| 1 | /* |
| 2 | * TeensyTP, Team Player/4-Player Adaptor implementation for Teensy3 |
| 3 | * using a host machine with USB hub |
| 4 | * Copyright (c) 2015 notaz |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining |
| 7 | * a copy of this software and associated documentation files (the |
| 8 | * "Software"), to deal in the Software without restriction, including |
| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
| 10 | * distribute, sublicense, and/or sell copies of the Software, and to |
| 11 | * permit persons to whom the Software is furnished to do so, subject to |
| 12 | * the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall be |
| 15 | * included in all copies or substantial portions of the Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 18 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 20 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 21 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 22 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 23 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 24 | * SOFTWARE. |
| 25 | */ |
| 26 | |
| 27 | #include <stdint.h> |
| 28 | #include <stdio.h> |
| 29 | #include <string.h> |
| 30 | #include "teensy3/core_pins.h" |
| 31 | #include "teensy3/usb_seremu.h" |
| 32 | #include "teensy3/usb_rawhid.h" |
| 33 | #include "pkts.h" |
| 34 | |
| 35 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) |
| 36 | |
| 37 | #define noinline __attribute__((noclone,noinline)) |
| 38 | |
| 39 | ssize_t _write(int fd, const void *buf, size_t nbyte) |
| 40 | { |
| 41 | char tbuf[64]; |
| 42 | int ret; |
| 43 | |
| 44 | if (fd != 1 && fd != 2) { |
| 45 | snprintf(tbuf, sizeof(tbuf), "write to fd %d\n", fd); |
| 46 | usb_seremu_write(tbuf, strlen(tbuf)); |
| 47 | } |
| 48 | |
| 49 | ret = usb_seremu_write(buf, nbyte); |
| 50 | return ret < 0 ? ret : nbyte; |
| 51 | } |
| 52 | |
| 53 | void yield(void) |
| 54 | { |
| 55 | } |
| 56 | |
| 57 | /* |
| 58 | * 00157:231: w 70 @ 007ef2 |
| 59 | * 00157:231: r 7f @ 007f06 |
| 60 | * 00157:231: w 30 @ 007efa |
| 61 | * 00157:231: r 33 @ 007f06 |
| 62 | * 00157:232: w 40 @ 007f6a |
| 63 | * 00157:232: r 7f @ 007f70 |
| 64 | */ |
| 65 | |
| 66 | /* ?0SA 00DU, ?1CB RLDU */ |
| 67 | |
| 68 | static struct { |
| 69 | struct { |
| 70 | union { |
| 71 | uint8_t b[2]; |
| 72 | uint8_t b6[4 * 2]; // 6btn |
| 73 | uint32_t w; // for more atomic change |
| 74 | }; |
| 75 | uint32_t phase; // 6btn |
| 76 | uint32_t time; |
| 77 | } btn_state[2]; |
| 78 | |
| 79 | uint8_t tp_state[16]; |
| 80 | uint32_t tp_cnt; |
| 81 | |
| 82 | uint32_t mode; |
| 83 | uint32_t pl1th:1; |
| 84 | } g; |
| 85 | |
| 86 | /* player1 TH */ |
| 87 | #define PL1_ISFR PORTD_ISFR |
| 88 | #define PL1_TH() ((CORE_PIN21_PINREG >> CORE_PIN21_BIT) & 1) |
| 89 | #define PL1_TR() ((CORE_PIN20_PINREG >> CORE_PIN20_BIT) & 1) |
| 90 | #define PL1_TH_MASK CORE_PIN21_BITMASK |
| 91 | #define PL1_TR_MASK CORE_PIN20_BITMASK |
| 92 | |
| 93 | static void pl1_isr_3btn(void) |
| 94 | { |
| 95 | uint32_t isfr; |
| 96 | |
| 97 | isfr = PL1_ISFR; |
| 98 | PL1_ISFR = isfr; |
| 99 | |
