Point Labs / USBDevice

adds a USB serial port to your design

Dependents:   Example_WatchDog_Timer

USBSerial/USBCDC.cpp@19:fcb63a105965, 2014-02-20 (annotated)

Committer:
mbed_official
Date:
Thu Feb 20 11:15:58 2014 +0000
Revision:
19:fcb63a105965
Parent:
15:849c0c0f2769
Child:
25:7c72828865f3
Child:
64:c7639faed2eb
Synchronized with git revision 87193889326571b560379153239787775654be59



Full URL: https://github.com/mbedmicro/mbed/commit/87193889326571b560379153239787775654be59/



libraries/USBSerial: Allow the USB connection to be non-blocking

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 1:80ab0d068708 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
samux 1:80ab0d068708 2 *
samux 1:80ab0d068708 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 1:80ab0d068708 4 * and associated documentation files (the "Software"), to deal in the Software without
samux 1:80ab0d068708 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
samux 1:80ab0d068708 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
samux 1:80ab0d068708 7 * Software is furnished to do so, subject to the following conditions:
samux 1:80ab0d068708 8 *
samux 1:80ab0d068708 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 1:80ab0d068708 10 * substantial portions of the Software.
samux 1:80ab0d068708 11 *
samux 1:80ab0d068708 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 1:80ab0d068708 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 1:80ab0d068708 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 1:80ab0d068708 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 1:80ab0d068708 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 1:80ab0d068708 17 */
samux 1:80ab0d068708 18
samux 1:80ab0d068708 19 #include "stdint.h"
samux 1:80ab0d068708 20 #include "USBCDC.h"
samux 1:80ab0d068708 21
samux 1:80ab0d068708 22 static uint8_t cdc_line_coding[7]= {0x80, 0x25, 0x00, 0x00, 0x00, 0x00, 0x08};
samux 1:80ab0d068708 23
samux 1:80ab0d068708 24 #define DEFAULT_CONFIGURATION (1)
samux 1:80ab0d068708 25
samux 1:80ab0d068708 26 #define CDC_SET_LINE_CODING 0x20
samux 1:80ab0d068708 27 #define CDC_GET_LINE_CODING 0x21
samux 1:80ab0d068708 28 #define CDC_SET_CONTROL_LINE_STATE 0x22
samux 1:80ab0d068708 29
samux 1:80ab0d068708 30 #define MAX_CDC_REPORT_SIZE MAX_PACKET_SIZE_EPBULK
samux 1:80ab0d068708 31
mbed_official 19:fcb63a105965 32 USBCDC::USBCDC(uint16_t vendor_id, uint16_t product_id, uint16_t product_release, bool connect_blocking): USBDevice(vendor_id, product_id, product_release) {
samux 6:d0945750af57 33 terminal_connected = false;
mbed_official 19:fcb63a105965 34 USBDevice::connect(connect_blocking);
samux 1:80ab0d068708 35 }
samux 1:80ab0d068708 36
samux 1:80ab0d068708 37 bool USBCDC::USBCallback_request(void) {
samux 1:80ab0d068708 38 /* Called in ISR context */
samux 1:80ab0d068708 39
samux 1:80ab0d068708 40 bool success = false;
