STM8 MCUs

Hi,I would like to protect my GPIOs from ISO7637-3 pulses with a rail to rail diode solution. But I have seen that the GPIOs already have a intern rail to rail protection with a forward voltage Vf_int = 0.6V (Datasheet Fig. 43). To protect my GPIOs with a extern circuitry the Vf_ext has to be lower than Vf_int, is that right?Kind regardsTom

Hi,I want to read more than one byte of data from slave device. I am using STM8AF family micrcontroller in master mode and pressure sensor is a slave device. Master will send command which is of 1-byte to read data from slave device. And slave will respond 2-bytes of data. So while sending command do i need to send command of 2-byte ?

Map file:BYTES ; The following addresses are 8 bits long segment byte at 0-ff 'ram0' WORDS ; The following addresses are 16 bits long segment byte at 100-1ff 'ram1' WORDS ; The following addresses are 16 bits long segment byte at 200-3ff 'stack' WORDS ; The following addresses are 16 bits long segment byte at 4000-427F 'eeprom' WORDS ; The following addresses are 16 bits long segment byte at 8080-8FFF 'rom' WORDS ; The following addresses are 16 bits long segment byte at 8000-807F 'vectit'Source file:stm8/ #include "mapping.inc"   segment 'rom'.main: ; sample code CPL A end

void sEE_ReadBuffer(uint8_t* pBuffer, uint16_t ReadAddr, uint16_t* NumByteToRead) { //__IO uint32_t timeout = 0xFFFF; __IO uint32_t timeout = 0xf00; /*!< Wait the end of last communication */ for (;timeout > 0; timeout--);   /* Set the pointer to the Number of data to be read. This pointer will be used by the DMA Transfer Complete interrupt Handler in order to reset the variable to 0. User should check on this variable in order to know if the DMA transfer has been completed or not. */ sEEDataReadPointer = NumByteToRead;   /*!< While the bus is busy */ while (I2C_GetFlagStatus(sEE_I2C, I2C_FLAG_BUSY)) {}   /*!< Send START condition */ I2C_GenerateSTART(sEE_I2C, ENABLE);   /*!< Test on EV5 and clear it */ while (!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_MODE_SELECT)) {}     }

hello,i use IAR EW for STM8 3.11.1(latest version on IAR website)​but i can't find STM8L050J3M3 Model at "General Options - Target - Device"so.. which one should i choose?Thank you.bast regards.Device : STM8L050J3M3 C Compiler : IAR EW for STM8 3.11.1

Hi,STM8L152 with buttons and LCD, using CR2032 battery. Most of time MCU is in Active-halt mode and keep LCD display. Now I want PVD low voltage interrupt to inform user to change battery in LCD.​So my question is, can PVD interrupt work in active-halt mode? And how to do it properly?I notice setting PWR_CSR2_ULP bit will disable Vrefint(for PVD and others) in Active/Halt mode, So this bit can't be set and bring extra power consumption in Active-halt mode, am I right?Yong

stm8L152 PC2 is USART rx,1 rx to exit before halt() USART_DeInit(USART1); GPIO_Init(GPIOC, GPIO_Pin_3, GPIO_Mode_Out_PP_Low_Slow); GPIO_Init(GPIOC, GPIO_Pin_2, GPIO_Mode_In_PU_IT); RX_EXTI_setup(); EXTI_ClearITPendingBit(EXTI_IT_Pin2);2, pc2 exit handlerINTERRUPT_HANDLER(EXTI2_IRQHandler,10) { /* In order to detect unexpected events during development, it is recommended to set a breakpoint on the following instruction. */ //stop_flag = 1; EXTI_ClearITPendingBit(EXTI_IT_Pin2); //GPIO_Init(GPIOC, GPIO_Pin_2, GPIO_Mode_In_PU_No_IT); // 1230 change GPIOC->CR2 &= (uint8_t)~GPIO_Pin_2; //write_usb_flag(); FLASH_Unlock(FLASH_MemType_Data); //FLASH_EraseByte(0x1000); //delay_ms(20);   FLASH_ProgramByte(0x1000, 0x66); record_time_f = 1; // to record time //write_addr FLASH_ProgramByte(0x1002, (uint8_t)(write_addr & 0xff)); FLASH_ProgramByte(0x1003, (write_addr >

hardware I2C: my stm8l152 have two i2c slave device, it works well when does not connect to a oscilloscope.when connect to oscilloscope, mcu may be stop i think oscilloscope has effect on i2c, I2C communicate by polling

hello,i'm studying the STM8L050j3M3.but i don't understand how to connect STM8L050j3M3 and ST link.​it don't have Reset pin. and i don't be going to buy discovery board because i use 1 LED and Timer.​i'd like to make connection mentioned above.could you help this ​situation?​STM8L050J3M3 -pin1 : SWIMpin3 : VSSpin4 : VDDThank you.Best regards.

