Point Labs / USBDevice

adds a USB serial port to your design

Dependents:   Example_WatchDog_Timer

USBSerial/USBCDC.cpp@6:d0945750af57, 2012-12-20 (annotated)

Committer:
samux
Date:
Thu Dec 20 17:05:37 2012 +0000
Revision:
6:d0945750af57
Parent:
1:80ab0d068708
Child:
8:335f2506f422
USBSerial: detect when a terminal is connected

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
samux 1:80ab0d068708 32 USBCDC::USBCDC(uint16_t vendor_id, uint16_t product_id, uint16_t product_release): USBDevice(vendor_id, product_id, product_release) {
samux 6:d0945750af57 33 terminal_connected = false;
samux 1:80ab0d068708 34 USBDevice::connect();
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;
samux 1:80ab0d068708 55 success = true;
samux 6:d0945750af57 56 terminal_connected = true;
samux 1:80ab0d068708 57 break;
samux 1:80ab0d068708 58 case CDC_SET_CONTROL_LINE_STATE:
samux 6:d0945750af57 59 if (terminal_connected)
samux 6:d0945750af57 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
samux 1:80ab0d068708 71
samux 1:80ab0d068708 72 // Called in ISR context
samux 1:80ab0d068708 73 // Set configuration. Return false if the
samux 1:80ab0d068708 74 // configuration is not supported.
samux 1:80ab0d068708 75 bool USBCDC::USBCallback_setConfiguration(uint8_t configuration) {
samux 1:80ab0d068708 76 if (configuration != DEFAULT_CONFIGURATION) {
samux 1:80ab0d068708 77 return false;
samux 1:80ab0d068708 78 }
samux 1:80ab0d068708 79
samux 1:80ab0d068708 80 // Configure endpoints > 0
samux 1:80ab0d068708 81 addEndpoint(EPINT_IN, MAX_PACKET_SIZE_EPINT);
samux 1:80ab0d068708 82 addEndpoint(EPBULK_IN, MAX_PACKET_SIZE_EPBULK);
samux 1:80ab0d068708 83 addEndpoint(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
samux 1:80ab0d068708 84
samux 1:80ab0d068708 85 // We activate the endpoint to be able to recceive data
samux 1:80ab0d068708 86 readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
samux 1:80ab0d068708 87 return true;
samux 1:80ab0d068708 88 }
samux 1:80ab0d068708 89
samux 1:80ab0d068708 90 bool USBCDC::send(uint8_t * buffer, uint32_t size) {
samux 1:80ab0d068708 91 return USBDevice::write(EPBULK_IN, buffer, size, MAX_CDC_REPORT_SIZE);
samux 1:80ab0d068708 92 }
samux 1:80ab0d068708 93
samux 1:80ab0d068708 94 bool USBCDC::readEP(uint8_t * buffer, uint32_t * size) {
samux 1:80ab0d068708 95 if (!USBDevice::readEP(EPBULK_OUT, buffer, size, MAX_CDC_REPORT_SIZE))
samux 1:80ab0d068708 96 return false;
samux 1:80ab0d068708 97 if (!readStart(EPBULK_OUT, MAX_CDC_REPORT_SIZE))
samux 1:80ab0d068708 98 return false;
samux 1:80ab0d068708 99 return true;
samux 1:80ab0d068708 100 }
samux 1:80ab0d068708 101
samux 1:80ab0d068708 102 bool USBCDC::readEP_NB(uint8_t * buffer, uint32_t * size) {
samux 1:80ab0d068708 103 if (!USBDevice::readEP_NB(EPBULK_OUT, buffer, size, MAX_CDC_REPORT_SIZE))
samux 1:80ab0d068708 104 return false;
samux 1:80ab0d068708 105 if (!readStart(EPBULK_OUT, MAX_CDC_REPORT_SIZE))
samux 1:80ab0d068708 106 return false;
samux 1:80ab0d068708 107 return true;
samux 1:80ab0d068708 108 }
samux 1:80ab0d068708 109
samux 1:80ab0d068708 110
samux 1:80ab0d068708 111 uint8_t * USBCDC::deviceDesc() {
samux 1:80ab0d068708 112 static uint8_t deviceDescriptor[] = {
samux 1:80ab0d068708 113 18, // bLength
