Getting to Blink on a STM32 Nucleo F103RB using STM32CubeMX, Make and GCC
Prerequisites
- Install STM32CubeMX
- Install arm-none-eabi-gcc
Makefile
Start by creating a directory and copy my Makefile into it.
project.mk
Create a file called project.mk
in the root of your new directory with the following content:
USER_CFLAGS =
SRCS = src/main.c
SSRCS =
This file tells the Makefile where your source files are.
STM32CubeMX
Create a new project in STM32CubeMX that matches your Nucleo board.
Create a more friendly name for your LED pin. Right click PA5 (LD2 [Green Led])
, select Enter User Label
, and enter MYLED
.
Save the STM32CubeMX project into your directory.
main.c
Create a file called src/main.c
with the following content:
#include <pinout.h> // generated by Makefile to build/pinout.h
volatile GPIO_PinState lastState;
void sleep_ms(uint32_t ms);
void sleep_us(uint32_t us);
void setup() {
lastState = GPIO_PIN_RESET;
}
void loop() {
GPIO_PinState newState = lastState == GPIO_PIN_RESET ? GPIO_PIN_SET : GPIO_PIN_RESET;
HAL_GPIO_WritePin(PIN_MYLED_PORT, PIN_MYLED_PIN, newState);
lastState = newState;
sleep_ms(500);
}
void sleep_ms(uint32_t ms) {
volatile uint32_t i;
for (i = ms; i != 0; i--) {
sleep_us(1000);
}
}
void sleep_us(uint32_t us) {
volatile uint32_t i;
for (i = ((SystemCoreClock / 8000000) * us); i != 0; i--) {}
}
Similar to an Arduino there is a setup
function which gets called when the program starts. There is also a loop
function which gets continuouly called until the power is turned off.
Flash your Nucleo
After you plug your Nucleo board in, run make write
. You should now see the green LED flash.
Additional Help
To get additional help run make help
.
You can find the example project and Makefile here.
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