Rick McConney / Mbed 2 deprecated AvnetATT_shape_hackathon

This program simply connects to a HTS221 I2C device to proximity sensor

Dependencies:   FXOS8700CQ mbed

Proximity.cpp@43:3979ea0a2df3, 2016-10-10 (annotated)

Committer:
elmkom
Date:
Mon Oct 10 16:29:34 2016 +0000
Revision:
43:3979ea0a2df3
Parent:
39:3bbb3dbb531b 
Flush modem buffer before send

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elmkom 38:532a0d929756 1 #include "mbed.h"
elmkom 38:532a0d929756 2 #include "Proximity.h"
elmkom 38:532a0d929756 3
elmkom 38:532a0d929756 4 I2C *proximityi2c;
elmkom 38:532a0d929756 5 short proximityData [NUM_PROXIMIY_SENSORS][3];
elmkom 38:532a0d929756 6 short lastProximityData [NUM_PROXIMIY_SENSORS][3];
elmkom 38:532a0d929756 7 char dataStr[NUM_PROXIMIY_SENSORS*32];
elmkom 38:532a0d929756 8
elmkom 38:532a0d929756 9 Proximity::Proximity(void)
elmkom 38:532a0d929756 10 {
elmkom 38:532a0d929756 11
elmkom 38:532a0d929756 12
elmkom 38:532a0d929756 13 }
elmkom 38:532a0d929756 14
elmkom 38:532a0d929756 15 void Proximity::init(void)
elmkom 38:532a0d929756 16 {
elmkom 38:532a0d929756 17 proximityi2c = new I2C(PTE25, PTE24);
elmkom 38:532a0d929756 18 proximityi2c->frequency(400000);
elmkom 38:532a0d929756 19 }
elmkom 38:532a0d929756 20
elmkom 38:532a0d929756 21 void Proximity::write_reg(char address,char reg, char cmd)
elmkom 38:532a0d929756 22 {
elmkom 38:532a0d929756 23 char txbuffer [2];
elmkom 38:532a0d929756 24 txbuffer[0] = reg;
elmkom 38:532a0d929756 25 txbuffer[1] = cmd;
elmkom 38:532a0d929756 26
elmkom 38:532a0d929756 27 proximityi2c->write(address<<1, txbuffer, 2,false );
elmkom 38:532a0d929756 28
elmkom 38:532a0d929756 29 }
elmkom 38:532a0d929756 30
elmkom 38:532a0d929756 31 void Proximity::write(char address, char cmd)
elmkom 38:532a0d929756 32 {
elmkom 38:532a0d929756 33 char txbuffer [1];
elmkom 38:532a0d929756 34 txbuffer[0] = cmd;
elmkom 38:532a0d929756 35
elmkom 38:532a0d929756 36 proximityi2c->write(address<<1, txbuffer, 1,false );
elmkom 38:532a0d929756 37
elmkom 38:532a0d929756 38 }
elmkom 38:532a0d929756 39
elmkom 38:532a0d929756 40 unsigned char Proximity::read_reg(char address,char reg)
elmkom 38:532a0d929756 41 {
elmkom 38:532a0d929756 42 char txbuffer [1];
elmkom 38:532a0d929756 43 char rxbuffer [1];
elmkom 38:532a0d929756 44 rxbuffer[0] = 0;
elmkom 38:532a0d929756 45 txbuffer[0] = reg;
elmkom 38:532a0d929756 46 proximityi2c->write(address<<1, txbuffer, 1,false );
elmkom 38:532a0d929756 47 proximityi2c->read(address<<1, rxbuffer, 1 );
elmkom 38:532a0d929756 48 return (unsigned char)rxbuffer[0];
elmkom 38:532a0d929756 49 }
elmkom 38:532a0d929756 50 void Proximity::off()
elmkom 38:532a0d929756 51 {
elmkom 38:532a0d929756 52 for(int sensor = 0;sensor<NUM_PROXIMIY_SENSORS;sensor++)
elmkom 38:532a0d929756 53 {
elmkom 38:532a0d929756 54 write(MUXADDRESS,1<<sensor);
elmkom 38:532a0d929756 55 write_reg(PROXIMITYADDRESS,0x41,0x00);
elmkom 38:532a0d929756 56 }
elmkom 38:532a0d929756 57 }
elmkom 38:532a0d929756 58
elmkom 38:532a0d929756 59 void Proximity::on()
elmkom 38:532a0d929756 60 {
elmkom 38:532a0d929756 61 for(int sensor = 0;sensor<NUM_PROXIMIY_SENSORS;sensor++)
elmkom 38:532a0d929756 62 {
elmkom 38:532a0d929756 63
elmkom 38:532a0d929756 64 lastProximityData[sensor][0] = 1000;
elmkom 38:532a0d929756 65 write(MUXADDRESS,1<<sensor);
elmkom 38:532a0d929756 66 write_reg(PROXIMITYADDRESS,0x41,Als400Ps400); // initiate ALS: and PS
elmkom 38:532a0d929756 67 write_reg(PROXIMITYADDRESS,0x42,GainAls64Ir64|C25ma); // set ALS_VIS=ALS_IR GAIN = 64 current 25ma
elmkom 38:532a0d929756 68 }
elmkom 38:532a0d929756 69 wait(0.5);
elmkom 38:532a0d929756 70 }
elmkom 38:532a0d929756 71
elmkom 38:532a0d929756 72 void Proximity::scan()
