- initial import

git-svn-id: http://moon:8086/svn/projects/HendiControl@6 fda53097-d464-4ada-af97-ba876c37ca34
2018-12-15 15:33:53 +00:00
parent 8fca4cd8c2
commit 7d0680a409
4 changed files with 437 additions and 0 deletions
@@ -0,0 +1,172 @@
+/*
+ * uart_echo.c
+ *
+ * Created: 16.08.2018 17:39:49
+ * Author : jens
+ */ 
+
+#include <stdio.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+#define F_CPU			(18432000UL)	// MHz
+#define USART_BAUDRATE	115200UL
+#define BAUD_PRESCALE	(((F_CPU / (USART_BAUDRATE * 16UL))) - 1)
+#define TIMER_RELOAD	(0xFFFF-(F_CPU/1024/4-1))
+static uint8_t rx_data;
+static uint8_t count = 0;
+volatile uint8_t msgCode = 0;
+static uint8_t msgData = 0;
+static uint8_t ledState = 0;
+
+enum MessageCode
+{
+	NOP=0,
+	Command,
+	Timer,
+	Error = 0xFF
+};
+
+ISR(USART0_RX_vect)
+{
+	rx_data = UDR0;
+	
+	msgCode = NOP;
+	if (rx_data == ' ')
+	{
+		msgCode = Error;
+	} 
+	else if (rx_data >= '0' &&  rx_data <= '9')
+	{
+		msgCode = Command;
+		msgData = rx_data;
+	}
+	count++;
+}
+
+ISR (TIMER1_OVF_vect)    // Timer1 ISR
+{
+	msgCode = Timer;
+	TCNT1 = TIMER_RELOAD;
+	ledState++;
+	if (ledState == 4)
+	{
+		ledState = 0;
+	} 
+}
+
+void uart_init()
+{
+	// Set baud rate
+	UBRR0L  = (uint8_t)BAUD_PRESCALE;
+	UBRR0H = (uint8_t)(BAUD_PRESCALE >> 8);
+	
+	// Enable receiver and transmitter
+	UCSR0B = (1<<TXEN0)|(1<<RXEN0);
+	
+	// Enable RX interrupt
+	UCSR0B |= (1<<RXCIE0);
+	
+}
+
+void timer_init()
+{
+	
+	TCNT1 = TIMER_RELOAD;
+
+	TCCR1A = 0x00;
+	TCCR1B = (1<<CS10) | (1<<CS12);  // Timer mode with 1024 prescaler
+	TIMSK1 = (1 << TOIE1) ; // Enable timer1 overflow interrupt(TOIE1)
+	
+}
+
+void uart_putc(char c)
+{
+	while((UCSR0A & (1<<UDRE0)) == 0)
+	{
+	}
+	UDR0 = c;
+}
+
+int uart_putchar(char c, FILE *stream)
+{
+	uart_putc(c);
+	if (c == 0x0A)
+	{
+		uart_putc(0x0D);
+	}
+	return 0;
+}
+
+void uart_puts(char const *str)
+{
+	while(*str)
+	{
+		char c = *(str++);
+		uart_putc(c);
+		if (c == 0x0A)
+		{
+			uart_putc(0x0D);
+		}
+	}	
+}
+
+void port_init()
+{
+	PORTB = PORTB | 0x03;
+	DDRB = DDB1 | DDB2;
+	
+}
+FILE uart_file = FDEV_SETUP_STREAM(uart_putchar, NULL, _FDEV_SETUP_WRITE);
+
+int main(void)
+{
+    /* Replace with your application code */
+	uart_init();
+	timer_init();
+	
+	stdout = &uart_file;
+	printf("UART test version 1.0\n\n");
+	
+	sei();
+	while (1) 
+    {
+	
+		if (msgCode)
+		{
+			cli();
+			switch(msgCode)
+			{
+				case Command:
+				printf("Command : %c\n", msgData);
+				break;
+			
+				case Timer:
+				switch(ledState)
+				{
+					case 0:
+					DDRB = (DDRB & 0xFC) | 0x00;
+					printf("----------- Timer -----------\n");
+					break;
+					case 1:
+					DDRB = (DDRB & 0xFC) | 0x01;
+					break;
+					case 2:
+					DDRB = (DDRB & 0xFC) | 0x03;
+					break;
+					case 3:
+					DDRB = (DDRB & 0xFC) | 0x02;
+					break;
+				}
+				break;
+
+				case Error:
+				printf("Error!!!\n");
+				break;
+			}
+			msgCode = NOP;
+			sei();
+		}
+    }
+}
+