| 1 | /*\r |
| 2 | * at91sam7s USB CDC device implementation\r |
| 3 | *\r |
| 4 | * Copyright (c) 2012, Roel Verdult\r |
| 5 | * All rights reserved.\r |
| 6 | *\r |
| 7 | * Redistribution and use in source and binary forms, with or without\r |
| 8 | * modification, are permitted provided that the following conditions are met:\r |
| 9 | * 1. Redistributions of source code must retain the above copyright\r |
| 10 | * notice, this list of conditions and the following disclaimer.\r |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright\r |
| 12 | * notice, this list of conditions and the following disclaimer in the\r |
| 13 | * documentation and/or other materials provided with the distribution.\r |
| 14 | * 3. Neither the name of the copyright holders nor the\r |
| 15 | * names of its contributors may be used to endorse or promote products\r |
| 16 | * derived from this software without specific prior written permission.\r |
| 17 | *\r |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY\r |
| 19 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\r |
| 20 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\r |
| 21 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY\r |
| 22 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\r |
| 23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\r |
| 24 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND\r |
| 25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\r |
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\r |
| 27 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r |
| 28 | *\r |
| 29 | * based on the "Basic USB Example" from ATMEL (doc6123.pdf)\r |
| 30 | *\r |
| 31 | * @file usb_cdc.c\r |
| 32 | * @brief\r |
| 33 | */\r |
| 34 | \r |
| 35 | #include "usb_cdc.h"\r |
| 36 | #include "config_gpio.h"\r |
| 37 | \r |
| 38 | #define MIN(a, b) (((a) < (b)) ? (a) : (b))\r |
| 39 | #define MAX(a, b) (((a) > (b)) ? (a) : (b))\r |
| 40 | #define AT91C_EP_IN_SIZE 0x40\r |
| 41 | #define AT91C_EP_OUT 1\r |
| 42 | #define AT91C_EP_OUT_SIZE 0x40\r |
| 43 | #define AT91C_EP_IN 2\r |
| 44 | \r |
| 45 | const char devDescriptor[] = {\r |
| 46 | /* Device descriptor */\r |
| 47 | 0x12, // bLength\r |
| 48 | 0x01, // bDescriptorType\r |
| 49 | 0x10,0x01, // Complies with USB Spec. Release (0110h = release 1.10)\r |
| 50 | 0x02, // bDeviceClass: CDC class code\r |
| 51 | 0x00, // bDeviceSubclass: CDC class sub code\r |
| 52 | 0x00, // bDeviceProtocol: CDC Device protocol\r |
| 53 | 0x08, // bMaxPacketSize0\r |
| 54 | 0x2d,0x2d, // Vendor ID (--)\r |
| 55 | 0x4d,0x50, // Product ID (PM), transmitted in reverse\r |
| 56 | 0x01,0x00, // Device release number (0001)\r |
| 57 | 0x01, // iManufacturer // 0x01\r |
| 58 | 0x00, // iProduct\r |
| 59 | 0x00, // SerialNumber\r |
| 60 | 0x01 // bNumConfigs\r |
| 61 | };\r |
| 62 | \r |
| 63 | const char cfgDescriptor[] = {\r |
| 64 | /* ============== CONFIGURATION 1 =========== */\r |
| 65 | /* Configuration 1 descriptor */\r |
| 66 | 0x09, // CbLength\r |
