+/*
+ * TeensyTAS, TAS input player for MegaDrive
+ * Copyright (c) 2014 notaz
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "teensy3/core_pins.h"
#include "teensy3/usb_seremu.h"
#include "teensy3/usb_rawhid.h"
+#include "pkts.h"
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
+
+#define noinline __attribute__((noinline))
+
+// use power of 2
+#define STREAM_BUF_SIZE 512
+#define STREAM_BUF_MASK (512 - 1)
/* ?0SA 00DU, ?1CB RLDU */
-static uint8_t fixed_state[4] = { 0x33, 0x3f };
+#define STREAM_EL_SZ 2
+
+static struct {
+ uint8_t stream_to[2][STREAM_BUF_SIZE][STREAM_EL_SZ];
+ uint8_t stream_from[STREAM_BUF_SIZE][STREAM_EL_SZ];
+ struct {
+ union {
+ uint8_t fixed_state[4];
+ uint32_t fixed_state32;
+ };
+ union {
+ uint8_t pending_state[4];
+ uint32_t pending_state32;
+ };
+ } pl[2];
+ uint32_t stream_enable_to:1;
+ uint32_t stream_enable_from:1;
+ uint32_t stream_started:1;
+ uint32_t stream_ended:1;
+ uint32_t inc_mode:2;
+ uint32_t use_pending:1;
+ uint32_t frame_cnt;
+ uint32_t edge_cnt;
+ struct {
+ uint32_t i;
+ uint32_t o;
+ } pos_to_p[2], pos_from;
+} g;
ssize_t _write(int fd, const void *buf, size_t nbyte)
{
{
}
-static void pin0_irq(void)
+static noinline void choose_isrs_idle(void);
+
+/* player1 TH */
+#define PL1_ISFR PORTD_ISFR
+#define PL1_TH() ((CORE_PIN21_PINREG >> CORE_PIN21_BIT) & 1)
+
+static void pl1th_isr_fixed(void)
{
+ uint32_t isfr, th;
+
+ isfr = PL1_ISFR;
+ PL1_ISFR = isfr;
+ th = PL1_TH();
+
+ GPIOD_PDOR = g.pl[0].fixed_state[th];
+ g.edge_cnt++;
}
-void portb_isr(void)
+static noinline void do_to_step_pl1(void)
+{
+ g.frame_cnt++;
+
+ g.pos_to_p[0].o = (g.pos_to_p[0].o + 1) & STREAM_BUF_MASK;
+ if (g.pos_to_p[0].o == g.pos_to_p[0].i)
+ // done
+ choose_isrs_idle();
+}
+
+static void pl1th_isr_do_to_inc(void)
+{
+ uint32_t isfr, th;
+
+ isfr = PL1_ISFR;
+ PL1_ISFR = isfr;
+ th = PL1_TH();
+
+ GPIOD_PDOR = g.stream_to[0][g.pos_to_p[0].o][th];
+ if (th)
+ do_to_step_pl1();
+}
+
+static void pl1th_isr_do_to(void)
+{
+ uint32_t isfr, th;
+
+ isfr = PL1_ISFR;
+ PL1_ISFR = isfr;
+ th = PL1_TH();
+
+ GPIOD_PDOR = g.stream_to[0][g.pos_to_p[0].o][th];
+ g.edge_cnt++;
+}
+
