UvA NetCentric Computing listener
Dependencies: AndroidAccessory mbed
NetCentricApp.cpp@0:0f9ceecf1db8, 2014-05-22 (annotated)
- Committer:
- diepvriezer
- Date:
- Thu May 22 08:33:12 2014 +0000
- Revision:
- 0:0f9ceecf1db8
Initial commit
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
diepvriezer | 0:0f9ceecf1db8 | 1 | #include "NetCentricApp.h" |
diepvriezer | 0:0f9ceecf1db8 | 2 | #include "MbedCommand.h" |
diepvriezer | 0:0f9ceecf1db8 | 3 | |
diepvriezer | 0:0f9ceecf1db8 | 4 | // Process commands here. |
diepvriezer | 0:0f9ceecf1db8 | 5 | MbedResponse *NetCentricApp::getResponse(MbedRequest *request) { |
diepvriezer | 0:0f9ceecf1db8 | 6 | if (request->commandId == COMMAND_SUM) { |
diepvriezer | 0:0f9ceecf1db8 | 7 | return sumCommand(request); |
diepvriezer | 0:0f9ceecf1db8 | 8 | } else if (request->commandId == COMMAND_AVG) { |
diepvriezer | 0:0f9ceecf1db8 | 9 | return avgCommand(request); |
diepvriezer | 0:0f9ceecf1db8 | 10 | } else if (request->commandId == COMMAND_LED) { |
diepvriezer | 0:0f9ceecf1db8 | 11 | return ledCommand(request); |
diepvriezer | 0:0f9ceecf1db8 | 12 | } |
diepvriezer | 0:0f9ceecf1db8 | 13 | |
diepvriezer | 0:0f9ceecf1db8 | 14 | MbedResponse *commandNotFound = new MbedResponse(); |
diepvriezer | 0:0f9ceecf1db8 | 15 | commandNotFound->requestId = request->id; |
diepvriezer | 0:0f9ceecf1db8 | 16 | commandNotFound->commandId = request->commandId; |
diepvriezer | 0:0f9ceecf1db8 | 17 | commandNotFound->error = ERR_COMMAND_NOT_FOUND; |
diepvriezer | 0:0f9ceecf1db8 | 18 | commandNotFound->n = 0; |
diepvriezer | 0:0f9ceecf1db8 | 19 | commandNotFound->values = NULL; |
diepvriezer | 0:0f9ceecf1db8 | 20 | |
diepvriezer | 0:0f9ceecf1db8 | 21 | return commandNotFound; |
diepvriezer | 0:0f9ceecf1db8 | 22 | } |
diepvriezer | 0:0f9ceecf1db8 | 23 | |
diepvriezer | 0:0f9ceecf1db8 | 24 | // Sample commands. |
diepvriezer | 0:0f9ceecf1db8 | 25 | MbedResponse *NetCentricApp::sumCommand(MbedRequest *request) { |
diepvriezer | 0:0f9ceecf1db8 | 26 | float sum = 0.0f; |
diepvriezer | 0:0f9ceecf1db8 | 27 | for (int i = 0; i < request->n; i++) { |
diepvriezer | 0:0f9ceecf1db8 | 28 | sum += request->args[i]; |
diepvriezer | 0:0f9ceecf1db8 | 29 | } |
diepvriezer | 0:0f9ceecf1db8 | 30 | |
diepvriezer | 0:0f9ceecf1db8 | 31 | MbedResponse *r = new MbedResponse(); |
diepvriezer | 0:0f9ceecf1db8 | 32 | r->requestId = request->id; |
diepvriezer | 0:0f9ceecf1db8 | 33 | r->commandId = request->commandId; |
diepvriezer | 0:0f9ceecf1db8 | 34 | r->error = NO_ERROR; |
diepvriezer | 0:0f9ceecf1db8 | 35 | r->n = 1; |