| 67 | 0x02, // CbDescriptorType\r |
| 68 | 0x43, // CwTotalLength 2 EP + Control\r |
| 69 | 0x00,\r |
| 70 | 0x02, // CbNumInterfaces\r |
| 71 | 0x01, // CbConfigurationValue\r |
| 72 | 0x00, // CiConfiguration\r |
| 73 | 0xC0, // CbmAttributes 0xA0\r |
| 74 | 0x00, // CMaxPower\r |
| 75 | \r |
| 76 | /* Communication Class Interface Descriptor Requirement */\r |
| 77 | 0x09, // bLength\r |
| 78 | 0x04, // bDescriptorType\r |
| 79 | 0x00, // bInterfaceNumber\r |
| 80 | 0x00, // bAlternateSetting\r |
| 81 | 0x01, // bNumEndpoints\r |
| 82 | 0x02, // bInterfaceClass\r |
| 83 | 0x02, // bInterfaceSubclass\r |
| 84 | 0x00, // bInterfaceProtocol\r |
| 85 | 0x00, // iInterface\r |
| 86 | \r |
| 87 | /* Header Functional Descriptor */\r |
| 88 | 0x05, // bFunction Length\r |
| 89 | 0x24, // bDescriptor type: CS_INTERFACE\r |
| 90 | 0x00, // bDescriptor subtype: Header Func Desc\r |
| 91 | 0x10, // bcdCDC:1.1\r |
| 92 | 0x01,\r |
| 93 | \r |
| 94 | /* ACM Functional Descriptor */\r |
| 95 | 0x04, // bFunctionLength\r |
| 96 | 0x24, // bDescriptor Type: CS_INTERFACE\r |
| 97 | 0x02, // bDescriptor Subtype: ACM Func Desc\r |
| 98 | 0x00, // bmCapabilities\r |
| 99 | \r |
| 100 | /* Union Functional Descriptor */\r |
| 101 | 0x05, // bFunctionLength\r |
| 102 | 0x24, // bDescriptorType: CS_INTERFACE\r |
| 103 | 0x06, // bDescriptor Subtype: Union Func Desc\r |
| 104 | 0x00, // bMasterInterface: Communication Class Interface\r |
| 105 | 0x01, // bSlaveInterface0: Data Class Interface\r |
| 106 | \r |
| 107 | /* Call Management Functional Descriptor */\r |
| 108 | 0x05, // bFunctionLength\r |
| 109 | 0x24, // bDescriptor Type: CS_INTERFACE\r |
| 110 | 0x01, // bDescriptor Subtype: Call Management Func Desc\r |
| 111 | 0x00, // bmCapabilities: D1 + D0\r |
| 112 | 0x01, // bDataInterface: Data Class Interface 1\r |
| 113 | \r |
| 114 | /* Endpoint 1 descriptor */\r |
| 115 | 0x07, // bLength\r |
| 116 | 0x05, // bDescriptorType\r |
| 117 | 0x83, // bEndpointAddress, Endpoint 03 - IN\r |
| 118 | 0x03, // bmAttributes INT\r |
| 119 | 0x08, // wMaxPacketSize\r |
| 120 | 0x00,\r |
| 121 | 0xFF, // bInterval\r |
| 122 | \r |
| 123 | /* Data Class Interface Descriptor Requirement */\r |
| 124 | 0x09, // bLength\r |
| 125 | 0x04, // bDescriptorType\r |
| 126 | 0x01, // bInterfaceNumber\r |
| 127 | 0x00, // bAlternateSetting\r |
| 128 | 0x02, // bNumEndpoints\r |
| 129 | 0x0A, // bInterfaceClass\r |
| 130 | 0x00, // bInterfaceSubclass\r |
| 131 | 0x00, // bInterfaceProtocol\r |
| 132 | 0x00, // iInterface\r |
| 133 | \r |
| 134 | /* First alternate setting */\r |
| 135 | /* Endpoint 1 descriptor */\r |
| 136 | 0x07, // bLength\r |
| 137 | 0x05, // bDescriptorType\r |
| 138 | 0x01, // bEndpointAddress, Endpoint 01 - OUT\r |
| 139 | 0x02, // bmAttributes BULK\r |
| 140 | AT91C_EP_OUT_SIZE, // wMaxPacketSize\r |
| 141 | 0x00,\r |
| 142 | 0x00, // bInterval\r |
| 143 | \r |
| 144 | /* Endpoint 2 descriptor */\r |
| 145 | 0x07, // bLength\r |
| 146 | 0x05, // bDescriptorType\r |
