paul@0 | 1 | /* |
paul@0 | 2 | * Ben NanoNote and Arduino USB Host shield communication. |
paul@0 | 3 | * |
paul@0 | 4 | * Copyright 2013 Paul Boddie |
paul@0 | 5 | * |
paul@0 | 6 | * SPI functions derived from those in lib/atben.c by Werner Almesberger: |
paul@0 | 7 | * |
paul@0 | 8 | * Copyright 2010-2011 Werner Almesberger |
paul@0 | 9 | * |
paul@0 | 10 | * This program is free software; you can redistribute it and/or modify |
paul@0 | 11 | * it under the terms of the GNU General Public License as published by |
paul@0 | 12 | * the Free Software Foundation; either version 2 of the License, or |
paul@0 | 13 | * (at your option) any later version. |
paul@0 | 14 | */ |
paul@0 | 15 | |
paul@0 | 16 | #include <ubb/ubb.h> |
paul@0 | 17 | #include <stdio.h> |
paul@0 | 18 | #include <time.h> |
paul@1 | 19 | #include <unistd.h> |
paul@0 | 20 | |
paul@0 | 21 | /* Pin assignments: |
paul@0 | 22 | * |
paul@0 | 23 | * Sniffer UBB Shield |
paul@0 | 24 | * ------- ---- ------ |
paul@0 | 25 | * DAT2 DAT2 9 (INT) |
paul@0 | 26 | * CD DAT3 10 (SS) |
paul@0 | 27 | * CMD CMD 7 (RESET) |
paul@0 | 28 | * VCC VDD VIN |
paul@0 | 29 | * CLK CLK 13 (SCLK) |
paul@0 | 30 | * GND GND GND |
paul@0 | 31 | * DAT0 DAT0 11 (MOSI) |
paul@0 | 32 | * DAT1 DAT1 12 (MISO) |
paul@0 | 33 | * 8 (GPX) (not assigned) |
paul@0 | 34 | */ |
paul@0 | 35 | |
paul@0 | 36 | #define MAX_RESET UBB_CMD |
paul@0 | 37 | #define MAX_SCLK UBB_CLK |
paul@0 | 38 | #define MAX_MOSI UBB_DAT0 |
paul@0 | 39 | #define MAX_MISO UBB_DAT1 |
paul@0 | 40 | #define MAX_INT UBB_DAT2 |
paul@0 | 41 | #define MAX_SS UBB_DAT3 |
paul@0 | 42 | |
paul@0 | 43 | /* MAX3421E definitions. */ |
paul@0 | 44 | |
paul@0 | 45 | #define MAX_REG_READ 0x00 |
paul@0 | 46 | #define MAX_REG_WRITE 0x02 |
paul@0 | 47 | |
paul@1 | 48 | #define MAX_REG_USBIRQ 13 |
paul@0 | 49 | #define MAX_REG_USBCTL 15 |
paul@0 | 50 | #define MAX_REG_PINCTL 17 |
paul@0 | 51 | #define MAX_REG_REVISION 18 |
paul@1 | 52 | #define MAX_REG_HIRQ 25 |
paul@0 | 53 | #define MAX_REG_MODE 27 |
paul@0 | 54 | #define MAX_REG_HRSL 31 |
paul@0 | 55 | |
paul@1 | 56 | #define MAX_USBIRQ_OSCOKIRQ 1 |
paul@1 | 57 | |
paul@0 | 58 | #define MAX_USBCTL_PWRDOWN 16 |
paul@0 | 59 | #define MAX_USBCTL_CHIPRES 32 |
paul@0 | 60 | |
paul@0 | 61 | #define MAX_PINCTL_POSINT_LOW 0 |
paul@0 | 62 | #define MAX_PINCTL_POSINT_HIGH 4 |
paul@0 | 63 | #define MAX_PINCTL_INTLEVEL_EDGE 0 |
paul@0 | 64 | #define MAX_PINCTL_INTLEVEL_LEVEL 8 |
paul@0 | 65 | #define MAX_PINCTL_FDUPSPI_HALF 0 |
paul@0 | 66 | #define MAX_PINCTL_FDUPSPI_FULL 16 |
paul@0 | 67 | |
paul@1 | 68 | #define MAX_HIRQ_BUSEVENTIRQ 1 |
paul@1 | 69 | |
paul@0 | 70 | #define MAX_MODE_PERIPHERAL 0 |
paul@0 | 71 | #define MAX_MODE_HOST 1 |
paul@0 | 72 | #define MAX_MODE_SEPIRQ_OFF 0 |
paul@0 | 73 | #define MAX_MODE_SEPIRQ_ON 16 |
paul@0 | 74 | #define MAX_MODE_DMPULLDN 64 |