| 100 | GPIOD_PDOR = g.btn_state[0].b[PL1_TH()]; |
| 101 | } |
| 102 | |
| 103 | static void pl1_isr_6btn(void) |
| 104 | { |
| 105 | uint32_t isfr, th, phase = 0; |
| 106 | |
| 107 | isfr = PL1_ISFR; |
| 108 | PL1_ISFR = isfr; |
| 109 | |
| 110 | th = PL1_TH(); |
| 111 | if (th) |
| 112 | g.btn_state[0].phase++; |
| 113 | if (g.btn_state[0].phase < 4) |
| 114 | phase = g.btn_state[0].phase; |
| 115 | |
| 116 | GPIOD_PDOR = g.btn_state[0].b[(phase << 1) | PL1_TH()]; |
| 117 | g.btn_state[0].time = millis(); |
| 118 | } |
| 119 | |
| 120 | // team player |
| 121 | static noinline void pl1_isr_tp_do_th(void) |
| 122 | { |
| 123 | uint32_t cnt, th; |
| 124 | |
| 125 | th = PL1_TH(); |
| 126 | cnt = !th; |
| 127 | |
| 128 | GPIOD_PDOR = g.tp_state[cnt] | (PL1_TR() << 4); |
| 129 | g.tp_cnt = cnt; |
| 130 | g.pl1th = th; |
| 131 | } |
| 132 | |
| 133 | static void pl1_isr_tp(void) |
| 134 | { |
| 135 | uint32_t isfr; |
| 136 | |
| 137 | isfr = PL1_ISFR; |
| 138 | PL1_ISFR = isfr; |
| 139 | |
| 140 | if (isfr & PL1_TH_MASK) |
| 141 | pl1_isr_tp_do_th(); |
| 142 | if (!(isfr & PL1_TR_MASK)) |
| 143 | return; |
| 144 | if (g.pl1th) |
| 145 | return; |
| 146 | |
| 147 | g.tp_cnt++; |
| 148 | GPIOD_PDOR = g.tp_state[g.tp_cnt & 0x0f] | (PL1_TR() << 4); |
| 149 | } |
| 150 | |
| 151 | /* player2 TH */ |
| 152 | #define PL2_ISFR PORTC_ISFR |
| 153 | #define PL2_TH() ((CORE_PIN15_PINREG >> CORE_PIN15_BIT) & 1) |
| 154 | #define PL2_ADJ(x) ((x) | ((x) << 12)) |
| 155 | |
| 156 | static void pl2_isr_nop(void) |
| 157 | { |
| 158 | uint32_t isfr; |
| 159 | |
| 160 | isfr = PL2_ISFR; |
| 161 | PL2_ISFR = isfr; |
| 162 | |
| 163 | GPIOB_PDOR = PL2_ADJ(0x3f); |
| 164 | } |
| 165 | |
| 166 | static void pl2_isr_3btn(void) |
| 167 | { |
| 168 | uint32_t isfr; |
| 169 | |
| 170 | isfr = PL2_ISFR; |
| 171 | PL2_ISFR = isfr; |
| 172 | |
| 173 | GPIOB_PDOR = PL2_ADJ(g.btn_state[1].b[PL2_TH()]); |
| 174 | } |
| 175 | |
| 176 | static void pl2_isr_6btn(void) |
| 177 | { |
| 178 | uint32_t isfr, th, phase = 0; |
| 179 | |
| 180 | isfr = PL2_ISFR; |
| 181 | PL2_ISFR = isfr; |
| 182 | |
| 183 | th = PL2_TH(); |
| 184 | if (th) |
| 185 | g.btn_state[1].phase++; |
| 186 | if (g.btn_state[1].phase < 4) |
| 187 | phase = g.btn_state[1].phase; |
| 188 | |
| 189 | GPIOB_PDOR = PL2_ADJ(g.btn_state[1].b[(phase << 1) | PL2_TH()]); |
| 190 | g.btn_state[1].time = millis(); |
| 191 | } |
| 192 | |
| 193 | /* * */ |
| 194 | static void clear_state() |
| 195 | { |
| 196 | int p, i; |
| 197 | |
| 198 | // no hw connected |
| 199 | for (p = 0; p < 2; p++) { |
| 200 | for (i = 0; i < 4 * 2; i++) |
| 201 | g.btn_state[p].b6[i] = 0x3f; |
| 202 | g.btn_state[p].phase = 0; |
| 203 | } |
| 204 | |
| 205 | // 4 pads, nothing pressed |
| 206 | g.tp_state[0] = 0x03; |
| 207 | g.tp_state[1] = 0x0f; |
| 208 | g.tp_state[2] = 0x00; |
| 209 | g.tp_state[3] = 0x00; |
| 210 | for (i = 4; i < 8; i++) |
| 211 | g.tp_state[i] = 0x00; // 3btn |
| 212 | for (; i < 16; i++) |
| 213 | g.tp_state[i] = 0x0f; |
| 214 | |
| 215 | g.tp_cnt = 0; |
| 216 | g.pl1th = PL1_TH(); |
| 217 | } |
| 218 | |