diepvriezer | 0:0f9ceecf1db8 | 36 | r->values = new float[1]; |
diepvriezer | 0:0f9ceecf1db8 | 37 | r->values[0] = sum; |
diepvriezer | 0:0f9ceecf1db8 | 38 | return r; |
diepvriezer | 0:0f9ceecf1db8 | 39 | } |
diepvriezer | 0:0f9ceecf1db8 | 40 | |
diepvriezer | 0:0f9ceecf1db8 | 41 | MbedResponse *NetCentricApp::avgCommand(MbedRequest *request) { |
diepvriezer | 0:0f9ceecf1db8 | 42 | float sum = 0.0f; |
diepvriezer | 0:0f9ceecf1db8 | 43 | for (int i = 0; i < request->n; i++) { |
diepvriezer | 0:0f9ceecf1db8 | 44 | sum += request->args[i]; |
diepvriezer | 0:0f9ceecf1db8 | 45 | } |
diepvriezer | 0:0f9ceecf1db8 | 46 | |
diepvriezer | 0:0f9ceecf1db8 | 47 | MbedResponse *r = new MbedResponse(); |
diepvriezer | 0:0f9ceecf1db8 | 48 | r->requestId = request->id; |
diepvriezer | 0:0f9ceecf1db8 | 49 | r->commandId = request->commandId; |
diepvriezer | 0:0f9ceecf1db8 | 50 | r->error = NO_ERROR; |
diepvriezer | 0:0f9ceecf1db8 | 51 | r->n = 1; |
diepvriezer | 0:0f9ceecf1db8 | 52 | r->values = new float[1]; |
diepvriezer | 0:0f9ceecf1db8 | 53 | |
diepvriezer | 0:0f9ceecf1db8 | 54 | if (request->n > 0) { |
diepvriezer | 0:0f9ceecf1db8 | 55 | r->values[0] = sum / request->n; |
diepvriezer | 0:0f9ceecf1db8 | 56 | } else { |
diepvriezer | 0:0f9ceecf1db8 | 57 | r->values[0] = sum; |
diepvriezer | 0:0f9ceecf1db8 | 58 | } |
diepvriezer | 0:0f9ceecf1db8 | 59 | return r; |
diepvriezer | 0:0f9ceecf1db8 | 60 | } |
diepvriezer | 0:0f9ceecf1db8 | 61 | |
diepvriezer | 0:0f9ceecf1db8 | 62 | // Control the LED's. |
diepvriezer | 0:0f9ceecf1db8 | 63 | MbedResponse *NetCentricApp::ledCommand(MbedRequest *request) { |
diepvriezer | 0:0f9ceecf1db8 | 64 | DigitalOut led1(LED1); |
diepvriezer | 0:0f9ceecf1db8 | 65 | DigitalOut led2(LED2); |
diepvriezer | 0:0f9ceecf1db8 | 66 | DigitalOut led3(LED3); |
diepvriezer | 0:0f9ceecf1db8 | 67 | DigitalOut led4(LED4); |
diepvriezer | 0:0f9ceecf1db8 | 68 | |
diepvriezer | 0:0f9ceecf1db8 | 69 | if (request->n > 0) led1 = request->args[0]; |
diepvriezer | 0:0f9ceecf1db8 | 70 | if (request->n > 1) led2 = request->args[1]; |
diepvriezer | 0:0f9ceecf1db8 | 71 | if (request->n > 2) led3 = request->args[2]; |
diepvriezer | 0:0f9ceecf1db8 | 72 | if (request->n > 3) led4 = request->args[3]; |
diepvriezer | 0:0f9ceecf1db8 | 73 | |
diepvriezer | 0:0f9ceecf1db8 | 74 | MbedResponse *r = new MbedResponse(); |
diepvriezer | 0:0f9ceecf1db8 | 75 | r->requestId = request->id; |
diepvriezer | 0:0f9ceecf1db8 | 76 | r->commandId = request->commandId; |
diepvriezer | 0:0f9ceecf1db8 | 77 | r->error = NO_ERROR; |
diepvriezer | 0:0f9ceecf1db8 | 78 | r->n = 4; |