paul@0 | 75 | #define MAX_MODE_DPPULLDN 128 |
paul@0 | 76 | |
paul@0 | 77 | #define max_reg(n) ((uint8_t) (n << 3)) |
paul@0 | 78 | #define max_reg_read(n) (max_reg(n) | MAX_REG_READ) |
paul@0 | 79 | #define max_reg_write(n) (max_reg(n) | MAX_REG_WRITE) |
paul@0 | 80 | |
paul@0 | 81 | struct timespec tCSS = {0, 20}, |
paul@0 | 82 | tL = {0, 30}, |
paul@0 | 83 | tCSW = {0, 200}, |
paul@0 | 84 | tCL = {0, 17}, |
paul@0 | 85 | tCH = {0, 17}, |
paul@0 | 86 | tDS = {0, 5}, |
paul@0 | 87 | tDH = {0, 10}, |
paul@0 | 88 | tDO = {0, 15}, |
paul@0 | 89 | tDI = {0, 15}, |
paul@0 | 90 | tON = {0, 4}, |
paul@0 | 91 | tRESET = {0, 200}, |
paul@0 | 92 | tTEST = {0, 100}; |
paul@0 | 93 | |
paul@0 | 94 | void spi_begin() |
paul@0 | 95 | { |
paul@0 | 96 | CLR(MAX_SS); |
paul@0 | 97 | nanosleep(&tL, NULL); /* tCSS is the minimum, but tL is more conservative */ |
paul@0 | 98 | } |
paul@0 | 99 | |
paul@0 | 100 | void spi_end() |
paul@0 | 101 | { |
paul@0 | 102 | SET(MAX_SS); |
paul@0 | 103 | nanosleep(&tCSW, NULL); |
paul@0 | 104 | } |
paul@0 | 105 | |
paul@0 | 106 | /** |
paul@0 | 107 | * Send the given value via MOSI while receiving a value via MISO. |
paul@0 | 108 | * This requires full-duplex SPI and will produce a status value for the first |
paul@0 | 109 | * value sent (the command). |
paul@0 | 110 | */ |
paul@0 | 111 | uint8_t spi_sendrecv(uint8_t v) |
paul@0 | 112 | { |
paul@0 | 113 | uint8_t result = 0; |
paul@0 | 114 | uint8_t mask; |
paul@0 | 115 | |
paul@0 | 116 | for (mask = 0x80; mask; mask >>= 1) |
paul@0 | 117 | { |
paul@0 | 118 | if (v & mask) |
paul@0 | 119 | { |
paul@0 | 120 | printf("1"); |
paul@0 | 121 | SET(MAX_MOSI); |
paul@0 | 122 | } |
paul@0 | 123 | else |
paul@0 | 124 | { |
paul@0 | 125 | printf("0"); |
paul@0 | 126 | CLR(MAX_MOSI); |
paul@0 | 127 | } |
paul@0 | 128 | |
paul@0 | 129 | /* Wait for stable output signal. */ |
paul@0 | 130 | |
paul@0 | 131 | nanosleep(&tDS, NULL); |
paul@0 | 132 | |
paul@0 | 133 | SET(MAX_SCLK); |
paul@0 | 134 | |
paul@0 | 135 | if (PIN(MAX_MISO)) |
paul@0 | 136 | result |= mask; |
paul@0 | 137 | |
paul@0 | 138 | nanosleep(&tCH, NULL); |
paul@0 | 139 | CLR(MAX_SCLK); |
paul@0 | 140 | nanosleep(&tCL, NULL); |
paul@0 | 141 | } |
paul@0 | 142 | |
paul@0 | 143 | printf("\n"); |
paul@0 | 144 | return result; |
paul@0 | 145 | } |
paul@0 | 146 | |
paul@0 | 147 | void spi_send(uint8_t v) |
paul@0 | 148 | { |
paul@0 | 149 | uint8_t mask; |
paul@0 | 150 | |
paul@0 | 151 | OUT(MAX_MOSI); |
paul@0 | 152 | |
paul@0 | 153 | for (mask = 0x80; mask; mask >>= 1) |
paul@0 | 154 | { |
paul@0 | 155 | if (v & mask) |
paul@0 | 156 | { |
paul@0 | 157 | printf("1"); |
paul@0 | 158 | SET(MAX_MOSI); |
paul@0 | 159 | } |
paul@0 | 160 | else |
paul@0 | 161 | { |
paul@0 | 162 | printf("0"); |
paul@0 | 163 | CLR(MAX_MOSI); |
paul@0 | 164 | } |
paul@0 | 165 | |
paul@0 | 166 | nanosleep(&tDS, NULL); |
paul@0 | 167 | |