elmkom 38:532a0d929756 73 {
elmkom 38:532a0d929756 74 for(int sensor = 0;sensor<NUM_PROXIMIY_SENSORS;sensor++)
elmkom 38:532a0d929756 75 {
elmkom 38:532a0d929756 76 write(MUXADDRESS,1<<sensor);
elmkom 38:532a0d929756 77 //proximity_sensor_on(sensor);
elmkom 38:532a0d929756 78 unsigned char prox_lsb = read_reg(PROXIMITYADDRESS,0x44);
elmkom 38:532a0d929756 79 unsigned char prox_msb = read_reg(PROXIMITYADDRESS,0x45);
elmkom 38:532a0d929756 80 unsigned char ALS_lsb = read_reg(PROXIMITYADDRESS,0x46);
elmkom 38:532a0d929756 81 unsigned char ALS_msb = read_reg(PROXIMITYADDRESS,0x47);
elmkom 38:532a0d929756 82 unsigned char IR_lsb = read_reg(PROXIMITYADDRESS,0x48);
elmkom 38:532a0d929756 83 unsigned char IR_msb = read_reg(PROXIMITYADDRESS,0x49);
elmkom 38:532a0d929756 84
elmkom 38:532a0d929756 85 short proximity = prox_msb*256+prox_lsb;
elmkom 38:532a0d929756 86 short ALS = ALS_msb*256+ALS_lsb;
elmkom 38:532a0d929756 87 short IR = IR_msb*256+IR_lsb;
elmkom 38:532a0d929756 88 proximityData[sensor][0] = proximity;
elmkom 38:532a0d929756 89 proximityData[sensor][1] = ALS;
elmkom 38:532a0d929756 90 proximityData[sensor][2] = IR;
elmkom 38:532a0d929756 91 //proximity_sensor_off(sensor);
elmkom 38:532a0d929756 92 //pc.printf(GRN "Sensor %d = %d, %d, %d\n\r",sensor,proximity,ALS,IR);
elmkom 38:532a0d929756 93 }
elmkom 38:532a0d929756 94
elmkom 38:532a0d929756 95 }
elmkom 38:532a0d929756 96
elmkom 38:532a0d929756 97 bool Proximity::changed(short delta)
elmkom 38:532a0d929756 98 {
elmkom 38:532a0d929756 99 for(int sensor = 0;sensor<NUM_PROXIMIY_SENSORS;sensor++)
elmkom 38:532a0d929756 100 {
elmkom 38:532a0d929756 101 if(abs(proximityData[sensor][0] - lastProximityData[sensor][0]) > delta)
elmkom 38:532a0d929756 102 {
elmkom 38:532a0d929756 103 return true;
elmkom 38:532a0d929756 104 }
elmkom 38:532a0d929756 105 }
elmkom 38:532a0d929756 106
elmkom 38:532a0d929756 107 return false;
elmkom 38:532a0d929756 108 }
elmkom 38:532a0d929756 109
elmkom 38:532a0d929756 110 short Proximity::getProximity(int sensor)
elmkom 38:532a0d929756 111 {
elmkom 38:532a0d929756 112 return proximityData[sensor][0];
elmkom 38:532a0d929756 113 }
elmkom 38:532a0d929756 114 short Proximity::getAmbientLight(int sensor)
elmkom 38:532a0d929756 115 {
elmkom 38:532a0d929756 116 return proximityData[sensor][1];
elmkom 38:532a0d929756 117 }
elmkom 38:532a0d929756 118 short Proximity::getIR(int sensor)
elmkom 38:532a0d929756 119 {
elmkom 38:532a0d929756 120 return proximityData[sensor][2];
elmkom 38:532a0d929756 121 }
elmkom 38:532a0d929756 122
elmkom 38:532a0d929756 123 char* Proximity::getDataStr()
elmkom 38:532a0d929756 124 {
elmkom 38:532a0d929756 125 int i=0;
elmkom 38:532a0d929756 126 int index = 0;
elmkom 39:3bbb3dbb531b 127 index += sprintf(&dataStr[index],"[");
elmkom 38:532a0d929756 128 for (i=0; i<NUM_PROXIMIY_SENSORS; i++)
elmkom 38:532a0d929756 129 {
elmkom 38:532a0d929756 130 if(i<NUM_PROXIMIY_SENSORS-1)
elmkom 38:532a0d929756 131 index += snprintf(&dataStr[index], 128, "{\"s\":%d,\"p\":%d,\"l\":%d,\"r\":%d},", i,proximityData[i][0],proximityData[i][1],proximityData[i][2]);
elmkom 38:532a0d929756 132 else
elmkom 39:3bbb3dbb531b 133 index += snprintf(&dataStr[index], 128, "{\"s\":%d,\"p\":%d,\"l\":%d,\"r\":%d}]", i,proximityData[i][0],proximityData[i][1],proximityData[i][2]);
elmkom 38:532a0d929756 134 lastProximityData[i][0] = proximityData[i][0];
elmkom 38:532a0d929756 135 lastProximityData[i][1] = proximityData[i][1];
elmkom 38:532a0d929756 136 lastProximityData[i][2] = proximityData[i][2];
elmkom 38:532a0d929756 137 }
elmkom 38:532a0d929756 138 return dataStr;
elmkom 38:532a0d929756 139 }
elmkom 38:532a0d929756 140
elmkom 38:532a0d929756 141
elmkom 38:532a0d929756 142
elmkom 38:532a0d929756 143