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AX12.cpp@1:40bc0469fd51, 2015-04-11 (annotated)
- Committer:
- sype
- Date:
- Sat Apr 11 16:07:29 2015 +0000
- Revision:
- 1:40bc0469fd51
- Parent:
- 0:db8f063d50f0
okay
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
akichika | 0:db8f063d50f0 | 1 | /* mbed AX-12+ Servo Library |
akichika | 0:db8f063d50f0 | 2 | * |
akichika | 0:db8f063d50f0 | 3 | * Copyright (c) 2010, cstyles (http://mbed.org) |
akichika | 0:db8f063d50f0 | 4 | * |
akichika | 0:db8f063d50f0 | 5 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
akichika | 0:db8f063d50f0 | 6 | * of this software and associated documentation files (the "Software"), to deal |
akichika | 0:db8f063d50f0 | 7 | * in the Software without restriction, including without limitation the rights |
akichika | 0:db8f063d50f0 | 8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
akichika | 0:db8f063d50f0 | 9 | * copies of the Software, and to permit persons to whom the Software is |
akichika | 0:db8f063d50f0 | 10 | * furnished to do so, subject to the following conditions: |
akichika | 0:db8f063d50f0 | 11 | * |
akichika | 0:db8f063d50f0 | 12 | * The above copyright notice and this permission notice shall be included in |
akichika | 0:db8f063d50f0 | 13 | * all copies or substantial portions of the Software. |
akichika | 0:db8f063d50f0 | 14 | * |
akichika | 0:db8f063d50f0 | 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
akichika | 0:db8f063d50f0 | 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
akichika | 0:db8f063d50f0 | 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
akichika | 0:db8f063d50f0 | 18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
akichika | 0:db8f063d50f0 | 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
akichika | 0:db8f063d50f0 | 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
akichika | 0:db8f063d50f0 | 21 | * THE SOFTWARE. |
akichika | 0:db8f063d50f0 | 22 | */ |
akichika | 0:db8f063d50f0 | 23 | |
akichika | 0:db8f063d50f0 | 24 | #include "AX12.h" |
akichika | 0:db8f063d50f0 | 25 | #include "mbed.h" |
akichika | 0:db8f063d50f0 | 26 | |
akichika | 0:db8f063d50f0 | 27 | AX12::AX12(PinName tx, PinName rx, int ID, int baud) |
akichika | 0:db8f063d50f0 | 28 | : _ax12(tx,rx) { |
akichika | 0:db8f063d50f0 | 29 | _baud = baud; |
akichika | 0:db8f063d50f0 | 30 | _ID = ID; |
akichika | 0:db8f063d50f0 | 31 | _ax12.baud(_baud); |
akichika | 0:db8f063d50f0 | 32 | |
akichika | 0:db8f063d50f0 | 33 | } |
akichika | 0:db8f063d50f0 | 34 | |
akichika | 0:db8f063d50f0 | 35 | // Set the mode of the servo |
akichika | 0:db8f063d50f0 | 36 | // 0 = Positional (0-300 degrees) |
akichika | 0:db8f063d50f0 | 37 | // 1 = Rotational -1 to 1 speed |
akichika | 0:db8f063d50f0 | 38 | int AX12::SetMode(int mode) { |
akichika | 0:db8f063d50f0 | 39 | |
akichika | 0:db8f063d50f0 | 40 | if (mode == 1) { // set CR |
akichika | 0:db8f063d50f0 | 41 | SetCWLimit(0); |
akichika | 0:db8f063d50f0 | 42 | SetCCWLimit(0); |
akichika | 0:db8f063d50f0 | 43 | SetCRSpeed(0.0); |
akichika | 0:db8f063d50f0 | 44 | } else { |
akichika | 0:db8f063d50f0 | 45 | SetCWLimit(0); |
akichika | 0:db8f063d50f0 | 46 | SetCCWLimit(300); |
akichika | 0:db8f063d50f0 | 47 | SetCRSpeed(0.0); |
akichika | 0:db8f063d50f0 | 48 | } |
akichika | 0:db8f063d50f0 | 49 | return(0); |
akichika | 0:db8f063d50f0 | 50 | } |
akichika | 0:db8f063d50f0 | 51 | |
akichika | 0:db8f063d50f0 | 52 | |
akichika | 0:db8f063d50f0 | 53 | // if flag[0] is set, were blocking |
akichika | 0:db8f063d50f0 | 54 | // if flag[1] is set, we're registering |
akichika | 0:db8f063d50f0 | 55 | // they are mutually exclusive operations |
akichika | 0:db8f063d50f0 | 56 | int AX12::SetGoal(int degrees, int flags) { |
akichika | 0:db8f063d50f0 | 57 | |
akichika | 0:db8f063d50f0 | 58 | char reg_flag = 0; |
