/**
  ******************************************************************************
  * @file    main.c
  * @author  Auto-generated by STM32CubeIDE
  * @version V1.0
  * @brief   Default main function.
  ******************************************************************************
*/



#include <stdio.h>
#include <stdlib.h>
#include "uart_driver.h"

#define F_CPU 16000000UL

#define ARSIZE  10

main(){
	init_usart2(57600,F_CPU);
	int ch_arr[ARSIZE],count1;
	int count2, stop, lastchar;

	lastchar = 0;
	stop = 0;
	/*
 	 * Read characters into array.
 	 * Stop if end of line, or array full.
 	 */
	while(stop != 1){
		ch_arr[lastchar] = getchar();
		if(ch_arr[lastchar] == '\n')
				stop = 1;
		else
				lastchar = lastchar + 1;
		if(lastchar == ARSIZE)
			stop = 1;
	}lastchar = lastchar-1;
	/*
 	 * Now the traditional bubble sort.
 	 */
	count1 = 0;
	while(count1 < lastchar){
		count2 = count1 + 1;
			while(count2 <= lastchar){
				if(ch_arr[count1] > ch_arr[count2]){
				/* swap */
				int temp;
				temp = ch_arr[count1];
				ch_arr[count1] = ch_arr[count2];
				ch_arr[count2] = temp;
			}
			count2 = count2 + 1;
		}
		count1 = count1 + 1;
	}

	count1 = 0;
	while(count1 <= lastchar){
		printf("%c\n", ch_arr[count1]);
		count1 = count1 + 1;
	}
	exit(EXIT_SUCCESS);
}