intiial commit

Dependencies:   MAX8614X USBDevice max32630hsp_test

Committer:
phonemacro
Date:
Thu Aug 16 20:12:20 2018 +0000
Revision:
11:ec7998257ec2
Parent:
10:0b940aff3bb8
Child:
12:fc888315e5fd
pass in the MAX8614X object

Who changed what in which revision?

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phonemacro 0:9e5a4f845510 1 /**********************************************************************
phonemacro 1:854f8a89a527 2 * Copyright (C) 2018 Maxim Integrated Products, Inc., All Rights Reserved.
phonemacro 0:9e5a4f845510 3 *
phonemacro 0:9e5a4f845510 4 * Permission is hereby granted, free of charge, to any person obtaining a
phonemacro 0:9e5a4f845510 5 * copy of this software and associated documentation files (the "Software"),
phonemacro 0:9e5a4f845510 6 * to deal in the Software without restriction, including without limitation
phonemacro 0:9e5a4f845510 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
phonemacro 0:9e5a4f845510 8 * and/or sell copies of the Software, and to permit persons to whom the
phonemacro 0:9e5a4f845510 9 * Software is furnished to do so, subject to the following conditions:
phonemacro 0:9e5a4f845510 10 *
phonemacro 0:9e5a4f845510 11 * The above copyright notice and this permission notice shall be included
phonemacro 0:9e5a4f845510 12 * in all copies or substantial portions of the Software.
phonemacro 0:9e5a4f845510 13 *
phonemacro 0:9e5a4f845510 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
phonemacro 0:9e5a4f845510 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
phonemacro 0:9e5a4f845510 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
phonemacro 0:9e5a4f845510 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
phonemacro 0:9e5a4f845510 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
phonemacro 0:9e5a4f845510 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
phonemacro 0:9e5a4f845510 20 * OTHER DEALINGS IN THE SOFTWARE.
phonemacro 0:9e5a4f845510 21 *
phonemacro 0:9e5a4f845510 22 * Except as contained in this notice, the name of Maxim Integrated
phonemacro 0:9e5a4f845510 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
phonemacro 0:9e5a4f845510 24 * Products, Inc. Branding Policy.
phonemacro 0:9e5a4f845510 25 *
phonemacro 0:9e5a4f845510 26 * The mere transfer of this software does not imply any licenses
phonemacro 0:9e5a4f845510 27 * of trade secrets, proprietary technology, copyrights, patents,
phonemacro 0:9e5a4f845510 28 * trademarks, maskwork rights, or any other form of intellectual
phonemacro 0:9e5a4f845510 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
phonemacro 0:9e5a4f845510 30 * ownership rights.
phonemacro 0:9e5a4f845510 31 **********************************************************************/
phonemacro 0:9e5a4f845510 32
phonemacro 0:9e5a4f845510 33
phonemacro 0:9e5a4f845510 34 #include "mbed.h"
phonemacro 0:9e5a4f845510 35 //#include "max32630fthr.h"
phonemacro 0:9e5a4f845510 36 #include "max32630hsp.h"
phonemacro 0:9e5a4f845510 37 #include "MAX8614X.h"
phonemacro 0:9e5a4f845510 38 #include "USBSerial.h"
phonemacro 11:ec7998257ec2 39 void executeSha256(MAX8614X &m, uint8_t *challenge, unsigned int challengeLen);
phonemacro 7:5b7f7ec9efe0 40
phonemacro 0:9e5a4f845510 41
phonemacro 0:9e5a4f845510 42 MAX32630HSP icarus(MAX32630HSP::VIO_1V8);