+/* player2 TH */
+#define PL2_ISFR PORTC_ISFR
+#define PL2_TH() ((CORE_PIN15_PINREG >> CORE_PIN15_BIT) & 1)
+#define PL2_ADJ(x) ((x) | ((x) << 12))
+
+static void pl2th_isr_fixed(void)
+{
+ uint32_t isfr, th, v;
+
+ isfr = PL2_ISFR;
+ PL2_ISFR = isfr;
+ th = PL2_TH();
+
+ v = g.pl[1].fixed_state[th];
+ GPIOB_PDOR = PL2_ADJ(v);
+}
+
+static noinline void do_to_step_pl2(void)
+{
+ g.pos_to_p[1].o = (g.pos_to_p[1].o + 1) & STREAM_BUF_MASK;
+ if (g.pos_to_p[1].o == g.pos_to_p[1].i)
+ // done
+ choose_isrs_idle();
+}
+
+static void pl2th_isr_do_to_inc(void)
+{
+ uint32_t isfr, th, v;
+
+ isfr = PL2_ISFR;
+ PL2_ISFR = isfr;
+ th = PL2_TH();
+
+ v = g.stream_to[1][g.pos_to_p[1].o][th];
+ GPIOB_PDOR = PL2_ADJ(v);
+ if (th)
+ do_to_step_pl2();
+}
+
+static void pl2th_isr_do_to_p1d(void)
+{
+ uint32_t isfr, th, v;
+
+ isfr = PL2_ISFR;
+ PL2_ISFR = isfr;
+ th = PL2_TH();
+
+ v = g.stream_to[1][g.pos_to_p[0].o][th];
+ GPIOB_PDOR = PL2_ADJ(v);
+
+ g.pos_to_p[1].o = g.pos_to_p[0].o;
+}
+
+static void pl2th_isr_do_to_inc_pl1(void)
+{
+ uint32_t isfr, th, v;
+
+ isfr = PL2_ISFR;
+ PL2_ISFR = isfr;
+ th = PL2_TH();
+
+ v = g.stream_to[1][g.pos_to_p[1].o][th];
+ GPIOB_PDOR = PL2_ADJ(v);
+ if (th) {
+ do_to_step_pl1();
+ g.pos_to_p[1].o = g.pos_to_p[0].o;
+ }
+}
+
+/* vsync handler */
+#define VSYNC_ISFR PORTC_ISFR
+
+static void vsync_isr_nop(void)
+{
+ uint32_t isfr;
+
+ isfr = VSYNC_ISFR;
+ VSYNC_ISFR = isfr;
+}
+
+// /vsync starts at line 235/259 (ntsc/pal), just as vcounter jumps back
+// we care when it comes out (/vsync goes high) after 3 lines at 238/262
+static void vsync_isr_frameinc(void)
{
uint32_t isfr;
- //printf("irq, GPIOB_PDIR: %08x\n", GPIOB_PDIR);
+ isfr = VSYNC_ISFR;
+ VSYNC_ISFR = isfr;
- GPIOD_PDOR = fixed_state[(GPIOB_PDIR >> CORE_PIN0_BIT) & 1];
+ g.pos_to_p[0].o = (g.pos_to_p[0].o + 1) & STREAM_BUF_MASK;
+ g.pos_to_p[1].o = g.pos_to_p[0].o;
- isfr = PORTB_ISFR;
- PORTB_ISFR = isfr;
+ if (g.pos_to_p[0].o == g.pos_to_p[0].i)
+ choose_isrs_idle();
+ g.frame_cnt++;
}
-int main(void)
+/* "recording" data */
+static noinline void do_from_step(void)
+{
+ uint32_t s;
+
+ // should hopefully give atomic fixed_state read..