paul@0 | 168 | SET(MAX_SCLK); |
paul@0 | 169 | nanosleep(&tCH, NULL); |
paul@0 | 170 | CLR(MAX_SCLK); |
paul@0 | 171 | nanosleep(&tDO, NULL); |
paul@0 | 172 | } |
paul@0 | 173 | |
paul@0 | 174 | printf("\n"); |
paul@0 | 175 | } |
paul@0 | 176 | |
paul@0 | 177 | uint8_t spi_recv() |
paul@0 | 178 | { |
paul@0 | 179 | uint8_t mask, result = 0; |
paul@0 | 180 | |
paul@0 | 181 | IN(MAX_MOSI); |
paul@0 | 182 | |
paul@0 | 183 | for (mask = 0x80; mask; mask >>= 1) |
paul@0 | 184 | { |
paul@0 | 185 | nanosleep(&tON, NULL); |
paul@0 | 186 | |
paul@0 | 187 | SET(MAX_SCLK); |
paul@0 | 188 | |
paul@0 | 189 | if (PIN(MAX_MOSI)) |
paul@0 | 190 | { |
paul@0 | 191 | printf("1"); |
paul@0 | 192 | result |= mask; |
paul@0 | 193 | } |
paul@0 | 194 | else |
paul@0 | 195 | printf("0"); |
paul@0 | 196 | |
paul@0 | 197 | nanosleep(&tCH, NULL); |
paul@0 | 198 | CLR(MAX_SCLK); |
paul@0 | 199 | nanosleep(&tDO, NULL); |
paul@0 | 200 | } |
paul@0 | 201 | |
paul@0 | 202 | printf("\n"); |
paul@0 | 203 | return result; |
paul@0 | 204 | } |
paul@0 | 205 | |
paul@1 | 206 | void chipreset() |
paul@1 | 207 | { |
paul@1 | 208 | printf("Resetting...\n"); |
paul@1 | 209 | spi_begin(); |
paul@1 | 210 | spi_sendrecv(max_reg_write(MAX_REG_USBCTL)); |
paul@1 | 211 | spi_sendrecv(MAX_USBCTL_CHIPRES); |
paul@1 | 212 | spi_end(); |
paul@1 | 213 | |
paul@1 | 214 | printf("Clearing the reset...\n"); |
paul@1 | 215 | spi_begin(); |
paul@1 | 216 | spi_sendrecv(max_reg_write(MAX_REG_USBCTL)); |
paul@1 | 217 | spi_sendrecv(0); |
paul@1 | 218 | spi_end(); |
paul@1 | 219 | } |
paul@1 | 220 | |
paul@1 | 221 | uint8_t wait() |
paul@1 | 222 | { |
paul@1 | 223 | uint8_t status = 0, oscillator = 0; |
paul@1 | 224 | |
paul@1 | 225 | /* Wait for the oscillator before performing USB activity. */ |
paul@1 | 226 | |
paul@1 | 227 | printf("Waiting...\n"); |
paul@1 | 228 | |
paul@1 | 229 | while (!oscillator) |
paul@1 | 230 | { |
paul@1 | 231 | spi_begin(); |
paul@1 | 232 | spi_send(max_reg_read(MAX_REG_USBIRQ)); |
paul@1 | 233 | oscillator = spi_recv(); |
paul@1 | 234 | spi_end(); |
paul@1 | 235 | |
paul@1 | 236 | oscillator = oscillator & MAX_USBIRQ_OSCOKIRQ; |
paul@1 | 237 | if (!oscillator) |
paul@1 | 238 | usleep(3000); /* 3ms */ |
paul@1 | 239 | } |
paul@1 | 240 | |
paul@1 | 241 | return status; |
paul@1 | 242 | } |
paul@1 | 243 | |
paul@1 | 244 | void reset() |
paul@1 | 245 | { |
paul@1 | 246 | SET(MAX_RESET); |
paul@1 | 247 | nanosleep(&tRESET, NULL); |
paul@1 | 248 | CLR(MAX_RESET); |
paul@1 | 249 | } |
paul@1 | 250 | |
paul@0 | 251 | int main(int argc, char *argv[]) |
paul@0 | 252 | { |
paul@0 | 253 | uint8_t status = 0, revision = 0, hrsl = 0; |
paul@0 | 254 | |
paul@0 | 255 | if (ubb_open(0) < 0) { |
paul@0 | 256 | perror("ubb_open"); |
paul@0 | 257 | return 1; |
paul@0 | 258 | } |
paul@0 | 259 | |
paul@0 | 260 | ubb_power(1); |
paul@0 | 261 | printf("Power on.\n"); |