| 147 | 0x82, // bEndpointAddress, Endpoint 02 - IN\r |
| 148 | 0x02, // bmAttributes BULK\r |
| 149 | AT91C_EP_IN_SIZE, // wMaxPacketSize\r |
| 150 | 0x00,\r |
| 151 | 0x00 // bInterval\r |
| 152 | };\r |
| 153 | \r |
| 154 | const char strDescriptor[] = {\r |
| 155 | 26, // Length\r |
| 156 | 0x03, // Type is string\r |
| 157 | 'p', 0x00,\r |
| 158 | 'r', 0x00,\r |
| 159 | 'o', 0x00,\r |
| 160 | 'x', 0x00,\r |
| 161 | 'm', 0x00,\r |
| 162 | 'a', 0x00,\r |
| 163 | 'r', 0x00,\r |
| 164 | 'k', 0x00,\r |
| 165 | '.', 0x00,\r |
| 166 | 'o', 0x00,\r |
| 167 | 'r', 0x00,\r |
| 168 | 'g', 0x00,\r |
| 169 | };\r |
| 170 | \r |
| 171 | \r |
| 172 | /* USB standard request code */\r |
| 173 | #define STD_GET_STATUS_ZERO 0x0080\r |
| 174 | #define STD_GET_STATUS_INTERFACE 0x0081\r |
| 175 | #define STD_GET_STATUS_ENDPOINT 0x0082\r |
| 176 | \r |
| 177 | #define STD_CLEAR_FEATURE_ZERO 0x0100\r |
| 178 | #define STD_CLEAR_FEATURE_INTERFACE 0x0101\r |
| 179 | #define STD_CLEAR_FEATURE_ENDPOINT 0x0102\r |
| 180 | \r |
| 181 | #define STD_SET_FEATURE_ZERO 0x0300\r |
| 182 | #define STD_SET_FEATURE_INTERFACE 0x0301\r |
| 183 | #define STD_SET_FEATURE_ENDPOINT 0x0302\r |
| 184 | \r |
| 185 | #define STD_SET_ADDRESS 0x0500\r |
| 186 | #define STD_GET_DESCRIPTOR 0x0680\r |
| 187 | #define STD_SET_DESCRIPTOR 0x0700\r |
| 188 | #define STD_GET_CONFIGURATION 0x0880\r |
| 189 | #define STD_SET_CONFIGURATION 0x0900\r |
| 190 | #define STD_GET_INTERFACE 0x0A81\r |
| 191 | #define STD_SET_INTERFACE 0x0B01\r |
| 192 | #define STD_SYNCH_FRAME 0x0C82\r |
| 193 | \r |
| 194 | /* CDC Class Specific Request Code */\r |
| 195 | #define GET_LINE_CODING 0x21A1\r |
| 196 | #define SET_LINE_CODING 0x2021\r |
| 197 | #define SET_CONTROL_LINE_STATE 0x2221\r |
| 198 | \r |
| 199 | typedef struct {\r |
| 200 | unsigned int dwDTERRate;\r |
| 201 | char bCharFormat;\r |
| 202 | char bParityType;\r |
| 203 | char bDataBits;\r |
| 204 | } AT91S_CDC_LINE_CODING, *AT91PS_CDC_LINE_CODING;\r |
| 205 | \r |
| 206 | AT91S_CDC_LINE_CODING line = {\r |
| 207 | 115200, // baudrate\r |
| 208 | 0, // 1 Stop Bit\r |
| 209 | 0, // None Parity\r |
| 210 | 8}; // 8 Data bits\r |
| 211 | \r |
| 212 | void AT91F_CDC_Enumerate();\r |
| 213 | \r |
| 214 | AT91PS_UDP pUdp = AT91C_BASE_UDP;\r |
| 215 | byte_t btConfiguration = 0;\r |
| 216 | byte_t btConnection = 0;\r |
| 217 | byte_t btReceiveBank = AT91C_UDP_RX_DATA_BK0;\r |
| 218 | \r |
| 219 | //*----------------------------------------------------------------------------\r |
| 220 | //* \fn usb_disable\r |
| 221 | //* \brief This function deactivates the USB device\r |
| 222 | //*----------------------------------------------------------------------------\r |
| 223 | void usb_disable() {\r |
| 224 | // Disconnect the USB device\r |
| 225 | AT91C_BASE_PIOA->PIO_ODR = GPIO_USB_PU;\r |
| 226 | \r |
| 227 | // Clear all lingering interrupts\r |
| 228 | if(pUdp->UDP_ISR & AT91C_UDP_ENDBUSRES) {\r |
| 229 | pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES;\r |
| 230 | }\r |