+ s = g.pl[0].fixed_state32;
+ g.pl[0].fixed_state32 = g.pl[0].pending_state32;
+ g.stream_from[g.pos_from.i][0] = s;
+ g.stream_from[g.pos_from.i][1] = s >> 8;
+ g.pos_from.i = (g.pos_from.i + 1) & STREAM_BUF_MASK;
+}
+
+static void pl1th_isr_fixed_do_from(void)
+{
+ uint32_t isfr, th;
+
+ isfr = PL1_ISFR;
+ PL1_ISFR = isfr;
+ th = PL1_TH();
+
+ GPIOD_PDOR = g.pl[0].fixed_state[th];
+ if (th)
+ do_from_step();
+ g.edge_cnt++;
+}
+
+static void vsync_isr_frameinc_do_from(void)
+{
+ uint32_t isfr;
+
+ isfr = VSYNC_ISFR;
+ VSYNC_ISFR = isfr;
+
+ do_from_step();
+ g.frame_cnt++;
+}
+
+/* * */
+static void choose_isrs(void)
+{
+ void (*pl1th_handler)(void) = pl1th_isr_fixed;
+ void (*pl2th_handler)(void) = pl2th_isr_fixed;
+ void (*vsync_handler)(void) = vsync_isr_nop;
+
+ if (g.stream_enable_to) {
+ switch (g.inc_mode) {
+ case INC_MODE_VSYNC:
+ pl1th_handler = pl1th_isr_do_to;
+ pl2th_handler = pl2th_isr_do_to_p1d;
+ vsync_handler = vsync_isr_frameinc;
+ break;
+ case INC_MODE_SHARED_PL1:
+ pl1th_handler = pl1th_isr_do_to_inc;
+ pl2th_handler = pl2th_isr_do_to_p1d;
+ break;
+ case INC_MODE_SHARED_PL2:
+ pl1th_handler = pl1th_isr_do_to;
+ pl2th_handler = pl2th_isr_do_to_inc_pl1;
+ break;
+ case INC_MODE_SEPARATE:
+ pl1th_handler = pl1th_isr_do_to_inc;
+ pl2th_handler = pl2th_isr_do_to_inc;
+ break;
+ }
+ }
+ else if (g.stream_enable_from) {
+ g.use_pending = 1;
+ switch (g.inc_mode) {
+ case INC_MODE_VSYNC:
+ vsync_handler = vsync_isr_frameinc_do_from;
+ break;
+ case INC_MODE_SHARED_PL1:
+ pl1th_handler = pl1th_isr_fixed_do_from;
+ break;
+ case INC_MODE_SHARED_PL2:
+ case INC_MODE_SEPARATE:
+ /* TODO */
+ break;
+ }
+ }
+
+ attachInterruptVector(IRQ_PORTD, pl1th_handler);
+ attachInterruptVector(IRQ_PORTC, pl2th_handler);
+ attachInterruptVector(IRQ_PORTA, vsync_handler);
+}
+
+static noinline void choose_isrs_idle(void)
+{
+ attachInterruptVector(IRQ_PORTD, pl1th_isr_fixed);
+ attachInterruptVector(IRQ_PORTC, pl2th_isr_fixed);
+ attachInterruptVector(IRQ_PORTA, vsync_isr_nop);
+}
+
+static void udelay(uint32_t us)
{
- char buf[64];
- int timeout;
+ uint32_t start = micros();
+
+ while ((micros() - start) < us) {
+ asm volatile("nop; nop; nop; nop");
+ yield();
+ }
+}
+
+static void do_start_seq(void)
+{
+ uint32_t edge_cnt_last;
+ uint32_t edge_cnt;
+ uint32_t start, t1, t2;
+ int tout;
+
+ start = micros();
+ edge_cnt = g.edge_cnt;
+
+ /* magic value */
+ g.pl[0].fixed_state[0] =
+ g.pl[0].fixed_state[1] = 0x25;
+
+ for (tout = 10000; tout > 0; tout--) {
+ edge_cnt_last = edge_cnt;
+ udelay(100);
+ edge_cnt = g.edge_cnt;
+
+ if (edge_cnt != edge_cnt_last)
+ continue;