| 219 | static void switch_mode(int mode) |
| 220 | { |
| 221 | void (*pl1_handler)(void) = pl1_isr_3btn; |
| 222 | void (*pl2_handler)(void) = pl2_isr_3btn; |
| 223 | |
| 224 | clear_state(); |
| 225 | |
| 226 | switch (mode) { |
| 227 | default: |
| 228 | case OP_MODE_3BTN: |
| 229 | pinMode(20, OUTPUT); |
| 230 | break; |
| 231 | case OP_MODE_6BTN: |
| 232 | pinMode(20, OUTPUT); |
| 233 | pl1_handler = pl1_isr_6btn; |
| 234 | pl2_handler = pl2_isr_6btn; |
| 235 | break; |
| 236 | case OP_MODE_TEAMPLAYER: |
| 237 | pinMode(20, INPUT); |
| 238 | attachInterrupt(20, pl1_handler, CHANGE); |
| 239 | pl1_handler = pl1_isr_tp; |
| 240 | pl2_handler = pl2_isr_nop; |
| 241 | GPIOB_PDOR = PL2_ADJ(0x3f); |
| 242 | break; |
| 243 | } |
| 244 | |
| 245 | attachInterruptVector(IRQ_PORTD, pl1_handler); |
| 246 | attachInterruptVector(IRQ_PORTC, pl2_handler); |
| 247 | g.mode = mode; |
| 248 | } |
| 249 | |
| 250 | // btns: MXYZ SACB RLDU |
| 251 | static void update_btns_btn(const struct tp_pkt *pkt, uint32_t player) |
| 252 | { |
| 253 | // ?1CB RLDU ?0SA 00DU |
| 254 | uint32_t s_6btn0, s_6btn1; |
| 255 | uint32_t s_3btn; |
| 256 | |
| 257 | s_3btn = (~pkt->bnts[player] << 8) & 0x3f00; |
| 258 | s_3btn |= (~pkt->bnts[player] >> 2) & 0x0030; // SA |
| 259 | s_3btn |= (~pkt->bnts[player] ) & 0x0003; // DU |
| 260 | s_3btn |= s_3btn << 16; |
| 261 | g.btn_state[player].w = s_3btn; |
| 262 | |
| 263 | // 6btn stuff |
| 264 | s_6btn0 = s_3btn & 0x30; |
| 265 | s_6btn1 = s_3btn >> 8; |
| 266 | g.btn_state[player].b6[4] = s_6btn0; // ?0SA 0000 |
| 267 | g.btn_state[player].b6[5] = s_6btn1; // ?1CB RLDU |
| 268 | g.btn_state[player].b6[6] = s_6btn0 | 0x0f; // ?0SA 1111 |
| 269 | s_6btn1 &= 0x30; |
| 270 | s_6btn1 |= (~pkt->bnts[player] >> 8) & 0x0f; |
| 271 | g.btn_state[player].b6[7] = s_6btn1; // ?1CB MXYZ |
| 272 | } |
| 273 | |
| 274 | static void update_btns_tp(const struct tp_pkt *pkt, uint32_t player) |
| 275 | { |
| 276 | uint8_t b0, b1; |
| 277 | |
| 278 | b0 = ~pkt->bnts[player] & 0x0f; |
| 279 | b1 = (~pkt->bnts[player] >> 4) & 0x0f; |
| 280 | g.tp_state[8 + player * 2 ] = b0; |
| 281 | g.tp_state[8 + player * 2 + 1] = b1; |
| 282 | } |
| 283 | |
| 284 | static void do_usb(const void *buf) |
| 285 | { |
| 286 | const struct tp_pkt *pkt = buf; |
| 287 | uint32_t i; |
| 288 | |
| 289 | switch (pkt->type) { |
| 290 | case PKT_UPD_MODE: |
| 291 | __disable_irq(); |
| 292 | switch_mode(pkt->mode); |
| 293 | __enable_irq(); |
| 294 | break; |
| 295 | case PKT_UPD_BTNS: |
| 296 | switch (g.mode) { |
| 297 | case OP_MODE_3BTN: |
| 298 | case OP_MODE_6BTN: |
| 299 | if (pkt->changed_players & 1) |
| 300 | update_btns_btn(pkt, 0); |
| 301 | if (pkt->changed_players & 2) |
| 302 | update_btns_btn(pkt, 1); |
| 303 | break; |
| 304 | case OP_MODE_TEAMPLAYER: |
| 305 | for (i = 0; i < 4; i++) { |
| 306 | if (!(pkt->changed_players & (1 << i))) |
| 307 | continue; |
| 308 | update_btns_tp(pkt, i); |
| 309 | } |
| 310 | } |
| 311 | break; |
| 312 | default: |
| 313 | printf("got unknown pkt type: %04x\n", pkt->type); |
| 314 | break; |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | int main(void) |
