STM8 Assembly Language Programming| stm8s assembly example | stm8s programming tutorial from scratch

learn stm8s programing tutorial from scratch in assembly language programming. After creating a workspace in STVD and selecting the STM8 Assembly toolchain we created a new project. We saw that a large auto generated main.asm stm8 assembly file is auto created which seems very confusing. Just remove all that and paste following code which will write zero on Portb B pin 5 or PB5 which is the 11th pin of STM8S103F3P Microcontroller.

Same code is also applicable for STM8S003F3P Microcontroller. So it doesn't matter whether you have which part in your microcontroller just make sure to view the correct address of registers PB_DDR and PB_ODR.

Here are two files link we used in this tutorial

Reference Manual of STM8S :
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https://www.st.com/resource/en/reference_manual/cd00190271-stm8s-series-and-stm8af-series-8-bit-microcontrollers-stmicroelectronics.pdf


Datasheet for STM8S103
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https://www.st.com/resource/en/datasheet/stm8s103f2.pdf

Creating ASM Project for stm8s in STVD
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http://www.fypsolutions.com/tutorials/stm8-assembly-language-hello-world/


Here is full code used in this tutorial:
=================================


stm8/
#include "mapping.inc"
segment 'rom'
;==============================
;--------------------------------
PB_DDR EQU $5007
PB_CR1 EQU $5008
PB_ODR EQU $5005
;---------------------------------
BSET PB_DDR,#5 ;FORCE PB_DDR,5=1; OUTPUT
BSET PB_CR1,#5
MAIN
BRES PB_ODR,#5
JRA MAIN
;==============================
end
;=============================================

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