X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=main.c;h=c05eb3b3a61a1eb78bb6670a8effff206199ab9a;hb=refs%2Fheads%2Fmaster;hp=37be879abdb44ae28a01ec53d38bc89520eeed26;hpb=a773ac06cdc55be51ebc0bc61aa6066b54746c7d;p=teensytas.git diff --git a/main.c b/main.c index 37be879..c05eb3b 100644 --- a/main.c +++ b/main.c @@ -1,12 +1,73 @@ +/* + * 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 #include #include #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) { @@ -26,36 +87,491 @@ void yield(void) { } -static void my_portb_isr(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++; +} + +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; - //printf("irq, GPIOB_PDIR: %08x\n", GPIOB_PDIR); + 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; + + 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) { - char buf[64]; - int timeout; + attachInterruptVector(IRQ_PORTD, pl1th_isr_fixed); + attachInterruptVector(IRQ_PORTC, pl2th_isr_fixed); + attachInterruptVector(IRQ_PORTA, vsync_isr_nop); +} + +static void udelay(uint32_t us) +{ + 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, my_portb_isr, CHANGE); - attachInterruptVector(IRQ_PORTB, my_portb_isr); + + // player1 + pinMode(21, INPUT); + attachInterrupt(21, pl1th_isr_fixed, CHANGE); + NVIC_SET_PRIORITY(IRQ_PORTD, 0); pinMode( 2, OUTPUT); pinMode(14, OUTPUT); @@ -64,35 +580,115 @@ int main(void) 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); + } } }