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5bcc76c4 | 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 | |
79a73ab2 | 36 | #include "config_gpio.h"\r |
5bcc76c4 | 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 | |
81ee3409 | 54 | 0x2d,0x2d, // Vendor ID (--)\r |
55 | 0x4d,0x50, // Product ID (PM), transmitted in reverse\r | |
5bcc76c4 | 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 | |
cfcd8045 | 84 | 0x00, // bInterfaceProtocol\r |
5bcc76c4 | 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 | |
6e82300d | 219 | //*----------------------------------------------------------------------------\r |
79a73ab2 | 220 | //* \fn usb_disable\r |
6e82300d | 221 | //* \brief This function deactivates the USB device\r |
222 | //*----------------------------------------------------------------------------\r | |
223 | void usb_disable() {\r | |
79a73ab2 | 224 | // Disconnect the USB device\r |
225 | AT91C_BASE_PIOA->PIO_ODR = GPIO_USB_PU;\r | |
6e82300d | 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 | |
5bcc76c4 | 233 | //*----------------------------------------------------------------------------\r |
79a73ab2 | 234 | //* \fn usb_enable\r |
5bcc76c4 | 235 | //* \brief This function Activates the USB device\r |
236 | //*----------------------------------------------------------------------------\r | |
6e82300d | 237 | void usb_enable() {\r |
5bcc76c4 | 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 | |
79a73ab2 | 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 | |
5bcc76c4 | 250 | \r |
79a73ab2 | 251 | // Clear for set the Pullup resistor\r |
252 | AT91C_BASE_PIOA->PIO_CODR = GPIO_USB_PU;\r | |
6e82300d | 253 | \r |
79a73ab2 | 254 | // Disconnect and reconnect USB controller for 100ms\r |
6e82300d | 255 | usb_disable();\r |
256 | \r | |
257 | // Wait for a short while\r | |
28fdb04f | 258 | for (volatile size_t i=0; i<0x100000; i++);\r |
6e82300d | 259 | \r |
260 | // Reconnect USB reconnect\r | |
79a73ab2 | 261 | AT91C_BASE_PIOA->PIO_SODR = GPIO_USB_PU;\r |
262 | AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU;\r | |
5bcc76c4 | 263 | }\r |
264 | \r | |
265 | //*----------------------------------------------------------------------------\r | |
79a73ab2 | 266 | //* \fn usb_check\r |
5bcc76c4 | 267 | //* \brief Test if the device is configured and handle enumeration\r |
268 | //*----------------------------------------------------------------------------\r | |
6e82300d | 269 | bool usb_check() {\r |
5bcc76c4 | 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 | |
79a73ab2 | 297 | //* \fn usb_read\r |
5bcc76c4 | 298 | //* \brief Read available data from Endpoint OUT\r |
299 | //*----------------------------------------------------------------------------\r | |
6e82300d | 300 | uint32_t usb_read(byte_t* data, size_t len) {\r |
5bcc76c4 | 301 | byte_t bank = btReceiveBank;\r |
302 | uint32_t packetSize, nbBytesRcv = 0;\r | |
303 | uint32_t time_out = 0;\r | |
304 | \r | |
23b598ee | 305 | while (len) {\r |
5bcc76c4 | 306 | if (!usb_check()) break;\r |
307 | \r | |
308 | if ( pUdp->UDP_CSR[AT91C_EP_OUT] & bank ) {\r | |
309 | packetSize = MIN(pUdp->UDP_CSR[AT91C_EP_OUT] >> 16, len);\r | |
310 | len -= packetSize;\r | |
311 | while(packetSize--)\r | |
312 | data[nbBytesRcv++] = pUdp->UDP_FDR[AT91C_EP_OUT];\r | |
313 | pUdp->UDP_CSR[AT91C_EP_OUT] &= ~(bank);\r | |
23b598ee | 314 | if (bank == AT91C_UDP_RX_DATA_BK0) {\r |
5bcc76c4 | 315 | bank = AT91C_UDP_RX_DATA_BK1;\r |
316 | } else {\r | |
317 | bank = AT91C_UDP_RX_DATA_BK0;\r | |
318 | }\r | |
319 | }\r | |
320 | if (time_out++ == 0x1fff) break;\r | |
321 | }\r | |
322 | \r | |
323 | btReceiveBank = bank;\r | |
324 | return nbBytesRcv;\r | |
325 | }\r | |
326 | \r | |
327 | //*----------------------------------------------------------------------------\r | |
79a73ab2 | 328 | //* \fn usb_write\r |
5bcc76c4 | 329 | //* \brief Send through endpoint 2\r |
330 | //*----------------------------------------------------------------------------\r | |
6e82300d | 331 | uint32_t usb_write(const byte_t* data, const size_t len) {\r |
5bcc76c4 | 332 | size_t length = len;\r |
333 | uint32_t cpt = 0;\r | |
334 | \r | |
335 | if (!length) return 0;\r | |
336 | if (!usb_check()) return 0;\r | |
337 | \r | |
338 | // Send the first packet\r | |
339 | cpt = MIN(length, AT91C_EP_IN_SIZE-1);\r | |
340 | length -= cpt;\r | |
341 | while (cpt--) pUdp->UDP_FDR[AT91C_EP_IN] = *data++;\r | |
342 | pUdp->UDP_CSR[AT91C_EP_IN] |= AT91C_UDP_TXPKTRDY;\r | |
343 | \r | |
344 | while (length) {\r | |
345 | // Fill the second bank\r | |
346 | cpt = MIN(length, AT91C_EP_IN_SIZE-1);\r | |
347 | length -= cpt;\r | |
348 | while (cpt--) pUdp->UDP_FDR[AT91C_EP_IN] = *data++;\r | |
349 | // Wait for the the first bank to be sent\r | |
350 | while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {\r | |
351 | if (!usb_check()) return length;\r | |
352 | }\r | |
353 | pUdp->UDP_CSR[AT91C_EP_IN] &= ~(AT91C_UDP_TXCOMP);\r | |
354 | while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP);\r | |
355 | pUdp->UDP_CSR[AT91C_EP_IN] |= AT91C_UDP_TXPKTRDY;\r | |
356 | }\r | |
357 | \r | |
358 | // Wait for the end of transfer\r | |
359 | while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {\r | |
360 | if (!usb_check()) return length;\r | |
361 | }\r | |
362 | \r | |
363 | pUdp->UDP_CSR[AT91C_EP_IN] &= ~(AT91C_UDP_TXCOMP);\r | |
364 | while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP);\r | |
365 | \r | |
366 | return length;\r | |
367 | }\r | |
368 | \r | |
369 | //*----------------------------------------------------------------------------\r | |
370 | //* \fn AT91F_USB_SendData\r | |
371 | //* \brief Send Data through the control endpoint\r | |
372 | //*----------------------------------------------------------------------------\r | |
5ee70129 | 373 | unsigned int csrTab[100] = {0x00};\r |
5bcc76c4 | 374 | unsigned char csrIdx = 0;\r |
375 | \r | |
6e82300d | 376 | static void AT91F_USB_SendData(AT91PS_UDP pUdp, const char *pData, uint32_t length) {\r |
5bcc76c4 | 377 | uint32_t cpt = 0;\r |
378 | AT91_REG csr;\r | |
379 | \r | |
380 | do {\r | |
381 | cpt = MIN(length, 8);\r | |
382 | length -= cpt;\r | |
383 | \r | |
384 | while (cpt--)\r | |
385 | pUdp->UDP_FDR[0] = *pData++;\r | |
386 | \r | |
387 | if (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP) {\r | |
388 | pUdp->UDP_CSR[0] &= ~(AT91C_UDP_TXCOMP);\r | |
389 | while (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP);\r | |
390 | }\r | |
391 | \r | |
392 | pUdp->UDP_CSR[0] |= AT91C_UDP_TXPKTRDY;\r | |
393 | do {\r | |
394 | csr = pUdp->UDP_CSR[0];\r | |
395 | \r | |
396 | // Data IN stage has been stopped by a status OUT\r | |
397 | if (csr & AT91C_UDP_RX_DATA_BK0) {\r | |
398 | pUdp->UDP_CSR[0] &= ~(AT91C_UDP_RX_DATA_BK0);\r | |
399 | return;\r | |
400 | }\r | |
401 | } while ( !(csr & AT91C_UDP_TXCOMP) );\r | |
402 | \r | |
403 | } while (length);\r | |
404 | \r | |
405 | if (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP) {\r | |
406 | pUdp->UDP_CSR[0] &= ~(AT91C_UDP_TXCOMP);\r | |
407 | while (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP);\r | |
408 | }\r | |
409 | }\r | |
410 | \r | |
411 | //*----------------------------------------------------------------------------\r | |
412 | //* \fn AT91F_USB_SendZlp\r | |
413 | //* \brief Send zero length packet through the control endpoint\r | |
414 | //*----------------------------------------------------------------------------\r | |
6e82300d | 415 | void AT91F_USB_SendZlp(AT91PS_UDP pUdp) {\r |
5bcc76c4 | 416 | pUdp->UDP_CSR[0] |= AT91C_UDP_TXPKTRDY;\r |
417 | while ( !(pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP) );\r | |
418 | pUdp->UDP_CSR[0] &= ~(AT91C_UDP_TXCOMP);\r | |
419 | while (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP);\r | |
420 | }\r | |
421 | \r | |
422 | //*----------------------------------------------------------------------------\r | |
423 | //* \fn AT91F_USB_SendStall\r | |
424 | //* \brief Stall the control endpoint\r | |
425 | //*----------------------------------------------------------------------------\r | |
6e82300d | 426 | void AT91F_USB_SendStall(AT91PS_UDP pUdp) {\r |
5bcc76c4 | 427 | pUdp->UDP_CSR[0] |= AT91C_UDP_FORCESTALL;\r |
428 | while ( !(pUdp->UDP_CSR[0] & AT91C_UDP_ISOERROR) );\r | |
429 | pUdp->UDP_CSR[0] &= ~(AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR);\r | |
430 | while (pUdp->UDP_CSR[0] & (AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR));\r | |
431 | }\r | |
432 | \r | |
433 | //*----------------------------------------------------------------------------\r | |
434 | //* \fn AT91F_CDC_Enumerate\r | |
435 | //* \brief This function is a callback invoked when a SETUP packet is received\r | |
436 | //*----------------------------------------------------------------------------\r | |
6e82300d | 437 | void AT91F_CDC_Enumerate() {\r |
5bcc76c4 | 438 | byte_t bmRequestType, bRequest;\r |
439 | uint16_t wValue, wIndex, wLength, wStatus;\r | |
440 | \r | |
441 | if ( !(pUdp->UDP_CSR[0] & AT91C_UDP_RXSETUP) )\r | |
442 | return;\r | |
443 | \r | |
444 | bmRequestType = pUdp->UDP_FDR[0];\r | |
445 | bRequest = pUdp->UDP_FDR[0];\r | |
446 | wValue = (pUdp->UDP_FDR[0] & 0xFF);\r | |
447 | wValue |= (pUdp->UDP_FDR[0] << 8);\r | |
448 | wIndex = (pUdp->UDP_FDR[0] & 0xFF);\r | |
449 | wIndex |= (pUdp->UDP_FDR[0] << 8);\r | |
450 | wLength = (pUdp->UDP_FDR[0] & 0xFF);\r | |
451 | wLength |= (pUdp->UDP_FDR[0] << 8);\r | |
452 | \r | |
453 | if (bmRequestType & 0x80) {\r | |
454 | pUdp->UDP_CSR[0] |= AT91C_UDP_DIR;\r | |
455 | while ( !(pUdp->UDP_CSR[0] & AT91C_UDP_DIR) );\r | |
456 | }\r | |
457 | pUdp->UDP_CSR[0] &= ~AT91C_UDP_RXSETUP;\r | |
458 | while ( (pUdp->UDP_CSR[0] & AT91C_UDP_RXSETUP) );\r | |
459 | \r | |
460 | // Handle supported standard device request Cf Table 9-3 in USB specification Rev 1.1\r | |
461 | switch ((bRequest << 8) | bmRequestType) {\r | |
462 | case STD_GET_DESCRIPTOR:\r | |
463 | if (wValue == 0x100) // Return Device Descriptor\r | |
464 | AT91F_USB_SendData(pUdp, devDescriptor, MIN(sizeof(devDescriptor), wLength));\r | |
465 | else if (wValue == 0x200) // Return Configuration Descriptor\r | |
466 | AT91F_USB_SendData(pUdp, cfgDescriptor, MIN(sizeof(cfgDescriptor), wLength));\r | |
467 | else if ((wValue & 0x300) == 0x300) // Return String Descriptor\r | |
468 | AT91F_USB_SendData(pUdp, strDescriptor, MIN(sizeof(strDescriptor), wLength));\r | |
469 | else\r | |
470 | AT91F_USB_SendStall(pUdp);\r | |
471 | break;\r | |
472 | case STD_SET_ADDRESS:\r | |
473 | AT91F_USB_SendZlp(pUdp);\r | |
474 | pUdp->UDP_FADDR = (AT91C_UDP_FEN | wValue);\r | |