samux 1:80ab0d068708 41 CONTROL_TRANSFER * transfer = getTransferPtr();
samux 1:80ab0d068708 42
samux 1:80ab0d068708 43 /* Process class-specific requests */
samux 1:80ab0d068708 44
samux 1:80ab0d068708 45 if (transfer->setup.bmRequestType.Type == CLASS_TYPE) {
samux 1:80ab0d068708 46 switch (transfer->setup.bRequest) {
samux 1:80ab0d068708 47 case CDC_GET_LINE_CODING:
samux 1:80ab0d068708 48 transfer->remaining = 7;
samux 1:80ab0d068708 49 transfer->ptr = cdc_line_coding;
samux 1:80ab0d068708 50 transfer->direction = DEVICE_TO_HOST;
samux 1:80ab0d068708 51 success = true;
samux 1:80ab0d068708 52 break;
samux 1:80ab0d068708 53 case CDC_SET_LINE_CODING:
samux 1:80ab0d068708 54 transfer->remaining = 7;
mbed_official 15:849c0c0f2769 55 transfer->notify = true;
samux 1:80ab0d068708 56 success = true;
samux 6:d0945750af57 57 terminal_connected = true;
samux 1:80ab0d068708 58 break;
samux 1:80ab0d068708 59 case CDC_SET_CONTROL_LINE_STATE:
samux 8:335f2506f422 60 terminal_connected = false;
samux 1:80ab0d068708 61 success = true;
samux 1:80ab0d068708 62 break;
samux 1:80ab0d068708 63 default:
samux 1:80ab0d068708 64 break;
samux 1:80ab0d068708 65 }
samux 1:80ab0d068708 66 }
samux 1:80ab0d068708 67
samux 1:80ab0d068708 68 return success;
samux 1:80ab0d068708 69 }
samux 1:80ab0d068708 70
mbed_official 15:849c0c0f2769 71 void USBCDC::USBCallback_requestCompleted(uint8_t *buf, uint32_t length) {
mbed_official 15:849c0c0f2769 72 // Request of setting line coding has 7 bytes
mbed_official 15:849c0c0f2769 73 if (length != 7) {
mbed_official 15:849c0c0f2769 74 return;
mbed_official 15:849c0c0f2769 75 }
mbed_official 15:849c0c0f2769 76
mbed_official 15:849c0c0f2769 77 CONTROL_TRANSFER * transfer = getTransferPtr();
mbed_official 15:849c0c0f2769 78
mbed_official 15:849c0c0f2769 79 /* Process class-specific requests */
mbed_official 15:849c0c0f2769 80 if (transfer->setup.bmRequestType.Type == CLASS_TYPE) {
mbed_official 15:849c0c0f2769 81 if (transfer->setup.bRequest == CDC_SET_LINE_CODING) {
mbed_official 15:849c0c0f2769 82 if (memcmp(cdc_line_coding, buf, 7)) {
mbed_official 15:849c0c0f2769 83 memcpy(cdc_line_coding, buf, 7);
mbed_official 15:849c0c0f2769 84
mbed_official 15:849c0c0f2769 85 int baud = buf[0] + (buf[1] << 8)
mbed_official 15:849c0c0f2769 86 + (buf[2] << 16) + (buf[3] << 24);
mbed_official 15:849c0c0f2769 87 int stop = buf[4];
mbed_official 15:849c0c0f2769 88 int bits = buf[6];
mbed_official 15:849c0c0f2769 89 int parity = buf[5];
mbed_official 15:849c0c0f2769 90
mbed_official 15:849c0c0f2769 91 lineCodingChanged(baud, bits, parity, stop);
mbed_official 15:849c0c0f2769 92 }
mbed_official 15:849c0c0f2769 93 }
mbed_official 15:849c0c0f2769 94 }
mbed_official 15:849c0c0f2769 95 }
samux 1:80ab0d068708 96
samux 1:80ab0d068708 97 // Called in ISR context
samux 1:80ab0d068708 98 // Set configuration. Return false if the
samux 1:80ab0d068708 99 // configuration is not supported.