akichika | 0:db8f063d50f0 | 59 | char data[2]; |
akichika | 0:db8f063d50f0 | 60 | |
akichika | 0:db8f063d50f0 | 61 | // set the flag is only the register bit is set in the flag |
akichika | 0:db8f063d50f0 | 62 | if (flags == 0x2) { |
akichika | 0:db8f063d50f0 | 63 | reg_flag = 1; |
akichika | 0:db8f063d50f0 | 64 | } |
akichika | 0:db8f063d50f0 | 65 | |
akichika | 0:db8f063d50f0 | 66 | // 1023 / 300 * degrees |
akichika | 0:db8f063d50f0 | 67 | short goal = (1023 * degrees) / 300; |
akichika | 0:db8f063d50f0 | 68 | #ifdef AX12_DEBUG |
akichika | 0:db8f063d50f0 | 69 | printf("SetGoal to 0x%x\n",goal); |
akichika | 0:db8f063d50f0 | 70 | #endif |
akichika | 0:db8f063d50f0 | 71 | |
akichika | 0:db8f063d50f0 | 72 | data[0] = goal & 0xff; // bottom 8 bits |
akichika | 0:db8f063d50f0 | 73 | data[1] = goal >> 8; // top 8 bits |
akichika | 0:db8f063d50f0 | 74 | |
akichika | 0:db8f063d50f0 | 75 | // write the packet, return the error code |
akichika | 0:db8f063d50f0 | 76 | int rVal = write(_ID, AX12_REG_GOAL_POSITION, 2, data, reg_flag); |
akichika | 0:db8f063d50f0 | 77 | |
akichika | 0:db8f063d50f0 | 78 | if (flags == 1) { |
akichika | 0:db8f063d50f0 | 79 | // block until it comes to a halt |
akichika | 0:db8f063d50f0 | 80 | while (isMoving()) {} |
akichika | 0:db8f063d50f0 | 81 | } |
akichika | 0:db8f063d50f0 | 82 | return(rVal); |
akichika | 0:db8f063d50f0 | 83 | } |
akichika | 0:db8f063d50f0 | 84 | |
akichika | 0:db8f063d50f0 | 85 | |
akichika | 0:db8f063d50f0 | 86 | // Set continuous rotation speed from -1 to 1 |
akichika | 0:db8f063d50f0 | 87 | int AX12::SetCRSpeed(float speed) { |
akichika | 0:db8f063d50f0 | 88 | |
akichika | 0:db8f063d50f0 | 89 | // bit 10 = direction, 0 = CCW, 1=CW |
akichika | 0:db8f063d50f0 | 90 | // bits 9-0 = Speed |
akichika | 0:db8f063d50f0 | 91 | char data[2]; |
akichika | 0:db8f063d50f0 | 92 | |
akichika | 0:db8f063d50f0 | 93 | int goal = (0x3ff * abs(speed)); |
akichika | 0:db8f063d50f0 | 94 | |
akichika | 0:db8f063d50f0 | 95 | // Set direction CW if we have a negative speed |
akichika | 0:db8f063d50f0 | 96 | if (speed < 0) { |
akichika | 0:db8f063d50f0 | 97 | goal |= (0x1 << 10); |
akichika | 0:db8f063d50f0 | 98 | } |
akichika | 0:db8f063d50f0 | 99 | |
akichika | 0:db8f063d50f0 | 100 | data[0] = goal & 0xff; // bottom 8 bits |
akichika | 0:db8f063d50f0 | 101 | data[1] = goal >> 8; // top 8 bits |
akichika | 0:db8f063d50f0 | 102 | |
akichika | 0:db8f063d50f0 | 103 | // write the packet, return the error code |
akichika | 0:db8f063d50f0 | 104 | int rVal = write(_ID, 0x20, 2, data); |
akichika | 0:db8f063d50f0 | 105 | |
akichika | 0:db8f063d50f0 | 106 | return(rVal); |
akichika | 0:db8f063d50f0 | 107 | } |
akichika | 0:db8f063d50f0 | 108 | |
akichika | 0:db8f063d50f0 | 109 | |
akichika | 0:db8f063d50f0 | 110 | int AX12::SetCWLimit (int degrees) { |
akichika | 0:db8f063d50f0 | 111 | |
akichika | 0:db8f063d50f0 | 112 | char data[2]; |
akichika | 0:db8f063d50f0 | 113 | |
akichika | 0:db8f063d50f0 | 114 | // 1023 / 300 * degrees |
akichika | 0:db8f063d50f0 | 115 | short limit = (1023 * degrees) / 300; |
akichika | 0:db8f063d50f0 | 116 | |
akichika | 0:db8f063d50f0 | 117 | #ifdef AX12_DEBUG |
akichika | 0:db8f063d50f0 | 118 | printf("SetCWLimit to 0x%x\n",limit); |
akichika | 0:db8f063d50f0 | 119 | #endif |
akichika | 0:db8f063d50f0 | 120 | |
akichika | 0:db8f063d50f0 | 121 | data[0] = limit & 0xff; // bottom 8 bits |
akichika | 0:db8f063d50f0 | 122 | data[1] = limit >> 8; // top 8 bits |
akichika | 0:db8f063d50f0 | 123 | |
akichika | 0:db8f063d50f0 | 124 | // write the packet, return the error code |
akichika | 0:db8f063d50f0 | 125 | return (write(_ID, AX12_REG_CW_LIMIT, 2, data)); |
akichika | 0:db8f063d50f0 | 126 | |
akichika | 0:db8f063d50f0 | 127 | } |
akichika | 0:db8f063d50f0 | 128 | |
akichika | 0:db8f063d50f0 | 129 | int AX12::SetCCWLimit (int degrees) { |
