添加一些关于midi播放的项目

2025-03-24 14:30:56 +08:00
parent e31eb22077
commit 498b4ef13b
699 changed files with 186162 additions and 1 deletions
@@ -0,0 +1,33 @@
+#include "SynthCore.h"
+#include "AsmCommon.h"
+
+.section .bss
+.global currentTick
+currentTick:
+.skip 4
+.global decayGenTick
+decayGenTick:
+.skip 1  
+.section .text 
+
+UpdateTick: 
+    sec
+	lds t0l,currentTick
+	adc t0l,zero
+	sts currentTick,t0l
+	lds t0l,currentTick+1
+	adc t0l,zero
+	sts currentTick+1,t0l
+	lds t0l,currentTick+2
+	adc t0l,zero
+	sts currentTick+2,t0l
+	lds t0l,currentTick+3
+	adc t0l,zero
+	sts currentTick+3,t0l
+
+	lds t0l,decayGenTick
+	cpi t0l,DECAY_TIME_FACTOR
+	brsh updateDecayGenTickEnd ; BRSH – Branch if Same or Higher (Unsigned)
+	inc t0l
+	sts decayGenTick,t0l
+	updateDecayGenTickEnd: