58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
/*
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* Project name : Demo5_1 : UART - send / receive characters with waiting
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* Author : Avans-TI, JW
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* Revision History : 20110227: - initial release;
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* Description : This program receive a character, and sends it back
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* Test configuration:
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MCU: ATmega128
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Dev.Board: BIGAVR6
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Oscillator: External Clock 08.0000 MHz
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Ext. Modules: -
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SW: AVR-GCC
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* NOTES:
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- Turn ON switch 12, PEO/PE1 tot RX/TX
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*/
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#define F_CPU 8000000UL
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#include "uart0.h"
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#include "lcd.h"
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// wait(): busy waiting for 'ms' millisecond
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// Used library: util/delay.h
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void wait( int ms )
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{
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for (int tms=0; tms<ms; tms++)
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{
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_delay_ms( 1 ); // library function (max 30 ms at 8MHz)
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}
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}
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// send/receive uart - dB-meter
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int main( void )
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{
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char buffer[16]; // declare string buffer
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DDRB = 0xFF; // set PORTB for output
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lcd_init(); // initialize LCD-display
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usart0_init(); // initialize USART0
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usart0_start();
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wait(100);
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display_text(1, "Test display");
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wait(100);
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while (1)
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{
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wait(50); // every 50 ms (busy waiting)
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PORTB ^= BIT(7); // toggle bit 7 for testing
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uart0_receiveString( buffer ); // receive string from uart
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// write string to LCD display
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display_text(0, buffer);
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}
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} |