| 231 | }\r |
| 232 | \r |
| 233 | //*----------------------------------------------------------------------------\r |
| 234 | //* \fn usb_enable\r |
| 235 | //* \brief This function Activates the USB device\r |
| 236 | //*----------------------------------------------------------------------------\r |
| 237 | void usb_enable() {\r |
| 238 | // Set the PLL USB Divider\r |
| 239 | AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ;\r |
| 240 | \r |
| 241 | // Specific Chip USB Initialisation\r |
| 242 | // Enables the 48MHz USB clock UDPCK and System Peripheral USB Clock\r |
| 243 | AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_UDP;\r |
| 244 | AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_UDP);\r |
| 245 | \r |
| 246 | // Enable UDP PullUp (USB_DP_PUP) : enable & Clear of the corresponding PIO\r |
| 247 | // Set in PIO mode and Configure in Output\r |
| 248 | AT91C_BASE_PIOA->PIO_PER = GPIO_USB_PU; // Set in PIO mode\r |
| 249 | AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU; // Configure as Output\r |
| 250 | \r |
| 251 | // Clear for set the Pullup resistor\r |
| 252 | AT91C_BASE_PIOA->PIO_CODR = GPIO_USB_PU;\r |
| 253 | \r |
| 254 | // Disconnect and reconnect USB controller for 100ms\r |
| 255 | usb_disable();\r |
| 256 | \r |
| 257 | // Wait for a short while\r |
| 258 | for (volatile size_t i=0; i<0x100000; i++);\r |
| 259 | \r |
| 260 | // Reconnect USB reconnect\r |
| 261 | AT91C_BASE_PIOA->PIO_SODR = GPIO_USB_PU;\r |
| 262 | AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU;\r |
| 263 | }\r |
| 264 | \r |
| 265 | //*----------------------------------------------------------------------------\r |
| 266 | //* \fn usb_check\r |
| 267 | //* \brief Test if the device is configured and handle enumeration\r |
| 268 | //*----------------------------------------------------------------------------\r |
| 269 | bool usb_check() {\r |
| 270 | AT91_REG isr = pUdp->UDP_ISR;\r |
| 271 | \r |
| 272 | if (isr & AT91C_UDP_ENDBUSRES) {\r |
| 273 | pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES;\r |
| 274 | // reset all endpoints\r |
| 275 | pUdp->UDP_RSTEP = (unsigned int)-1;\r |
| 276 | pUdp->UDP_RSTEP = 0;\r |
| 277 | // Enable the function\r |
| 278 | pUdp->UDP_FADDR = AT91C_UDP_FEN;\r |
| 279 | // Configure endpoint 0\r |
| 280 | pUdp->UDP_CSR[0] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_CTRL);\r |
| 281 | }\r |
| 282 | else if (isr & AT91C_UDP_EPINT0) {\r |
| 283 | pUdp->UDP_ICR = AT91C_UDP_EPINT0;\r |
| 284 | AT91F_CDC_Enumerate();\r |
| 285 | }\r |
| 286 | return (btConfiguration) ? true : false;\r |
| 287 | }\r |
| 288 | \r |
| 289 | \r |
| 290 | bool usb_poll()\r |
| 291 | {\r |
| 292 | if (!usb_check()) return false;\r |
| 293 | return (pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank);\r |
| 294 | }\r |
| 295 | \r |
| 296 | /**\r |
| 297 | In github PR #129, some users appears to get a false positive from\r |
| 298 | usb_poll, which returns true, but the usb_read operation\r |
| 299 | still returns 0.\r |