+ if (!PL1_TH())
+ break;
+ }
+
+ g.pl[0].fixed_state[0] = 0x33;
+ g.pl[0].fixed_state[1] = 0x3f;
+ GPIOD_PDOR = 0x33;
+
+ t1 = micros();
+ if (tout == 0) {
+ printf("start_seq timeout1, t=%u\n", t1 - start);
+ return;
+ }
+
+ for (tout = 100000; tout > 0; tout--) {
+ udelay(1);
+
+ if (PL1_TH())
+ break;
+ }
+
+ t2 = micros();
+ if (tout == 0) {
+ printf("start_seq timeout2, t1=%u, t2=%u\n",
+ t1 - start, t2 - t1);
+ return;
+ }
+
+ //printf(" t1=%u, t2=%u\n", t1 - start, t2 - t1);
+
+ if (g.stream_started) {
+ printf("got start_seq when already started\n");
+ return;
+ }
+
+ if (!g.stream_enable_to && !g.stream_enable_from) {
+ printf("got start_seq, without enable from USB\n");
+ return;
+ }
+
+ if (g.stream_enable_to && g.pos_to_p[0].i == g.pos_to_p[0].o) {
+ printf("got start_seq while stream_to is empty\n");
+ return;
+ }
+
+ if (g.stream_enable_from && g.pos_from.i != g.pos_from.o) {
+ printf("got start_seq while stream_from is not empty\n");
+ return;
+ }
+
+ __disable_irq();
+ choose_isrs();
+ g.stream_started = 1;
+ __enable_irq();
+}
+
+// callers must disable IRQs
+static void clear_state(void)
+{
+ int i;
+
+ g.stream_enable_to = 0;
+ g.stream_enable_from = 0;
+ g.stream_started = 0;
+ g.stream_ended = 0;
+ g.inc_mode = INC_MODE_VSYNC;
+ g.use_pending = 0;
+ for (i = 0; i < ARRAY_SIZE(g.pos_to_p); i++)
+ g.pos_to_p[i].i = g.pos_to_p[i].o = 0;
+ g.pos_from.i = g.pos_from.o = 0;
+ g.frame_cnt = 0;
+ memset(g.stream_to[1], 0x3f, sizeof(g.stream_to[1]));
+ choose_isrs_idle();
+}
+
+static int get_space_to(int p)
+{
+ return STREAM_BUF_SIZE - ((g.pos_to_p[p].i - g.pos_to_p[p].o)
+ & STREAM_BUF_MASK);
+}
+
+static int get_used_from(void)
+{
+ return (g.pos_from.i - g.pos_from.o) & STREAM_BUF_MASK;
+}
+
+static void do_usb(void *buf)
+{
+ struct tas_pkt *pkt = buf;
+ uint32_t pos_to_i, i, p;
+ int space;
+
+ switch (pkt->type) {
+ case PKT_FIXED_STATE:
+ memcpy(&i, pkt->data, sizeof(i));
+ if (g.use_pending)
+ g.pl[0].pending_state32 = i;
+ else
+ g.pl[0].fixed_state32 = i;
+ break;
+ case PKT_STREAM_ENABLE:
+ __disable_irq();
+ clear_state();
+ /* wait for start from MD */
+ g.stream_enable_to = pkt->enable.stream_to;
+ g.stream_enable_from = pkt->enable.stream_from;
+ g.inc_mode = pkt->enable.inc_mode;
+ if (pkt->enable.no_start_seq) {
+ GPIOD_PDOR = 0x3f;
+ choose_isrs();
+ g.stream_started = 1;
+ }
+ __enable_irq();
+ break;
+ case PKT_STREAM_ABORT:
+ __disable_irq();
+ clear_state();
+ __enable_irq();
+ break;
+ case PKT_STREAM_END:
+ g.stream_ended = 1;
+ printf("end of stream\n");
+ break;
+ case PKT_STREAM_DATA_TO_P1:
+ case PKT_STREAM_DATA_TO_P2:
