Added ADC and rotary encoder functions

EmbeddedSystemsTHM/CLI.c

@@ -10,6 +10,8 @@
 #include "Taster.h"
 #include "Timer.h"
 #include "Led.h"
+#include "adc.h"
+#include "rotaryEncoder.h"
 
 
 //================================================================================================================================
@@ -17,8 +19,6 @@
 //================================================================================================================================
 #define COUNT_COMMANDS ( sizeof(command) / sizeof(command[0]) )
 
-
-
 #define CHAR_DEL         		0x7F
 #define CHAR_BACKSPACE   		0x08
 #define CHAR_CR          		0x0D
@@ -52,6 +52,8 @@ static void cmd_taster(const char* _data);
 static void cmd_led_on(const char* _data);
 static void cmd_led_off(const char* _data);
 static void cmd_alert(const char* _data);
+static void cmd_adc(const char* _data);
+static void cmd_rotary(const char* _data);
 
 //================================================================================================================================
 // command-Tabelle
@@ -65,6 +67,8 @@ const struct {
 	{"BUTTON",			&cmd_taster,	"Current State of the Buttons"},
 	{"LED_ON $LED",		&cmd_led_on,	"Turn on the LED on position $LED"},
 	{"LED_OFF $LED",	&cmd_led_off,	"Turn off the LED on position $LED"},
+	{"ADC",				&cmd_adc,		"Read the ADC output"},
+	{"ROTARY",			&cmd_rotary,	"Read the rotary encoder"},
 	{"ALERT",			&cmd_alert,		"RING THE ALTER!!!"},
 };
 
@@ -239,12 +243,16 @@ static void cmd_help(const char* _data){
 // Rückgabewert:	keine
 //================================================================================================================================
 static void cmd_taster(const char* _data){
+	print_string("Taster 1: ");
 	print_string(Taster1_get() ? "1" : "0");
 	print_string(NEXT_LINE);
+	print_string("Taster 2: ");
 	print_string(Taster2_get() ? "1" : "0");
 	print_string(NEXT_LINE);
+	print_string("Taster 3: ");
 	print_string(Taster3_get() ? "1" : "0");
 	print_string(NEXT_LINE);
+	print_string("Taster 4: ");
 	print_string(Taster4_get() ? "1" : "0");
 	print_string(NEXT_LINE);
 }
@@ -329,3 +337,68 @@ static void cmd_alert(const char* _data){
 }
 
 
+//================================================================================================================================
+// Funktion:		cmd_adc
+//					Wird verwendet um die Daten von Poti und LM35 zu lesen
+// Parameter:		_data: Zeichenkette mit Parametern des Befehls.
+//
+// Rückgabewert:	keine
+//================================================================================================================================
+static void cmd_adc(const char* _data){
+	char potiData[50];
+	char lm35Data[50];
+	int loopInterval = 500;
+
+	int repeat = strcmp(_data, "R") == 0 ? 1 : 0; /* Check if repeat flag is set*/
+	
+	do
+	{
+		if(Timer_getTick() - g_startMS >= loopInterval){
+			g_startMS=Timer_getTick();
+					
+			// Print Potentiometer info
+			sprintf(potiData, "Poti: %d", adc_get_poti());
+			//sprintf(potiData, "Poti: %f", (adc_get_poti() / 1023.0)); // uses floats - disabled for performance reasons.
+			print_string(potiData);
+			print_string(NEXT_LINE);
+			
+			// Print LM35 temperature
+			sprintf(lm35Data, "LM35: %d\xC2\xB0 C", (int)(adc_get_LM35() * (5000 / 1024) / 10));
+			//sprintf(lm35Data, "LM35: %f\xC2\xB0 C", (adc_get_LM35() * (5000 / 1024.0) / 10)); // uses floats - disabled for performance reasons.
+			print_string(lm35Data);
+			print_string(NEXT_LINE);
+		
+			
+			print_string("----------");
+			print_string(NEXT_LINE);
+		}
+	} while (repeat); // repeat if repeat-flag is given
+
+	
+}
+
+//================================================================================================================================
+// Funktion:		cmd_rotary
+//					Wird verwendet um die Daten von Poti und LM35 zu lesen
+// Parameter:		_data: Zeichenkette mit Parametern des Befehls.
+//
+// Rückgabewert:	keine
+//================================================================================================================================
+static void cmd_rotary(const char* _data){
+	char encoderText[50];
+	int16_t tmp=-32768, cnt=0;
+	
+	do
+	{
+		cnt = drehgeber_get();
+		if(cnt != tmp)
+		{
+			sprintf(encoderText, "Rotary Encoder: %d", drehgeber_get());
+			print_string(encoderText);
+			print_string(NEXT_LINE);
+			
+			tmp = cnt;
+		}
+
+	} while (strcmp(_data, "R") == 0 ? 1 : 0); /* Check if repeat flag is set*/	
+}