| 300 | This check is basically the same as above, but also checks\r |
| 301 | that the length available to read is non-zero, thus hopefully fixes the\r |
| 302 | bug.\r |
| 303 | **/\r |
| 304 | bool usb_poll_validate_length()\r |
| 305 | {\r |
| 306 | \r |
| 307 | if (!usb_check()) return false;\r |
| 308 | if (!(pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank)) return false;\r |
| 309 | return (pUdp->UDP_CSR[AT91C_EP_OUT] >> 16) > 0;\r |
| 310 | }\r |
| 311 | \r |
| 312 | //*----------------------------------------------------------------------------\r |
| 313 | //* \fn usb_read\r |
| 314 | //* \brief Read available data from Endpoint OUT\r |
| 315 | //*----------------------------------------------------------------------------\r |
| 316 | uint32_t usb_read(byte_t* data, size_t len) {\r |
| 317 | byte_t bank = btReceiveBank;\r |
| 318 | uint32_t packetSize, nbBytesRcv = 0;\r |
| 319 | uint32_t time_out = 0;\r |
| 320 | \r |
| 321 | while (len) {\r |
| 322 | if (!usb_check()) break;\r |
| 323 | \r |
| 324 | if ( pUdp->UDP_CSR[AT91C_EP_OUT] & bank ) {\r |
| 325 | packetSize = MIN(pUdp->UDP_CSR[AT91C_EP_OUT] >> 16, len);\r |
| 326 | len -= packetSize;\r |
| 327 | while(packetSize--)\r |
| 328 | data[nbBytesRcv++] = pUdp->UDP_FDR[AT91C_EP_OUT];\r |
| 329 | pUdp->UDP_CSR[AT91C_EP_OUT] &= ~(bank);\r |
| 330 | if (bank == AT91C_UDP_RX_DATA_BK0) {\r |
| 331 | bank = AT91C_UDP_RX_DATA_BK1;\r |
| 332 | } else {\r |
| 333 | bank = AT91C_UDP_RX_DATA_BK0;\r |
| 334 | }\r |
| 335 | }\r |
| 336 | if (time_out++ == 0x1fff) break;\r |
| 337 | }\r |
| 338 | \r |
| 339 | btReceiveBank = bank;\r |
| 340 | return nbBytesRcv;\r |
| 341 | }\r |
| 342 | \r |
| 343 | //*----------------------------------------------------------------------------\r |
| 344 | //* \fn usb_write\r |
| 345 | //* \brief Send through endpoint 2\r |
| 346 | //*----------------------------------------------------------------------------\r |
| 347 | uint32_t usb_write(const byte_t* data, const size_t len) {\r |
| 348 | size_t length = len;\r |
| 349 | uint32_t cpt = 0;\r |
| 350 | \r |
| 351 | if (!length) return 0;\r |
| 352 | if (!usb_check()) return 0;\r |
| 353 | \r |
| 354 | // Send the first packet\r |
| 355 | cpt = MIN(length, AT91C_EP_IN_SIZE-1);\r |
| 356 | length -= cpt;\r |
| 357 | while (cpt--) pUdp->UDP_FDR[AT91C_EP_IN] = *data++;\r |
| 358 | pUdp->UDP_CSR[AT91C_EP_IN] |= AT91C_UDP_TXPKTRDY;\r |
| 359 | \r |
| 360 | while (length) {\r |
| 361 | // Fill the second bank\r |
| 362 | cpt = MIN(length, AT91C_EP_IN_SIZE-1);\r |
| 363 | length -= cpt;\r |
| 364 | while (cpt--) pUdp->UDP_FDR[AT91C_EP_IN] = *data++;\r |
| 365 | // Wait for the first bank to be sent\r |
| 366 | while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {\r |
| 367 | if (!usb_check()) return length;\r |
| 368 | }\r |
| 369 | pUdp->UDP_CSR[AT91C_EP_IN] &= ~(AT91C_UDP_TXCOMP);\r |
| 370 | while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP);\r |
| 371 | pUdp->UDP_CSR[AT91C_EP_IN] |= AT91C_UDP_TXPKTRDY;\r |
