Add 'teensytp/' from commit 'be48e888050f18a31e788269c8f47358036a8e3b'

[megadrive.git] / teensytp / pkts.h

diff --git a/teensytp/pkts.h b/teensytp/pkts.h
new file mode 100644 (file)
index 0000000..582fa72
--- /dev/null
+++ b/teensytp/pkts.h
@@ -0,0 +1,38 @@
+
+enum tas_pkt_type {
+       PKT_FIXED_STATE       = 0xef01,
+       PKT_STREAM_ENABLE     = 0xef02,
+       PKT_STREAM_REQ        = 0xef03,
+       PKT_STREAM_DATA_TO_P1 = 0xef04,
+       PKT_STREAM_DATA_TO_P2 = 0xef05,
+       PKT_STREAM_DATA_FROM  = 0xef06,
+       PKT_STREAM_END        = 0xef07,
+       PKT_STREAM_ABORT      = 0xef08,
+};
+
+struct tas_pkt {
+       uint16_t type;
+       uint16_t size; // for DATA_FROM/TO
+       union {
+               uint8_t data[60];
+               struct {
+                       uint32_t frame; // just fyi
+                       uint8_t is_p2;
+               } req;
+               struct {
+                       uint8_t stream_to;
+                       uint8_t stream_from;
+                       // frame increment on read
+                       uint8_t inc_mode;
+                       uint8_t no_start_seq;
+               } enable;
+       };
+} __attribute__((packed));
+
+enum inc_mode {
+       INC_MODE_VSYNC = 0,
+       // shared stream index incremented by pl1 or pl2
+       INC_MODE_SHARED_PL1 = 1,
+       INC_MODE_SHARED_PL2 = 2,
+       INC_MODE_SEPARATE = 3,
+};