samux 1:80ab0d068708 100 bool USBCDC::USBCallback_setConfiguration(uint8_t configuration) {
samux 1:80ab0d068708 101 if (configuration != DEFAULT_CONFIGURATION) {
samux 1:80ab0d068708 102 return false;
samux 1:80ab0d068708 103 }
samux 1:80ab0d068708 104
samux 1:80ab0d068708 105 // Configure endpoints > 0
samux 1:80ab0d068708 106 addEndpoint(EPINT_IN, MAX_PACKET_SIZE_EPINT);
samux 1:80ab0d068708 107 addEndpoint(EPBULK_IN, MAX_PACKET_SIZE_EPBULK);
samux 1:80ab0d068708 108 addEndpoint(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
samux 1:80ab0d068708 109
samux 1:80ab0d068708 110 // We activate the endpoint to be able to recceive data
samux 1:80ab0d068708 111 readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
samux 1:80ab0d068708 112 return true;
samux 1:80ab0d068708 113 }
samux 1:80ab0d068708 114
samux 1:80ab0d068708 115 bool USBCDC::send(uint8_t * buffer, uint32_t size) {
samux 1:80ab0d068708 116 return USBDevice::write(EPBULK_IN, buffer, size, MAX_CDC_REPORT_SIZE);
samux 1:80ab0d068708 117 }
samux 1:80ab0d068708 118
samux 1:80ab0d068708 119 bool USBCDC::readEP(uint8_t * buffer, uint32_t * size) {
samux 1:80ab0d068708 120 if (!USBDevice::readEP(EPBULK_OUT, buffer, size, MAX_CDC_REPORT_SIZE))
samux 1:80ab0d068708 121 return false;
samux 1:80ab0d068708 122 if (!readStart(EPBULK_OUT, MAX_CDC_REPORT_SIZE))
samux 1:80ab0d068708 123 return false;
samux 1:80ab0d068708 124 return true;
samux 1:80ab0d068708 125 }
samux 1:80ab0d068708 126
samux 1:80ab0d068708 127 bool USBCDC::readEP_NB(uint8_t * buffer, uint32_t * size) {
samux 1:80ab0d068708 128 if (!USBDevice::readEP_NB(EPBULK_OUT, buffer, size, MAX_CDC_REPORT_SIZE))
samux 1:80ab0d068708 129 return false;
samux 1:80ab0d068708 130 if (!readStart(EPBULK_OUT, MAX_CDC_REPORT_SIZE))
samux 1:80ab0d068708 131 return false;
samux 1:80ab0d068708 132 return true;
samux 1:80ab0d068708 133 }
samux 1:80ab0d068708 134
samux 1:80ab0d068708 135
samux 1:80ab0d068708 136 uint8_t * USBCDC::deviceDesc() {
samux 1:80ab0d068708 137 static uint8_t deviceDescriptor[] = {
samux 1:80ab0d068708 138 18, // bLength
samux 1:80ab0d068708 139 1, // bDescriptorType
samux 1:80ab0d068708 140 0x10, 0x01, // bcdUSB
samux 1:80ab0d068708 141 2, // bDeviceClass
samux 1:80ab0d068708 142 0, // bDeviceSubClass
samux 1:80ab0d068708 143 0, // bDeviceProtocol
samux 1:80ab0d068708 144 MAX_PACKET_SIZE_EP0, // bMaxPacketSize0
bogdanm 11:eeb3cbbaa996 145 (uint8_t)(LSB(VENDOR_ID)), (uint8_t)(MSB(VENDOR_ID)), // idVendor
bogdanm 11:eeb3cbbaa996 146 (uint8_t)(LSB(PRODUCT_ID)), (uint8_t)(MSB(PRODUCT_ID)),// idProduct
samux 1:80ab0d068708 147 0x00, 0x01, // bcdDevice
samux 1:80ab0d068708 148 1, // iManufacturer
samux 1:80ab0d068708 149 2, // iProduct
samux 1:80ab0d068708 150 3, // iSerialNumber
samux 1:80ab0d068708 151 1 // bNumConfigurations
samux 1:80ab0d068708 152 };
samux 1:80ab0d068708 153 return deviceDescriptor;
samux 1:80ab0d068708 154 }
samux 1:80ab0d068708 155
samux 1:80ab0d068708 156 uint8_t * USBCDC::stringIinterfaceDesc() {
samux 1:80ab0d068708 157 static uint8_t stringIinterfaceDescriptor[] = {
samux 1:80ab0d068708 158 0x08,