akichika | 0:db8f063d50f0 | 130 | |
akichika | 0:db8f063d50f0 | 131 | char data[2]; |
akichika | 0:db8f063d50f0 | 132 | |
akichika | 0:db8f063d50f0 | 133 | // 1023 / 300 * degrees |
akichika | 0:db8f063d50f0 | 134 | short limit = (1023 * degrees) / 300; |
akichika | 0:db8f063d50f0 | 135 | |
akichika | 0:db8f063d50f0 | 136 | #ifdef AX12_DEBUG |
akichika | 0:db8f063d50f0 | 137 | printf("SetCCWLimit to 0x%x\n",limit); |
akichika | 0:db8f063d50f0 | 138 | #endif |
akichika | 0:db8f063d50f0 | 139 | |
akichika | 0:db8f063d50f0 | 140 | data[0] = limit & 0xff; // bottom 8 bits |
akichika | 0:db8f063d50f0 | 141 | data[1] = limit >> 8; // top 8 bits |
akichika | 0:db8f063d50f0 | 142 | |
akichika | 0:db8f063d50f0 | 143 | // write the packet, return the error code |
akichika | 0:db8f063d50f0 | 144 | return (write(_ID, AX12_REG_CCW_LIMIT, 2, data)); |
akichika | 0:db8f063d50f0 | 145 | } |
akichika | 0:db8f063d50f0 | 146 | |
akichika | 0:db8f063d50f0 | 147 | |
akichika | 0:db8f063d50f0 | 148 | int AX12::SetID (int CurrentID, int NewID) { |
akichika | 0:db8f063d50f0 | 149 | |
akichika | 0:db8f063d50f0 | 150 | char data[1]; |
akichika | 0:db8f063d50f0 | 151 | data[0] = NewID; |
akichika | 0:db8f063d50f0 | 152 | |
akichika | 0:db8f063d50f0 | 153 | #ifdef AX12_DEBUG |
akichika | 0:db8f063d50f0 | 154 | printf("Setting ID from 0x%x to 0x%x\n",CurrentID,NewID); |
akichika | 0:db8f063d50f0 | 155 | #endif |
akichika | 0:db8f063d50f0 | 156 | |
akichika | 0:db8f063d50f0 | 157 | return (write(CurrentID, AX12_REG_ID, 1, data)); |
akichika | 0:db8f063d50f0 | 158 | |
akichika | 0:db8f063d50f0 | 159 | } |
akichika | 0:db8f063d50f0 | 160 | |
akichika | 0:db8f063d50f0 | 161 | |
akichika | 0:db8f063d50f0 | 162 | int AX12::SetBaud (int baud) { |
akichika | 0:db8f063d50f0 | 163 | |
akichika | 0:db8f063d50f0 | 164 | char data[1]; |
akichika | 0:db8f063d50f0 | 165 | data[0] = baud; |
akichika | 0:db8f063d50f0 | 166 | |
akichika | 0:db8f063d50f0 | 167 | #ifdef AX12_DEBUG |
akichika | 0:db8f063d50f0 | 168 | printf("Setting Baud rate to %d\n",baud); |
akichika | 0:db8f063d50f0 | 169 | #endif |
akichika | 0:db8f063d50f0 | 170 | |
akichika | 0:db8f063d50f0 | 171 | return (write(0xFE, AX12_REG_BAUD, 1, data)); |
akichika | 0:db8f063d50f0 | 172 | |
akichika | 0:db8f063d50f0 | 173 | } |
akichika | 0:db8f063d50f0 | 174 | |
akichika | 0:db8f063d50f0 | 175 | int AX12::SetTorqueEnable (bool enable) { |
akichika | 0:db8f063d50f0 | 176 | |
akichika | 0:db8f063d50f0 | 177 | char data[1]; |
akichika | 0:db8f063d50f0 | 178 | data[0] = (char)enable; // 0x01 means enable, 0x00 means disable |
akichika | 0:db8f063d50f0 | 179 | |
akichika | 0:db8f063d50f0 | 180 | #ifdef AX12_DEBUG |
akichika | 0:db8f063d50f0 | 181 | printf("Setting TorqueEnable bit to %d\n",enable); |
akichika | 0:db8f063d50f0 | 182 | #endif |
akichika | 0:db8f063d50f0 | 183 | |
akichika | 0:db8f063d50f0 | 184 | return (write(_ID, AX12_REG_TORQUE_ENABLE, 1, data)); |
akichika | 0:db8f063d50f0 | 185 | |
akichika | 0:db8f063d50f0 | 186 | } |
akichika | 0:db8f063d50f0 | 187 | |
akichika | 0:db8f063d50f0 | 188 | |
akichika | 0:db8f063d50f0 | 189 | // return 1 is the servo is still in flight |
akichika | 0:db8f063d50f0 | 190 | int AX12::isMoving(void) { |
akichika | 0:db8f063d50f0 | 191 | |
akichika | 0:db8f063d50f0 | 192 | char data[1]; |
akichika | 0:db8f063d50f0 | 193 | read(_ID,AX12_REG_MOVING,1,data); |
akichika | 0:db8f063d50f0 | 194 | return(data[0]); |
akichika | 0:db8f063d50f0 | 195 | } |
akichika | 0:db8f063d50f0 | 196 | |
akichika | 0:db8f063d50f0 | 197 | |
akichika | 0:db8f063d50f0 | 198 | void AX12::trigger(void) { |
akichika | 0:db8f063d50f0 | 199 | |
akichika | 0:db8f063d50f0 | 200 | char TxBuf[16]; |
akichika | 0:db8f063d50f0 | 201 | char sum = 0; |
akichika | 0:db8f063d50f0 | 202 | |