diepvriezer | 0:0f9ceecf1db8 | 79 | r->values = new float[4]; |
diepvriezer | 0:0f9ceecf1db8 | 80 | r->values[0] = led1; |
diepvriezer | 0:0f9ceecf1db8 | 81 | r->values[1] = led2; |
diepvriezer | 0:0f9ceecf1db8 | 82 | r->values[2] = led3; |
diepvriezer | 0:0f9ceecf1db8 | 83 | r->values[3] = led4; |
diepvriezer | 0:0f9ceecf1db8 | 84 | |
diepvriezer | 0:0f9ceecf1db8 | 85 | return r; |
diepvriezer | 0:0f9ceecf1db8 | 86 | } |
diepvriezer | 0:0f9ceecf1db8 | 87 | |
diepvriezer | 0:0f9ceecf1db8 | 88 | // Setup once a device is connected. |
diepvriezer | 0:0f9ceecf1db8 | 89 | void NetCentricApp::setupDevice() { |
diepvriezer | 0:0f9ceecf1db8 | 90 | printf("Connected to Android!\r\n"); |
diepvriezer | 0:0f9ceecf1db8 | 91 | } |
diepvriezer | 0:0f9ceecf1db8 | 92 | |
diepvriezer | 0:0f9ceecf1db8 | 93 | // Called on disconnect. |
diepvriezer | 0:0f9ceecf1db8 | 94 | void NetCentricApp::resetDevice() { |
diepvriezer | 0:0f9ceecf1db8 | 95 | printf("Disconnected\r\n"); |
diepvriezer | 0:0f9ceecf1db8 | 96 | } |
diepvriezer | 0:0f9ceecf1db8 | 97 | |
diepvriezer | 0:0f9ceecf1db8 | 98 | |
diepvriezer | 0:0f9ceecf1db8 | 99 | // Construction of requests. |
diepvriezer | 0:0f9ceecf1db8 | 100 | int NetCentricApp::callbackRead(u8 *buffer, int len) { |
diepvriezer | 0:0f9ceecf1db8 | 101 | if (len > 0) { |
diepvriezer | 0:0f9ceecf1db8 | 102 | // Parse request, format: |
diepvriezer | 0:0f9ceecf1db8 | 103 | // int - request ID |
diepvriezer | 0:0f9ceecf1db8 | 104 | // int - command ID |
diepvriezer | 0:0f9ceecf1db8 | 105 | // ubyte - # args |
diepvriezer | 0:0f9ceecf1db8 | 106 | // float[] -- args |
diepvriezer | 0:0f9ceecf1db8 | 107 | |
diepvriezer | 0:0f9ceecf1db8 | 108 | // Note len is fixed as the packet is always equally big. Don't try to use |
diepvriezer | 0:0f9ceecf1db8 | 109 | // packets of variable size, the smallest size of a encountered packet is |
diepvriezer | 0:0f9ceecf1db8 | 110 | // used. |
diepvriezer | 0:0f9ceecf1db8 | 111 | |
diepvriezer | 0:0f9ceecf1db8 | 112 | MbedRequest *request = new MbedRequest(); |
diepvriezer | 0:0f9ceecf1db8 | 113 | |
diepvriezer | 0:0f9ceecf1db8 | 114 | request->id = getInt(buffer, 0, len); |
diepvriezer | 0:0f9ceecf1db8 | 115 | request->commandId = getInt(buffer, 4, len); |
diepvriezer | 0:0f9ceecf1db8 | 116 | request->n = getInt(buffer, 8, len); |
diepvriezer | 0:0f9ceecf1db8 | 117 | request->args = NULL; |
diepvriezer | 0:0f9ceecf1db8 | 118 | |
diepvriezer | 0:0f9ceecf1db8 | 119 | printf("request: %i, command: %i, n-args: %i\r\n", request->id, request->commandId, request->n); |