| 372 | }\r |
| 373 | \r |
| 374 | // Wait for the end of transfer\r |
| 375 | while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {\r |
| 376 | if (!usb_check()) return length;\r |
| 377 | }\r |
| 378 | \r |
| 379 | pUdp->UDP_CSR[AT91C_EP_IN] &= ~(AT91C_UDP_TXCOMP);\r |
| 380 | while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP);\r |
| 381 | \r |
| 382 | return length;\r |
| 383 | }\r |
| 384 | \r |
| 385 | //*----------------------------------------------------------------------------\r |
| 386 | //* \fn AT91F_USB_SendData\r |
| 387 | //* \brief Send Data through the control endpoint\r |
| 388 | //*----------------------------------------------------------------------------\r |
| 389 | unsigned int csrTab[100] = {0x00};\r |
| 390 | unsigned char csrIdx = 0;\r |
| 391 | \r |
| 392 | static void AT91F_USB_SendData(AT91PS_UDP pUdp, const char *pData, uint32_t length) {\r |
| 393 | uint32_t cpt = 0;\r |
| 394 | AT91_REG csr;\r |
| 395 | \r |
| 396 | do {\r |
| 397 | cpt = MIN(length, 8);\r |
| 398 | length -= cpt;\r |
| 399 | \r |
| 400 | while (cpt--)\r |
| 401 | pUdp->UDP_FDR[0] = *pData++;\r |
| 402 | \r |
| 403 | if (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP) {\r |
| 404 | pUdp->UDP_CSR[0] &= ~(AT91C_UDP_TXCOMP);\r |
| 405 | while (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP);\r |
| 406 | }\r |
| 407 | \r |
| 408 | pUdp->UDP_CSR[0] |= AT91C_UDP_TXPKTRDY;\r |
| 409 | do {\r |
| 410 | csr = pUdp->UDP_CSR[0];\r |
| 411 | \r |
| 412 | // Data IN stage has been stopped by a status OUT\r |
| 413 | if (csr & AT91C_UDP_RX_DATA_BK0) {\r |
| 414 | pUdp->UDP_CSR[0] &= ~(AT91C_UDP_RX_DATA_BK0);\r |
| 415 | return;\r |
| 416 | }\r |
| 417 | } while ( !(csr & AT91C_UDP_TXCOMP) );\r |
| 418 | \r |
| 419 | } while (length);\r |
| 420 | \r |
| 421 | if (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP) {\r |
| 422 | pUdp->UDP_CSR[0] &= ~(AT91C_UDP_TXCOMP);\r |
| 423 | while (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP);\r |
| 424 | }\r |
| 425 | }\r |
| 426 | \r |
| 427 | //*----------------------------------------------------------------------------\r |
| 428 | //* \fn AT91F_USB_SendZlp\r |
| 429 | //* \brief Send zero length packet through the control endpoint\r |
| 430 | //*----------------------------------------------------------------------------\r |
| 431 | void AT91F_USB_SendZlp(AT91PS_UDP pUdp) {\r |
| 432 | pUdp->UDP_CSR[0] |= AT91C_UDP_TXPKTRDY;\r |
| 433 | while ( !(pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP) );\r |
| 434 | pUdp->UDP_CSR[0] &= ~(AT91C_UDP_TXCOMP);\r |
| 435 | while (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP);\r |
| 436 | }\r |
| 437 | \r |
| 438 | //*----------------------------------------------------------------------------\r |
| 439 | //* \fn AT91F_USB_SendStall\r |
| 440 | //* \brief Stall the control endpoint\r |
| 441 | //*----------------------------------------------------------------------------\r |
| 442 | void AT91F_USB_SendStall(AT91PS_UDP pUdp) {\r |