samux 1:80ab0d068708 114 1, // bDescriptorType
samux 1:80ab0d068708 115 0x10, 0x01, // bcdUSB
samux 1:80ab0d068708 116 2, // bDeviceClass
samux 1:80ab0d068708 117 0, // bDeviceSubClass
samux 1:80ab0d068708 118 0, // bDeviceProtocol
samux 1:80ab0d068708 119 MAX_PACKET_SIZE_EP0, // bMaxPacketSize0
samux 1:80ab0d068708 120 LSB(VENDOR_ID), MSB(VENDOR_ID), // idVendor
samux 1:80ab0d068708 121 LSB(PRODUCT_ID), MSB(PRODUCT_ID),// idProduct
samux 1:80ab0d068708 122 0x00, 0x01, // bcdDevice
samux 1:80ab0d068708 123 1, // iManufacturer
samux 1:80ab0d068708 124 2, // iProduct
samux 1:80ab0d068708 125 3, // iSerialNumber
samux 1:80ab0d068708 126 1 // bNumConfigurations
samux 1:80ab0d068708 127 };
samux 1:80ab0d068708 128 return deviceDescriptor;
samux 1:80ab0d068708 129 }
samux 1:80ab0d068708 130
samux 1:80ab0d068708 131 uint8_t * USBCDC::stringIinterfaceDesc() {
samux 1:80ab0d068708 132 static uint8_t stringIinterfaceDescriptor[] = {
samux 1:80ab0d068708 133 0x08,
samux 1:80ab0d068708 134 STRING_DESCRIPTOR,
samux 1:80ab0d068708 135 'C',0,'D',0,'C',0,
samux 1:80ab0d068708 136 };
samux 1:80ab0d068708 137 return stringIinterfaceDescriptor;
samux 1:80ab0d068708 138 }
samux 1:80ab0d068708 139
samux 1:80ab0d068708 140 uint8_t * USBCDC::stringIproductDesc() {
samux 1:80ab0d068708 141 static uint8_t stringIproductDescriptor[] = {
samux 1:80ab0d068708 142 0x16,
samux 1:80ab0d068708 143 STRING_DESCRIPTOR,
samux 1:80ab0d068708 144 'C',0,'D',0,'C',0,' ',0,'D',0,'E',0,'V',0,'I',0,'C',0,'E',0
samux 1:80ab0d068708 145 };
samux 1:80ab0d068708 146 return stringIproductDescriptor;
samux 1:80ab0d068708 147 }
samux 1:80ab0d068708 148
samux 1:80ab0d068708 149
samux 1:80ab0d068708 150 #define CONFIG1_DESC_SIZE (9+9+5+5+4+5+7+9+7+7)
samux 1:80ab0d068708 151
samux 1:80ab0d068708 152 uint8_t * USBCDC::configurationDesc() {
samux 1:80ab0d068708 153 static uint8_t configDescriptor[] = {
samux 1:80ab0d068708 154 9, // bLength;
samux 1:80ab0d068708 155 2, // bDescriptorType;
samux 1:80ab0d068708 156 LSB(CONFIG1_DESC_SIZE), // wTotalLength
samux 1:80ab0d068708 157 MSB(CONFIG1_DESC_SIZE),
samux 1:80ab0d068708 158 2, // bNumInterfaces
samux 1:80ab0d068708 159 1, // bConfigurationValue
samux 1:80ab0d068708 160 0, // iConfiguration
samux 1:80ab0d068708 161 0x80, // bmAttributes
samux 1:80ab0d068708 162 50, // bMaxPower
samux 1:80ab0d068708 163
samux 1:80ab0d068708 164 // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
samux 1:80ab0d068708 165 9, // bLength
samux 1:80ab0d068708 166 4, // bDescriptorType
samux 1:80ab0d068708 167 0, // bInterfaceNumber
samux 1:80ab0d068708 168 0, // bAlternateSetting
samux 1:80ab0d068708 169 1, // bNumEndpoints
samux 1:80ab0d068708 170 0x02, // bInterfaceClass
samux 1:80ab0d068708 171 0x02, // bInterfaceSubClass
samux 1:80ab0d068708 172 0x01, // bInterfaceProtocol
samux 1:80ab0d068708 173 0, // iInterface
samux 1:80ab0d068708 174
samux 1:80ab0d068708 175 // CDC Header Functional Descriptor, CDC Spec 5.2.3.1, Table 26
samux 1:80ab0d068708 176 5, // bFunctionLength
samux 1:80ab0d068708 177 0x24, // bDescriptorType
samux 1:80ab0d068708 178 0x00, // bDescriptorSubtype
samux 1:80ab0d068708 179 0x10, 0x01, // bcdCDC
samux 1:80ab0d068708 180
samux 1:80ab0d068708 181 // Call Management Functional Descriptor, CDC Spec 5.2.3.2, Table 27
