Chris Styles / m0-USBMouse

USB Mouse (relative) example for mbed NXP LPC11U24 beta

USB_HID_STACK/USBHID.c@1:e089be2a6aa1, 2011-11-09 (annotated)

Committer:
chris
Date:
Wed Nov 09 15:55:10 2011 +0000
Revision:
1:e089be2a6aa1
Parent:
0:163560051396 
removed include for <math.h> that is already included by mbed.h

Who changed what in which revision?

UserRevisionLine numberNew contents of line
chris 0:163560051396 1 /* USBClass_HID.c */
chris 0:163560051396 2 /* Human Interface Device (HID) class */
chris 0:163560051396 3 /* Copyright (c) 2011 ARM Limited. All rights reserved. */
chris 0:163560051396 4
chris 0:163560051396 5 #include "stdint.h"
chris 0:163560051396 6
chris 0:163560051396 7 #include "USBEndpoints.h"
chris 0:163560051396 8 #include "USBDevice_Types.h"
chris 0:163560051396 9 #include "USBBusInterface.h"
chris 0:163560051396 10 #include "USBHID.h"
chris 0:163560051396 11
chris 0:163560051396 12 static USBHID * instHID;
chris 0:163560051396 13
chris 0:163560051396 14 /* Output report from SET_REPORT request */
chris 0:163560051396 15 static HID_REPORT outputReport;
chris 0:163560051396 16
chris 0:163560051396 17 void setInstanceHID(USBHID * _inst){ instHID = _inst;};
chris 0:163560051396 18
chris 0:163560051396 19 bool USBClass_HID_request(void)
chris 0:163560051396 20 {
chris 0:163560051396 21 /* Called in ISR context */
chris 0:163560051396 22
chris 0:163560051396 23 bool success = false;
chris 0:163560051396 24 CONTROL_TRANSFER *transfer = USBDevice_getTransferPtr();
chris 0:163560051396 25 uint8_t *hidDescriptor;
chris 0:163560051396 26
chris 0:163560051396 27 /* Process additional standard requests */
chris 0:163560051396 28
chris 0:163560051396 29 if ((transfer->setup.bmRequestType.Type == STANDARD_TYPE))
chris 0:163560051396 30 {
chris 0:163560051396 31 switch (transfer->setup.bRequest)
chris 0:163560051396 32 {
chris 0:163560051396 33 case GET_DESCRIPTOR:
chris 0:163560051396 34 switch (DESCRIPTOR_TYPE(transfer->setup.wValue))
chris 0:163560051396 35 {
chris 0:163560051396 36 case REPORT_DESCRIPTOR:
chris 0:163560051396 37 printf("get report descr\r\n");
chris 0:163560051396 38 if ((instHID->ReportDesc() != NULL) \
chris 0:163560051396 39 && (instHID->ReportDescLength() != 0))
chris 0:163560051396 40 {
chris 0:163560051396 41 transfer->remaining = instHID->ReportDescLength();
chris 0:163560051396 42 transfer->ptr = instHID->ReportDesc();
chris 0:163560051396 43 transfer->direction = DEVICE_TO_HOST;
chris 0:163560051396 44 success = true;
chris 0:163560051396 45 }
chris 0:163560051396 46 break;
chris 0:163560051396 47 case HID_DESCRIPTOR:
chris 0:163560051396 48 /* Find the HID descriptor, after the configuration descriptor */
chris 0:163560051396 49 hidDescriptor = USBDevice_findDescriptor(HID_DESCRIPTOR);
chris 0:163560051396 50 if (hidDescriptor != NULL) /* NULL = Not found */
chris 0:163560051396 51 {
chris 0:163560051396 52 transfer->remaining = HID_DESCRIPTOR_LENGTH;
chris 0:163560051396 53 transfer->ptr = hidDescriptor;
chris 0:163560051396 54 transfer->direction = DEVICE_TO_HOST;
chris 0:163560051396 55 success = true;
chris 0:163560051396 56 }
chris 0:163560051396 57 break;
chris 0:163560051396 58
chris 0:163560051396 59 default:
chris 0:163560051396 60 break;
chris 0:163560051396 61 }
chris 0:163560051396 62 break;
chris 0:163560051396 63 default:
chris 0:163560051396 64 break;
chris 0:163560051396 65 }
chris 0:163560051396 66 }
chris 0:163560051396 67
chris 0:163560051396 68 /* Process class-specific requests */
chris 0:163560051396 69
