STM32F4

Creating custom header files for the stm32f4. Aim to create a pid controller at last. The stm32f4 is development board with Arm Cortex-M4 arhitecture. It is 32 bit a proccesor. The STM32F4 has multiple adcs, timers, clocks, a dac, and much more.

Current Status

• Mostly all neccessary header files done except stm32f407_pwm.h
• Under Development: debbuging the PWM
• PID controller : the next thing after PWM

Prequistes

• To flash code on board - openocd
• Arm 32 bit compiler - arm-none-eabi-gcc
• nostdlib
• For checking code and debugging - readelf
• For debugging - arm-none-eabi-gdb
• For usart - coolTerm(for mac), minicom
• Can be downloaded for linux and mac from HomeBrew

Using the Library

Caution: while using library global variables can't be used.

• While using the library main() function has to be replaced by start()

int start() {                   // has to be always int
  ...
}

Will write the documentation for each library soon

Running the Code !

• Manually running the code

 arm-none-eabi-gcc -g -Tstart.ld -mcpu=cortex-m4 -mthumb -mtune=cortex-m4 -fbuiltin -ffreestanding -nostdlib <example.c> include/stm32f407_gpio.c include/stm32f407_adc.c include/stm32f407_dac.c include/stm32f407_usart.c include/stm32f407_pwm.c -o main.elf

• Using the Makefile

make <command> // refer to Makefile at https://github.com/vtarale/STM32F4/blob/main/src/Makefile

References

RM0090 Reference manual
STM32F407 Datasheet
Fundamentals of System-on-Chip Design on Arm Cortex-M Microcontrollers

Lisence

MIT