comment on first amplifier udpate

game-ctrl/Makefile

@@ -7,7 +7,7 @@ MCU=msp430g2553
 CFLAGS=-Wall -mmcu=$(MCU) -std=gnu99 -I $(TOOLCHAIN_PREFIX)/include -O1 -g0
 
 # for debugging
-CFLAGS+= -g3 -ggdb -gdwarf-2
+#CFLAGS+= -g3 -ggdb -gdwarf-2
 
 LDFLAGS=-mmcu=$(MCU) -L $(TOOLCHAIN_PREFIX)/include
 

readme.md

@@ -2,6 +2,14 @@
 
 ![](./docs/IMG_4936.jpg)
 
+Update Amplifier (separate input circuitry per PSG, it appears, that a silent PSG has a DC level on its output which is summarized to the AC output of the working PSG, so two input circuits with individual couping capacitor):
+
+![](./docs/IMG_4941.jpg)
+
+Update of the power switch of the amplifier (at appears, that the small transistor couldn't deliver enough current):
+
+![](./docs/IMG_4958.jpeg)
+
 This Tetris implementation consists of a hardware and a software (running on that hardware).
 
 The hardware utilizes four MSP430 microcontrollers for 1.) the game play, 2.) the play ground canvas, 3.) the score display and 4.) the sound effects.
@@ -54,7 +62,7 @@ An amplifier following the proposal of the AY-3-8913 datasheet is implemented us
 The clock generator proposed by the AY-3-8913 does not work reliably, so an alternative design from "The Art of Electronics" has been used.
 
 ![](./docs/sound-driver-1.jpg) 
-![](./docs/sound-driver-2.jpg) 
+![](./docs/sound-driver-2.png) 
 ![](./docs/sound-driver-3.jpg) 
 ![](./docs/sound-driver-4.jpg) 
 

sound-driver/Makefile

@@ -4,15 +4,13 @@ OBJDUMP=$(TOOLCHAIN_PREFIX)/bin/msp430-elf-objdump
 
 ARTIFACT=firmware
 MCU=msp430g2553
-COMMONFLAGS=-Wall -mmcu=$(MCU) -I $(TOOLCHAIN_PREFIX)/include -g0 -fdata-sections -ffunction-sections
-
 DEBUGFLAGS=
 # DEBUGFLAGS+= -g3 -ggdb -gdwarf-2
+COMMONFLAGS=-Wall -mmcu=$(MCU) -I $(TOOLCHAIN_PREFIX)/include -O0 -g0 $(DEBUGFLAGS)
+CFLAGS=$(COMMONFLAGS) -std=gnu99 
+ASFLAGS=$(COMMONFLAGS) -D__ASSEMBLER__
 
-CFLAGS=$(COMMONFLAGS) -std=gnu99 -O0 $(DEBUGFLAGS)
+LDFLAGS=-mmcu=$(MCU) -L $(TOOLCHAIN_PREFIX)/include
-ASFLAGS=$(COMMONFLAGS) -D__ASSEMBLER__ -Os $(DEBUGFLAGS)
-
-LDFLAGS=-mmcu=$(MCU) -L $(TOOLCHAIN_PREFIX)/include -Wl,-Map,firmware.map
 
 $(ARTIFACT).elf:	main.o scheduler.o spi.o spi_init.o sequencer.o melody_tetris.o melody_tusch1.o psg.o mute.o melody_pling.o
 	$(CC) -o $@ $(LDFLAGS) $^

sound-driver/main.c

@@ -6,6 +6,8 @@
 #include "psg.h"
 #include "scheduler.h"
 #include "sequencer.h"
+#include "melody_tetris.h"
+#include "melody_tusch1.h"
 #include "mute.h"
 
 int main() {
@@ -29,6 +31,7 @@ int main() {
 
   __enable_interrupt();
 
+
   while (1) {
     schExec();
   }

sound-driver/melody_pling.c

@@ -5,8 +5,11 @@
 #include "scheduler.h"
 
 const t_tone plingVoice1[] = {
-  { .octave = e_O_5,    .note = e_C,     .length = e_L_1_4,     .legato = false, .staccato = true  },
+  { .octave = e_O_5,    .note = e_C,     .length = e_L_1_16,    .legato = false, .staccato = false },
-  { .octave = e_O_5,    .note = e_G,     .length = e_L_1_4,     .legato = false, .staccato = true  },
+  { .octave = e_O_5,    .note = e_Cis,   .length = e_L_1_16,    .legato = false, .staccato = false },
+  { .octave = e_O_5,    .note = e_D,     .length = e_L_1_16,    .legato = false, .staccato = false },
+  { .octave = e_O_5,    .note = e_Dis,   .length = e_L_1_16,    .legato = false, .staccato = false },
+  { .octave = e_O_5,    .note = e_E,     .length = e_L_1_8,     .legato = false, .staccato = false },
 