| 443 | pUdp->UDP_CSR[0] |= AT91C_UDP_FORCESTALL;\r |
| 444 | while ( !(pUdp->UDP_CSR[0] & AT91C_UDP_ISOERROR) );\r |
| 445 | pUdp->UDP_CSR[0] &= ~(AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR);\r |
| 446 | while (pUdp->UDP_CSR[0] & (AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR));\r |
| 447 | }\r |
| 448 | \r |
| 449 | //*----------------------------------------------------------------------------\r |
| 450 | //* \fn AT91F_CDC_Enumerate\r |
| 451 | //* \brief This function is a callback invoked when a SETUP packet is received\r |
| 452 | //*----------------------------------------------------------------------------\r |
| 453 | void AT91F_CDC_Enumerate() {\r |
| 454 | byte_t bmRequestType, bRequest;\r |
| 455 | uint16_t wValue, wIndex, wLength, wStatus;\r |
| 456 | \r |
| 457 | if ( !(pUdp->UDP_CSR[0] & AT91C_UDP_RXSETUP) )\r |
| 458 | return;\r |
| 459 | \r |
| 460 | bmRequestType = pUdp->UDP_FDR[0];\r |
| 461 | bRequest = pUdp->UDP_FDR[0];\r |
| 462 | wValue = (pUdp->UDP_FDR[0] & 0xFF);\r |
| 463 | wValue |= (pUdp->UDP_FDR[0] << 8);\r |
| 464 | wIndex = (pUdp->UDP_FDR[0] & 0xFF);\r |
| 465 | wIndex |= (pUdp->UDP_FDR[0] << 8);\r |
| 466 | wLength = (pUdp->UDP_FDR[0] & 0xFF);\r |
| 467 | wLength |= (pUdp->UDP_FDR[0] << 8);\r |
| 468 | \r |
| 469 | if (bmRequestType & 0x80) {\r |
| 470 | pUdp->UDP_CSR[0] |= AT91C_UDP_DIR;\r |
| 471 | while ( !(pUdp->UDP_CSR[0] & AT91C_UDP_DIR) );\r |
| 472 | }\r |
| 473 | pUdp->UDP_CSR[0] &= ~AT91C_UDP_RXSETUP;\r |
| 474 | while ( (pUdp->UDP_CSR[0] & AT91C_UDP_RXSETUP) );\r |
| 475 | \r |
| 476 | // Handle supported standard device request Cf Table 9-3 in USB specification Rev 1.1\r |
| 477 | switch ((bRequest << 8) | bmRequestType) {\r |
| 478 | case STD_GET_DESCRIPTOR:\r |
| 479 | if (wValue == 0x100) // Return Device Descriptor\r |
| 480 | AT91F_USB_SendData(pUdp, devDescriptor, MIN(sizeof(devDescriptor), wLength));\r |
| 481 | else if (wValue == 0x200) // Return Configuration Descriptor\r |
| 482 | AT91F_USB_SendData(pUdp, cfgDescriptor, MIN(sizeof(cfgDescriptor), wLength));\r |
| 483 | else if ((wValue & 0x300) == 0x300) // Return String Descriptor\r |
| 484 | AT91F_USB_SendData(pUdp, strDescriptor, MIN(sizeof(strDescriptor), wLength));\r |
| 485 | else\r |
| 486 | AT91F_USB_SendStall(pUdp);\r |
| 487 | break;\r |
| 488 | case STD_SET_ADDRESS:\r |
| 489 | AT91F_USB_SendZlp(pUdp);\r |
| 490 | pUdp->UDP_FADDR = (AT91C_UDP_FEN | wValue);\r |
| 491 | pUdp->UDP_GLBSTATE = (wValue) ? AT91C_UDP_FADDEN : 0;\r |
| 492 | break;\r |
| 493 | case STD_SET_CONFIGURATION:\r |
| 494 | btConfiguration = wValue;\r |
| 495 | AT91F_USB_SendZlp(pUdp);\r |
| 496 | pUdp->UDP_GLBSTATE = (wValue) ? AT91C_UDP_CONFG : AT91C_UDP_FADDEN;\r |
| 497 | pUdp->UDP_CSR[1] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT) : 0;\r |
| 498 | pUdp->UDP_CSR[2] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN) : 0;\r |
| 499 | pUdp->UDP_CSR[3] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN) : 0;\r |
| 500 | break;\r |