samux 1:80ab0d068708 159 STRING_DESCRIPTOR,
samux 1:80ab0d068708 160 'C',0,'D',0,'C',0,
samux 1:80ab0d068708 161 };
samux 1:80ab0d068708 162 return stringIinterfaceDescriptor;
samux 1:80ab0d068708 163 }
samux 1:80ab0d068708 164
samux 1:80ab0d068708 165 uint8_t * USBCDC::stringIproductDesc() {
samux 1:80ab0d068708 166 static uint8_t stringIproductDescriptor[] = {
samux 1:80ab0d068708 167 0x16,
samux 1:80ab0d068708 168 STRING_DESCRIPTOR,
samux 1:80ab0d068708 169 'C',0,'D',0,'C',0,' ',0,'D',0,'E',0,'V',0,'I',0,'C',0,'E',0
samux 1:80ab0d068708 170 };
samux 1:80ab0d068708 171 return stringIproductDescriptor;
samux 1:80ab0d068708 172 }
samux 1:80ab0d068708 173
samux 1:80ab0d068708 174
samux 8:335f2506f422 175 #define CONFIG1_DESC_SIZE (9+8+9+5+5+4+5+7+9+7+7)
samux 1:80ab0d068708 176
samux 1:80ab0d068708 177 uint8_t * USBCDC::configurationDesc() {
samux 1:80ab0d068708 178 static uint8_t configDescriptor[] = {
samux 8:335f2506f422 179 // configuration descriptor
samux 8:335f2506f422 180 9, // bLength
samux 8:335f2506f422 181 2, // bDescriptorType
samux 1:80ab0d068708 182 LSB(CONFIG1_DESC_SIZE), // wTotalLength
samux 1:80ab0d068708 183 MSB(CONFIG1_DESC_SIZE),
samux 1:80ab0d068708 184 2, // bNumInterfaces
samux 1:80ab0d068708 185 1, // bConfigurationValue
samux 1:80ab0d068708 186 0, // iConfiguration
samux 1:80ab0d068708 187 0x80, // bmAttributes
samux 1:80ab0d068708 188 50, // bMaxPower
samux 8:335f2506f422 189
samux 8:335f2506f422 190 // IAD to associate the two CDC interfaces
samux 8:335f2506f422 191 0x08, // bLength
samux 8:335f2506f422 192 0x0b, // bDescriptorType
samux 8:335f2506f422 193 0x00, // bFirstInterface
samux 8:335f2506f422 194 0x02, // bInterfaceCount
samux 8:335f2506f422 195 0x02, // bFunctionClass
samux 8:335f2506f422 196 0x02, // bFunctionSubClass
samux 8:335f2506f422 197 0, // bFunctionProtocol
samux 8:335f2506f422 198 0, // iFunction
samux 1:80ab0d068708 199
samux 1:80ab0d068708 200 // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
samux 1:80ab0d068708 201 9, // bLength
samux 1:80ab0d068708 202 4, // bDescriptorType
samux 1:80ab0d068708 203 0, // bInterfaceNumber
samux 1:80ab0d068708 204 0, // bAlternateSetting
samux 1:80ab0d068708 205 1, // bNumEndpoints
samux 1:80ab0d068708 206 0x02, // bInterfaceClass
samux 1:80ab0d068708 207 0x02, // bInterfaceSubClass
samux 1:80ab0d068708 208 0x01, // bInterfaceProtocol
samux 1:80ab0d068708 209 0, // iInterface
samux 1:80ab0d068708 210
samux 1:80ab0d068708 211 // CDC Header Functional Descriptor, CDC Spec 5.2.3.1, Table 26
samux 1:80ab0d068708 212 5, // bFunctionLength
samux 1:80ab0d068708 213 0x24, // bDescriptorType
samux 1:80ab0d068708 214 0x00, // bDescriptorSubtype
samux 1:80ab0d068708 215 0x10, 0x01, // bcdCDC
samux 1:80ab0d068708 216
samux 1:80ab0d068708 217 // Call Management Functional Descriptor, CDC Spec 5.2.3.2, Table 27
samux 1:80ab0d068708 218 5, // bFunctionLength
samux 1:80ab0d068708 219 0x24, // bDescriptorType
samux 1:80ab0d068708 220 0x01, // bDescriptorSubtype
samux 1:80ab0d068708 221 0x03, // bmCapabilities
samux 1:80ab0d068708 222 1, // bDataInterface