   { .octave = e_O_Null, .note = e_Null,  .length = e_L_SyncMark,.legato = false, .staccato = false },
   { .octave = e_O_Null, .note = e_Null,  .length = e_L_StopMark,.legato = false, .staccato = false },
@@ -16,10 +19,9 @@ const t_tone plingVoice1[] = {
 
 t_melodies pling = {
   .melodies = { { .amplitude = 12, .tones = plingVoice1 } },
-  .chip = 1,
   .numOfMelodies = 1,
   .pace = 200,
-  .slotMask = 0x02
+  .chip = 1
 };
 
 void playPling() {

sound-driver/melody_tetris.c

@@ -922,21 +922,21 @@ const t_tone voice3[] = {
   { .octave = e_O_Null, .note = e_Null,  .length = e_L_EndMark, .legato = false, .staccato = false },
 };
 
+#define INITIAL_PACE 160
 t_melodies tetrisTheme = {
   .melodies = { { .amplitude = 8, .tones = voice1 }, { .amplitude = 8, .tones = voice2 }, { .amplitude = 8, .tones = voice3 } },
-  .chip = 0,
   .numOfMelodies = 3,
-  .pace = 160,
+  .pace = INITIAL_PACE,
-  .slotMask = 0x01
+  .chip = 0
 };
 
 void playMelodyTetris() {
-  tetrisTheme.pace = 160; // reset to start value each time
+  tetrisTheme.pace = INITIAL_PACE; // reset to start value each time
   sequencerPlayMelodies(&tetrisTheme);
 }
 
 void playMelodyTetrisFaster() {
-  tetrisTheme.pace += 10;
+  tetrisTheme.pace += 15;
   sequencerChangePace(&tetrisTheme);
 }
 

sound-driver/melody_tusch1.c

@@ -73,14 +73,14 @@ const t_tone tusch1voice3[] = {
 
 t_melodies tusch1 = {
   .melodies = { { .amplitude = 12, .tones = tusch1voice1 }, { .amplitude = 12, .tones = tusch1voice2 }, { .amplitude = 12, .tones = tusch1voice3 } },
-  .chip = 1,
   .numOfMelodies = 3,
   .pace = 200,
-  .slotMask = 0x02
+  .chip = 1
 };
 
 void playTusch1() {
   sequencerPlayMelodies(&tusch1);
+//  playMelodyTetrisFaster();
 }
 
 

sound-driver/mute.c

@@ -8,15 +8,15 @@ void muteInit() {
   P1DIR |= BIT6;
 
   // initially, mute
-  P1OUT |= BIT6;
-}
-
-void mute() {
-  P1OUT |= BIT6;
-}
-
-void unMute() {
   P1OUT &= ~BIT6;
 }
 
+void mute() {
+  P1OUT &= ~BIT6;
+}
+
+void unMute() {
+  P1OUT |= BIT6;
+}
+
 

sound-driver/psg.c

@@ -81,19 +81,6 @@ inline static void BUS_OP_CS1_DISABLE() {
   BUS_CTRL_REG |= _CS1;
 }
 
-#if 0
-static void delay() {
-asm volatile (
-    "push r12\n"
-    "mov.w #5, r12\n"
-    "loop:\n"
-    "dec.w r12\n"
-    "jnz loop\n"
-    "pop r12\n"
-);
-}
-#endif
-
 static uint8_t psgReadShadow(uint8_t chip, uint8_t address) {
   return psgShadowRegisters[chip][address];
 }
@@ -175,21 +162,5 @@ void psgInit() {
   // disable everything
   psgWrite(0, _ENABLE_REG, 0xff);
   psgWrite(1, _ENABLE_REG, 0xff);
-
-  // volume to 0 on all channels
-  psgWrite(0, CHANNEL_A_AMPLITUDE_REG, 0);
-  psgWrite(0, CHANNEL_B_AMPLITUDE_REG, 0);
-  psgWrite(0, CHANNEL_C_AMPLITUDE_REG, 0);
-  psgWrite(1, CHANNEL_A_AMPLITUDE_REG, 0);
-  psgWrite(1, CHANNEL_B_AMPLITUDE_REG, 0);
-  psgWrite(1, CHANNEL_C_AMPLITUDE_REG, 0);
-
-  // frequency preset
-  psgWriteFrequency(0, 0, 0);
-  psgWriteFrequency(0, 1, 0);
-  psgWriteFrequency(0, 2, 0);
-  psgWriteFrequency(1, 0, 0);
-  psgWriteFrequency(1, 1, 0);
-  psgWriteFrequency(1, 2, 0);
 }
 

sound-driver/scheduler.c

@@ -52,16 +52,6 @@ uint16_t schAdd(void (*exec)(void *), void *handle, uint32_t delay, uint32_t per
   return taskId;
 }
 