phonemacro 0:9e5a4f845510 43 // MAX32630FTHR mbed_board(MAX32630FTHR::VIO_1V8);
phonemacro 0:9e5a4f845510 44 SPI spi(P5_1, P5_2, P5_0); /* mosi, miso, sclk */
phonemacro 3:2272f89aad7e 45 //DigitalOut cs(P3_0);
phonemacro 3:2272f89aad7e 46 DigitalOut cs(P5_3);
phonemacro 6:0ec9dd0e8eb0 47 //PinName interrupt_pin = P3_3;
phonemacro 6:0ec9dd0e8eb0 48 //PinnName interrupt_pin = P5_7;
phonemacro 6:0ec9dd0e8eb0 49 //PinName interrupt_pin = P5_5;
phonemacro 6:0ec9dd0e8eb0 50 //PinName interrupt_pin = P3_6;
phonemacro 6:0ec9dd0e8eb0 51 //PinName interrupt_pin = P3_7;
phonemacro 6:0ec9dd0e8eb0 52 //PinName interrupt_pin = P3_2;
phonemacro 6:0ec9dd0e8eb0 53 PinName interrupt_pin = P5_4;
phonemacro 0:9e5a4f845510 54 // Virtual serial port over USB
phonemacro 0:9e5a4f845510 55 USBSerial microUSB;
phonemacro 0:9e5a4f845510 56
phonemacro 0:9e5a4f845510 57 DigitalOut rLED(LED1);
phonemacro 0:9e5a4f845510 58 DigitalOut gLED(LED2);
phonemacro 0:9e5a4f845510 59 DigitalOut bLED(LED3);
phonemacro 0:9e5a4f845510 60 int main()
phonemacro 0:9e5a4f845510 61 {
phonemacro 7:5b7f7ec9efe0 62 #define CHALLENGE_SZ_NO_SECRET 20
phonemacro 10:0b940aff3bb8 63 uint8_t challenge_1[CHALLENGE_SZ_NO_SECRET] = { // 160 bit
phonemacro 10:0b940aff3bb8 64 #if 0
phonemacro 10:0b940aff3bb8 65 0x24, 0x35, 0x81, 0x5e,
phonemacro 10:0b940aff3bb8 66 0x09, 0xd6, 0x63, 0x56,
phonemacro 10:0b940aff3bb8 67 0x0d, 0x7b, 0x8d, 0x99,
phonemacro 10:0b940aff3bb8 68 0x65, 0x84, 0x12, 0x52,
phonemacro 10:0b940aff3bb8 69 0x01, 0xe3, 0x0d, 0xcd
phonemacro 10:0b940aff3bb8 70 #endif
phonemacro 10:0b940aff3bb8 71 #if 1
phonemacro 10:0b940aff3bb8 72 0x5e, 0x81, 0x35, 0x24,
phonemacro 10:0b940aff3bb8 73 0x56, 0x63, 0xd6, 0x09,
phonemacro 10:0b940aff3bb8 74 0x99, 0x8d, 0x7b, 0x0d,
phonemacro 10:0b940aff3bb8 75 0x52, 0x12, 0x84, 0x65,
phonemacro 10:0b940aff3bb8 76 0xcd, 0x0d, 0xe3, 0x01
phonemacro 10:0b940aff3bb8 77 #endif
phonemacro 10:0b940aff3bb8 78 #if 0
phonemacro 10:0b940aff3bb8 79 1, 0, 0, 0,
phonemacro 10:0b940aff3bb8 80 0, 0, 0, 0,
phonemacro 10:0b940aff3bb8 81 0, 0, 0, 0,
phonemacro 10:0b940aff3bb8 82 0, 0, 0, 0,
phonemacro 10:0b940aff3bb8 83 0, 0, 0, 0
phonemacro 10:0b940aff3bb8 84 #endif
phonemacro 4:46919eec2c28 85 };
phonemacro 4:46919eec2c28 86
phonemacro 5:df9f75bee8ac 87 #define MAC_SZ 32
phonemacro 7:5b7f7ec9efe0 88
phonemacro 0:9e5a4f845510 89
phonemacro 0:9e5a4f845510 90 // daplink.printf("daplink serial port\r\n");
phonemacro 0:9e5a4f845510 91 // microUSB.printf("micro USB serial port\r\n");
phonemacro 0:9e5a4f845510 92 rLED = LED_ON;
phonemacro 0:9e5a4f845510 93 gLED = LED_ON;
phonemacro 0:9e5a4f845510 94 bLED = LED_OFF;
phonemacro 0:9e5a4f845510 95
phonemacro 0:9e5a4f845510 96 rLED = LED_OFF;
phonemacro 1:854f8a89a527 97 printf("\r\n\rmax86140 authenication software\r\n");
phonemacro 11:ec7998257ec2 98 MAX8614X m(spi,cs,interrupt_pin);
phonemacro 11:ec7998257ec2 99 // MAX8614X m(spi,cs,interrupt_pin);
phonemacro 7:5b7f7ec9efe0 100 // m.readRegister(MAX8614X::MAX8614X_PART_ID_REG, data, 1);
phonemacro 7:5b7f7ec9efe0 101 // printf("device id should be 0x24, reg %02X = %02X\r\n", MAX8614X::MAX8614X_PART_ID_REG, data[0]);
phonemacro 3:2272f89aad7e 102
phonemacro 11:ec7998257ec2 103 executeSha256(m, challenge_1, CHALLENGE_SZ_NO_SECRET);
phonemacro 5:df9f75bee8ac 104 //● Compare MAC from MAX86140 wth Host's precalculated MAC.