akichika | 0:db8f063d50f0 | 203 | #ifdef AX12_TRIGGER_DEBUG |
akichika | 0:db8f063d50f0 | 204 | // Build the TxPacket first in RAM, then we'll send in one go |
akichika | 0:db8f063d50f0 | 205 | printf("\nTriggered\n"); |
akichika | 0:db8f063d50f0 | 206 | printf("\nTrigger Packet\n Header : 0xFF, 0xFF\n"); |
akichika | 0:db8f063d50f0 | 207 | #endif |
akichika | 0:db8f063d50f0 | 208 | |
akichika | 0:db8f063d50f0 | 209 | TxBuf[0] = 0xFF; |
akichika | 0:db8f063d50f0 | 210 | TxBuf[1] = 0xFF; |
akichika | 0:db8f063d50f0 | 211 | |
akichika | 0:db8f063d50f0 | 212 | // ID - Broadcast |
akichika | 0:db8f063d50f0 | 213 | TxBuf[2] = 0xFE; |
akichika | 0:db8f063d50f0 | 214 | sum += TxBuf[2]; |
akichika | 0:db8f063d50f0 | 215 | |
akichika | 0:db8f063d50f0 | 216 | #ifdef AX12_TRIGGER_DEBUG |
akichika | 0:db8f063d50f0 | 217 | printf(" ID : %d\n",TxBuf[2]); |
akichika | 0:db8f063d50f0 | 218 | #endif |
akichika | 0:db8f063d50f0 | 219 | |
akichika | 0:db8f063d50f0 | 220 | // Length |
akichika | 0:db8f063d50f0 | 221 | TxBuf[3] = 0x02; |
akichika | 0:db8f063d50f0 | 222 | sum += TxBuf[3]; |
akichika | 0:db8f063d50f0 | 223 | |
akichika | 0:db8f063d50f0 | 224 | #ifdef AX12_TRIGGER_DEBUG |
akichika | 0:db8f063d50f0 | 225 | printf(" Length %d\n",TxBuf[3]); |
akichika | 0:db8f063d50f0 | 226 | #endif |
akichika | 0:db8f063d50f0 | 227 | |
akichika | 0:db8f063d50f0 | 228 | // Instruction - ACTION |
akichika | 0:db8f063d50f0 | 229 | TxBuf[4] = 0x04; |
akichika | 0:db8f063d50f0 | 230 | sum += TxBuf[4]; |
akichika | 0:db8f063d50f0 | 231 | |
akichika | 0:db8f063d50f0 | 232 | #ifdef AX12_TRIGGER_DEBUG |
akichika | 0:db8f063d50f0 | 233 | printf(" Instruction 0x%X\n",TxBuf[5]); |
akichika | 0:db8f063d50f0 | 234 | #endif |
akichika | 0:db8f063d50f0 | 235 | |
akichika | 0:db8f063d50f0 | 236 | // Checksum |
akichika | 0:db8f063d50f0 | 237 | TxBuf[5] = 0xFF - sum; |
akichika | 0:db8f063d50f0 | 238 | #ifdef AX12_TRIGGER_DEBUG |
akichika | 0:db8f063d50f0 | 239 | printf(" Checksum 0x%X\n",TxBuf[5]); |
akichika | 0:db8f063d50f0 | 240 | #endif |
akichika | 0:db8f063d50f0 | 241 | |
akichika | 0:db8f063d50f0 | 242 | // Transmit the packet in one burst with no pausing |
akichika | 0:db8f063d50f0 | 243 | for (int i = 0; i < 6 ; i++) { |
akichika | 0:db8f063d50f0 | 244 | _ax12.putc(TxBuf[i]); |
akichika | 0:db8f063d50f0 | 245 | } |
akichika | 0:db8f063d50f0 | 246 | |
akichika | 0:db8f063d50f0 | 247 | // This is a broadcast packet, so there will be no reply |
akichika | 0:db8f063d50f0 | 248 | return; |
akichika | 0:db8f063d50f0 | 249 | } |
akichika | 0:db8f063d50f0 | 250 | |
akichika | 0:db8f063d50f0 | 251 | |
akichika | 0:db8f063d50f0 | 252 | float AX12::GetPosition(void) { |
akichika | 0:db8f063d50f0 | 253 | |
akichika | 0:db8f063d50f0 | 254 | #ifdef AX12_DEBUG |
akichika | 0:db8f063d50f0 | 255 | printf("\nGetPosition(%d)",_ID); |
akichika | 0:db8f063d50f0 | 256 | #endif |
akichika | 0:db8f063d50f0 | 257 | |
akichika | 0:db8f063d50f0 | 258 | char data[2]; |
akichika | 0:db8f063d50f0 | 259 | |
akichika | 0:db8f063d50f0 | 260 | int ErrorCode = read(_ID, AX12_REG_POSITION, 2, data); |
akichika | 0:db8f063d50f0 | 261 | short position = data[0] + (data[1] << 8); |
akichika | 0:db8f063d50f0 | 262 | float angle = (position * 300)/1024; |
akichika | 0:db8f063d50f0 | 263 | |
akichika | 0:db8f063d50f0 | 264 | return (angle); |
akichika | 0:db8f063d50f0 | 265 | } |
akichika | 0:db8f063d50f0 | 266 | |
sype | 1:40bc0469fd51 | 267 | int AX12::GetSpeed(void) { |
sype | 1:40bc0469fd51 | 268 | |
sype | 1:40bc0469fd51 | 269 | printf("\nGetSpeed(%d)",_ID); |
sype | 1:40bc0469fd51 | 270 | |
sype | 1:40bc0469fd51 | 271 | char data[2]; |
sype | 1:40bc0469fd51 | 272 | |
sype | 1:40bc0469fd51 | 273 | int ErrorCode = read(_ID, 0x26, 2, data); |
sype | 1:40bc0469fd51 | 274 | int position = data[0] + (data[1] << 8); |
sype | 1:40bc0469fd51 | 275 | |
