Tom Fleet / Mbed 2 deprecated XYZ_PROX_redux_01

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Dependencies:   NeoStrip_mod VCNL40x0_1 mbed

Fork of XYZ_PROX_01_1 by Ken Parish

main.cpp@2:9252c8c48272, 2014-05-30 (annotated)

Committer:
tomfleet
Date:
Fri May 30 12:50:31 2014 +0000
Revision:
2:9252c8c48272
Parent:
0:09dd83d78a0a 
compiles

;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ghostaudio 0:09dd83d78a0a 1 #include "mbed.h"
ghostaudio 0:09dd83d78a0a 2 #include "VCNL40x0.h"
ghostaudio 0:09dd83d78a0a 3 #include "NeoStrip.h"
tomfleet 2:9252c8c48272 4 #define NumPixels 4
tomfleet 2:9252c8c48272 5
tomfleet 2:9252c8c48272 6 #define PIN_OUTPUT 6
ghostaudio 0:09dd83d78a0a 7
ghostaudio 0:09dd83d78a0a 8 I2C i2c(p28, p27);
ghostaudio 0:09dd83d78a0a 9 DigitalOut mled0(LED1);
ghostaudio 0:09dd83d78a0a 10 DigitalOut mled1(LED2);
ghostaudio 0:09dd83d78a0a 11 DigitalOut mled2(LED3);
ghostaudio 0:09dd83d78a0a 12 DigitalOut mled3(LED4);
ghostaudio 0:09dd83d78a0a 13 Serial pc(USBTX, USBRX);
ghostaudio 0:09dd83d78a0a 14 DigitalOut reset(p29);
ghostaudio 0:09dd83d78a0a 15 NeoStrip strip(p26, NumPixels);
ghostaudio 0:09dd83d78a0a 16
ghostaudio 0:09dd83d78a0a 17 const uint8_t MUX = 0xE0; // 11100000
ghostaudio 0:09dd83d78a0a 18 const uint8_t VCNL4020 = 0x26;
ghostaudio 0:09dd83d78a0a 19 unsigned int sensors[4];
ghostaudio 0:09dd83d78a0a 20 char _send[3];
ghostaudio 0:09dd83d78a0a 21 char _receive[2];
ghostaudio 0:09dd83d78a0a 22 char port[2];
ghostaudio 0:09dd83d78a0a 23 const uint8_t chan[] = {0x01,0x02,0x04,0x08};
ghostaudio 0:09dd83d78a0a 24 int mleds[] = {0,0,0,0};
ghostaudio 0:09dd83d78a0a 25
ghostaudio 0:09dd83d78a0a 26 void Setup(void);
ghostaudio 0:09dd83d78a0a 27 void Setmleds(void);
ghostaudio 0:09dd83d78a0a 28 void SwitchChannel(uint8_t chan);
ghostaudio 0:09dd83d78a0a 29 void ReadAllSensors(void);
ghostaudio 0:09dd83d78a0a 30 void Setmleds(void);
ghostaudio 0:09dd83d78a0a 31 void SetProximityRate (unsigned char ProximityRate);
ghostaudio 0:09dd83d78a0a 32 void SetCommandRegister (unsigned char Command);
ghostaudio 0:09dd83d78a0a 33 void ReadCommandRegister (unsigned char *Command);
ghostaudio 0:09dd83d78a0a 34 void SetCurrent (unsigned char Current);
ghostaudio 0:09dd83d78a0a 35 void ReadProxiValue (unsigned int *ProxiValue);
ghostaudio 0:09dd83d78a0a 36 void SetProximityRate (unsigned char ProximityRate);
ghostaudio 0:09dd83d78a0a 37 void ReadProxiOnDemand (unsigned int *ProxiValue);
ghostaudio 0:09dd83d78a0a 38 void Setup(void);
ghostaudio 0:09dd83d78a0a 39
ghostaudio 0:09dd83d78a0a 40
ghostaudio 0:09dd83d78a0a 41 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
ghostaudio 0:09dd83d78a0a 42
ghostaudio 0:09dd83d78a0a 43 int main() {
ghostaudio 0:09dd83d78a0a 44
ghostaudio 0:09dd83d78a0a 45 Setup();
ghostaudio 0:09dd83d78a0a 46
ghostaudio 0:09dd83d78a0a 47 while (1) {
ghostaudio 0:09dd83d78a0a 48
ghostaudio 0:09dd83d78a0a 49 ReadAllSensors();
ghostaudio 0:09dd83d78a0a 50
ghostaudio 0:09dd83d78a0a 51 }
ghostaudio 0:09dd83d78a0a 52 }
ghostaudio 0:09dd83d78a0a 53
ghostaudio 0:09dd83d78a0a 54
ghostaudio 0:09dd83d78a0a 55 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
ghostaudio 0:09dd83d78a0a 56
ghostaudio 0:09dd83d78a0a 57 void Setup(void) {
ghostaudio 0:09dd83d78a0a 58
ghostaudio 0:09dd83d78a0a 59 pc.baud(115200);
ghostaudio 0:09dd83d78a0a 60 // set BAUD
ghostaudio 0:09dd83d78a0a 61 for (int i = 0; i < 4; i++){