phonemacro 4:46919eec2c28 105 //● Check PASS or FAIL.
phonemacro 4:46919eec2c28 106 //● Disable SHA_EN bit ( Write 0 to SHA_EN bit).
phonemacro 0:9e5a4f845510 107 while(1) {
phonemacro 1:854f8a89a527 108 gLED = !gLED;
phonemacro 0:9e5a4f845510 109 wait(1.0);
phonemacro 0:9e5a4f845510 110 }
phonemacro 0:9e5a4f845510 111 }
phonemacro 0:9e5a4f845510 112
phonemacro 10:0b940aff3bb8 113 #if 0
phonemacro 7:5b7f7ec9efe0 114 void transformData(uint8_t *inData, uint8_t *outData, unsigned int challengeLen)
phonemacro 7:5b7f7ec9efe0 115 {
phonemacro 7:5b7f7ec9efe0 116 int i, j, k;
phonemacro 7:5b7f7ec9efe0 117 k = 0;
phonemacro 7:5b7f7ec9efe0 118 for (i = 0; i < (challengeLen/4); i++) {
phonemacro 7:5b7f7ec9efe0 119 for (j = 3; j >= 0; j--) {
phonemacro 7:5b7f7ec9efe0 120 outData[j+(i*4)] = inData[k];
phonemacro 7:5b7f7ec9efe0 121 k++;
phonemacro 7:5b7f7ec9efe0 122 }
phonemacro 7:5b7f7ec9efe0 123 }
phonemacro 7:5b7f7ec9efe0 124 }
phonemacro 10:0b940aff3bb8 125 #endif
phonemacro 10:0b940aff3bb8 126 void transformData(uint8_t *inData, uint8_t *outData, unsigned int challengeLen)
phonemacro 10:0b940aff3bb8 127 {
phonemacro 10:0b940aff3bb8 128 int i, j, k;
phonemacro 10:0b940aff3bb8 129 k = 0;
phonemacro 10:0b940aff3bb8 130 for (i = 0; i < (challengeLen/4); i++) {
phonemacro 10:0b940aff3bb8 131 for (j = 3; j >= 0; j--) {
phonemacro 10:0b940aff3bb8 132 outData[j+(i*4)] = inData[k];
phonemacro 10:0b940aff3bb8 133 // printf("%02X ",inData[k]);
phonemacro 10:0b940aff3bb8 134 k++;
phonemacro 10:0b940aff3bb8 135 }
phonemacro 10:0b940aff3bb8 136 // printf("\r\n");
phonemacro 10:0b940aff3bb8 137 }
phonemacro 10:0b940aff3bb8 138 for (i=0; i < challengeLen; i++) {
phonemacro 10:0b940aff3bb8 139 // if (!(i % 4))
phonemacro 10:0b940aff3bb8 140 // printf("\r\n ");
phonemacro 10:0b940aff3bb8 141 // printf("%02X ",outData[i]);
phonemacro 10:0b940aff3bb8 142 }
phonemacro 10:0b940aff3bb8 143 }
phonemacro 7:5b7f7ec9efe0 144
phonemacro 7:5b7f7ec9efe0 145
phonemacro 11:ec7998257ec2 146 void executeSha256(MAX8614X &m, uint8_t *challenge, unsigned int challengeLen)
phonemacro 7:5b7f7ec9efe0 147 {
phonemacro 10:0b940aff3bb8 148 int i, j, k;
phonemacro 7:5b7f7ec9efe0 149 uint8_t macData[256];
phonemacro 10:0b940aff3bb8 150 uint8_t inData[256];
phonemacro 7:5b7f7ec9efe0 151 uint8_t xData[256];
phonemacro 10:0b940aff3bb8 152 uint32_t x32Data[64];
