Started following some tutorial on att85 usi. Downloaded example code from make avr book.

2022-09-20 01:08:01 -04:00
parent d0cbc0000e
commit 361a828c46
295 changed files with 68746 additions and 0 deletions
--- a/Examples/Chapter06_Digital-Input/avrMusicBox/avrMusicBox.c
+++ b/Examples/Chapter06_Digital-Input/avrMusicBox/avrMusicBox.c
@@ -0,0 +1,48 @@
+// Music Box Input Demo
+
+// ------- Preamble -------- //
+#include <avr/io.h>
+#include <util/delay.h>
+#include "organ.h"
+#include "scale16.h"
+#include "pinDefines.h"
+
+#define SONG_LENGTH  (sizeof(song) / sizeof(uint16_t))
+
+int main(void) {
+  const uint16_t song[] = {
+    E6, E6, E6, C6, E6, G6, G5,
+    C6, G5, E5, A5, B5, Ax5, A5,
+    G5, E6, G6, A6, F6, G6, E6, C6, D6, B5,
+    C6, G5, E5, A5, B5, Ax5, A5,
+    G5, E6, G6, A6, F6, G6, E6, C6, D6, B5,
+                                                                /* etc */
+  };
+  /* starting at end b/c routine starts by incrementing and then playing
+     this makes the song start at the beginning after reboot */
+  uint8_t whichNote = SONG_LENGTH - 1;
+  uint8_t wasButtonPressed = 0;
+
+  // -------- Inits --------- //
+  SPEAKER_DDR |= (1 << SPEAKER);                 /* speaker for output */
+  BUTTON_PORT |= (1 << BUTTON);                    /* pullup on button */
+
+  // ------ Event loop ------ //
+  while (1) {
+    if (bit_is_clear(BUTTON_PIN, BUTTON)) {
+      if (!wasButtonPressed) {              /* if it's a new press ... */
+        whichNote++;                           /* advance to next note */
+                                         /* but don't run over the end */
+        if (whichNote == SONG_LENGTH) {
+          whichNote = 0;
+        }
+        wasButtonPressed = 1;
+      }
+      playNote(song[whichNote], 1600);
+    }
+    else {
+      wasButtonPressed = 0;
+    }
+  }                                                  /* End event loop */
+  return 0;
+}