git.y1.nz

commit 7b7499d5e4cf132dafa1a2b1d23f5a989ee74fee
parent c9b5e777ff8a0ee69f6f55b57d64c0d69a1d3a7e
Author: Toxa <untoxa@mail.ru>
Date:   Sun, 19 Feb 2023 21:07:22 +0300

enhance wav playback example

Diffstat:
M
gbdk-lib/examples/gb/wav_sample/src/sample_player.c
30
++++++++++++++++++------------

1 file changed, 18 insertions(+), 12 deletions(-)
diff --git a/gbdk-lib/examples/gb/wav_sample/src/sample_player.c b/gbdk-lib/examples/gb/wav_sample/src/sample_player.c
@@ -20,31 +20,37 @@ void play_isr() __nonbanked __naked {
         ld a, (#__current_bank) ; save bank and switch
         ld e, a
         ld a, (#_play_bank)
-        ld (#0x2000), a
+        ld (_rROMB0), a
+
+        ldh a, (_NR51_REG)
+        ld c, a
+        and #0b10111011
+        ldh (_NR51_REG), a
 
         xor a
-        ldh (_NR30_REG),a       
+        ldh (_NR30_REG), a       
 
-_wave_addr = 0xFF30
-        .rept 16
+        .irp ofs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
             ld a, (hl+)
-            ldh (_wave_addr), a
-_wave_addr = _wave_addr + 1
+            ldh (__AUD3WAVERAM+ofs), a
         .endm
 
         ld a, #0x80             
-        ldh (_NR30_REG),a
+        ldh (_NR30_REG), a
         ld a, #0xFE             ; length of wave
-        ldh (_NR31_REG),a
+        ldh (_NR31_REG), a
         ld a, #0x20             ; volume
-        ldh (_NR32_REG),a
+        ldh (_NR32_REG), a
         xor a                   ; low freq bits are zero
-        ldh (_NR33_REG),a
+        ldh (_NR33_REG), a
         ld a, #0xC7             ; start; no loop; high freq bits are 111
-        ldh (_NR34_REG),a       
+        ldh (_NR34_REG), a       
+
+        ld a, c
+        ldh (_NR51_REG), a
 
         ld a, e                 ; restore bank
-        ld (#0x2000), a
+        ld (_rROMB0), a
 
         ld a, l                 ; save current position
         ld (#_play_sample), a

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