phonemacro 7:5b7f7ec9efe0 153 uint32_t tmpData;
phonemacro 10:0b940aff3bb8 154 const unsigned int responseLen32 = 8;
phonemacro 7:5b7f7ec9efe0 155 uint8_t data[5];
phonemacro 11:ec7998257ec2 156
phonemacro 7:5b7f7ec9efe0 157 //● Enable SHA_DONE Interrupt
phonemacro 7:5b7f7ec9efe0 158 m.writeRegister(MAX8614X::MAX8614X_INT_ENABLE2_REG, MAX8614X::MAX8614X_IE_SHA_DONE_EN);
phonemacro 7:5b7f7ec9efe0 159
phonemacro 7:5b7f7ec9efe0 160 m.writeRegister(MAX8614X::MAX8614X_INT_ENABLE1_REG, 0); // Disable all other interrupts
phonemacro 7:5b7f7ec9efe0 161
phonemacro 7:5b7f7ec9efe0 162 //● Enable SHA_EN bit.
phonemacro 7:5b7f7ec9efe0 163 m.writeRegister(MAX8614X::MAX8614X_SHA_CFG_REG,MAX8614X::MAX8614X_SHACFG_SHA_EN);
phonemacro 7:5b7f7ec9efe0 164
phonemacro 7:5b7f7ec9efe0 165 //● Write 160-bit random challenge value to RAM using registers MEM_IDX and MEM_DATA.
phonemacro 7:5b7f7ec9efe0 166 // Enable Memory Write, Select Bank 0, address 0x00 to 0xFF
phonemacro 7:5b7f7ec9efe0 167 m.writeRegister(MAX8614X::MAX8614X_MEMORY_CONTROL_REG, MAX8614X::MAX8614X_MEMCNTRL_WR_EN_MASK | MAX8614X::MAX8614X_MEMCNTRL_BANK0_MASK);
phonemacro 7:5b7f7ec9efe0 168
phonemacro 7:5b7f7ec9efe0 169 printf("\r\n Raw Input Data\r\n\r\n");
phonemacro 7:5b7f7ec9efe0 170 for (i = 0; i < challengeLen; i++) {
phonemacro 10:0b940aff3bb8 171 if (!(i % 4))
phonemacro 10:0b940aff3bb8 172 printf("\r\n ");
phonemacro 10:0b940aff3bb8 173 printf("%02x", challenge[i]);
phonemacro 7:5b7f7ec9efe0 174 }
phonemacro 7:5b7f7ec9efe0 175 printf("\r\n");
phonemacro 10:0b940aff3bb8 176 #if 0
phonemacro 7:5b7f7ec9efe0 177 k = 0;
phonemacro 10:0b940aff3bb8 178 for (i = 0; i < (challengeLen/4); i++) {
phonemacro 10:0b940aff3bb8 179 for (j = 3; j >= 0; j--) {
phonemacro 10:0b940aff3bb8 180
phonemacro 10:0b940aff3bb8 181 inData[j+(i*4)] = challenge[k];
phonemacro 10:0b940aff3bb8 182 k++;
phonemacro 7:5b7f7ec9efe0 183 }
phonemacro 10:0b940aff3bb8 184 }
phonemacro 10:0b940aff3bb8 185 #endif
phonemacro 10:0b940aff3bb8 186
phonemacro 10:0b940aff3bb8 187 transformData(challenge, xData, challengeLen);
phonemacro 7:5b7f7ec9efe0 188
phonemacro 7:5b7f7ec9efe0 189 printf("\r\n Transformed Input Data\r\n\r\n");
phonemacro 10:0b940aff3bb8 190 for (i = 0; i < challengeLen; i++) {
phonemacro 7:5b7f7ec9efe0 191 if (!(i % 4))
phonemacro 7:5b7f7ec9efe0 192 printf("\r\n ");
phonemacro 7:5b7f7ec9efe0 193 printf("%02x", xData[i]);