+ p = pkt->type == PKT_STREAM_DATA_TO_P1 ? 0 : 1;
+ pos_to_i = g.pos_to_p[p].i;
+ space = get_space_to(p);
+ if (space <= pkt->size / STREAM_EL_SZ) {
+ printf("got data pkt while space=%d\n", space);
+ return;
+ }
+ for (i = 0; i < pkt->size / STREAM_EL_SZ; i++) {
+ memcpy(&g.stream_to[p][pos_to_i++],
+ pkt->data + i * STREAM_EL_SZ,
+ STREAM_EL_SZ);
+ pos_to_i &= STREAM_BUF_MASK;
+ }
+ g.pos_to_p[p].i = pos_to_i;
+ break;
+ default:
+ printf("got unknown pkt type: %04x\n", pkt->type);
+ break;
+ }
+}
+
+static void check_get_data(int p)
+{
+ struct tas_pkt pkt;
+ uint8_t buf[64];
int ret;
+ if (get_space_to(p) <= sizeof(pkt.data) / STREAM_EL_SZ)
+ return;
+
+ if (g.pos_to_p[p].i == g.pos_to_p[p].o && g.frame_cnt != 0) {
+ printf("underflow detected\n");
+ g.stream_enable_to = 0;
+ return;
+ }
+
+ pkt.type = PKT_STREAM_REQ;
+ pkt.req.frame = g.frame_cnt;
+ pkt.req.is_p2 = p;
+
+ ret = usb_rawhid_send(&pkt, 1000);
+ if (ret != sizeof(pkt)) {
+ printf("send STREAM_REQ/%d: %d\n", p, ret);
+ return;
+ }
+
+ ret = usb_rawhid_recv(buf, 1000);
+ if (ret != 64)
+ printf("usb_rawhid_recv/s: %d\n", ret);
+ else
+ do_usb(buf);
+}
+
+int main(void)
+{
+ uint32_t led_time = 0;
+ uint32_t scheck_time = 0;
+ uint32_t edge_cnt_last;
+ uint32_t edge_cnt;
+ uint8_t buf[64];
+ int i, ret;
+
delay(1000); // wait for usb..
+ /* ?0SA 00DU, ?1CB RLDU */
+ for (i = 0; i < 2; i++) {
+ g.pl[i].fixed_state[0] = 0x33;
+ g.pl[i].fixed_state[1] = 0x3f;
+ }
+
printf("starting, rawhid: %d\n", usb_rawhid_available());
- // md pin th tr tl r l d u
- // md bit* 6 5 4 3 2 1 0
- // t bit b16 d5 d4 d3 d2 d1 d0
- // t pin 0 20 6 8 7 14 2
+ choose_isrs_idle();
+
+ // md pin th tr tl r l d u vsync th tr tl r l d u
+ // 7 9 6 4 3 2 1 7 9 6 4 3 2 1
+ // md bit* 6 5 4 3 2 1 0 6 5 4 3 2 1 0
+ // t bit d6 d5 d4 d3 d2 d1 d0 a12 c0 b17 b16 b3 b2 b1 b0
+ // t pin 21 20 6 8 7 14 2 3 15 1 0 18 19 17 16
// * - note: tl/tr mixed in most docs
- pinMode(0, INPUT);
- attachInterrupt(0, pin0_irq, CHANGE);
+
+ // player1
+ pinMode(21, INPUT);
+ attachInterrupt(21, pl1th_isr_fixed, CHANGE);
+ NVIC_SET_PRIORITY(IRQ_PORTD, 0);
pinMode( 2, OUTPUT);
pinMode(14, OUTPUT);
pinMode( 6, OUTPUT);
pinMode(20, OUTPUT);
+ // player2
+ pinMode(15, INPUT);
+ attachInterrupt(15, pl1th_isr_fixed, CHANGE);
+ NVIC_SET_PRIORITY(IRQ_PORTC, 0);
+
+ pinMode(16, OUTPUT);
+ pinMode(17, OUTPUT);
+ pinMode(19, OUTPUT);
+ pinMode(18, OUTPUT);
+ pinMode( 0, OUTPUT);
+ pinMode( 1, OUTPUT);
+
+ // vsync line
+ pinMode(3, INPUT);
+ attachInterrupt(3, vsync_isr_nop, RISING);
+ NVIC_SET_PRIORITY(IRQ_PORTA, 16);
+
// led
pinMode(13, OUTPUT);
- // CORE_PIN13_PORTSET = CORE_PIN13_BITMASK;