diepvriezer | 0:0f9ceecf1db8 | 120 | |
diepvriezer | 0:0f9ceecf1db8 | 121 | int n = request->n; |
diepvriezer | 0:0f9ceecf1db8 | 122 | if (n > 0) { |
diepvriezer | 0:0f9ceecf1db8 | 123 | request->args = new float[n]; |
diepvriezer | 0:0f9ceecf1db8 | 124 | for (int i = 0; i < n; i++) { |
diepvriezer | 0:0f9ceecf1db8 | 125 | int offset = 12 + (i * 4); |
diepvriezer | 0:0f9ceecf1db8 | 126 | float f = getFloat(buffer, offset, len); |
diepvriezer | 0:0f9ceecf1db8 | 127 | request->args[i] = f; |
diepvriezer | 0:0f9ceecf1db8 | 128 | } |
diepvriezer | 0:0f9ceecf1db8 | 129 | } |
diepvriezer | 0:0f9ceecf1db8 | 130 | |
diepvriezer | 0:0f9ceecf1db8 | 131 | // Construct and send response. |
diepvriezer | 0:0f9ceecf1db8 | 132 | MbedResponse *response = getResponse(request); |
diepvriezer | 0:0f9ceecf1db8 | 133 | int responseSize = 4 + 4 + 4 + 4 + (response->n*4); |
diepvriezer | 0:0f9ceecf1db8 | 134 | u8 responseBuffer[responseSize]; |
diepvriezer | 0:0f9ceecf1db8 | 135 | |
diepvriezer | 0:0f9ceecf1db8 | 136 | memcpy(responseBuffer + 0, reinterpret_cast<u8 const *>(&response->requestId), 4); |
diepvriezer | 0:0f9ceecf1db8 | 137 | memcpy(responseBuffer + 4, reinterpret_cast<u8 const *>(&response->commandId), 4); |
diepvriezer | 0:0f9ceecf1db8 | 138 | memcpy(responseBuffer + 8, reinterpret_cast<u8 const *>(&response->error), 4); |
diepvriezer | 0:0f9ceecf1db8 | 139 | memcpy(responseBuffer + 12, reinterpret_cast<u8 const *>(&response->n), 4); |
diepvriezer | 0:0f9ceecf1db8 | 140 | if (response->n > 0) { |
diepvriezer | 0:0f9ceecf1db8 | 141 | for (int i = 0; i < response->n; i++) { |
diepvriezer | 0:0f9ceecf1db8 | 142 | float f = response->values[i]; |
diepvriezer | 0:0f9ceecf1db8 | 143 | memcpy(responseBuffer + 16 + i*4, reinterpret_cast<u8 const *>(&f), 4); |
diepvriezer | 0:0f9ceecf1db8 | 144 | } |
diepvriezer | 0:0f9ceecf1db8 | 145 | |
diepvriezer | 0:0f9ceecf1db8 | 146 | } |
diepvriezer | 0:0f9ceecf1db8 | 147 | |
diepvriezer | 0:0f9ceecf1db8 | 148 | write(responseBuffer, responseSize); |
diepvriezer | 0:0f9ceecf1db8 | 149 | |
diepvriezer | 0:0f9ceecf1db8 | 150 | // Clean up. |
diepvriezer | 0:0f9ceecf1db8 | 151 | if (request->n > 0) { |
diepvriezer | 0:0f9ceecf1db8 | 152 | delete[] request->args; |
diepvriezer | 0:0f9ceecf1db8 | 153 | } |
diepvriezer | 0:0f9ceecf1db8 | 154 | delete request; |
diepvriezer | 0:0f9ceecf1db8 | 155 | |
diepvriezer | 0:0f9ceecf1db8 | 156 | if (response->n > 0) { |
diepvriezer | 0:0f9ceecf1db8 | 157 | delete[] response->values; |
diepvriezer | 0:0f9ceecf1db8 | 158 | } |
diepvriezer | 0:0f9ceecf1db8 | 159 | delete response; |