sype | 1:40bc0469fd51 | 276 | return (position); |
sype | 1:40bc0469fd51 | 277 | } |
akichika | 0:db8f063d50f0 | 278 | |
akichika | 0:db8f063d50f0 | 279 | float AX12::GetTemp (void) { |
akichika | 0:db8f063d50f0 | 280 | |
akichika | 0:db8f063d50f0 | 281 | #ifdef AX12_DEBUG |
akichika | 0:db8f063d50f0 | 282 | printf("\nGetTemp(%d)",_ID); |
akichika | 0:db8f063d50f0 | 283 | #endif |
akichika | 0:db8f063d50f0 | 284 | |
akichika | 0:db8f063d50f0 | 285 | char data[1]; |
akichika | 0:db8f063d50f0 | 286 | int ErrorCode = read(_ID, AX12_REG_TEMP, 1, data); |
akichika | 0:db8f063d50f0 | 287 | float temp = data[0]; |
akichika | 0:db8f063d50f0 | 288 | return(temp); |
akichika | 0:db8f063d50f0 | 289 | } |
akichika | 0:db8f063d50f0 | 290 | |
akichika | 0:db8f063d50f0 | 291 | |
akichika | 0:db8f063d50f0 | 292 | float AX12::GetVolts (void) { |
akichika | 0:db8f063d50f0 | 293 | |
akichika | 0:db8f063d50f0 | 294 | #ifdef AX12_DEBUG |
akichika | 0:db8f063d50f0 | 295 | printf("\nGetVolts(%d)",_ID); |
akichika | 0:db8f063d50f0 | 296 | #endif |
akichika | 0:db8f063d50f0 | 297 | |
akichika | 0:db8f063d50f0 | 298 | char data[1]; |
akichika | 0:db8f063d50f0 | 299 | int ErrorCode = read(_ID, AX12_REG_VOLTS, 1, data); |
akichika | 0:db8f063d50f0 | 300 | float volts = data[0]/10.0; |
akichika | 0:db8f063d50f0 | 301 | return(volts); |
akichika | 0:db8f063d50f0 | 302 | } |
akichika | 0:db8f063d50f0 | 303 | |
akichika | 0:db8f063d50f0 | 304 | |
akichika | 0:db8f063d50f0 | 305 | int AX12::read(int ID, int start, int bytes, char* data) { |
akichika | 0:db8f063d50f0 | 306 | |
akichika | 0:db8f063d50f0 | 307 | char PacketLength = 0x4; |
akichika | 0:db8f063d50f0 | 308 | char TxBuf[16]; |
akichika | 0:db8f063d50f0 | 309 | char sum = 0; |
akichika | 0:db8f063d50f0 | 310 | char Status[16]; |
akichika | 0:db8f063d50f0 | 311 | |
akichika | 0:db8f063d50f0 | 312 | Status[4] = 0xFE; // return code |
akichika | 0:db8f063d50f0 | 313 | |
akichika | 0:db8f063d50f0 | 314 | #ifdef AX12_READ_DEBUG |
akichika | 0:db8f063d50f0 | 315 | printf("\nread(%d,0x%x,%d,data)\n",ID,start,bytes); |
akichika | 0:db8f063d50f0 | 316 | #endif |
akichika | 0:db8f063d50f0 | 317 | |
akichika | 0:db8f063d50f0 | 318 | // Build the TxPacket first in RAM, then we'll send in one go |
akichika | 0:db8f063d50f0 | 319 | #ifdef AX12_READ_DEBUG |
akichika | 0:db8f063d50f0 | 320 | printf("\nInstruction Packet\n Header : 0xFF, 0xFF\n"); |
akichika | 0:db8f063d50f0 | 321 | #endif |
akichika | 0:db8f063d50f0 | 322 | |
akichika | 0:db8f063d50f0 | 323 | TxBuf[0] = 0xff; |
akichika | 0:db8f063d50f0 | 324 | TxBuf[1] = 0xff; |
akichika | 0:db8f063d50f0 | 325 | |
akichika | 0:db8f063d50f0 | 326 | // ID |
akichika | 0:db8f063d50f0 | 327 | TxBuf[2] = ID; |
akichika | 0:db8f063d50f0 | 328 | sum += TxBuf[2]; |
akichika | 0:db8f063d50f0 | 329 | |
akichika | 0:db8f063d50f0 | 330 | #ifdef AX12_READ_DEBUG |
akichika | 0:db8f063d50f0 | 331 | printf(" ID : %d\n",TxBuf[2]); |
akichika | 0:db8f063d50f0 | 332 | #endif |
akichika | 0:db8f063d50f0 | 333 | |
akichika | 0:db8f063d50f0 | 334 | // Packet Length |
akichika | 0:db8f063d50f0 | 335 | TxBuf[3] = PacketLength; // Length = 4 ; 2 + 1 (start) = 1 (bytes) |
akichika | 0:db8f063d50f0 | 336 | sum += TxBuf[3]; // Accululate the packet sum |
akichika | 0:db8f063d50f0 | 337 | |
akichika | 0:db8f063d50f0 | 338 | #ifdef AX12_READ_DEBUG |
akichika | 0:db8f063d50f0 | 339 | printf(" Length : 0x%x\n",TxBuf[3]); |
akichika | 0:db8f063d50f0 | 340 | #endif |
akichika | 0:db8f063d50f0 | 341 | |
akichika | 0:db8f063d50f0 | 342 | // Instruction - Read |
akichika | 0:db8f063d50f0 | 343 | TxBuf[4] = 0x2; |
akichika | 0:db8f063d50f0 | 344 | sum += TxBuf[4]; |
akichika | 0:db8f063d50f0 | 345 | |
akichika | 0:db8f063d50f0 | 346 | #ifdef AX12_READ_DEBUG |
akichika | 0:db8f063d50f0 | 347 | printf(" Instruction : 0x%x\n",TxBuf[4]); |