EmbeddedSystemsTHM/EmbeddedSystemsTHM.cproj

@@ -151,6 +151,12 @@
     </ToolchainSettings>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="adc.c">
+      <SubType>compile</SubType>
+    </Compile>
+    <Compile Include="adc.h">
+      <SubType>compile</SubType>
+    </Compile>
     <Compile Include="cli.c">
       <SubType>compile</SubType>
     </Compile>
@@ -166,6 +172,12 @@
     <Compile Include="main.c">
       <SubType>compile</SubType>
     </Compile>
+    <Compile Include="rotaryEncoder.c">
+      <SubType>compile</SubType>
+    </Compile>
+    <Compile Include="rotaryEncoder.h">
+      <SubType>compile</SubType>
+    </Compile>
     <Compile Include="StopLight.c">
       <SubType>compile</SubType>
     </Compile>

EmbeddedSystemsTHM/Timer.c

@@ -12,14 +12,14 @@ volatile uint16_t cntr = 0;
 
 void 
 Timer_init (void){
-	TCCR0A |= (1<<1);			/* Set WGM01 to high to enable CTC mode */
-	TCCR0B |= (11<<0);			/* Set the clock select bit to pre-scaler 3 
+	TCCR0A |= (1<<WGM01);		/* Set WGM01 to high to enable CTC mode */
+	TCCR0B |= (3<<CS00);		/* Set the clock select bit to pre-scaler 3 
 								16MHz / 64 (pre-scaler 3) ==> 250KHz */
 	
-	TIMSK0 |= (1<<1);			/* Set OCIE0A to high to rise an interrupt when the counter matches OCR0A */
+	TIMSK0 |= (1<<OCIE0A);		/* Set OCIE0A to high to rise an interrupt when the counter matches OCR0A */
 	
-	OCR0A = 250 ;				/* Set the Output Compare Register 0 A to 125 to trigger interrupt every 1ms
-								16MHz / 64 (pre-scaler 3) / 250 ==> 1KHz (1ms) */
+	OCR0A = 250 - 1;			/* Set the Output Compare Register 0 A to 125 to trigger interrupt every 1ms
+								16MHz / 64 (pre-scaler 3) / (250 -1 ) ==> 1KHz (1ms) */
 }
 
 

EmbeddedSystemsTHM/UART.c

@@ -21,7 +21,6 @@ volatile uint8_t TxActive;
 void 
 uart_init(void)
 {
-	
 	UBRR0 = 103;					/* set BAUD rate to 9600 */
 	 