diepvriezer | 0:0f9ceecf1db8 | 160 | } |
diepvriezer | 0:0f9ceecf1db8 | 161 | |
diepvriezer | 0:0f9ceecf1db8 | 162 | return 0; |
diepvriezer | 0:0f9ceecf1db8 | 163 | } |
diepvriezer | 0:0f9ceecf1db8 | 164 | |
diepvriezer | 0:0f9ceecf1db8 | 165 | // Called to confirm a write operation. |
diepvriezer | 0:0f9ceecf1db8 | 166 | int NetCentricApp::callbackWrite() { |
diepvriezer | 0:0f9ceecf1db8 | 167 | return 0; |
diepvriezer | 0:0f9ceecf1db8 | 168 | } |
diepvriezer | 0:0f9ceecf1db8 | 169 | |
diepvriezer | 0:0f9ceecf1db8 | 170 | |
diepvriezer | 0:0f9ceecf1db8 | 171 | /* Unsigned byte to primitives. Little endian assumed, Java sends Big endian by default. */ |
diepvriezer | 0:0f9ceecf1db8 | 172 | float NetCentricApp::getFloat(u8 *buffer, int offset, int bufferLen) { |
diepvriezer | 0:0f9ceecf1db8 | 173 | if (offset + 3 > bufferLen) { |
diepvriezer | 0:0f9ceecf1db8 | 174 | printf("float index out of bounds!\r\n"); |
diepvriezer | 0:0f9ceecf1db8 | 175 | return 0.0; |
diepvriezer | 0:0f9ceecf1db8 | 176 | } |
diepvriezer | 0:0f9ceecf1db8 | 177 | |
diepvriezer | 0:0f9ceecf1db8 | 178 | float f; |
diepvriezer | 0:0f9ceecf1db8 | 179 | memcpy(&f, buffer + offset, sizeof(f)); |
diepvriezer | 0:0f9ceecf1db8 | 180 | return f; |
diepvriezer | 0:0f9ceecf1db8 | 181 | } |
diepvriezer | 0:0f9ceecf1db8 | 182 | |
diepvriezer | 0:0f9ceecf1db8 | 183 | int NetCentricApp::getInt(u8 *buffer, int offset, int bufferLen) { |
diepvriezer | 0:0f9ceecf1db8 | 184 | if (offset + 3 > bufferLen) { |
diepvriezer | 0:0f9ceecf1db8 | 185 | printf("int index out of bounds!\r\n"); |
diepvriezer | 0:0f9ceecf1db8 | 186 | return 0; |
diepvriezer | 0:0f9ceecf1db8 | 187 | } |
diepvriezer | 0:0f9ceecf1db8 | 188 | |
diepvriezer | 0:0f9ceecf1db8 | 189 | int i; |
diepvriezer | 0:0f9ceecf1db8 | 190 | memcpy(&i, buffer + offset, sizeof(i)); |
diepvriezer | 0:0f9ceecf1db8 | 191 | return i; |
diepvriezer | 0:0f9ceecf1db8 | 192 | } |
diepvriezer | 0:0f9ceecf1db8 | 193 | |
diepvriezer | 0:0f9ceecf1db8 | 194 | u8 NetCentricApp::getUByte(u8 *buffer, int offset, int bufferLen) { |
diepvriezer | 0:0f9ceecf1db8 | 195 | if (offset > bufferLen) { |
diepvriezer | 0:0f9ceecf1db8 | 196 | printf("byte index out of bounds!\r\n"); |
diepvriezer | 0:0f9ceecf1db8 | 197 | return 0; |
diepvriezer | 0:0f9ceecf1db8 | 198 | } |
diepvriezer | 0:0f9ceecf1db8 | 199 | |
diepvriezer | 0:0f9ceecf1db8 | 200 | u8 b; |
diepvriezer | 0:0f9ceecf1db8 | 201 | memcpy(&b, buffer + offset, sizeof(b)); |
diepvriezer | 0:0f9ceecf1db8 | 202 | return b; |
diepvriezer | 0:0f9ceecf1db8 | 203 | } |