phonemacro 7:5b7f7ec9efe0 194 }
phonemacro 7:5b7f7ec9efe0 195 printf("\r\n ");
phonemacro 7:5b7f7ec9efe0 196 printf("\r\n ");
phonemacro 7:5b7f7ec9efe0 197
phonemacro 10:0b940aff3bb8 198 for (i = 0; i < (challengeLen); i++) {
phonemacro 7:5b7f7ec9efe0 199 m.writeRegister(MAX8614X::MAX8614X_MEMORY_INDEX_REG, i);
phonemacro 7:5b7f7ec9efe0 200 m.writeRegister(MAX8614X::MAX8614X_MEMORY_DATA_REG, xData[i]);
phonemacro 10:0b940aff3bb8 201 //}
phonemacro 10:0b940aff3bb8 202 }
phonemacro 7:5b7f7ec9efe0 203 printf("%\r\n");
phonemacro 7:5b7f7ec9efe0 204 // The message block consists of a 160-bit secret, a 160-bit challenge and 192 bits of constant data. Optionally, the 64-bit
phonemacro 7:5b7f7ec9efe0 205 // ROM ID replaces 64 of the 192 bits of constant data used in the hash operation. 16 bits out of the 160-bit secret and 16
phonemacro 7:5b7f7ec9efe0 206 // bits of ROM ID are programmable–8 bits each in metal and 8 bits each in OTP bits
phonemacro 7:5b7f7ec9efe0 207 //● Write command, with ROM ID (0x35) or without ROM ID (0x36), to SHA_CMD register
phonemacro 7:5b7f7ec9efe0 208 m.writeRegister(MAX8614X::MAX8614X_SHA_CMD_REG,MAX8614X::MAX8614X_SHACMD_MAC_ROM_ID);
phonemacro 7:5b7f7ec9efe0 209 // m.writeRegister(MAX8614X::MAX8614X_SHA_CMD_REG,MAX8614X::MAX8614X_SHACMD_MAC_NO_ROM_ID);
phonemacro 7:5b7f7ec9efe0 210
phonemacro 7:5b7f7ec9efe0 211
phonemacro 10:0b940aff3bb8 212 m.readRegister(MAX8614X::MAX8614X_SHA_CMD_REG, data, 1);
phonemacro 10:0b940aff3bb8 213 printf("sha cmd reg should be 0x35 mac rom id, reg %02X = %02X\r\n", MAX8614X::MAX8614X_SHA_CMD_REG, data[0]);
phonemacro 10:0b940aff3bb8 214 m.readRegister(MAX8614X::MAX8614X_INT_STATUS2_REG, data, 1);
phonemacro 10:0b940aff3bb8 215 printf("int status2, reg %02X = %X\r\n", MAX8614X::MAX8614X_INT_STATUS2_REG, data[0]);
phonemacro 7:5b7f7ec9efe0 216 //● Write 1 to SHA_START and 1 to SHA_EN bit.
phonemacro 7:5b7f7ec9efe0 217 m.writeRegister(MAX8614X::MAX8614X_SHA_CFG_REG,MAX8614X::MAX8614X_SHACFG_SHA_EN | MAX8614X::MAX8614X_SHACFG_SHA_START);
phonemacro 10:0b940aff3bb8 218 m.readRegister(MAX8614X::MAX8614X_SHA_CFG_REG, data, 1);
phonemacro 10:0b940aff3bb8 219 printf("sha CFG reg should be 0x3, reg %02X = %02X\r\n", MAX8614X::MAX8614X_SHA_CFG_REG, data[0]);
phonemacro 7:5b7f7ec9efe0 220
phonemacro 10:0b940aff3bb8 221 //● Wait for SHA_DONE interrupt.