I am using the STM8S208RB.I would like to fix for #error clnk Release\vdp650.lkf:1 segment .ubsct size overflow (147).Please help me

we are putting theController in halt mode after configuring a external interrupt to wakeup. We read in datasheet, halt mode current is 440na. But we are getting current in terms of ( 1ma - 2 ma). Sometimes getting 200ua. It keeps varying. We want halt mode current to be less than 70ua.STEPs followed below calling halt()*        Switch clock from HSI to LSI Low frequency*        Clear external interrupt flags EXTI->SR1 = 0x00; EXTI->SR2 =0x00;*        Switch off all peripherals CLK->PCKENR1 = 0x00;CLK->PCKENR2 = 0x00; CLK->PCKENR3 = 0x00;                    *        Configuring FLASH register also . (PWR->C

Hi All.I have installed STVD version 4.3.12 on OS - WINDOWS 10  version 1803 with following detailsSTVD MainFrame Version 3.6.5.2 - Build Aug 4 2017stvabbld.dll, Version: 1.4.1.0stv7abbld.dll, Version: 1.4.4.1STVD_TxtEditor.dll, Version: 1.0.3.0and received this error, but after referring en.CD00146550.pdf page no13 I followed following instructions "On some systems, the DAO-3.5 objects, required by Swim and STice targets, are not correctly installed. As a result, this error is displayed: ‘[40201]: can't access configuration database’, when starting to debug on those targets. A first workaround consists in running with administrator privileges the package /stvd/dao/ST Toolset.msi (where is typically ‘C:/Program Files/STMicroelectronics/st_toolset’ on 32 bits systems and ‘C:/Program Files (x86)/STMicroelectronics/st_toolset’ on 64 bits systems). If the issue persists afterwards, run both following command

Hello,I stated using the STM8f003 uC.For simple start I want to implement a flashing LED using the TIMER1 overflow interruptof the core. The code does compile and can be flash without problems.Sadly the LED never lights up -> the interrupt is not even triggered once.Does somebody have an idea?Thanks :)#include "stm8.h" #define F_CPU 1000000 #define PRE_SCALE 0xF42400   void timer_isr() __interrupt(11){ PD_ODR = 0xff; TIM1_SR1 &= ~(1 << TIM_SR1_UIF); // Clear interrupt flag }   void main(){ CLK_PCKENR1 = (1<<7); TIM1_PSCRH = 0; TIM1_PSCRL = 15; TIM1_IER = TIM_IER_UIE; TIM1_CR1 = TIM_CR1_CEN; __asm__("rim"); PD_DDR = 0xff; PD_CR1 = 0xff; PD_ODR = 0x00;   while(1); }

I2C_Cmd(sEE_I2C, ENABLE); /* sEE_I2C configuration after enabling it */ I2C_Init(sEE_I2C, I2C_SPEED, I2C_SLAVE_ADDRESS7, I2C_Mode_I2C, I2C_DutyCycle_2, I2C_Ack_Enable, I2C_AcknowledgedAddress_7bit);do the init order have some problem? below one is common:void Init(void)   {   I2C_DeInit(I2C1); I2C_Init(I2C1,IICSPEED, host_address, I2C_Mode_I2C,I2C_DutyCycle_2, I2C_Ack_Enable, I2C_AcknowledgedAddress_7bit); I2C_Cmd(I2C1,ENABLE); }I2C_Cmd(sEE_I2C, ENABLE); I2C_DeInit(sEE_I2C); /* sEE_I2C configuration after enabling it */ I2C_Init(sEE_I2C, I2C_SPEED, I2C_SLAVE_ADDRESS7, I2C_Mode_I2C, I2C_DutyCycle_2, I2C_Ack_Enable, I2C_AcknowledgedAddress_7bit);is there some bug like above

ST Visual Develophow to debug under halt mode?it seems the debugger will lost communication

GPIO_Init(GPIOE, GPIO_Pin_7, GPIO_Mode_In_PU_No_IT); ?is there a standard method?