samux 1:80ab0d068708 182 5, // bFunctionLength
samux 1:80ab0d068708 183 0x24, // bDescriptorType
samux 1:80ab0d068708 184 0x01, // bDescriptorSubtype
samux 1:80ab0d068708 185 0x03, // bmCapabilities
samux 1:80ab0d068708 186 1, // bDataInterface
samux 1:80ab0d068708 187
samux 1:80ab0d068708 188 // Abstract Control Management Functional Descriptor, CDC Spec 5.2.3.3, Table 28
samux 1:80ab0d068708 189 4, // bFunctionLength
samux 1:80ab0d068708 190 0x24, // bDescriptorType
samux 1:80ab0d068708 191 0x02, // bDescriptorSubtype
samux 1:80ab0d068708 192 0x06, // bmCapabilities
samux 1:80ab0d068708 193
samux 1:80ab0d068708 194 // Union Functional Descriptor, CDC Spec 5.2.3.8, Table 33
samux 1:80ab0d068708 195 5, // bFunctionLength
samux 1:80ab0d068708 196 0x24, // bDescriptorType
samux 1:80ab0d068708 197 0x06, // bDescriptorSubtype
samux 1:80ab0d068708 198 0, // bMasterInterface
samux 1:80ab0d068708 199 1, // bSlaveInterface0
samux 1:80ab0d068708 200
samux 1:80ab0d068708 201 // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
samux 1:80ab0d068708 202 ENDPOINT_DESCRIPTOR_LENGTH, // bLength
samux 1:80ab0d068708 203 ENDPOINT_DESCRIPTOR, // bDescriptorType
samux 1:80ab0d068708 204 PHY_TO_DESC(EPINT_IN), // bEndpointAddress
samux 1:80ab0d068708 205 E_INTERRUPT, // bmAttributes (0x03=intr)
samux 1:80ab0d068708 206 LSB(MAX_PACKET_SIZE_EPINT), // wMaxPacketSize (LSB)
samux 1:80ab0d068708 207 MSB(MAX_PACKET_SIZE_EPINT), // wMaxPacketSize (MSB)
samux 1:80ab0d068708 208 16, // bInterval
samux 1:80ab0d068708 209
samux 1:80ab0d068708 210
samux 1:80ab0d068708 211
samux 1:80ab0d068708 212
samux 1:80ab0d068708 213 // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
samux 1:80ab0d068708 214 9, // bLength
samux 1:80ab0d068708 215 4, // bDescriptorType
samux 1:80ab0d068708 216 1, // bInterfaceNumber
samux 1:80ab0d068708 217 0, // bAlternateSetting
samux 1:80ab0d068708 218 2, // bNumEndpoints
samux 1:80ab0d068708 219 0x0A, // bInterfaceClass
samux 1:80ab0d068708 220 0x00, // bInterfaceSubClass
samux 1:80ab0d068708 221 0x00, // bInterfaceProtocol
samux 1:80ab0d068708 222 0, // iInterface
samux 1:80ab0d068708 223
samux 1:80ab0d068708 224 // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
samux 1:80ab0d068708 225 7, // bLength
samux 1:80ab0d068708 226 5, // bDescriptorType
samux 1:80ab0d068708 227 PHY_TO_DESC(EPBULK_IN), // bEndpointAddress
samux 1:80ab0d068708 228 0x02, // bmAttributes (0x02=bulk)
samux 1:80ab0d068708 229 LSB(MAX_PACKET_SIZE_EPBULK), // wMaxPacketSize (LSB)
samux 1:80ab0d068708 230 MSB(MAX_PACKET_SIZE_EPBULK), // wMaxPacketSize (MSB)
samux 1:80ab0d068708 231 0, // bInterval
samux 1:80ab0d068708 232
samux 1:80ab0d068708 233 // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
samux 1:80ab0d068708 234 7, // bLength
samux 1:80ab0d068708 235 5, // bDescriptorType
samux 1:80ab0d068708 236 PHY_TO_DESC(EPBULK_OUT),// bEndpointAddress
samux 1:80ab0d068708 237 0x02, // bmAttributes (0x02=bulk)
samux 1:80ab0d068708 238 LSB(MAX_PACKET_SIZE_EPBULK), // wMaxPacketSize (LSB)
samux 1:80ab0d068708 239 MSB(MAX_PACKET_SIZE_EPBULK), // wMaxPacketSize (MSB)
samux 1:80ab0d068708 240 0 // bInterval
samux 1:80ab0d068708 241 };
samux 1:80ab0d068708 242 return configDescriptor;
samux 1:80ab0d068708 243 }