode.If this isn't possible then I will set up a timer pwm with a period equal to a bit width and reset the counter when I start a transmission. This will be dependent on clearing the counter at precisely the right time in sw, which may be hard to do.Any ideas?

HiI need to migrate my working STM8S003F3P6 code (working correctly for a year now) to a new STM8L051F3 chip.(The code is SDCC compiled and bit banged with direct register modification. I do not use the SPL) I run an interrupt at 125Hz on Timer2 in the STM8S chip that is not taking place in the Timer4 in the STM8L chip . I've set the peripheral clock ON as an extra step in the STML, but am not sure if there is any other step I'm missing. Your advise, suggestions and pointers are very much appreciated.This is my TIM2 initialization code in the STM8S cpu that runs:  /* Prescaler = 256 */  TIM2_PSCR = 0b00001001; //prescaler for TIM2  /* Frequency = F_CLK / (2 * prescaler * (1 + ARR))   *      = 16 MHz / (2 * 256 * (1 + 1952)) = 8 Hz */  TIM2_ARRH = 0x0f; /The ARR value for 16MHz clk to TIM2 TIM2_AR

I would like to use swim pin on my stm8s000f3 to drive an led. I've set up the circuit so the swim pin goes to the gate of a fet that drives the led. This makes sure the led circuit doesn't affect the swim pin during debugging. I would like to enable the swim pin as an output to drive the led when I'm not debugging. It would be nice if my software could automatically know when it is safe to make the swim pin an output, i.e. when the rt-link isn't connected. I would prefer this to changing the code when not debugging which would be a pita.I thought of maybe trying to drive the pin low and high and checking to see if the level changes. But I don't know if the rt-link always drives the pin while connected.Any ideas in general about making it easy to know when swim can be an output?

I am using STM8L152R6T6 and STM8L052C6 for my project. The code wakes up from active-halt mode by RTC wake up interrupt. There is some LCD display memory (LCD_RAM) updates in RTC wake up interrupt routine. The CPU executes this update function and some other functions. And after goes to active-halt mode again. Although the CPU executes update function, there is not any change on display or LCD registers when i look in debug.If I reduce system clock speed by using clock divider, problem doesn't occured. And also, when I added to code some dummy delay, this is solving the problem. BTW, I am using HSI (16 MHz)I want to solve this problem officially, not by putting dummy delay to the code or reduce system clock speed. For instance wait for a flag.Do you have any idea, or solution about this problem?You can see and analyze the demo code in attachment.

I am using STM8AF6288TC and I face Error on Option bytes (Complementary bytes). Reprogram option bytes of device, Error Some times, I reprogram option bytes :- 1.In ROP select read out protection ON.     2.Then program current tab only.3. Now again in ROP select read out protection OFF.4. program current tab. After that ECU recovers from this problem.But what is the reason behind this error 1. Is STVP causes this error ?  (I am using STVP 3.4.1 . I am using IAR Also for debug mode. )2. Is code causes this error ?part of my code where I modify option bytes : /* write unlock keys */ FLASH->DUKR = 0xAE; FLASH->DUKR = 0x56; /* Check for write protection has been disabled * by writing the correct MASS keys */  while(FALSE ==((FLASH->IAPSR)&(FLASH_IAPSR_DUL)))&

Hi ;I am having a confussion on how to set the interrupt priority of a desired peripheral . I am using IAR IDE version 3.11.1 and the MCU is STM8S103F3F6 . I need to know which interrupt table IRQ number I should take account to configure the interrupt priority . The vector numbers listed in ST's manuals for STM8 are offset by 2 compared to the vector numbers used by EWSTM8. In this case which table should I take account to set the interrupt priority of TIM1 Overflow update interrupt ? Should I set the VECT13SPR or VECT11SPR ? Here is the code line in iostm8s103f3.h#define TIM1_OVR_UIF_vector 13 /* IRQ No. in STM8 manual: 11 */Regards .

Function ADC2_ConversionConfig do three steps:sets ADC result alignenable/disable continuous conversion (there will be problem, unrelated to Continuous mode)writes desired channel into ADC2->CSR (there will be another problem)but if that function is called with enabled ADC (ADON=1), it suprisingly start conversion because of clearing CONT bit in ADC2->CR1 (any write into ADC2->CR1 with ADON bit set starts conversion). Because of this behaviour, function cannot be used to change channel while ADC is ON.Also in step 3. is problematic. Changing channel selection is done in two steps (clear bits CH[3..0] and next write desired value). This means that for short period of time is AIN0 selected as ADC input and if that GPIO serves for exaple as output, it typicaly leads to realy bad situations ... (output becomes input absolutelny unexpectedly).Tested at STM8S208 (Nucleo) with Standard Peripherals Libra

Hello EveryoneI use STM8L001J3P6 in my project. I want to use timer 3 on compare mode but I dont write any value timer3 register. I write 129 (TIM3_CR1=129;) but register value is zero. Anyone can solve this problem?Thanks.

Hi. I'm using the STVD IDE with Cosmic with an STM8TL52F4 MCU with the 'Minimize Code Size' compiler option selected. Under Debug instrument->ICD MCU configuration->Options, I set the DATASIZE_bit6 Value to 1 (the other DATASIZE bits are 0) and made no other changes there. As I understand it, that should reserve a 1024 byte window in EEPROM for my permanent (power-up to power-up) settings info starting at address 0x0800. I'm able to UNLOCK, write and read that area and LOCK it again without problems. However, with each debug session, I find that the area is always overwritten. How do I prevent that and keep that area secure? And I'm curious what it's being overwritten WITH?

I am using STVD on a Win10 and when I want to debug a program on a MCU. When the read out protection is set the pop up window named "ICU MCD configuration" showes up. There used to be two tabs where one was showing the option bytes where you could reset the read out protection. The window is even shown in the documentation under "6.1.4 Configuring option byte settings". As of now the tab is missing and i have to use the seperate programmer every time to reset the ROP.Window as seen in the documentation.

Hello! I am using STM8L051F3 with Stm8 SPL headers. I am trying to configure PC0,PC1,PC4 as output with high level:CLK->PCKENR1 &= `CLK_PCKENR1_I2C1; GPIOC->DDR |= (1<<0)|(1<<1)|(1<<4); GPIOC->CR1 |= (1<<0)|(1<<1)|(1<<4); GPIOC->ODR |= (1<<0)|(1<<1)|(1<<4);as a result, i got high level only on PC4.According to DS1178 Rev4 ( STM8L051f3 datasheet) p.23 PC0 and PC1 has main function as PORT and alternate function as I2C. I think, that somehow PC1 and PC0 acts as I2C (SDA/SDL) Please help me to configure PC0 and PC1 as ordinary port.

Hi All,I want to know how i can declare any RAM variable as volatile in STM8 assembly language. I have one variable, which is shared between ISR and main function. It is causing issue during updates, when the software is in free run mode.Can anyone tell me that how to declare any variable as volatile in STM8 assembly.