Added first commit after corona

Signed-off-by: Tyrolyean <tyrolyean@tyrolyean.net>

code/textadv/bin/mc.hex

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code/textadv/include/16550.h

@@ -41,4 +41,6 @@ void init_uart();
 
 int putchar_16550(char var, FILE *stream);
 
+void routine_uart();
+
 #endif

code/textadv/include/game.h

@@ -0,0 +1,28 @@
+/* Copyright © 2020 tyrolyean
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _GAME_H
+#define _GAME_H
+
+#include <stdint.h>
+
+extern char command_buffer[100];
+extern uint8_t command_buffer_pointer;
+
+void routine_game();
+void ingest_user_char(char in);
+
+#endif

code/textadv/include/sound.h

@@ -22,14 +22,21 @@
 
 struct tone_t {
 	uint8_t waveform;
-	int16_t frequency_deviation;
+	int16_t frequency_deviation; /*  */
-	uint16_t length;
+	uint16_t length; /* The tone length in milliseconds */
 };
 
+/* The end marker tells the sound routines where the end of a track is. It
+ * is required to be present at the end of EVERY track, otherwise the 
+ * routine runs into undefined behaviour */
+#define TRACK_END_MARKER {DAC_MODE_SILENT, 0, 0}
+
+extern const struct tone_t computer_room[] PROGMEM;
 extern const struct tone_t lonely_road[] PROGMEM;
 
-extern const struct tone_t ** current_track;
+extern const struct tone_t * current_track;
 
 void update_sound();
+void init_sound();
 
 #endif

code/textadv/src/16550.c

@@ -17,6 +17,7 @@
 #include "avr.h"
 #include "16550.h"
 #include "structures.h"
+#include "game.h"
 
 #include <stdio.h>
 static FILE stdout_16550 = FDEV_SETUP_STREAM(putchar_16550, NULL, 
@@ -77,3 +78,15 @@ int putchar_16550(char var, FILE *stream __attribute__((unused))){
 	write_to_uart(UART_REG_TXRX,var);
 	return 0;
 }
+
+void routine_uart(){
+	
+	uint8_t received = read_from_uart(UART_REG_LSR);
+	if(received & 0x01){
+		received = read_from_uart(UART_REG_TXRX);
+		ingest_user_char(received);
+		write_to_uart(UART_REG_TXRX,received); /* Echo back */
+	}
+
+	return;
+}

code/textadv/src/game.c

@@ -0,0 +1,49 @@
+/* Copyright © 2020 tyrolyean
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "game.h"
+#include <string.h>
+#include <stdio.h>
+
+char command_buffer[100];
+uint8_t command_buffer_pointer = 0x00;
+
+
+void routine_game(){
+	
+	if(command_buffer_pointer >= sizeof(command_buffer)){
+		command_buffer_pointer = 0x00;
+		memset(command_buffer, 0, sizeof(command_buffer));
+		return;
+	}
+
+	if(command_buffer[command_buffer_pointer-1] == '\n' || 
+			command_buffer[command_buffer_pointer-1] == '\r'){
+
+		
+
+
+		command_buffer_pointer = 0x00;
+		memset(command_buffer, 0, sizeof(command_buffer));
+	}
+
+	return;
+}
+
+void ingest_user_char(char in){
+	command_buffer[command_buffer_pointer++] = in;
+	return;
+}

code/textadv/src/main.c

@@ -20,6 +20,7 @@
 #include "dac.h"
 #include "interrupt.h"
 #include "sound.h"
+#include "game.h"
 
 #include <stdio.h>
 #include <string.h>
@@ -82,7 +83,7 @@ int main(){
 	reset_modules();
 	init_uart();
 	init_interrupts();
-	current_track = (const struct tone_t (**)) &lonely_road;
+	current_track = computer_room;
 	sei();
 	/* Enable the hardware watchdog. In case the microcontroller fails to 
 	 * finish it's task within the specified time, the watchdog will reset
@@ -99,12 +100,9 @@ int main(){
 }
 
 int routine(){
-	uint8_t received = read_from_uart(UART_REG_LSR);
-	if(received & 0x01){
-		received = read_from_uart(UART_REG_TXRX);
-		write_to_uart(UART_REG_TXRX,received);
-	}
 	routine_dac();
+	routine_uart();
+	routine_game();
         return 0;
 }
 

