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Questions tagged [stm8]

The STM8 is an 8-bit microcontroller by STMicroelectronics.

76 questions
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STM8 ASM safely execute WFE

I have c code runned from RAM in low power run mode (so interrupt are no handled). This mode enabled by code sequence: jump to RAM SIM switch off internal flash, and power regulator, switch to low speed clock source (LSE) do some work with WFE mode…
imbearr
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Programing STM32 like STM8 (register-level GPIO)

I programmed STM8 GPIO like PD_ODR_ODR4 = 1;, but stm32f10x.h doesn't have this function. Is there any .h file that has definition for bits? Sorry, but I don't know how to explain this problem better. I tried multiple GPIO libraries.
jurgis1991
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Unable to send data with I2C using STM8s in C [Solved]

I'm an engineering student and for my bachelor thesis I use a 16 channel IO expander which communicates with I2C with a STM8S microcontroller. IDE: STVD (I set the correct ARF6 byte) IO-ex: PCA8575 -> datasheet:…
Joerie
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Why is the array size unknown?

I tried to program this code on an STM8 Controller: #include "Imagedata.h" void main(void) { unsigned char *pArray; pArray=IMAGE_DATA; while(pArray<=(IMAGE_DATA+(sizeof(IMAGE_DATA)/sizeof(pArray)))) { …
user20560622
2
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1 answer

STM Assembly instruction set to reserve data location respectivly, like PIC Assembly "ORG","RES"

I am working on STM8S microcontroller, and I need to reserve absolute data locations for my variables via using assembly. So, I try to "LD" instructions but I couldn't. In PIC assembly I have a part of code like this: ORG 0X40 ; origin…
mryldz
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Understanding STM8 pipelining

I’m trying to understand STM8 pipelining to be able to predict how much cycles my code will need. I have this example, where I toggle a GPIO pin for 4 cycles each. Iff loop is aligned at 4byte-boundary + 3, the pin stays active for 5 cycles (i.e.…
rumpel
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1 answer

Placing variables in absolute memory location (IAR C/C++)

I am working on an STM8S microcontroller with the IAR Compiler. How can I fix the start location for more then one variable using a pragma or another method? When I try the below code, the compiler gives this error message: Error[Lp025]: absolute…
mryldz
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IAR Embedded Workbench. Where is __iar_program_start?

In the code for a STM8 application there is a line extern void __iar_program_start(void); now I've searched and this function is nowhere to be found. What is this and where is located??
KansaiRobot
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is there a HAL_SPI_transmit function in stm8?

I'm trying to write a stm32 code in stm8. The problem is I can't find a SPI_Transmit function only SPI_SendData. I need this function to transmit an array through SPI. The stm32 SPI_transmit function looks like this: HAL_StatusTypeDef…
user20560622
1
vote
1 answer

[C]unrecognized token "@address" on VScode

I'm using cosmic compiler for stm8 microcontroller. It supports "@" pointers or modifiers. such like @
@far @near @tiny @interrupt @inline //etc.. Cosmic compiler user guide VScode cannot recognize those modifiers and shows red underline…
Jeff Sim
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STM8 default EEPROM values COSMIC compiler

I'm developing a program using COSMIC 'C' compiler Ver 4.5.3 for STM8 CPU (STM8S003K3) and I want fill the MCU EEPROM with default values during mass production using ST-LINK/V2 device. In the Manual I read that I have to use the #pragma directive…
Ferrari
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STM8 as SPI slave can't send back data

I have build a prototype board with a STM8L, and I want it to be used and configured as a SPI slave. I am testing it with a raspberry pi as master. I use the lib provided by ST called "STM8 Standard Peripherals Library" for this, but the…
Matio
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How to Convert the last digit of a number to a char and display it on LCD?

I recently got a STM8 MCU and it has the built in function LCD_GLASS_DisplayString("STRING") The problem with that function is, as you can see below, that I cannot directly display an integer on it: void LCD_GLASS_DisplayString(uint8_t* ptr) { …
rajeev
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How to link denser code in IAR in split sections?

I make the program for STM8L151G6 on IAR Embedded Workbench for STM8 (version 3.11.1) I need to place the instruction JPF 0xf000 at 0x008426 address. I do this. In C code: __root static const uint8_t jpfat0x8426 [] @ "ENTRY_POINT" = {0xac, 0x00,…
Ivan167
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Dump the firmware from an STM8 microcontroller

I have a 600W digital step up converter with broken STM8S103K3T6C and another that is currently working OK. Is there a way to copy (dump) firmware from the working one and upload it to the new chip. Since I have only one working, I have to be extra…
Alex
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