| 501 | case STD_GET_CONFIGURATION:\r |
| 502 | AT91F_USB_SendData(pUdp, (char *) &(btConfiguration), sizeof(btConfiguration));\r |
| 503 | break;\r |
| 504 | case STD_GET_STATUS_ZERO:\r |
| 505 | wStatus = 0;\r |
| 506 | AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r |
| 507 | break;\r |
| 508 | case STD_GET_STATUS_INTERFACE:\r |
| 509 | wStatus = 0;\r |
| 510 | AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r |
| 511 | break;\r |
| 512 | case STD_GET_STATUS_ENDPOINT:\r |
| 513 | wStatus = 0;\r |
| 514 | wIndex &= 0x0F;\r |
| 515 | if ((pUdp->UDP_GLBSTATE & AT91C_UDP_CONFG) && (wIndex <= 3)) {\r |
| 516 | wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;\r |
| 517 | AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r |
| 518 | }\r |
| 519 | else if ((pUdp->UDP_GLBSTATE & AT91C_UDP_FADDEN) && (wIndex == 0)) {\r |
| 520 | wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;\r |
| 521 | AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r |
| 522 | }\r |
| 523 | else\r |
| 524 | AT91F_USB_SendStall(pUdp);\r |
| 525 | break;\r |
| 526 | case STD_SET_FEATURE_ZERO:\r |
| 527 | AT91F_USB_SendStall(pUdp);\r |
| 528 | break;\r |
| 529 | case STD_SET_FEATURE_INTERFACE:\r |
| 530 | AT91F_USB_SendZlp(pUdp);\r |
| 531 | break;\r |
| 532 | case STD_SET_FEATURE_ENDPOINT:\r |
| 533 | wIndex &= 0x0F;\r |
| 534 | if ((wValue == 0) && wIndex && (wIndex <= 3)) {\r |
| 535 | pUdp->UDP_CSR[wIndex] = 0;\r |
| 536 | AT91F_USB_SendZlp(pUdp);\r |
| 537 | }\r |
| 538 | else\r |
| 539 | AT91F_USB_SendStall(pUdp);\r |
| 540 | break;\r |
| 541 | case STD_CLEAR_FEATURE_ZERO:\r |
| 542 | AT91F_USB_SendStall(pUdp);\r |
| 543 | break;\r |
| 544 | case STD_CLEAR_FEATURE_INTERFACE:\r |
| 545 | AT91F_USB_SendZlp(pUdp);\r |
| 546 | break;\r |
| 547 | case STD_CLEAR_FEATURE_ENDPOINT:\r |
| 548 | wIndex &= 0x0F;\r |
| 549 | if ((wValue == 0) && wIndex && (wIndex <= 3)) {\r |
| 550 | if (wIndex == 1)\r |
| 551 | pUdp->UDP_CSR[1] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT);\r |
| 552 | else if (wIndex == 2)\r |
| 553 | pUdp->UDP_CSR[2] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN);\r |
| 554 | else if (wIndex == 3)\r |
| 555 | pUdp->UDP_CSR[3] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_ISO_IN);\r |
| 556 | AT91F_USB_SendZlp(pUdp);\r |
| 557 | }\r |
| 558 | else\r |
| 559 | AT91F_USB_SendStall(pUdp);\r |
| 560 | break;\r |
| 561 | \r |
| 562 | // handle CDC class requests\r |
| 563 | case SET_LINE_CODING:\r |
| 564 | while ( !(pUdp->UDP_CSR[0] & AT91C_UDP_RX_DATA_BK0) );\r |
| 565 | pUdp->UDP_CSR[0] &= ~(AT91C_UDP_RX_DATA_BK0);\r |
| 566 | AT91F_USB_SendZlp(pUdp);\r |
| 567 | break;\r |
| 568 | case GET_LINE_CODING:\r |
| 569 | AT91F_USB_SendData(pUdp, (char *) &line, MIN(sizeof(line), wLength));\r |
| 570 | break;\r |
| 571 | case SET_CONTROL_LINE_STATE:\r |
| 572 | btConnection = wValue;\r |
| 573 | AT91F_USB_SendZlp(pUdp);\r |
| 574 | break;\r |
| 575 | default:\r |
| 576 | AT91F_USB_SendStall(pUdp);\r |
| 577 | break;\r |
| 578 | }\r |
| 579 | }\r |