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irq driven music player example

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This commit is contained in:
Irmen de Jong 2019-08-17 11:49:30 +02:00
parent 248e7b808c
commit 3ae2597261
7 changed files with 108 additions and 24 deletions
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2
compiler/src/prog8/compiler/target/c64/codegen/ForLoopsAsmGen.kt
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@ -250,6 +250,7 @@ $continueLabel inc $loopLabel+1
$endLabel""")
}
DataType.ARRAY_UB, DataType.ARRAY_B -> {
// TODO: optimize loop code when the length of the array is < 256, don't need a separate counter in such cases
val length = decl.arraysize!!.size()!!
if(stmt.loopRegister!=null && stmt.loopRegister!= Register.A)
throw AssemblyError("can only use A")
@ -276,6 +277,7 @@ $counterLabel .byte 0
$endLabel""")
}
DataType.ARRAY_W, DataType.ARRAY_UW -> {
// TODO: optimize loop code when the length of the array is < 256, don't need a separate counter in such cases
val length = decl.arraysize!!.size()!! * 2
if(stmt.loopRegister!=null)
throw AssemblyError("can't use register to loop over words")

3
docs/source/todo.rst
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@ -48,6 +48,9 @@ without having to to index into the stack?
Misc
^^^^
Add sort() function that can sort an array (ascending and descending)
Several ideas were discussed on my reddit post
https://www.reddit.com/r/programming/comments/alhj59/creating_a_programming_language_and_cross/

2
examples/arithmetic/bitshift.p8
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@ -1,6 +1,8 @@
%import c64utils
%zeropage basicsafe
; TODO implement asm generation for all operation in here
main {
byte bb

74
examples/bdmusic_irq.p8 Normal file
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@ -0,0 +1,74 @@
%zeropage basicsafe
%import c64lib
main {
sub start() {
c64scr.print("playing the music from boulderdash,\nmade in 1984 by peter liepa.\n\n")
c64utils.set_rasterirq(60) ; enable raster irq
}
}
irq {
const ubyte waveform = %0001 ; triangle
ubyte note_index = 0
ubyte delay = 0
sub irq() {
c64.EXTCOL++
delay++
if delay >= 8 {
delay = 0
c64.AD1 = %00011010
c64.SR1 = %00000000
c64.AD2 = %00011010
c64.SR2 = %00000000
c64.MVOL = 15
uword note = notes[note_index]
note_index++
ubyte note1 = lsb(note)
ubyte note2 = msb(note)
c64.FREQ1 = music_freq_table[note1] ; set lo+hi freq of voice 1
c64.FREQ2 = music_freq_table[note2] ; set lo+hi freq of voice 2
; retrigger voice 1 and 2 ADSR
c64.CR1 = waveform <<4 | 0
c64.CR2 = waveform <<4 | 0
c64.CR1 = waveform <<4 | 1
c64.CR2 = waveform <<4 | 1
}
c64.EXTCOL--
}
; details about the boulderdash music can be found here:
; https://www.elmerproductions.com/sp/peterb/sounds.html#Theme%20tune
uword[] notes = [
$1622, $1d26, $2229, $252e, $1424, $1f27, $2029, $2730,
$122a, $122c, $1e2e, $1231, $202c, $3337, $212d, $3135,
$1622, $162e, $161d, $1624, $1420, $1430, $1424, $1420,
$1622, $162e, $161d, $1624, $1e2a, $1e3a, $1e2e, $1e2a,
$142c, $142c, $141b, $1422, $1c28, $1c38, $1c2c, $1c28,
$111d, $292d, $111f, $292e, $0f27, $0f27, $1633, $1627,
$162e, $162e, $162e, $162e, $222e, $222e, $162e, $162e,
$142e, $142e, $142e, $142e, $202e, $202e, $142e, $142e,
$162e, $322e, $162e, $332e, $222e, $322e, $162e, $332e,
$142e, $322e, $142e, $332e, $202c, $302c, $142c, $312c,
$162e, $163a, $162e, $3538, $222e, $2237, $162e, $3135,
$142c, $1438, $142c, $1438, $202c, $2033, $142c, $1438,
$162e, $322e, $162e, $332e, $222e, $322e, $162e, $332e,
$142e, $322e, $142e, $332e, $202c, $302c, $142c, $312c,
$2e32, $292e, $2629, $2226, $2c30, $272c, $2427, $1420,
$3532, $322e, $2e29, $2926, $2730, $242c, $2027, $1420
]
uword[] music_freq_table = [
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
732, 778, 826, 876, 928, 978, 1042, 1100, 1170, 1238, 1312, 1390, 1464, 1556,
1652, 1752, 1856, 1956, 2084, 2200, 2340, 2476, 2624, 2780, 2928, 3112, 3304,
3504, 3712, 3912, 4168, 4400, 4680, 4952, 5248, 5560, 5856, 6224, 6608, 7008,
7424, 7824, 8336, 8800, 9360, 9904, 10496, 11120, 11712
]
}