475 | pUdp->UDP_GLBSTATE = (wValue) ? AT91C_UDP_FADDEN : 0;\r | |
476 | break;\r | |
477 | case STD_SET_CONFIGURATION:\r | |
478 | btConfiguration = wValue;\r | |
479 | AT91F_USB_SendZlp(pUdp);\r | |
480 | pUdp->UDP_GLBSTATE = (wValue) ? AT91C_UDP_CONFG : AT91C_UDP_FADDEN;\r | |
481 | pUdp->UDP_CSR[1] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT) : 0;\r | |
482 | pUdp->UDP_CSR[2] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN) : 0;\r | |
483 | pUdp->UDP_CSR[3] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN) : 0;\r | |
484 | break;\r | |
485 | case STD_GET_CONFIGURATION:\r | |
486 | AT91F_USB_SendData(pUdp, (char *) &(btConfiguration), sizeof(btConfiguration));\r | |
487 | break;\r | |
488 | case STD_GET_STATUS_ZERO:\r | |
489 | wStatus = 0;\r | |
490 | AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r | |
491 | break;\r | |
492 | case STD_GET_STATUS_INTERFACE:\r | |
493 | wStatus = 0;\r | |
494 | AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r | |
495 | break;\r | |
496 | case STD_GET_STATUS_ENDPOINT:\r | |
497 | wStatus = 0;\r | |
498 | wIndex &= 0x0F;\r | |
499 | if ((pUdp->UDP_GLBSTATE & AT91C_UDP_CONFG) && (wIndex <= 3)) {\r | |
500 | wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;\r | |
501 | AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r | |
502 | }\r | |
503 | else if ((pUdp->UDP_GLBSTATE & AT91C_UDP_FADDEN) && (wIndex == 0)) {\r | |
504 | wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;\r | |
505 | AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r | |
506 | }\r | |
507 | else\r | |
508 | AT91F_USB_SendStall(pUdp);\r | |
509 | break;\r | |
510 | case STD_SET_FEATURE_ZERO:\r | |
511 | AT91F_USB_SendStall(pUdp);\r | |
512 | break;\r | |
513 | case STD_SET_FEATURE_INTERFACE:\r | |
514 | AT91F_USB_SendZlp(pUdp);\r | |
515 | break;\r | |
516 | case STD_SET_FEATURE_ENDPOINT:\r | |
517 | wIndex &= 0x0F;\r | |
518 | if ((wValue == 0) && wIndex && (wIndex <= 3)) {\r | |
519 | pUdp->UDP_CSR[wIndex] = 0;\r | |
520 | AT91F_USB_SendZlp(pUdp);\r | |
521 | }\r | |
522 | else\r | |
523 | AT91F_USB_SendStall(pUdp);\r | |
524 | break;\r | |
525 | case STD_CLEAR_FEATURE_ZERO:\r | |
526 | AT91F_USB_SendStall(pUdp);\r | |
527 | break;\r | |
528 | case STD_CLEAR_FEATURE_INTERFACE:\r | |
529 | AT91F_USB_SendZlp(pUdp);\r | |
530 | break;\r | |
531 | case STD_CLEAR_FEATURE_ENDPOINT:\r | |
532 | wIndex &= 0x0F;\r | |
533 | if ((wValue == 0) && wIndex && (wIndex <= 3)) {\r | |
534 | if (wIndex == 1)\r | |
535 | pUdp->UDP_CSR[1] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT);\r | |
536 | else if (wIndex == 2)\r | |
537 | pUdp->UDP_CSR[2] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN);\r | |
538 | else if (wIndex == 3)\r | |
539 | pUdp->UDP_CSR[3] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_ISO_IN);\r | |
540 | AT91F_USB_SendZlp(pUdp);\r | |
541 | }\r | |
542 | else\r | |
543 | AT91F_USB_SendStall(pUdp);\r | |
544 | break;\r | |
545 | \r | |
546 | // handle CDC class requests\r | |
547 | case SET_LINE_CODING:\r | |
548 | while ( !(pUdp->UDP_CSR[0] & AT91C_UDP_RX_DATA_BK0) );\r | |
549 | pUdp->UDP_CSR[0] &= ~(AT91C_UDP_RX_DATA_BK0);\r | |
550 | AT91F_USB_SendZlp(pUdp);\r | |
551 | break;\r | |
552 | case GET_LINE_CODING:\r | |
553 | AT91F_USB_SendData(pUdp, (char *) &line, MIN(sizeof(line), wLength));\r | |
554 | break;\r | |
555 | case SET_CONTROL_LINE_STATE:\r | |
556 | btConnection = wValue;\r | |
557 | AT91F_USB_SendZlp(pUdp);\r | |
558 | break;\r | |
559 | default:\r | |
560 | AT91F_USB_SendStall(pUdp);\r | |
561 | break;\r | |
562 | }\r | |
563 | }\r |