akichika | 0:db8f063d50f0 | 348 | #endif |
akichika | 0:db8f063d50f0 | 349 | |
akichika | 0:db8f063d50f0 | 350 | // Start Address |
akichika | 0:db8f063d50f0 | 351 | TxBuf[5] = start; |
akichika | 0:db8f063d50f0 | 352 | sum += TxBuf[5]; |
akichika | 0:db8f063d50f0 | 353 | |
akichika | 0:db8f063d50f0 | 354 | #ifdef AX12_READ_DEBUG |
akichika | 0:db8f063d50f0 | 355 | printf(" Start Address : 0x%x\n",TxBuf[5]); |
akichika | 0:db8f063d50f0 | 356 | #endif |
akichika | 0:db8f063d50f0 | 357 | |
akichika | 0:db8f063d50f0 | 358 | // Bytes to read |
akichika | 0:db8f063d50f0 | 359 | TxBuf[6] = bytes; |
akichika | 0:db8f063d50f0 | 360 | sum += TxBuf[6]; |
akichika | 0:db8f063d50f0 | 361 | |
akichika | 0:db8f063d50f0 | 362 | #ifdef AX12_READ_DEBUG |
akichika | 0:db8f063d50f0 | 363 | printf(" No bytes : 0x%x\n",TxBuf[6]); |
akichika | 0:db8f063d50f0 | 364 | #endif |
akichika | 0:db8f063d50f0 | 365 | |
akichika | 0:db8f063d50f0 | 366 | // Checksum |
akichika | 0:db8f063d50f0 | 367 | TxBuf[7] = 0xFF - sum; |
akichika | 0:db8f063d50f0 | 368 | #ifdef AX12_READ_DEBUG |
akichika | 0:db8f063d50f0 | 369 | printf(" Checksum : 0x%x\n",TxBuf[7]); |
akichika | 0:db8f063d50f0 | 370 | #endif |
akichika | 0:db8f063d50f0 | 371 | |
akichika | 0:db8f063d50f0 | 372 | // Transmit the packet in one burst with no pausing |
akichika | 0:db8f063d50f0 | 373 | for (int i = 0; i<8 ; i++) { |
akichika | 0:db8f063d50f0 | 374 | _ax12.putc(TxBuf[i]); |
akichika | 0:db8f063d50f0 | 375 | } |
akichika | 0:db8f063d50f0 | 376 | |
akichika | 0:db8f063d50f0 | 377 | // Wait for the bytes to be transmitted |
akichika | 0:db8f063d50f0 | 378 | wait (0.00002); |
akichika | 0:db8f063d50f0 | 379 | |
akichika | 0:db8f063d50f0 | 380 | // Skip if the read was to the broadcast address |
akichika | 0:db8f063d50f0 | 381 | if (_ID != 0xFE) { |
akichika | 0:db8f063d50f0 | 382 | |
akichika | 0:db8f063d50f0 | 383 | |
akichika | 0:db8f063d50f0 | 384 | |
akichika | 0:db8f063d50f0 | 385 | // response packet is always 6 + bytes |
akichika | 0:db8f063d50f0 | 386 | // 0xFF, 0xFF, ID, Length Error, Param(s) Checksum |
akichika | 0:db8f063d50f0 | 387 | // timeout is a little more than the time to transmit |
akichika | 0:db8f063d50f0 | 388 | // the packet back, i.e. (6+bytes)*10 bit periods |
akichika | 0:db8f063d50f0 | 389 | |
akichika | 0:db8f063d50f0 | 390 | int timeout = 0; |
akichika | 0:db8f063d50f0 | 391 | int plen = 0; |
akichika | 0:db8f063d50f0 | 392 | while ((timeout < ((6+bytes)*10)) && (plen<(6+bytes))) { |
akichika | 0:db8f063d50f0 | 393 | |
akichika | 0:db8f063d50f0 | 394 | if (_ax12.readable()) { |
akichika | 0:db8f063d50f0 | 395 | Status[plen] = _ax12.getc(); |
akichika | 0:db8f063d50f0 | 396 | plen++; |
akichika | 0:db8f063d50f0 | 397 | timeout = 0; |
akichika | 0:db8f063d50f0 | 398 | } |
akichika | 0:db8f063d50f0 | 399 | |
akichika | 0:db8f063d50f0 | 400 | // wait for the bit period |
akichika | 0:db8f063d50f0 | 401 | wait (1.0/_baud); |
akichika | 0:db8f063d50f0 | 402 | timeout++; |
akichika | 0:db8f063d50f0 | 403 | } |
akichika | 0:db8f063d50f0 | 404 | |
akichika | 0:db8f063d50f0 | 405 | if (timeout == ((6+bytes)*10) ) { |
akichika | 0:db8f063d50f0 | 406 | return(-1); |
akichika | 0:db8f063d50f0 | 407 | } |
akichika | 0:db8f063d50f0 | 408 | |
akichika | 0:db8f063d50f0 | 409 | // Copy the data from Status into data for return |
akichika | 0:db8f063d50f0 | 410 | for (int i=0; i < Status[3]-2 ; i++) { |
akichika | 0:db8f063d50f0 | 411 | data[i] = Status[5+i]; |
akichika | 0:db8f063d50f0 | 412 | } |
akichika | 0:db8f063d50f0 | 413 | |
akichika | 0:db8f063d50f0 | 414 | #ifdef AX12_READ_DEBUG |
akichika | 0:db8f063d50f0 | 415 | printf("\nStatus Packet\n"); |
akichika | 0:db8f063d50f0 | 416 | printf(" Header : 0x%x\n",Status[0]); |
akichika | 0:db8f063d50f0 | 417 | printf(" Header : 0x%x\n",Status[1]); |