chris 0:163560051396 70 if (transfer->setup.bmRequestType.Type == CLASS_TYPE)
chris 0:163560051396 71 {
chris 0:163560051396 72 switch (transfer->setup.bRequest)
chris 0:163560051396 73 {
chris 0:163560051396 74 case SET_REPORT:
chris 0:163560051396 75 /* First byte will be used for report ID */
chris 0:163560051396 76 outputReport.data[0] = transfer->setup.wValue & 0xff;
chris 0:163560051396 77 outputReport.length = transfer->setup.wLength + 1;
chris 0:163560051396 78
chris 0:163560051396 79 transfer->remaining = sizeof(outputReport.data) - 1;
chris 0:163560051396 80 transfer->ptr = &outputReport.data[1];
chris 0:163560051396 81 transfer->direction = HOST_TO_DEVICE;
chris 0:163560051396 82 transfer->notify = true; /* Callback on completion */
chris 0:163560051396 83 success = true;
chris 0:163560051396 84 default:
chris 0:163560051396 85 break;
chris 0:163560051396 86 }
chris 0:163560051396 87 }
chris 0:163560051396 88
chris 0:163560051396 89 return success;
chris 0:163560051396 90 }
chris 0:163560051396 91
chris 0:163560051396 92 void USBClass_HID_requestCompleted(void)
chris 0:163560051396 93 {
chris 0:163560051396 94 /* SET_REPORT request - data is now valid */
chris 0:163560051396 95
chris 0:163560051396 96 instHID->HID_callbackSetReport(&outputReport);
chris 0:163560051396 97 }
chris 0:163560051396 98
chris 0:163560051396 99 bool USBClass_HID_sendInputReport(uint8_t endpoint, HID_REPORT *report)
chris 0:163560051396 100 {
chris 0:163560051396 101 EP_STATUS result;
chris 0:163560051396 102
chris 0:163560051396 103 if (report->length > MAX_HID_REPORT_SIZE)
chris 0:163560051396 104 {
chris 0:163560051396 105 return false;
chris 0:163560051396 106 }
chris 0:163560051396 107
chris 0:163560051396 108 /* Block if not configured */
chris 0:163560051396 109 while (!USBDevice_isConfigured());
chris 0:163560051396 110
chris 0:163560051396 111 /* Send report */
chris 0:163560051396 112 result = USBBusInterface_endpointWrite(endpoint, report->data, report->length);
chris 0:163560051396 113
chris 0:163560051396 114 if (result != EP_PENDING)
chris 0:163560051396 115 {
chris 0:163560051396 116 return false;
chris 0:163560051396 117 }
chris 0:163560051396 118
chris 0:163560051396 119 /* Wait for completion */
chris 0:163560051396 120 do {
chris 0:163560051396 121 result = USBBusInterface_endpointWriteResult(endpoint);
chris 0:163560051396 122 } while ((result == EP_PENDING) && USBDevice_isConfigured());
chris 0:163560051396 123
chris 0:163560051396 124 return (result == EP_COMPLETED);
chris 0:163560051396 125 }
chris 0:163560051396 126
chris 0:163560051396 127 #if 0
chris 0:163560051396 128 bool USBClass_HID_getOutputReport(uint8_t endpoint, HID_REPORT *report)
chris 0:163560051396 129 {
chris 0:163560051396 130 EP_RESULT result;
chris 0:163560051396 131 uint32_t bytesRead = 0;
chris 0:163560051396 132
chris 0:163560051396 133 /* Block if not configured */
chris 0:163560051396 134 while (!USBDevice_isConfigured());
chris 0:163560051396 135
chris 0:163560051396 136 /* Read report */
chris 0:163560051396 137 result = USBBusInterface_endpointRead(endpoint, report->data, MAX_HID_REPORT_SIZE);
chris 0:163560051396 138
chris 0:163560051396 139 if (result != EP_PENDING)
chris 0:163560051396 140 {
chris 0:163560051396 141 return false;
chris 0:163560051396 142 }
chris 0:163560051396 143
chris 0:163560051396 144 /* Wait for completion */
chris 0:163560051396 145 do {
chris 0:163560051396 146 result = USBBusInterface_endpointReadResult(endpoint, &bytesRead);
