helloworld.md

Getting "Hello World !" with basic SooL

Summary

1. Requirements
2. Getting "Hello World !"

Requirements

• Having a proper C++ (11+) toolchain such as STM32CubeIDE.
• Having downloaded the SooL library

Hello world !

This is the example using a STM32F303k8 Nucleo board. It enable the USART, setup the baudrate at 9600 (8N1) and send the mighty Hello World or whatever message you want.

To use the send function you have to use a null terminated string (or C-Style string).

#include "system/include/system_stm32.h"
#include "sool_setup.h"
#include "include/GPIO.h"
#include "include/USART.h"

int main()
{
	using namespace sool::core;
	GPIOB->enable_clock();
	GPIOA->enable_clock();
	PB3 = GPIO::Mode::Output;
	PA2 = GPIO::Mode::AlternateFunction | GPIO::AF::AF7;
	
	// For Rx
	// PA15= GPIO::Mode::AlternateFunction | GPIO::AF::AF7;

	USART2->enable_clock();
	USART2->BRR = 833;
	USART2->CR1.TE = 1;
	// USART2->CR1.RE = 1;
	USART2->CR1.UE = 1;

	char msg[] = "Hello World !\r\n\0";
	
	while(1)
	{
		USART2->send(msg);

		for(int i = 0; i < 50000; i++)
		    asm("nop");
	}

	return 0;
}