paul@0 | 262 | |
paul@0 | 263 | OUT(MAX_SS); |
paul@0 | 264 | OUT(MAX_MOSI); |
paul@0 | 265 | OUT(MAX_SCLK); |
paul@0 | 266 | OUT(MAX_RESET); |
paul@0 | 267 | IN(MAX_INT); |
paul@0 | 268 | IN(MAX_MISO); |
paul@0 | 269 | |
paul@0 | 270 | /* Initialise SPI. */ |
paul@0 | 271 | /* Set SS to 1 (or SS~ to 0). */ |
paul@0 | 272 | |
paul@0 | 273 | SET(MAX_SS); |
paul@0 | 274 | CLR(MAX_MOSI); |
paul@0 | 275 | CLR(MAX_SCLK); |
paul@0 | 276 | CLR(MAX_RESET); |
paul@0 | 277 | |
paul@0 | 278 | /* Initialise the MAX3421E. */ |
paul@0 | 279 | |
paul@1 | 280 | reset(); |
paul@1 | 281 | wait(); |
paul@1 | 282 | |
paul@0 | 283 | /* Set full-duplex, interrupt signalling. */ |
paul@0 | 284 | |
paul@0 | 285 | printf("Setting pin control...\n"); |
paul@0 | 286 | spi_begin(); |
paul@0 | 287 | spi_sendrecv(max_reg_write(MAX_REG_PINCTL)); |
paul@0 | 288 | spi_sendrecv(MAX_PINCTL_INTLEVEL_LEVEL | MAX_PINCTL_FDUPSPI_FULL); |
paul@0 | 289 | spi_end(); |
paul@0 | 290 | printf("INT set to %d\n", PIN(MAX_INT)); |
paul@0 | 291 | |
paul@0 | 292 | /* Set host mode. */ |
paul@0 | 293 | |
paul@0 | 294 | printf("Setting mode...\n"); |
paul@0 | 295 | spi_begin(); |
paul@0 | 296 | spi_sendrecv(max_reg_write(MAX_REG_MODE)); |
paul@0 | 297 | spi_sendrecv(MAX_MODE_HOST | MAX_MODE_SEPIRQ_OFF | MAX_MODE_DMPULLDN | MAX_MODE_DPPULLDN); |
paul@0 | 298 | spi_end(); |
paul@0 | 299 | printf("INT set to %d\n", PIN(MAX_INT)); |
paul@0 | 300 | |
paul@0 | 301 | /* Read from the REVISION register. */ |
paul@0 | 302 | |
paul@0 | 303 | printf("Reading...\n"); |
paul@0 | 304 | spi_begin(); |
paul@0 | 305 | status = spi_sendrecv(max_reg_read(MAX_REG_REVISION)); |
paul@0 | 306 | revision = spi_sendrecv(0); |
paul@0 | 307 | spi_end(); |
paul@0 | 308 | printf("Status = %x\n", status); |
paul@0 | 309 | printf("Revision = %x\n", revision); |
paul@0 | 310 | printf("INT set to %d\n", PIN(MAX_INT)); |
paul@0 | 311 | |
paul@1 | 312 | /* Detect bus event. */ |
paul@1 | 313 | |
paul@1 | 314 | if (status & MAX_HIRQ_BUSEVENTIRQ) |
paul@1 | 315 | { |
paul@1 | 316 | printf("Clearing BUSEVENTIRQ...\n"); |
paul@1 | 317 | spi_begin(); |
paul@1 | 318 | status = spi_sendrecv(max_reg(MAX_REG_HIRQ)); |
paul@1 | 319 | spi_sendrecv(MAX_HIRQ_BUSEVENTIRQ); |
paul@1 | 320 | spi_end(); |
paul@1 | 321 | printf("Status = %x\n", status); |
paul@1 | 322 | } |
paul@1 | 323 | |
paul@0 | 324 | printf("HRSL...\n"); |
paul@0 | 325 | spi_begin(); |
paul@0 | 326 | status = spi_sendrecv(max_reg_read(MAX_REG_HRSL)); |
paul@0 | 327 | hrsl = spi_sendrecv(0); |
paul@0 | 328 | spi_end(); |
paul@0 | 329 | printf("Status = %x\n", status); |
paul@0 | 330 | printf("HRSL = %x\n", hrsl); |
paul@0 | 331 | printf("INT set to %d\n", PIN(MAX_INT)); |
paul@0 | 332 | |
paul@0 | 333 | printf("Closing...\n"); |
paul@0 | 334 | ubb_close(0); |
paul@0 | 335 | |
paul@0 | 336 | return 0; |
paul@0 | 337 | } |