chris 0:163560051396 147 } while ((result == EP_PENDING) && USBDevice_isConfigured());
chris 0:163560051396 148
chris 0:163560051396 149 report->length = bytesRead;
chris 0:163560051396 150
chris 0:163560051396 151 return (result == EP_SUCCESS);
chris 0:163560051396 152 }
chris 0:163560051396 153 #endif
chris 0:163560051396 154
chris 0:163560051396 155
chris 0:163560051396 156 #define DEFAULT_CONFIGURATION (1)
chris 0:163560051396 157
chris 0:163560051396 158 USBHID::USBHID(){
chris 0:163560051396 159 setInstanceHID(this);
chris 0:163560051396 160 USBDevice_init();
chris 0:163560051396 161 USBDevice_connect();
chris 0:163560051396 162 }
chris 0:163560051396 163
chris 0:163560051396 164 uint16_t USBHID::ReportDescLength() {
chris 0:163560051396 165 ReportDesc();
chris 0:163560051396 166 return reportLength;
chris 0:163560051396 167 }
chris 0:163560051396 168
chris 0:163560051396 169 /*
chris 0:163560051396 170 * Route callbacks from lower layers to class(es)
chris 0:163560051396 171 */
chris 0:163560051396 172
chris 0:163560051396 173 void USBHID::USBCallback_busReset(void) {
chris 0:163560051396 174 /* Called in ISR context */
chris 0:163560051396 175 /* Called by USBDevice layer on bus reset */
chris 0:163560051396 176
chris 0:163560051396 177 /* May be used to reset state */
chris 0:163560051396 178 }
chris 0:163560051396 179
chris 0:163560051396 180 bool USBHID::USBCallback_request() {
chris 0:163560051396 181 /* Called in ISR context */
chris 0:163560051396 182 /* Called by USBDevice on Endpoint0 request */
chris 0:163560051396 183
chris 0:163560051396 184 /* This is used to handle extensions to standard requests */
chris 0:163560051396 185 /* and class specific requests. */
chris 0:163560051396 186
chris 0:163560051396 187 /* Return true if class handles this request */
chris 0:163560051396 188 return USBClass_HID_request();
chris 0:163560051396 189 }
chris 0:163560051396 190
chris 0:163560051396 191 void USBHID::USBCallback_requestCompleted() {
chris 0:163560051396 192 /* Called in ISR context */
chris 0:163560051396 193 /* Called by USBDevice on Endpoint0 request completion */
chris 0:163560051396 194 /* if the 'notify' flag has been set to true */
chris 0:163560051396 195
chris 0:163560051396 196 /* In this case it is used to indicate that a HID report has */
chris 0:163560051396 197 /* been received from the host on endpoint 0 */
chris 0:163560051396 198
chris 0:163560051396 199 USBClass_HID_requestCompleted();
chris 0:163560051396 200 }
chris 0:163560051396 201
chris 0:163560051396 202 void USBHID::HID_callbackSetReport(HID_REPORT *report) {
chris 0:163560051396 203 /* Called in ISR context */
chris 0:163560051396 204
chris 0:163560051396 205 /* HID Report received by SET_REPORT request */
chris 0:163560051396 206 /* First byte of data will be the report ID */
chris 0:163560051396 207 }
chris 0:163560051396 208
chris 0:163560051396 209 bool USBHID::USBCallback_setConfiguration(uint8_t configuration) {
chris 0:163560051396 210 /* Called in ISR context */
chris 0:163560051396 211
chris 0:163560051396 212 /* Set configuration. Return false if the */
chris 0:163560051396 213 /* configuration is not supported. */
chris 0:163560051396 214 if (configuration != DEFAULT_CONFIGURATION) {
chris 0:163560051396 215 return false;
chris 0:163560051396 216 }
chris 0:163560051396 217
chris 0:163560051396 218 /* Configure endpoints > 0 */
chris 0:163560051396 219 USBDevice_addEndpoint(EPINT_IN, MAX_PACKET_SIZE_EPINT);
chris 0:163560051396 220 return true;
chris 0:163560051396 221 }
chris 0:163560051396 222