akichika | 0:db8f063d50f0 | 418 | printf(" ID : 0x%x\n",Status[2]); |
akichika | 0:db8f063d50f0 | 419 | printf(" Length : 0x%x\n",Status[3]); |
akichika | 0:db8f063d50f0 | 420 | printf(" Error Code : 0x%x\n",Status[4]); |
akichika | 0:db8f063d50f0 | 421 | |
akichika | 0:db8f063d50f0 | 422 | for (int i=0; i < Status[3]-2 ; i++) { |
akichika | 0:db8f063d50f0 | 423 | printf(" Data : 0x%x\n",Status[5+i]); |
akichika | 0:db8f063d50f0 | 424 | } |
akichika | 0:db8f063d50f0 | 425 | |
akichika | 0:db8f063d50f0 | 426 | printf(" Checksum : 0x%x\n",Status[5+(Status[3]-2)]); |
akichika | 0:db8f063d50f0 | 427 | #endif |
akichika | 0:db8f063d50f0 | 428 | |
akichika | 0:db8f063d50f0 | 429 | } // if (ID!=0xFE) |
akichika | 0:db8f063d50f0 | 430 | |
akichika | 0:db8f063d50f0 | 431 | return(Status[4]); |
akichika | 0:db8f063d50f0 | 432 | } |
akichika | 0:db8f063d50f0 | 433 | |
akichika | 0:db8f063d50f0 | 434 | |
akichika | 0:db8f063d50f0 | 435 | int AX12::write(int ID, int start, int bytes, char* data, int flag) { |
akichika | 0:db8f063d50f0 | 436 | // 0xff, 0xff, ID, Length, Intruction(write), Address, Param(s), Checksum |
akichika | 0:db8f063d50f0 | 437 | |
akichika | 0:db8f063d50f0 | 438 | char TxBuf[16]; |
akichika | 0:db8f063d50f0 | 439 | char sum = 0; |
akichika | 0:db8f063d50f0 | 440 | char Status[6]; |
akichika | 0:db8f063d50f0 | 441 | |
akichika | 0:db8f063d50f0 | 442 | #ifdef AX12_WRITE_DEBUG |
akichika | 0:db8f063d50f0 | 443 | printf("\nwrite(%d,0x%x,%d,data,%d)\n",ID,start,bytes,flag); |
akichika | 0:db8f063d50f0 | 444 | #endif |
akichika | 0:db8f063d50f0 | 445 | |
akichika | 0:db8f063d50f0 | 446 | // Build the TxPacket first in RAM, then we'll send in one go |
akichika | 0:db8f063d50f0 | 447 | #ifdef AX12_WRITE_DEBUG |
akichika | 0:db8f063d50f0 | 448 | printf("\nInstruction Packet\n Header : 0xFF, 0xFF\n"); |
akichika | 0:db8f063d50f0 | 449 | #endif |
akichika | 0:db8f063d50f0 | 450 | |
akichika | 0:db8f063d50f0 | 451 | TxBuf[0] = 0xff; |
akichika | 0:db8f063d50f0 | 452 | TxBuf[1] = 0xff; |
akichika | 0:db8f063d50f0 | 453 | |
akichika | 0:db8f063d50f0 | 454 | // ID |
akichika | 0:db8f063d50f0 | 455 | TxBuf[2] = ID; |
akichika | 0:db8f063d50f0 | 456 | sum += TxBuf[2]; |
akichika | 0:db8f063d50f0 | 457 | |
akichika | 0:db8f063d50f0 | 458 | #ifdef AX12_WRITE_DEBUG |
akichika | 0:db8f063d50f0 | 459 | printf(" ID : %d\n",TxBuf[2]); |
akichika | 0:db8f063d50f0 | 460 | #endif |
akichika | 0:db8f063d50f0 | 461 | |
akichika | 0:db8f063d50f0 | 462 | // packet Length |
akichika | 0:db8f063d50f0 | 463 | TxBuf[3] = 3+bytes; |
akichika | 0:db8f063d50f0 | 464 | sum += TxBuf[3]; |
akichika | 0:db8f063d50f0 | 465 | |
akichika | 0:db8f063d50f0 | 466 | #ifdef AX12_WRITE_DEBUG |
akichika | 0:db8f063d50f0 | 467 | printf(" Length : %d\n",TxBuf[3]); |
akichika | 0:db8f063d50f0 | 468 | #endif |
akichika | 0:db8f063d50f0 | 469 | |
akichika | 0:db8f063d50f0 | 470 | // Instruction |
akichika | 0:db8f063d50f0 | 471 | if (flag == 1) { |
akichika | 0:db8f063d50f0 | 472 | TxBuf[4]=0x04; |
akichika | 0:db8f063d50f0 | 473 | sum += TxBuf[4]; |
akichika | 0:db8f063d50f0 | 474 | } else { |
akichika | 0:db8f063d50f0 | 475 | TxBuf[4]=0x03; |
akichika | 0:db8f063d50f0 | 476 | sum += TxBuf[4]; |
akichika | 0:db8f063d50f0 | 477 | } |
akichika | 0:db8f063d50f0 | 478 | |
akichika | 0:db8f063d50f0 | 479 | #ifdef AX12_WRITE_DEBUG |
akichika | 0:db8f063d50f0 | 480 | printf(" Instruction : 0x%x\n",TxBuf[4]); |
akichika | 0:db8f063d50f0 | 481 | #endif |
akichika | 0:db8f063d50f0 | 482 | |
akichika | 0:db8f063d50f0 | 483 | // Start Address |
akichika | 0:db8f063d50f0 | 484 | TxBuf[5] = start; |
akichika | 0:db8f063d50f0 | 485 | sum += TxBuf[5]; |
akichika | 0:db8f063d50f0 | 486 | |
akichika | 0:db8f063d50f0 | 487 | #ifdef AX12_WRITE_DEBUG |
akichika | 0:db8f063d50f0 | 488 | printf(" Start : 0x%x\n",TxBuf[5]); |