- // CORE_PIN13_PORTCLEAR = CORE_PIN13_BITMASK;
+
+ // lower other priorities
+ SCB_SHPR1 = SCB_SHPR2 = SCB_SHPR3 = 0x10101010;
// CORE_PIN0_PORTSET CORE_PIN0_BITMASK PORTB_PCR16
+ printf("GPIOB PDDR, PDIR: %08x %08x\n", GPIOB_PDIR, GPIOB_PDDR);
printf("GPIOC PDDR, PDIR: %08x %08x\n", GPIOC_PDIR, GPIOC_PDDR);
printf("GPIOD PDDR, PDIR: %08x %08x\n", GPIOD_PDIR, GPIOD_PDDR);
printf("PORTB_PCR16: %08x\n", PORTB_PCR16);
+ printf("PORTC_PCR6: %08x\n", PORTC_PCR6);
+ printf("PORTD_PCR0: %08x\n", PORTD_PCR0);
- // ret = usb_rawhid_send(buf, 2000);
+ asm("mrs %0, BASEPRI" : "=r"(ret));
+ printf("BASEPRI: %d, SHPR: %08x %08x %08x\n",
+ ret, SCB_SHPR1, SCB_SHPR2, SCB_SHPR3);
- timeout = 1000;
+ edge_cnt_last = g.edge_cnt;
while (1) {
- ret = usb_rawhid_recv(buf, timeout);
- if (ret == 64) {
- CORE_PIN13_PORTSET = CORE_PIN13_BITMASK;
+ struct tas_pkt pkt;
+ uint32_t now;
+
+ if (g.stream_enable_to && !g.stream_ended) {
+ check_get_data(0);
+ if (g.inc_mode == INC_MODE_SHARED_PL2
+ || g.inc_mode == INC_MODE_SEPARATE)
+ check_get_data(1);
+ }
+
+ while (g.stream_enable_from && !g.stream_ended
+ && get_used_from() >= sizeof(pkt.data) / STREAM_EL_SZ)
+ {
+ uint32_t o;
+ int i;
+
+ o = g.pos_from.o;
+ for (i = 0; i < sizeof(pkt.data); i += STREAM_EL_SZ) {
+ memcpy(pkt.data + i, &g.stream_from[o++],
+ STREAM_EL_SZ);
+ o &= STREAM_BUF_MASK;
+ }
+ g.pos_from.o = o;
+
+ pkt.type = PKT_STREAM_DATA_FROM;
+ pkt.size = i;
+
+ ret = usb_rawhid_send(&pkt, 1000);
+ if (ret != sizeof(pkt)) {
+ printf("send DATA_FROM: %d\n", ret);
+ break;
+ }
+ }
+
+ now = millis();
- memcpy(fixed_state, buf, sizeof(fixed_state));
- timeout = 20;
+ // start condition check
+ if (now - scheck_time > 1000) {
+ edge_cnt = g.edge_cnt;
+ //printf("e: %d th: %d\n", edge_cnt - edge_cnt_last,
+ // PL1_TH());
+ if ((g.stream_enable_to || g.stream_enable_from)
+ && !g.stream_started
+ && edge_cnt - edge_cnt_last > 10000)
+ {
+ do_start_seq();
+ edge_cnt = g.edge_cnt;
+ }
+ edge_cnt_last = edge_cnt;
+ scheck_time = now;
}
- else if (ret == 0) {
- CORE_PIN13_PORTCLEAR = CORE_PIN13_BITMASK;
- timeout = 1000;
+
+ // led?
+ if (CORE_PIN13_PORTREG & CORE_PIN13_BITMASK) {
+ if ((int)(now - led_time) > 10)
+ CORE_PIN13_PORTCLEAR = CORE_PIN13_BITMASK;
}
- else {
- printf("usb_rawhid_recv: %d\n", ret);
- timeout = 1000;
+
+ // something on rawhid?
+ if (usb_rawhid_available() > 0)
+ {
+ ret = usb_rawhid_recv(buf, 20);
+ if (ret == 64) {
+ led_time = millis();
+ CORE_PIN13_PORTSET = CORE_PIN13_BITMASK;
+
+ do_usb(buf);
+ }
+ else {
+ printf("usb_rawhid_recv: %d\n", ret);
+ }
}
}
notaz.gp2x.de / teensytas.git / blobdiff