 	UCSR0C |= 

EmbeddedSystemsTHM/adc.c

@@ -0,0 +1,74 @@
+/*
+ * adc.c
+ *
+ * Created: 09/12/2021 16:31:16
+ *  Author: n0x
+ */ 
+
+#include "adc.h"
+
+void 
+adc_init(void) 
+{
+	ADMUX = (1<<REFS1)|
+			(0<<REFS0)|		/* Set Voltage reference to 2.56V */
+			(0<<ADLAR)		/* Set ADLAR to 0 to not left adjust the presentation of the conversion result */
+	;
+	
+	ADCSRA = (1<<ADEN)|		/* Enable ADC */
+			 (0<<ADATE)|	/* Disable the ADC auto trigger */
+			 (1<<ADIE)|		/* Enable the ADC interrupt */
+			 (1<<ADPS2)|
+			 (1<<ADPS1)|
+			 (1<<ADPS0)		/* Set ADC Prescaler to 128 */
+	;
+}
+
+volatile int done = 1;
+
+/* ADC 1 */
+uint16_t 
+adc_get_poti(void) 
+{		
+	uint16_t adc;
+	ADCSRA &= ~(1<<ADIE);	/* Disable interrupt */
+		
+	ADMUX |= (1<<MUX0);		/* Set ADMUX to access ADC channel 1 */
+	ADCSRA |= (1<<ADSC);	/* Start the conversion */
+
+	done = 0;				/* reset the done flag to false */
+	
+	while(done == 0);		/* Wait till conversion completes */
+	
+	adc = ADC;
+
+	ADCSRA |= (1<<ADIE);	/* Enable the interrupt again */
+
+	return adc;
+}
+
+
+/* ADC 0 */
+uint16_t 
+adc_get_LM35(void) 
+{
+	uint16_t adc;
+	ADCSRA &= ~(1<<ADIE);	/* Disable interrupt */
+	
+	ADMUX &= (0<<MUX0);		/* Set ADMUX to access ADC channel 0 */
+	ADCSRA |= (1<<ADSC);	/* Start the conversion */
+	
+	done = 0;				/* reset the done flag to false */
+	
+	while(done == 0);		/* Wait till conversion completes */
+
+	adc = ADC;
+
+	ADCSRA |= (1<<ADIE);	/* Enable the interrupt again */
+
+	return adc;
+}
+
+ISR(ADC_vect){
+	done = 1;				/* set the done flag to true */
+}

EmbeddedSystemsTHM/adc.h

@@ -0,0 +1,19 @@
+/*
+ * adc.h
+ *
+ * Created: 09/12/2021 16:31:06
+ *  Author: n0x
+ */ 
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+#ifndef ADC_H_
+#define ADC_H_
+
+void adc_init(void);
+
+uint16_t adc_get_poti(void);
+uint16_t adc_get_LM35(void);
+
+#endif /* ADC_H_ */

EmbeddedSystemsTHM/main.c

@@ -10,12 +10,16 @@
 #include "Timer.h"
 #include "Tasks.h"
 #include "StopLight.h"
-#include "UART.h"
-#include "CLI.h"
+#include "uart.h"
+#include "cli.h"
+#include "adc.h"
+#include "rotaryEncoder.h"
 #include <avr/interrupt.h>
 #define F_CPU 1000000
 #include <util/delay.h>
 
+#include <stdio.h>
+
 /* function declarations */
 void buttonTest (void);
 
@@ -31,32 +35,18 @@ main (void)
 	Taster_init();
 	Led_init();	
 	uart_init();
+	adc_init();
+	
+	drehgeber_init();
 	
 	line_interpreter_init(uart_send_byte);
  	uart_send_string("Welcome to the ATmega1284P CLI. Type HELP to display all options.\r\n");
 
     while (1) 
     {	
-		/* UART Standalone Test */
-		/*
-		if(uart_data_available()){
-			char data[500];
-			data[0] = uart_get_data();
-			uart_send_isr(data);
-		}
-		*/
-		
 		if(uart_data_available()){
 			line_interpreter_get_data(uart_get_data());
 		}
-
-		//buttonTest();
-		//runningLight();	
-		//blinkLedWithTimer();
-		//runStopLightTask1();
-		//runStopLightTask2();
-		//uart_send ("uart_send: Hello World\n");
-
     }
 }
 