akichika | 0:db8f063d50f0 | 489 | #endif |
akichika | 0:db8f063d50f0 | 490 | |
akichika | 0:db8f063d50f0 | 491 | // data |
akichika | 0:db8f063d50f0 | 492 | for (char i=0; i<bytes ; i++) { |
akichika | 0:db8f063d50f0 | 493 | TxBuf[6+i] = data[i]; |
akichika | 0:db8f063d50f0 | 494 | sum += TxBuf[6+i]; |
akichika | 0:db8f063d50f0 | 495 | |
akichika | 0:db8f063d50f0 | 496 | #ifdef AX12_WRITE_DEBUG |
akichika | 0:db8f063d50f0 | 497 | printf(" Data : 0x%x\n",TxBuf[6+i]); |
akichika | 0:db8f063d50f0 | 498 | #endif |
akichika | 0:db8f063d50f0 | 499 | |
akichika | 0:db8f063d50f0 | 500 | } |
akichika | 0:db8f063d50f0 | 501 | |
akichika | 0:db8f063d50f0 | 502 | // checksum |
akichika | 0:db8f063d50f0 | 503 | TxBuf[6+bytes] = 0xFF - sum; |
akichika | 0:db8f063d50f0 | 504 | |
akichika | 0:db8f063d50f0 | 505 | #ifdef AX12_WRITE_DEBUG |
akichika | 0:db8f063d50f0 | 506 | printf(" Checksum : 0x%x\n",TxBuf[6+bytes]); |
akichika | 0:db8f063d50f0 | 507 | #endif |
akichika | 0:db8f063d50f0 | 508 | |
akichika | 0:db8f063d50f0 | 509 | // Transmit the packet in one burst with no pausing |
akichika | 0:db8f063d50f0 | 510 | for (int i = 0; i < (7 + bytes) ; i++) { |
akichika | 0:db8f063d50f0 | 511 | _ax12.putc(TxBuf[i]); |
akichika | 0:db8f063d50f0 | 512 | } |
akichika | 0:db8f063d50f0 | 513 | |
akichika | 0:db8f063d50f0 | 514 | // Wait for data to transmit |
akichika | 0:db8f063d50f0 | 515 | wait (0.00002); |
akichika | 0:db8f063d50f0 | 516 | |
akichika | 0:db8f063d50f0 | 517 | // make sure we have a valid return |
akichika | 0:db8f063d50f0 | 518 | Status[4]=0x00; |
akichika | 0:db8f063d50f0 | 519 | |
akichika | 0:db8f063d50f0 | 520 | // we'll only get a reply if it was not broadcast |
akichika | 0:db8f063d50f0 | 521 | if (_ID!=0xFE) { |
akichika | 0:db8f063d50f0 | 522 | |
akichika | 0:db8f063d50f0 | 523 | |
akichika | 0:db8f063d50f0 | 524 | // response packet is always 6 bytes |
akichika | 0:db8f063d50f0 | 525 | // 0xFF, 0xFF, ID, Length Error, Param(s) Checksum |
akichika | 0:db8f063d50f0 | 526 | // timeout is a little more than the time to transmit |
akichika | 0:db8f063d50f0 | 527 | // the packet back, i.e. 60 bit periods, round up to 100 |
akichika | 0:db8f063d50f0 | 528 | int timeout = 0; |
akichika | 0:db8f063d50f0 | 529 | int plen = 0; |
akichika | 0:db8f063d50f0 | 530 | while ((timeout < 100) && (plen<6)) { |
akichika | 0:db8f063d50f0 | 531 | |
akichika | 0:db8f063d50f0 | 532 | if (_ax12.readable()) { |
akichika | 0:db8f063d50f0 | 533 | Status[plen] = _ax12.getc(); |
akichika | 0:db8f063d50f0 | 534 | plen++; |
akichika | 0:db8f063d50f0 | 535 | timeout = 0; |
akichika | 0:db8f063d50f0 | 536 | } |
akichika | 0:db8f063d50f0 | 537 | |
akichika | 0:db8f063d50f0 | 538 | // wait for the bit period |
akichika | 0:db8f063d50f0 | 539 | wait (1.0/_baud); |
akichika | 0:db8f063d50f0 | 540 | timeout++; |
akichika | 0:db8f063d50f0 | 541 | } |
akichika | 0:db8f063d50f0 | 542 | |
akichika | 0:db8f063d50f0 | 543 | |
akichika | 0:db8f063d50f0 | 544 | // Build the TxPacket first in RAM, then we'll send in one go |
akichika | 0:db8f063d50f0 | 545 | #ifdef AX12_WRITE_DEBUG |
akichika | 0:db8f063d50f0 | 546 | printf("\nStatus Packet\n Header : 0x%X, 0x%X\n",Status[0],Status[1]); |
akichika | 0:db8f063d50f0 | 547 | printf(" ID : %d\n",Status[2]); |
akichika | 0:db8f063d50f0 | 548 | printf(" Length : %d\n",Status[3]); |
akichika | 0:db8f063d50f0 | 549 | printf(" Error : 0x%x\n",Status[4]); |
akichika | 0:db8f063d50f0 | 550 | printf(" Checksum : 0x%x\n",Status[5]); |
akichika | 0:db8f063d50f0 | 551 | #endif |
akichika | 0:db8f063d50f0 | 552 | |
akichika | 0:db8f063d50f0 | 553 | |
akichika | 0:db8f063d50f0 | 554 | } |
akichika | 0:db8f063d50f0 | 555 | |
akichika | 0:db8f063d50f0 | 556 | return(Status[4]); // return error code |
akichika | 0:db8f063d50f0 | 557 | } |