19
examples/cube3d-sprites.p8
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@ -1,7 +1,7 @@
%import c64lib
%import c64utils
; TODO: some optimizer breaks this.. the 3d sorting seems broken? or maybe more? runs fine without optimization
; TODO: some optimizer breaks this.. runs fine without optimization
spritedata $2000 {
; this memory block contains the sprite data
@ -102,12 +102,12 @@ main {
; rotate around origin (0,0,0)
; set up the 3d rotation matrix values
word wcosa = cos8(ax) as word
word wsina = sin8(ax) as word
word wcosb = cos8(ay) as word
word wsinb = sin8(ay) as word
word wcosc = cos8(az) as word
word wsinc = sin8(az) as word
word wcosa = cos8(ax)
word wsina = sin8(ax)
word wcosb = cos8(ay)
word wsinb = sin8(ay)
word wcosc = cos8(az)
word wsinc = sin8(az)
word wcosa_sinb = wcosa*wsinb / 128
word wsina_sinb = wsina*wsinb / 128
@ -136,7 +136,8 @@ main {
; set each of the 8 sprites to the correct vertex of the cube
; first sort vertices to sprite order so the back/front order is correct as well
; (chose to do a simple bubble sort it's only 8 items to sort)
; (simple bubble sort as it's only 8 items to sort)
; TODO make a builtin function sort()
for ubyte sorti in 6 to 0 step -1 {
for ubyte i1 in 0 to sorti {
ubyte i2 = i1+1
@ -163,7 +164,7 @@ main {
else
c64.SPRPTR[i] = $2000/64 ; small ball
c64.SPCOL[i] = spritecolors[zc>>13 as byte + 4] ; further away=darker color
c64.SPCOL[i] = spritecolors[(zc>>13) as byte + 4] ; further away=darker color
}
}
}

30
examples/cube3d.p8
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@ -41,12 +41,12 @@ main {
; rotate around origin (0,0,0)
; set up the 3d rotation matrix values
word wcosa = cos8(ax) as word
word wsina = sin8(ax) as word
word wcosb = cos8(ay) as word
word wsinb = sin8(ay) as word
word wcosc = cos8(az) as word
word wsinc = sin8(az) as word
word wcosa = cos8(ax)
word wsina = sin8(ax)
word wcosb = cos8(ay)
word wsinb = sin8(ay)
word wcosc = cos8(az)
word wsinc = sin8(az)
word wcosa_sinb = wcosa*wsinb / 128
word wsina_sinb = wsina*wsinb / 128
@ -62,14 +62,13 @@ main {
word Azz = wcosb*wcosc / 128
for ubyte i in 0 to len(xcoor)-1 {
rotatedx[i] = (Axx*xcoor[i] + Axy*ycoor[i] + Axz*zcoor[i]) / 128
rotatedy[i] = (Ayx*xcoor[i] + Ayy*ycoor[i] + Ayz*zcoor[i]) / 128
rotatedz[i] = (Azx*xcoor[i] + Azy*ycoor[i] + Azz*zcoor[i]) / 128
; don't normalize by dividing by 128, instead keep some precision for perspective calc later
rotatedx[i] = (Axx*xcoor[i] + Axy*ycoor[i] + Axz*zcoor[i])
rotatedy[i] = (Ayx*xcoor[i] + Ayy*ycoor[i] + Ayz*zcoor[i])
rotatedz[i] = (Azx*xcoor[i] + Azy*ycoor[i] + Azz*zcoor[i])
}
}
ubyte[] vertexcolors = [1,7,7,12,11,6]
sub draw_edges() {
; plot the points of the 3d cube
@ -80,24 +79,25 @@ main {
word persp
byte sx
byte sy
ubyte color
for i in 0 to len(xcoor)-1 {
rz = rotatedz[i]
if rz >= 10 {
persp = (rz+200) / height
persp = 900 + rz/32
sx = rotatedx[i] / persp as byte + width/2
sy = rotatedy[i] / persp as byte + height/2
c64scr.setcc(sx as ubyte, sy as ubyte, 46, vertexcolors[(rz as byte >>5) + 3])
c64scr.setcc(sx as ubyte, sy as ubyte, 46, 7)
}
}
for i in 0 to len(xcoor)-1 {
rz = rotatedz[i]
if rz < 10 {
persp = (rz+200) / height
persp = 900 + rz/32
sx = rotatedx[i] / persp as byte + width/2
sy = rotatedy[i] / persp as byte + height/2
c64scr.setcc(sx as ubyte, sy as ubyte, 81, vertexcolors[(rz as byte >>5) + 3])
c64scr.setcc(sx as ubyte, sy as ubyte, 81, 7)
}
}
}

2
examples/testforloops.p8
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@ -1,5 +1,7 @@
%zeropage basicsafe
; TODO implement asm generation for all loops here
main {
sub start() {