Hello,​I'm designing a new board with a STM8 CPU.Before, I'm doing a several previous tests.​I want to supply with 3.3V the MCU but I found that it works very well with 5V but in the other hand with 3.3V it doesn't work.​I checked VCAP voltage, while supplied with 5V I measured right value, 1.8V (core voltage) but if I down the power below 4V the voltage at this pin drops to 0V and, therefore, it doesn't work.​The datasheet states voltage can be from 2.95V to over 5V.​Any idea?​Thank you.​

Hello,I tried to program STM8S001J3 using STLinkv2 Debugger and ST Visual Programmer (STVP).As the STM8S001J3 MCU had no RESET pin, I left RESET pin of ST Linkv2 unconnected and just connected 3 lines of ST Linkv2 (VDD, GND, SWIM) with corresponding pins of the MCU.However, when I clicked the programming tab (the red arrow one) in STVP, the message that it could not communicate with the device popped up as shown in attached file. It still didn't work when I opened '3op16icp.s19' and then programmed.I had to use I2C, USART, and SWIM so on my PCB I connected USART_TX and SWIM on the same 8 pin, because I found out that if I give time delay before converting 8 pin into USART_TX I can still access it to SWIM pin beforehand.I worried that if unconnected reset pin might cause problem so I tried it to connect whether ground or VCC, but it still didn't work.Can you tell me what the problem is with my

Can the ST-Link V3 SET program flash standalone (without PC)?As Flasher STM8 's standalone mode.(https://www.segger.com/products/production/flasher-st/models/flasher-stm8/)-----> https://www.st.com/ja/development-tools/stlink-v3set.html> The STLINK-V3SET is a modular stand-alone debugging and programming probe for the STM8 and STM32 microcontrollers.Thanks for your answer.I found that"stand-alone" was not "without PC" but "not depend on evaluation board"."programming" was not "flashing" but "coding".

My application uses a STM8AF5288 as SPI slave with hardware Rx and Tx CRC calculator enabled.Despite the information available on the Ref Manuals, just writing '1' to CRCEN bit of SPI_CR2 seems to work only on SPI_RXCRCR.SPI_TXCRCR will not reset with this IF CRCEN WAS ALREADY SET.My workarround was to modify the "SPI_ResetCRC()" function in std lib file "stm8s_spi.c" as follows:void SPI_ResetCRC(void){ /* Rx CRCR & Tx CRCR registers are reset when CRCEN (hardware calculation) bit in SPI_CR2 is written to 1 (enable) */ SPI_CalculateCRCCmd(DISABLE); // by Ferro 2019-12-16 SPI_CalculateCRCCmd(ENABLE); /* Previous function disable the SPI */ SPI_Cmd(ENABLE);} Looks like TXCRC resets with the rising edge...Has anyone gone though this issue?My app is working fine this way, but I'm unconfortable with assuming the std lib

I would like to develop an application with the STM8L001J3M3 microcontroller.The UM2339 user manual for the Discovery Kit indicates that demonstration software is available at www.st.com/stm8-discovery web page. I cannot find any library or demonstration software at this URL.I have downloaded STM8CubeMX. There is no support for the Discovery board.Where do I find the library files and demonstration software to support the STM8L001J3M3 microcontroller?Thank you,Max

Hello, I use ST-LINK to set Option Bytes in uC ST8AF6246. IDE is IAR.I have a trouble with Option Bit HSITRIM (Old name 16MHZTRIM0). According to uC datasheet this bit allows oscillator trimming with 3 or 4 bit resolution (One bit for sign). ST-LINK does not see this bit! How could I set this bit ? I have read out OPT3 byte, this is 0xF0, NOPT3 is 0x0F.Does it mean that this bit (#4) is set already? Or this bit is not available in uC?Best Regards

void main(void) { clock_setup(); GPIO_Config(); CLK->ICKCR |= 0x10;//SAHALT; //0.03ma CLK_HaltConfig(CLK_Halt_FastWakeup,ENABLE); FLASH_PowerWaitModeConfig(FLASH_Power_IDDQ); PWR_UltraLowPowerCmd(ENABLE); // no diff FLASH_PowerWaitModeConfig(FLASH_Power_IDDQ);//no diff disableInterrupts(); //no diff   halt(); while(1) { //halt(); }i have try using stvd to develope stml052R8while i am using the halt mode to make it in the LOWest power consumption mode, however, i measure the current there 's still 0.08ma ...can anyone suggest or pinpointing my problem?thanksJeff

Hello,  We had recently purchased ST-LINK/V2 Debugging and programming STM8 and STM32 microcontroller Tool and   also installed ST Visual Programmer software in WINDOWS 7 PC. In our target board we are using STM8L101x3.  we are not able to communicate when we try to read the program. The error msg is captured in the attached doc. And same process we tried on 2 windows 7 pc’s and 2 working target boards also so can you please help out of this problem.

Posted on May 12, 2015 at 15:57Hi,I had downloaded ''Cosmic STM8 32K Special Edition '' and had registered in: '' http://www.cosmic-software.com/download.php'' at bottom, i still didn't received the license file, what may be the problem?thanks for help.