| 319 | { |
| 320 | uint32_t led_time = 0; |
| 321 | uint8_t buf[64]; |
| 322 | int ret; |
| 323 | |
| 324 | delay(1000); // wait for usb.. |
| 325 | |
| 326 | printf("starting, rawhid: %d\n", usb_rawhid_available()); |
| 327 | |
| 328 | switch_mode(OP_MODE_3BTN); |
| 329 | |
| 330 | // md pin th tr tl r l d u vsync th tr tl r l d u |
| 331 | // 7 9 6 4 3 2 1 7 9 6 4 3 2 1 |
| 332 | // md bit* 6 5 4 3 2 1 0 6 5 4 3 2 1 0 |
| 333 | // t bit d6 d5 d4 d3 d2 d1 d0 a12 c0 b17 b16 b3 b2 b1 b0 |
| 334 | // t pin 21 20 6 8 7 14 2 3 15 1 0 18 19 17 16 |
| 335 | // * - note: tl/tr mixed in most docs |
| 336 | |
| 337 | // player1 |
| 338 | pinMode(21, INPUT); |
| 339 | // note: func is not used, see attachInterruptVector() |
| 340 | attachInterrupt(21, pl1_isr_3btn, CHANGE); |
| 341 | NVIC_SET_PRIORITY(IRQ_PORTD, 0); |
| 342 | |
| 343 | pinMode( 2, OUTPUT); |
| 344 | pinMode(14, OUTPUT); |
| 345 | pinMode( 7, OUTPUT); |
| 346 | pinMode( 8, OUTPUT); |
| 347 | pinMode( 6, OUTPUT); |
| 348 | pinMode(20, OUTPUT); |
| 349 | |
| 350 | // player2 |
| 351 | pinMode(15, INPUT); |
| 352 | attachInterrupt(15, pl2_isr_nop, CHANGE); |
| 353 | NVIC_SET_PRIORITY(IRQ_PORTC, 0); |
| 354 | |
| 355 | pinMode(16, OUTPUT); |
| 356 | pinMode(17, OUTPUT); |
| 357 | pinMode(19, OUTPUT); |
| 358 | pinMode(18, OUTPUT); |
| 359 | pinMode( 0, OUTPUT); |
| 360 | pinMode( 1, OUTPUT); |
| 361 | |
| 362 | // led |
| 363 | pinMode(13, OUTPUT); |
| 364 | |
| 365 | // lower other priorities |
| 366 | SCB_SHPR1 = SCB_SHPR2 = SCB_SHPR3 = 0x10101010; |
| 367 | |
| 368 | // CORE_PIN0_PORTSET CORE_PIN0_BITMASK PORTB_PCR16 |
| 369 | printf("GPIOB PDDR, PDIR: %08x %08x\n", GPIOB_PDIR, GPIOB_PDDR); |
| 370 | printf("GPIOC PDDR, PDIR: %08x %08x\n", GPIOC_PDIR, GPIOC_PDDR); |
| 371 | printf("GPIOD PDDR, PDIR: %08x %08x\n", GPIOD_PDIR, GPIOD_PDDR); |
| 372 | printf("PORTB_PCR16: %08x\n", PORTB_PCR16); |
| 373 | printf("PORTC_PCR6: %08x\n", PORTC_PCR6); |
| 374 | printf("PORTD_PCR0: %08x\n", PORTD_PCR0); |
| 375 | |
| 376 | asm("mrs %0, BASEPRI" : "=r"(ret)); |
| 377 | printf("BASEPRI: %d, SHPR: %08x %08x %08x\n", |
| 378 | ret, SCB_SHPR1, SCB_SHPR2, SCB_SHPR3); |
| 379 | |
| 380 | while (1) { |
| 381 | uint32_t i, now; |
| 382 | |
| 383 | now = millis(); |
| 384 | for (i = 0; i < 2; i++) { |
| 385 | if (g.btn_state[i].phase == 0) |
| 386 | continue; |
| 387 | if (now - g.btn_state[i].time > 1) |
| 388 | g.btn_state[i].phase = 0; |
| 389 | } |
| 390 | |
| 391 | // led? |
| 392 | if (CORE_PIN13_PORTREG & CORE_PIN13_BITMASK) { |
| 393 | if ((int)(now - led_time) > 10) |
| 394 | CORE_PIN13_PORTCLEAR = CORE_PIN13_BITMASK; |
| 395 | } |
| 396 | |
| 397 | // something on rawhid? |
| 398 | if (usb_rawhid_available() > 0) |
| 399 | { |
| 400 | ret = usb_rawhid_recv(buf, 20); |
| 401 | if (ret == 64) { |
| 402 | led_time = millis(); |
| 403 | CORE_PIN13_PORTSET = CORE_PIN13_BITMASK; |
| 404 | |
| 405 | do_usb(buf); |
| 406 | } |
| 407 | else { |
| 408 | printf("usb_rawhid_recv: %d\n", ret); |
| 409 | } |
| 410 | } |
| 411 | } |
| 412 | |
| 413 | return 0; |
| 414 | } |