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main.c
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1/******************************************************************************
2 @copyright Copyright © 2022 by Jason Duffy.
3
4 Permission is hereby granted, free of charge, to any person obtaining a copy
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22
23/**
24 * @file main.c
25 * @ingroup usart
26 * @author Jason Duffy
27 * @date 15th March 2022
28 * @brief Example main routine demonstrating the USART driver.
29 * @bug No known bugs.
30 * @see
31 */
32
33#include <util/delay.h>
34#include "usart.h"
35
36#define BUFFER_SIZE 4
37#define DECIMAL_NUM 255
38#define SHORT_DELAY 500
39#define LONG_DELAY 4000
40
41
42/**
43 * Character array to store the received data.
44 */
45char receive_buffer[BUFFER_SIZE];
46
47
48/**
49 * Main routine for the example application.
50 */
51int main()
52{
53 // Setup and initialisation routines.
54 init_usart();
55 usart_print_string("USART Initialised\n\n\n");
56
57 // Loop forever.
58 while (1)
59 {
60 // ------- Echo demonstration. -------- //
61 usart_print_string("Type any three characters.\n");
62 usart_read_string(receive_buffer, BUFFER_SIZE);
63 usart_print_string("\nYou entered: ");
64
65 for (uint8_t index = 0; index < (BUFFER_SIZE - 1); ++index)
66 {
67 //char data = receive_buffer[index];
68 usart_print_char(receive_buffer[index]);
69 }
70 usart_print_string("\n\n\n");
71
72
73 // -------- Data format demonstration. -------- //
74 usart_print_string("Lets start with the decimal number ");
75 usart_print_byte(DECIMAL_NUM);
76 _delay_ms(SHORT_DELAY);
77 usart_print_string("\n");
78 usart_print_string("In 8 bit binary format, that's: ");
79 usart_print_binary_byte(DECIMAL_NUM);
80 _delay_ms(SHORT_DELAY);
81 usart_print_string("\n");
82 usart_print_string("In hexadecimal format, that's: ");
83 usart_print_hex_byte(DECIMAL_NUM);
84 usart_print_string("\n\n\n");
85 _delay_ms(LONG_DELAY);
86 }
87
88 return 0;
89}
90
91
92/*** end of file ***/
usart_print_string
void usart_print_string(const char myString[])
Utility function to transmit a string.
Definition: usart.c:74
usart_print_byte
void usart_print_byte(uint8_t byte)
Prints a byte out as its 3-digit ascii equivalent.
Definition: usart.c:121
usart_read_string
void usart_read_string(char myString[], uint8_t maxLength)
Define a string variable, pass it to this function.
Definition: usart.c:92
usart_print_binary_byte
void usart_print_binary_byte(uint8_t byte)
Prints a byte out in 1s and 0s.
Definition: usart.c:169
usart_print_char
void usart_print_char(char byte)
Prints a byte out as its 1-character ascii equivalent.
Definition: usart.c:145
init_usart
void init_usart(void)
Takes the defined BAUD and F_CPU, calculates the bit-clock multiplier, configures the hardware USART ...
Definition: usart.c:50
usart_print_hex_byte
void usart_print_hex_byte(uint8_t byte)
Prints a byte out in hexadecimal format.
Definition: usart.c:207
main
int main()
Main routine to be executed on the MCU.
Definition: main.c:45
receive_buffer
char receive_buffer[BUFFER_SIZE]
Character array to store the received data.
Definition: main.c:45
usart.h
Driver file providing core USART communication between the target MCU and your PC.