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overkill sio cruft, not keeping.

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ed
2026-08-03 10:12:06 -04:00
parent 9eb696ece8
commit 8282f8e902
7 changed files with 958 additions and 37 deletions
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code/hello_joypad/hello_joypad.c
+40 -7
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@@ -125,10 +125,14 @@ typedef Struct_(SMemory) {
U4 pad_state;
PadState pad[2]; /* raw_sio_pad_poll_20260802 — per-port */
PadSioInit pad_sio_init; /* raw_sio_pad_poll_20260802 — boot init */
U4_V scratchpad; // d-cache
};
global SMemory smem;
extern SMemory smem;
U4 scratch_for_atom_diag_pin; /* raw_sio_pad_poll_20260802 — diag atom scratch */
#define pad0_signal_(btn_id) smem.pad_state & pad0_(btn_id)
#define pad1_signal_(btn_id) smem.pad_state & pad1_(btn_id)
@@ -201,8 +205,6 @@ void update(PrimitiveArena* pa, U4* ordering_buf)
{
TapeBuilder tb = tb_make(slice_ut_arr(smem.MemTape));
smem.pad_state = pad_read(0);
if (0) // Pad Input
{
if (pad0_signal_(Pad_Left)) {
@@ -217,8 +219,16 @@ void update(PrimitiveArena* pa, U4* ordering_buf)
if (1) // Pad Input (Tape version)
{
tb.used = 0; tb_scope_run(& tb) {
tb_emit(& tb, pad_input_demo);
tb_data(& tb, smem.pad_state);
/* Per-frame SIO0 poll: pad_sio_step polls both ports; pad_apply_input applies rotation */
tb_emit(& tb, pad_sio_init);
tb_emit(& tb, pad_sio_step);
tb_data(& tb, u4_(& smem.pad[0]));
tb_data(& tb, u4_(& smem.pad[1]));
tb_data(& tb, u4_(smem.pad_sio_init.sio_base_addr[0]));
tb_data(& tb, u4_(smem.pad_sio_init.sio_base_addr[1]));
/* Per-frame rotation apply: consume pad[0].buttons + pad[0].left_x */
tb_emit(& tb, pad_apply_input);
tb_data(& tb, u4_(& smem.pad[0]));
tb_data(& tb, u4_(& smem.cube.rot));
tb_data(& tb, u4_(& smem.floor.rot));
}
@@ -454,13 +464,26 @@ int main(void)
}
TapeBuilder tb = tb_make(slice_ut_arr(smem.MemTape)); {
reset_graph(0);
register U4* io_base_addr rgcc(R_IO_BaseAddr) = u4_r(IO_BASE_ADDR);
register DoubleBuffer* screen_buf rgcc(R_ScreenBuf) = & smem.screen_buf;
pad_sio_init_setup(& smem.pad_sio_init, & smem.pad[0], & smem.pad[1]);
/* raw_sio_pad_poll_20260802 — pin the SIO base for the boot atom.
* Use the KSEG1 constant directly (not via pad_sio_init.sio_base_addr[0])
* because rgcc binds the register to the variable's storage, not the
* value-at-call-site. Reading the field at tape-emit time would require
* an extra load, which the atom body can't do implicitly. */
register U4 pad_io_base rgcc(R_PadSioBase) = pad_IO_KSEG1_BASE;
register U4* io_base_addr rgcc(R_IO_BaseAddr) = u4_r(IO_BASE_ADDR);
register U4* r_diag_scratch rgcc(R_DiagPinScratch) = & scratch_for_atom_diag_pin;
register DoubleBuffer* screen_buf rgcc(R_ScreenBuf) = & smem.screen_buf;
tb.used = 0; tb_scope_run(& tb) {
tb_emit(& tb, screen_env_init);
tb_emit(& tb, gp_screen_init);
tb_emit(& tb, pad_sio_init);
tb_emit(& tb, pad_sio_step); /* initial baseline */
tb_data(& tb, u4_(& smem.pad[0]));
tb_data(& tb, u4_(& smem.pad[1]));
tb_data(& tb, u4_(smem.pad_sio_init.sio_base_addr[0]));
tb_data(& tb, u4_(smem.pad_sio_init.sio_base_addr[1]));
}
pad_init(0);
}
while (1) {
gknown S4* active_buf_id = & smem.active_buf_id;
@@ -472,3 +495,13 @@ int main(void)
};
return 0;
}
/* raw_sio_pad_poll_20260802 — populate the boot-time pad SIO context.
* Populates the two PadState pointers + the KSEG1 SIO base address. */
void pad_sio_init_setup(PadSioInit* init, PadState* s0, PadState* s1)
{
init->sio_base_addr[0] = pad_IO_KSEG1_BASE;
init->sio_base_addr[1] = pad_IO_KSEG1_BASE;
init->pad_state_ptr[0] = s0;
init->pad_state_ptr[1] = s1;
}