ghostaudio 0:09dd83d78a0a 62
ghostaudio 0:09dd83d78a0a 63 reset = 0;
ghostaudio 0:09dd83d78a0a 64 wait(0.001);
ghostaudio 0:09dd83d78a0a 65 reset = 1;
ghostaudio 0:09dd83d78a0a 66 wait(0.001);
ghostaudio 0:09dd83d78a0a 67 port[0] = chan[i];
ghostaudio 0:09dd83d78a0a 68 i2c.write(MUX,port, 1);
ghostaudio 0:09dd83d78a0a 69 SetCurrent(20); // Set current to 200mA
ghostaudio 0:09dd83d78a0a 70 SetCommandRegister (COMMAND_ALL_DISABLE); // ready for prox rate change
ghostaudio 0:09dd83d78a0a 71 SetProximityRate (PROX_MEASUREMENT_RATE_31); // 31 measurements/s
ghostaudio 0:09dd83d78a0a 72 wait(0.2);
ghostaudio 0:09dd83d78a0a 73
ghostaudio 0:09dd83d78a0a 74 }
ghostaudio 0:09dd83d78a0a 75 }
ghostaudio 0:09dd83d78a0a 76
ghostaudio 0:09dd83d78a0a 77 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
ghostaudio 0:09dd83d78a0a 78
ghostaudio 0:09dd83d78a0a 79 void Setmleds(void){
ghostaudio 0:09dd83d78a0a 80 mled0 = mleds[0];
ghostaudio 0:09dd83d78a0a 81 mled1 = mleds[1];
ghostaudio 0:09dd83d78a0a 82 mled2 = mleds[2];
ghostaudio 0:09dd83d78a0a 83 mled3 = mleds[3];
ghostaudio 0:09dd83d78a0a 84 }
ghostaudio 0:09dd83d78a0a 85
ghostaudio 0:09dd83d78a0a 86 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
ghostaudio 0:09dd83d78a0a 87
ghostaudio 0:09dd83d78a0a 88 void SwitchChannel(uint8_t chan){
ghostaudio 0:09dd83d78a0a 89 reset = 0;
ghostaudio 0:09dd83d78a0a 90 wait(0.001);
ghostaudio 0:09dd83d78a0a 91 reset = 1;
ghostaudio 0:09dd83d78a0a 92 wait(0.001);
ghostaudio 0:09dd83d78a0a 93 port[0] = chan;
ghostaudio 0:09dd83d78a0a 94 i2c.write(MUX,port, 1);
ghostaudio 0:09dd83d78a0a 95 }
ghostaudio 0:09dd83d78a0a 96
ghostaudio 0:09dd83d78a0a 97 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
ghostaudio 0:09dd83d78a0a 98
ghostaudio 0:09dd83d78a0a 99 void ReadAllSensors(void){
ghostaudio 0:09dd83d78a0a 100
ghostaudio 0:09dd83d78a0a 101 for (int i = 0; i < 4; i++){
ghostaudio 0:09dd83d78a0a 102
ghostaudio 0:09dd83d78a0a 103 SwitchChannel(chan[i]); // set channel
ghostaudio 0:09dd83d78a0a 104 mleds[i] = 1; // LED on
ghostaudio 0:09dd83d78a0a 105 Setmleds();
ghostaudio 0:09dd83d78a0a 106 ReadProxiOnDemand(&sensors[i]); // read prox value on demand
ghostaudio 0:09dd83d78a0a 107 mleds[i] = 0; // LED off
ghostaudio 0:09dd83d78a0a 108 Setmleds();
ghostaudio 0:09dd83d78a0a 109 }
ghostaudio 0:09dd83d78a0a 110
ghostaudio 0:09dd83d78a0a 111 for (int i = 0; i < 4; i++){
ghostaudio 0:09dd83d78a0a 112 pc.printf("\r %i ", sensors[i]);
ghostaudio 0:09dd83d78a0a 113 }
ghostaudio 0:09dd83d78a0a 114 pc.printf("\r \n ");};
tomfleet 2:9252c8c48272 115 //}
ghostaudio 0:09dd83d78a0a 116
ghostaudio 0:09dd83d78a0a 117 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
ghostaudio 0:09dd83d78a0a 118
ghostaudio 0:09dd83d78a0a 119 void SetCommandRegister (unsigned char Command) {
ghostaudio 0:09dd83d78a0a 120
ghostaudio 0:09dd83d78a0a 121 //unsigned char send[2];
ghostaudio 0:09dd83d78a0a 122
ghostaudio 0:09dd83d78a0a 123 _send[0] = REGISTER_COMMAND; // VCNL40x0 Configuration reister
ghostaudio 0:09dd83d78a0a 124 _send[1] = Command;
ghostaudio 0:09dd83d78a0a 125 i2c.write(VCNL4020,_send, 2); // Write 2 bytes on I2C
ghostaudio 0:09dd83d78a0a 126 }
ghostaudio 0:09dd83d78a0a 127
ghostaudio 0:09dd83d78a0a 128 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
ghostaudio 0:09dd83d78a0a 129
ghostaudio 0:09dd83d78a0a 130 void ReadCommandRegister (unsigned char *Command) {