samux 1:80ab0d068708 223
samux 1:80ab0d068708 224 // Abstract Control Management Functional Descriptor, CDC Spec 5.2.3.3, Table 28
samux 1:80ab0d068708 225 4, // bFunctionLength
samux 1:80ab0d068708 226 0x24, // bDescriptorType
samux 1:80ab0d068708 227 0x02, // bDescriptorSubtype
samux 1:80ab0d068708 228 0x06, // bmCapabilities
samux 1:80ab0d068708 229
samux 1:80ab0d068708 230 // Union Functional Descriptor, CDC Spec 5.2.3.8, Table 33
samux 1:80ab0d068708 231 5, // bFunctionLength
samux 1:80ab0d068708 232 0x24, // bDescriptorType
samux 1:80ab0d068708 233 0x06, // bDescriptorSubtype
samux 1:80ab0d068708 234 0, // bMasterInterface
samux 1:80ab0d068708 235 1, // bSlaveInterface0
samux 1:80ab0d068708 236
samux 1:80ab0d068708 237 // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
samux 1:80ab0d068708 238 ENDPOINT_DESCRIPTOR_LENGTH, // bLength
samux 1:80ab0d068708 239 ENDPOINT_DESCRIPTOR, // bDescriptorType
samux 1:80ab0d068708 240 PHY_TO_DESC(EPINT_IN), // bEndpointAddress
samux 1:80ab0d068708 241 E_INTERRUPT, // bmAttributes (0x03=intr)
samux 1:80ab0d068708 242 LSB(MAX_PACKET_SIZE_EPINT), // wMaxPacketSize (LSB)
samux 1:80ab0d068708 243 MSB(MAX_PACKET_SIZE_EPINT), // wMaxPacketSize (MSB)
samux 1:80ab0d068708 244 16, // bInterval
samux 1:80ab0d068708 245
samux 1:80ab0d068708 246
samux 1:80ab0d068708 247
samux 1:80ab0d068708 248
samux 1:80ab0d068708 249 // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
samux 8:335f2506f422 250 9, // bLength
samux 8:335f2506f422 251 4, // bDescriptorType
samux 8:335f2506f422 252 1, // bInterfaceNumber
samux 8:335f2506f422 253 0, // bAlternateSetting
samux 8:335f2506f422 254 2, // bNumEndpoints
samux 8:335f2506f422 255 0x0A, // bInterfaceClass
samux 8:335f2506f422 256 0x00, // bInterfaceSubClass
samux 8:335f2506f422 257 0x00, // bInterfaceProtocol
samux 8:335f2506f422 258 0, // iInterface
samux 1:80ab0d068708 259
samux 1:80ab0d068708 260 // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
samux 8:335f2506f422 261 ENDPOINT_DESCRIPTOR_LENGTH, // bLength
samux 8:335f2506f422 262 ENDPOINT_DESCRIPTOR, // bDescriptorType
samux 8:335f2506f422 263 PHY_TO_DESC(EPBULK_IN), // bEndpointAddress
samux 8:335f2506f422 264 E_BULK, // bmAttributes (0x02=bulk)
samux 8:335f2506f422 265 LSB(MAX_PACKET_SIZE_EPBULK),// wMaxPacketSize (LSB)
samux 8:335f2506f422 266 MSB(MAX_PACKET_SIZE_EPBULK),// wMaxPacketSize (MSB)
samux 8:335f2506f422 267 0, // bInterval
samux 1:80ab0d068708 268
samux 1:80ab0d068708 269 // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
samux 8:335f2506f422 270 ENDPOINT_DESCRIPTOR_LENGTH, // bLength
samux 8:335f2506f422 271 ENDPOINT_DESCRIPTOR, // bDescriptorType
samux 8:335f2506f422 272 PHY_TO_DESC(EPBULK_OUT), // bEndpointAddress
samux 8:335f2506f422 273 E_BULK, // bmAttributes (0x02=bulk)
samux 8:335f2506f422 274 LSB(MAX_PACKET_SIZE_EPBULK),// wMaxPacketSize (LSB)
samux 8:335f2506f422 275 MSB(MAX_PACKET_SIZE_EPBULK),// wMaxPacketSize (MSB)
samux 8:335f2506f422 276 0 // bInterval
samux 1:80ab0d068708 277 };
samux 1:80ab0d068708 278 return configDescriptor;
samux 1:80ab0d068708 279 }