code/textadv/src/sound.c

@@ -22,39 +22,198 @@
 #include <avr/pgmspace.h>
 #include <stddef.h>
 
-const struct tone_t lonely_road[] PROGMEM =
+const struct tone_t computer_room[] PROGMEM =
 {
-	{DAC_MODE_SQUARE, -10,500},
+	{DAC_MODE_SQUARE,  0,100},
-	{DAC_MODE_SQUARE, -9,500},
+	{DAC_MODE_SQUARE,  10,100},
-	{DAC_MODE_SQUARE, -8,500},
+	{DAC_MODE_SQUARE,  0,100},
-	{DAC_MODE_SQUARE, -7,500},
+	{DAC_MODE_SQUARE,  10,100},
-	{DAC_MODE_SQUARE, -6,500},
+	{DAC_MODE_SQUARE,  0,100},
-	{DAC_MODE_SQUARE, -5,500},
+	{DAC_MODE_NOISE,   0,200},
-	{DAC_MODE_SQUARE, -2,500},
+	{DAC_MODE_SINE,    10,50},
-	{DAC_MODE_SQUARE, -2,500},
+	{DAC_MODE_SINE,    -10,50},
-	{DAC_MODE_SQUARE, -2,500},
+	{DAC_MODE_SINE,    10,50},
-	{DAC_MODE_SILENT, 0, 0},
+	{DAC_MODE_SINE,    -10,50},
+	
+	{DAC_MODE_SQUARE,  0,100},
+	{DAC_MODE_SQUARE,  10,100},
+	{DAC_MODE_SQUARE,  0,100},
+	{DAC_MODE_SQUARE,  10,100},
+	{DAC_MODE_SQUARE,  0,100},
+	{DAC_MODE_NOISE,   0,200},
+	{DAC_MODE_SINE,    10,50},
+	{DAC_MODE_SINE,    -10,50},
+	{DAC_MODE_SINE,    10,50},
+	{DAC_MODE_SINE,    -10,50},
+	
+	{DAC_MODE_SQUARE,  0,100},
+	{DAC_MODE_SQUARE,  10,100},
+	{DAC_MODE_SQUARE,  0,100},
+	{DAC_MODE_SQUARE,  10,100},
+	{DAC_MODE_SQUARE,  0,100},
+	{DAC_MODE_NOISE,   0,200},
+	{DAC_MODE_SINE,    10,50},
+	{DAC_MODE_SINE,    -10,50},
+	{DAC_MODE_SINE,    10,50},
+	{DAC_MODE_SINE,    -10,50},
+
+	{DAC_MODE_SQUARE,  0,100},
+	{DAC_MODE_SQUARE,  10,100},
+	{DAC_MODE_SQUARE,  0,100},
+	{DAC_MODE_SQUARE,  10,100},
+	{DAC_MODE_SQUARE,  0,100},
+	{DAC_MODE_NOISE,   0,200},
+	{DAC_MODE_SINE,    10,50},
+	{DAC_MODE_SINE,    -10,50},
+	{DAC_MODE_SINE,    10,50},
+	{DAC_MODE_SINE,    -10,50},
+
+	{DAC_MODE_SQUARE,  0,100},
+	{DAC_MODE_SQUARE,  10,100},
+	{DAC_MODE_SQUARE,  0,100},
+	{DAC_MODE_SQUARE,  10,100},
+	{DAC_MODE_SQUARE,  0,100},
+	{DAC_MODE_NOISE,   0,200},
+	{DAC_MODE_SINE,    10,50},
+	{DAC_MODE_SINE,    -10,50},
+	{DAC_MODE_SINE,    10,50},
+	{DAC_MODE_SINE,    -10,50},
+	
+	{DAC_MODE_SQUARE,  -2,100},
+	{DAC_MODE_SQUARE,  8,100},
+	{DAC_MODE_SQUARE,  -2,100},
+	{DAC_MODE_SQUARE,  8,100},
+	{DAC_MODE_SQUARE,  -2,100},
+	{DAC_MODE_NOISE,   0,200},
+	{DAC_MODE_SINE,    12,50},
+	{DAC_MODE_SINE,    -8,50},
+	{DAC_MODE_SINE,    12,50},
+	{DAC_MODE_SINE,    -8,50},
+	
+	{DAC_MODE_SQUARE,  -3,100},
+	{DAC_MODE_SQUARE,  7,100},
+	{DAC_MODE_SQUARE,  -3,100},
+	{DAC_MODE_SQUARE,  7,100},
+	{DAC_MODE_SQUARE,  -3,100},
+	{DAC_MODE_NOISE,   0,200},
+	{DAC_MODE_SINE,    13,50},
+	{DAC_MODE_SINE,    -7,50},
+	{DAC_MODE_SINE,    13,50},
+	{DAC_MODE_SINE,    -7,50},
+
+	TRACK_END_MARKER
 };
 
-const struct tone_t **current_track = NULL;
+const struct tone_t lonely_road[] PROGMEM =
+{	
+	{DAC_MODE_SQUARE,  -3,200},
+	{DAC_MODE_SQUARE,  -4,200},
+	{DAC_MODE_SQUARE,  -5,200},
+	{DAC_MODE_SQUARE,  -3,200},
+	{DAC_MODE_SQUARE,  -4,200},
+	{DAC_MODE_SQUARE,  -5,200},
+	{DAC_MODE_SQUARE,  -3,200},
+	{DAC_MODE_SQUARE,  -4,200},
+	{DAC_MODE_SQUARE,  -5,200},
+	{DAC_MODE_SQUARE,  -3,200},
+	{DAC_MODE_SQUARE,  -4,200},
+	{DAC_MODE_SQUARE,  -5,200},
 	