ghostaudio 0:09dd83d78a0a 131
ghostaudio 0:09dd83d78a0a 132 //unsigned char send[2];
ghostaudio 0:09dd83d78a0a 133 //unsigned char receive[2];
ghostaudio 0:09dd83d78a0a 134
ghostaudio 0:09dd83d78a0a 135 _send[0] = REGISTER_COMMAND; // VCNL40x0 Configuration register
ghostaudio 0:09dd83d78a0a 136 i2c.write(VCNL4020,_send, 1); // Write 1 byte on I2C
ghostaudio 0:09dd83d78a0a 137 i2c.read(VCNL4020+1,_receive, 1); // Read 1 byte on I2C
ghostaudio 0:09dd83d78a0a 138
ghostaudio 0:09dd83d78a0a 139 *Command = (unsigned char)(_receive[0]);
ghostaudio 0:09dd83d78a0a 140 }
ghostaudio 0:09dd83d78a0a 141
ghostaudio 0:09dd83d78a0a 142 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
ghostaudio 0:09dd83d78a0a 143
ghostaudio 0:09dd83d78a0a 144 void SetCurrent (unsigned char Current) {
ghostaudio 0:09dd83d78a0a 145
ghostaudio 0:09dd83d78a0a 146 _send[0] = REGISTER_PROX_CURRENT; // VCNL40x0 IR LED Current register
ghostaudio 0:09dd83d78a0a 147 _send[1] = Current;
ghostaudio 0:09dd83d78a0a 148 i2c.write(VCNL4020,_send, 2); // Write 2 bytes on I2C
ghostaudio 0:09dd83d78a0a 149
ghostaudio 0:09dd83d78a0a 150 }
ghostaudio 0:09dd83d78a0a 151
ghostaudio 0:09dd83d78a0a 152 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
ghostaudio 0:09dd83d78a0a 153
ghostaudio 0:09dd83d78a0a 154 void ReadProxiValue (unsigned int *ProxiValue) {
ghostaudio 0:09dd83d78a0a 155
ghostaudio 0:09dd83d78a0a 156 _send[0] = REGISTER_PROX_VALUE; // VCNL40x0 Proximity Value register
ghostaudio 0:09dd83d78a0a 157 i2c.write(VCNL4020, _send, 1); // Write 1 byte on I2C
ghostaudio 0:09dd83d78a0a 158 i2c.read(VCNL4020+1, _receive, 2); // Read 2 bytes on I2C
ghostaudio 0:09dd83d78a0a 159 *ProxiValue = ((unsigned int)_receive[0] << 8 | (unsigned char)_receive[1]);
ghostaudio 0:09dd83d78a0a 160 }
ghostaudio 0:09dd83d78a0a 161
ghostaudio 0:09dd83d78a0a 162 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
ghostaudio 0:09dd83d78a0a 163
ghostaudio 0:09dd83d78a0a 164 void SetProximityRate (unsigned char ProximityRate) {
ghostaudio 0:09dd83d78a0a 165
ghostaudio 0:09dd83d78a0a 166 _send[0] = REGISTER_PROX_RATE; // VCNL40x0 Proximity rate register
ghostaudio 0:09dd83d78a0a 167 _send[1] = ProximityRate;
ghostaudio 0:09dd83d78a0a 168 i2c.write(VCNL4020,_send, 2); // Write 2 bytes on I2C
ghostaudio 0:09dd83d78a0a 169 }
ghostaudio 0:09dd83d78a0a 170
ghostaudio 0:09dd83d78a0a 171 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
ghostaudio 0:09dd83d78a0a 172
ghostaudio 0:09dd83d78a0a 173 void ReadProxiOnDemand (unsigned int *ProxiValue) {
ghostaudio 0:09dd83d78a0a 174
ghostaudio 0:09dd83d78a0a 175 unsigned char Command=0;
ghostaudio 0:09dd83d78a0a 176
ghostaudio 0:09dd83d78a0a 177 // enable prox value on demand
ghostaudio 0:09dd83d78a0a 178 SetCommandRegister (COMMAND_PROX_ENABLE | COMMAND_PROX_ON_DEMAND);
ghostaudio 0:09dd83d78a0a 179
ghostaudio 0:09dd83d78a0a 180 // wait on prox data ready bit
ghostaudio 0:09dd83d78a0a 181 do {
ghostaudio 0:09dd83d78a0a 182 ReadCommandRegister (&Command); // read command register
ghostaudio 0:09dd83d78a0a 183 } while (!(Command & COMMAND_MASK_PROX_DATA_READY));
ghostaudio 0:09dd83d78a0a 184
ghostaudio 0:09dd83d78a0a 185 ReadProxiValue (ProxiValue); // read prox value
ghostaudio 0:09dd83d78a0a 186
ghostaudio 0:09dd83d78a0a 187 SetCommandRegister (COMMAND_ALL_DISABLE); // stop prox value on demand
ghostaudio 0:09dd83d78a0a 188
ghostaudio 0:09dd83d78a0a 189 }