-/*
-void schDel(void (*exec)(void *), void *handle) {
-  for (uint16_t i = 0; i < MAX_NUM_OF_TASKS; i++) {
-    if ((tasks[i].exec == exec) && (tasks[i].handle == handle)) {
-      tasks[i].exec = NULL;
-      break;
-    }
-  }
-}
-*/
 void schDel(uint16_t taskId) {
   tasks[taskId].exec = NULL;
 }

sound-driver/sequencer.c

@@ -96,9 +96,11 @@ void sequencerExec(void *handle) {
         melody->state = e_PlayTone;
         break;
       case e_Hold:
+        psgPlayTone(melodies->chip, channel, 0, e_O_Null, e_Pause);
         break;
       case e_Terminate:
         schDel(melodies->taskId);
+        psgPlayTone(melodies->chip, channel, 0, e_O_Null, e_Pause);
         slots &= ~(melodies->slotMask);
         break;
     }
@@ -106,6 +108,8 @@ void sequencerExec(void *handle) {
 }
 
 void sequencerPlayMelodies(t_melodies *melodies) {
+  melodies->slotMask = (1 << melodies->chip);
+
   if ((slots & melodies->slotMask) != 0) {
     return;
   }
@@ -123,8 +127,11 @@ void sequencerPlayMelodies(t_melodies *melodies) {
 }
 
 void sequencerStopMelodies(t_melodies *melodies) {
-  slots &= ~(melodies->slotMask);
   schDel(melodies->taskId);
+  slots &= ~(melodies->slotMask);
+  for (uint8_t channel = 0; channel < melodies->numOfMelodies; channel++) {
+    psgPlayTone(melodies->chip, channel, 0, e_O_Null, e_Pause);
+  }
 }
 
 void sequencerChangePace(t_melodies *melodies) {

sound-driver/sequencer.h

@@ -51,8 +51,8 @@ typedef struct {
 #define SEQUENCER_PERIOD 4 // ms
 #define NUM_OF_CHANNELS 3
 typedef struct {
-  uint8_t chip;
   uint8_t slotMask;
+  uint8_t chip;
   uint8_t taskId;
   uint16_t quarterLength;
   uint8_t numOfMelodies;

sound-driver/spi.S

@@ -1,10 +1,6 @@
 #include <msp430g2553.h>
 #include "soundCodes.h"
 
-;;  .global cmd
-;;  .section .data.spi,"aw"
-;;cmd:
-;;  .byte   
 
   .section ".text","ax",@progbits
 receive_isr:
@@ -29,19 +25,18 @@ spiCmdHandler_2:
 spiCmdHandler_3:
   bit     #SOUND_START, &cmd
   jz      spiCmdHandler_4
-  ;;call    #playMelodyTetris
+  call    #playMelodyTetris
   bic     #SOUND_START, &cmd
 spiCmdHandler_4:
   bit     #SOUND_GAMEOVER, &cmd
   jz      spiCmdHandler_5
-  ;;call    #stopMelodyTetris
+  call    #stopMelodyTetris
-  ;; insert a call here
   bic     #SOUND_GAMEOVER, &cmd
 spiCmdHandler_5:
   bit     #SOUND_FANFARE, &cmd
   jz      spiCmdHandler_6
-  ;;call    #playMelodyTetrisFaster
+  call    #playMelodyTetrisFaster
-  ;;call    #playTusch1
+  call    #playTusch1
   bic     #SOUND_FANFARE, &cmd
 spiCmdHandler_6:
   bit     #SOUND_LOCK, &cmd
@@ -56,12 +51,14 @@ spiCmdHandler_7:
 spiCmdHandler_8:
   bit     #SOUND_PLING, &cmd
   jz      spiCmdHandler_end
-  ;;call    #playPling
+  call    #playPling
   bic     #SOUND_PLING, &cmd
 spiCmdHandler_end:
   ret
 
+
   .section "__interrupt_vector_8","ax",@progbits
   .word   receive_isr
 
+
   .end