+	{DAC_MODE_SQUARE,  -3,200},
+	{DAC_MODE_SQUARE,  -4,200},
+	{DAC_MODE_SQUARE,  -5,200},
+	{DAC_MODE_SQUARE,  -3,200},
+	{DAC_MODE_SQUARE,  -4,200},
+	{DAC_MODE_SQUARE,  -5,200},
+	{DAC_MODE_SQUARE,  -3,200},
+	{DAC_MODE_SQUARE,  -4,200},
+	{DAC_MODE_SQUARE,  -5,200},
+	{DAC_MODE_SQUARE,  -3,200},
+	{DAC_MODE_SQUARE,  -4,200},
+	{DAC_MODE_SQUARE,  -5,200},
+
+	{DAC_MODE_SQUARE,  -3,200},
+	{DAC_MODE_SQUARE,  -4,200},
+	{DAC_MODE_SQUARE,  -5,200},
+	{DAC_MODE_SQUARE,  -3,200},
+	{DAC_MODE_SQUARE,  -4,200},
+	{DAC_MODE_SQUARE,  -5,200},
+	{DAC_MODE_SQUARE,  -3,200},
+	{DAC_MODE_SQUARE,  -4,200},
+	{DAC_MODE_SQUARE,  -5,200},
+	{DAC_MODE_SQUARE,  -3,200},
+	{DAC_MODE_SQUARE,  -4,200},
+	{DAC_MODE_SQUARE,  -5,200},
+	
+	{DAC_MODE_SQUARE,  -3,400},
+	{DAC_MODE_SQUARE,  -4,400},
+	{DAC_MODE_SQUARE,  -5,400},
+	{DAC_MODE_SQUARE,  -3,400},
+	{DAC_MODE_SQUARE,  -4,400},
+	{DAC_MODE_SQUARE,  -5,400},
+	
+	{DAC_MODE_SQUARE,  -3,800},
+	{DAC_MODE_SQUARE,  -4,900},
+	{DAC_MODE_SQUARE,  -5,1000},
+
+	{DAC_MODE_SQUARE,  0,100},
+	{DAC_MODE_NOISE,   0,100},
+	{DAC_MODE_SAW,     0,200},
+	{DAC_MODE_SQUARE,  0,100},
+	{DAC_MODE_NOISE,   0,100},
+	{DAC_MODE_SINE,    0,200},
+	{DAC_MODE_SINE,    0,100},
+	{DAC_MODE_NOISE,   0,100},
+	{DAC_MODE_SINE,    0,200},
+	{DAC_MODE_SQUARE,  0,100},
+
+	TRACK_END_MARKER
+};
+
+const struct tone_t *current_track = NULL;
+
+/* Loops a track indefinitely and changes voices according to predefined tables.
+ * A new track resets the internal state. A voice with a length of 0ms  */
 void update_sound(){
 	
 	static uint16_t audio_time = 0;
 	static size_t tone_pointer = 0x00;
+	static struct tone_t current_tone = {DAC_MODE_SILENT, 0,0};
+	if(current_track == NULL){
+		/* ABORT */
+		audio_time = 0x00;
+		return;
+	}
 	audio_time++;
-	if(!(audio_time >= 
+	static const struct tone_t * old_track = NULL;
-		pgm_read_word(&(*current_track)[tone_pointer].length))){
 	
-		tone_pointer++;
+	if(audio_time >= current_tone.length || 
-		if(pgm_read_word(&(*current_track)[tone_pointer].length) == 0){
+		current_track != old_track){
+		
+		if(old_track != current_track){
 			tone_pointer = 0;
+			audio_time = 0x00;
+			old_track = current_track;
 		}
-		dac_mode = pgm_read_word(
+		memcpy_P(&current_tone,&(current_track[tone_pointer]), 
-			&(*current_track)[tone_pointer].waveform);
+			sizeof(current_tone));
-		dac_frequency_deviation = pgm_read_word(
+		
-			&(*current_track)[tone_pointer].frequency_deviation);
+		if(current_tone.length == 0){
+			tone_pointer = 0;
+			memcpy_P(&current_tone,&(current_track[tone_pointer]), 
+				sizeof(current_tone));
+
+			
+		}
+
+		dac_mode = current_tone.waveform;
+		dac_frequency_deviation = current_tone.frequency_deviation;
+		
+
+		audio_time = 0x00;
+		tone_pointer++;
 
 	}
+	
 	return;
 }