EmbeddedSystemsTHM/rotaryEncoder.c

@@ -0,0 +1,148 @@
+/*
+ * rotaryEncoder.c
+ *
+ * Created: 16/12/2021 16:34:05
+ *  Author: n0x
+ */ 
+
+#include "rotaryEncoder.h"
+
+#define ROTA PORTC7
+#define ROTB PORTC6
+#define ROTBUTTON PORTC5
+
+/* enums */
+enum{
+	S2, S3, S4, S5, S6, S7,
+	INIT, WAIT
+	} RotaryState = INIT; /* Emus for the stoplight task (task 3) */
+
+int16_t count;
+
+void 
+drehgeber_init(void)
+{
+	DDRC &= ~(7<<DDC5);			/* Set bit 5-7 of Data Direction Register C as input */
+	PORTC |= (7<<PORTC5);		/* Initialize bit 5-7 of PORTC as for pull up resistor */
+	
+	/* With Timer */
+// 	TCCR2A |= (1<<WGM21);
+// 	TCCR2B |= (3<<CS20);
+// 	TIMSK2 |= (1<<OCIE2A);
+// 	OCR2A = 250 - 1;
+	
+	/* With external interrupt */
+	PCICR |= (1<<PCIE2);
+	PCMSK2 |= (1<<PCINT23)|(1<<PCINT22);
+}
+
+// ISR(TIMER2_COMPA_vect)
+// {
+// 	drehgeber_process();
+// }
+
+ISR(PCINT2_vect)
+{
+	drehgeber_process();
+}
+
+void 
+drehgeber_process(void)
+{	
+	uint8_t a,b, enc;
+	a = ((PINC & (1<<ROTA)) == 0);
+	b = ((PINC & (1<<ROTB)) == 0)<<1;
+	enc=a+b;
+	
+	switch(RotaryState)
+	{
+		case INIT:
+		RotaryState = WAIT;
+		break;
+		
+		case WAIT:
+		if(enc == 1)
+		{
+			RotaryState = S2;
+		}
+		if(enc == 2)
+		{
+			RotaryState = S5;
+		}
+		break;
+		
+		case S2:
+		if(enc == 3)
+		{
+			RotaryState = S3;
+		}
+		if(enc == 0)
+		{
+			RotaryState = WAIT;
+		}
+		break;
+		
+		case S3:
+		if(enc == 2)
+		{
+			RotaryState = S4;
+		}
+		if(enc == 1)
+		{
+			RotaryState = S2;
+		}
+		break;
+		
+		case S4:
+		if(enc == 0)
+		{
+			count++;
+			RotaryState = WAIT;
+		}
+		if(enc == 3)
+		{
+			RotaryState = S3;
+		}
+		break;
+		
+		case S5:
+		if(enc == 3)
+		{
+			RotaryState = S6;
+		}
+		if(enc == 0)
+		{
+			RotaryState = WAIT;
+		}
+		break;
+				
+		case S6:
+		if(enc == 1)
+		{
+			RotaryState = S7;
+		}
+		if(enc == 2)
+		{
+			RotaryState = S5;
+		}
+		break;
+		
+				
+		case S7:
+		if(enc == 0)
+		{
+			count--;
+			RotaryState = WAIT;
+		}
+		if(enc == 3)
+		{
+			RotaryState = S6;
+		}
+		break;
+	}
+}
+
+int16_t drehgeber_get(void)
+{
+	return count;
+}

EmbeddedSystemsTHM/rotaryEncoder.h

@@ -0,0 +1,19 @@
+/*
+ * rotaryEncoder.h
+ *
+ * Created: 16/12/2021 16:33:57
+ *  Author: n0x
+ */ 
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+#ifndef ROTARYENCODER_H_
+#define ROTARYENCODER_H_
+
+void drehgeber_init(void);
+void drehgeber_process(void);
+int16_t drehgeber_get(void);
+
+
+#endif /* ROTARYENCODER_H_ */