phonemacro 10:0b940aff3bb8 222 m.clearShaComplete();
phonemacro 7:5b7f7ec9efe0 223 data[0] = 0;
phonemacro 10:0b940aff3bb8 224 // while(!m.isShaComplete()) {
phonemacro 10:0b940aff3bb8 225 while(!m.isShaComplete() && !data[0] ) {
phonemacro 7:5b7f7ec9efe0 226 m.readRegister(MAX8614X::MAX8614X_INT_STATUS2_REG, data, 1);
phonemacro 10:0b940aff3bb8 227 printf("int status2, reg %02X = %X\r\n", MAX8614X::MAX8614X_INT_STATUS2_REG, data[0]);
phonemacro 10:0b940aff3bb8 228
phonemacro 7:5b7f7ec9efe0 229 }
phonemacro 7:5b7f7ec9efe0 230 // ● Read 256 MAC value from RAM using registers MEM_IDX and MEM_DATA.
phonemacro 10:0b940aff3bb8 231 printf("\r\n Raw Output\r\n\r\n");
phonemacro 7:5b7f7ec9efe0 232 for (i = 64; i < 64+32; i++) {
phonemacro 7:5b7f7ec9efe0 233 if (!(i % 4))
phonemacro 7:5b7f7ec9efe0 234 printf("\r\n ");
phonemacro 7:5b7f7ec9efe0 235 m.writeRegister(MAX8614X::MAX8614X_MEMORY_INDEX_REG, i);
phonemacro 7:5b7f7ec9efe0 236 m.readRegister(MAX8614X::MAX8614X_MEMORY_DATA_REG, data, 1);
phonemacro 10:0b940aff3bb8 237 xData[i-64] = data[0];
phonemacro 7:5b7f7ec9efe0 238 printf("%02x", data[0]);
phonemacro 7:5b7f7ec9efe0 239 }
phonemacro 10:0b940aff3bb8 240 printf("%\r\n");
phonemacro 10:0b940aff3bb8 241
phonemacro 10:0b940aff3bb8 242 transformData(xData,macData, 32);
phonemacro 10:0b940aff3bb8 243 #if 0
phonemacro 10:0b940aff3bb8 244 printf("\r\n Formatted Response\r\n\r\n");
phonemacro 10:0b940aff3bb8 245 for (i = 0; i < 32; i++) {
phonemacro 10:0b940aff3bb8 246 if (!(i % 4))
phonemacro 10:0b940aff3bb8 247 printf("\r\n ");
phonemacro 10:0b940aff3bb8 248 printf("%02x", macData[i]);
phonemacro 10:0b940aff3bb8 249 }
phonemacro 10:0b940aff3bb8 250 printf("\r\n\r\n");
phonemacro 10:0b940aff3bb8 251
phonemacro 10:0b940aff3bb8 252 #endif
phonemacro 10:0b940aff3bb8 253 // transform data to Little-Endian
phonemacro 10:0b940aff3bb8 254 k = 0;
phonemacro 10:0b940aff3bb8 255 for (i = 0; i < (responseLen32); i++) {
phonemacro 10:0b940aff3bb8 256 tmpData = challenge[i];
phonemacro 10:0b940aff3bb8 257 x32Data[i] = 0;
phonemacro 10:0b940aff3bb8 258 for (j = 3; j >= 0; j--) {
phonemacro 10:0b940aff3bb8 259 x32Data[i] = x32Data[i] << 8;
phonemacro 10:0b940aff3bb8 260 x32Data[i] |= macData[k] & 0xFF;
phonemacro 10:0b940aff3bb8 261 k++;
phonemacro 10:0b940aff3bb8 262 }
phonemacro 10:0b940aff3bb8 263
phonemacro 10:0b940aff3bb8 264 }
phonemacro 10:0b940aff3bb8 265
phonemacro 10:0b940aff3bb8 266 printf("\r\n Formatted Response\r\n\r\n");
phonemacro 10:0b940aff3bb8 267 for (i = 0; i < responseLen32; i++) {
phonemacro 10:0b940aff3bb8 268 printf(" %08X \r\n",x32Data[i]);
phonemacro 10:0b940aff3bb8 269 }
phonemacro 10:0b940aff3bb8 270
phonemacro 10:0b940aff3bb8 271
phonemacro 7:5b7f7ec9efe0 272 }