From: Harvie <tomas@mudrunka.cz>
Date: Sat, 14 Jan 2012 11:33:16 +0000 (+0100)
Subject: Made USART working (even with internal RC osc. ;-)
X-Git-Url: https://git.harvie.cz/?a=commitdiff_plain;h=413d122c3b2982943f873d8313ed5a8bff36fad9;p=mirrors%2FPrograms.git

Made USART working (even with internal RC osc. ;-)
---

diff --git a/avr/usart/main.c b/avr/usart/main.c
index 853f82a..dcb16b1 100644
--- a/avr/usart/main.c
+++ b/avr/usart/main.c
@@ -1,16 +1,24 @@
 #include <avr/io.h>
 #define F_CPU 1000000UL //1MHz default internal RC oscillator setting
+//#include <avr/iotn2313.h>
+//#include <avr/interrupt.h>
 //util/delay.h and util/setbaud.h
 
 #define USART_BAUDRATE 9600
 #define BAUD_PRESCALE (((F_CPU / (USART_BAUDRATE * 16UL))) - 1)
 
+#define LED PD5
+
 int main (void)
 {
+  DDRD |= (1 << LED);
+
    char ReceivedByte;
 
    UCSRB |= (1 << RXEN) | (1 << TXEN);   // Turn on the transmission and reception circuitry
    //UCSRC |= (1 << URSEL) | (1 << UCSZ0) | (1 << UCSZ1); // Use 8-bit character sizes (not in attiny2313?)
+   UCSRC |= (1 << UCSZ0) | (1 << UCSZ1);
+	//Hint: stty -F /dev/ttyUSB1 9600 sc7
 
    UBRRH = (BAUD_PRESCALE >> 8); // Load upper 8-bits of the baud rate value into the high byte of the UBRR register
    UBRRL = BAUD_PRESCALE; // Load lower 8-bits of the baud rate value into the low byte of the UBRR register
@@ -20,6 +28,8 @@ int main (void)
       while ((UCSRA & (1 << RXC)) == 0) {}; // Do nothing until data have been received and is ready to be read from UDR
       ReceivedByte = UDR; // Fetch the received byte value into the variable "ByteReceived"
 
+		  PORTD ^= (1 << LED); //Toggle LED after each received byte
+
       while ((UCSRA & (1 << UDRE)) == 0) {}; // Do nothing until UDR is ready for more data to be written to it
       UDR = ReceivedByte; // Echo back the received byte back to the computer
    }