Hi,
I have to correct someone code, but I'm not so good in this. As I understand there are problem with UART receiving and/or sending.
Can someone help me with this please?
uart.hpp file
#ifndef UART_H_
#define UART_H_
#ifndef UART_BAUDRATE
#warning "You should define UART_BAUDRATE in ini file"
#define UART_BAUDRATE 19200UL
#endif
#define F_CPU 14745600L
#define BAUD_PRESCALE F_CPU/16/UART_BAUDRATE-1
void uart_init(uint16_t ubrr);
void uart_send(unsigned int);
void sendstring(char *strin);
void dec_print(int16_t inp);
void hex_print(uint32_t inp);
void bin_print(unsigned char inp);
void cr(void);
unsigned char UART_Receive(void);
#endif /* UART_H_ */uart.cpp file
#include <Arduino.h>
void uart_init(unsigned int ubrr)
{
//Setup baudrate
UBRR0H = (unsigned char)(ubrr >> 8);
UBRR0L = (unsigned char)ubrr;
//Enable receiver, transmitter and receive interrupt
UCSR0B = _BV(RXEN0) | _BV(TXEN0) | _BV(RXCIE0);
//Set frame format: 8data
UCSR0C = _BV(UCSZ01) | _BV(UCSZ00);
//UCSR0B &= ~_BV(UCSZ02);
}
void uart_send(unsigned int data)
{
//Wait for empty transmit buffer
while (!(UCSR0A & _BV(UDRE0)));
//Put data into buffer, sends the data
UDR0 = data;
}
void sendstring(char *strin)
{
int k = strlen(strin);
for (int i = 0; i < k; i++)
{
while ((UCSR0A & _BV(UDRE0)) == 0);
UDR0 = strin[i];
}
}
void dec_print(int16_t inp)
{
char mas[8];
if (inp < 0)
{
uart_send('-');
inp = abs(inp);
}
itoa(inp, mas, 10);
sendstring(mas);
//uart_send(13);
}
void bin_print(unsigned char inp)
{
for (unsigned char i = 8; i > 0; i--)
{
if (inp & _BV(i - 1))
{
uart_send('1');
}
else
{
uart_send('0');
}
}
}
void hex_print(uint32_t inp)
{
char mas[15];
itoa(inp, mas, 16);
sendstring("0x");
sendstring(mas);
}
void cr(void) { uart_send('\r'); }
unsigned char UART_Receive(void)
{
//Wait for data to be received
while (!(UCSR0A & (1 << RXC0)));
//Get and return received data from buffer
return UDR0;
}
