Raghavan Naresh Sarangapani / Mbed OS BLE_Mesh_Light_Sen

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Fork of Hexi_Blinky_Example by Hexiwear

main.cpp@20:7466373c9234, 2017-12-06 (annotated)

Committer:
roborags
Date:
Wed Dec 06 22:54:33 2017 +0000
Revision:
20:7466373c9234
Parent:
19:ffd78d964d9f 
BLE Mesh Light Sensor to FRDMK64F

Who changed what in which revision?

UserRevisionLine numberNew contents of line
roborags 14:02ddfa711646 1
dan 0:7dec7e9ac085 2 #include "mbed.h"
roborags 14:02ddfa711646 3 #include "math.h"
roborags 14:02ddfa711646 4 #include <string>
roborags 14:02ddfa711646 5
roborags 15:67a7cca7ae06 6 Serial FRDM_UART_Debug(USBTX,USBRX);
roborags 20:7466373c9234 7 Serial FRDM_Data_Tx(PTC17,PTC16);
roborags 15:67a7cca7ae06 8 I2C I2C_Bus(PTE25,PTE24);
roborags 15:67a7cca7ae06 9
roborags 18:293c2885af81 10
roborags 15:67a7cca7ae06 11 const int Light_I2C_Addr = 0x88;
roborags 20:7466373c9234 12 float Light_Out = 0;
roborags 14:02ddfa711646 13
roborags 14:02ddfa711646 14
roborags 14:02ddfa711646 15 int main()
roborags 14:02ddfa711646 16 {
roborags 14:02ddfa711646 17
roborags 15:67a7cca7ae06 18 FRDM_UART_Debug.baud(115200); // Baud rate used for communicating with Tera-term on PC
roborags 20:7466373c9234 19 FRDM_Data_Tx.baud(115200);
roborags 15:67a7cca7ae06 20
roborags 15:67a7cca7ae06 21 I2C_Bus.frequency(100000); // set required i2c frequency
roborags 15:67a7cca7ae06 22
roborags 14:02ddfa711646 23 while (1)
roborags 14:02ddfa711646 24 {
roborags 20:7466373c9234 25
roborags 20:7466373c9234 26 uint16_t Light = 0;
roborags 14:02ddfa711646 27
roborags 20:7466373c9234 28 char I2C_Cmd[3];
roborags 20:7466373c9234 29 int Temp_i_1 = 0;
roborags 20:7466373c9234 30 int Temp_i_2 = 0;
roborags 20:7466373c9234 31 int Temp_i_3 = 0;
roborags 20:7466373c9234 32 int loop_count = 0;
roborags 15:67a7cca7ae06 33
roborags 15:67a7cca7ae06 34 I2C_Cmd[0] = 0x01; //configuration register
roborags 15:67a7cca7ae06 35 I2C_Cmd[1]= 0xCC; //configuration data
roborags 15:67a7cca7ae06 36 I2C_Cmd[2]= 0x01; //configuration data
roborags 15:67a7cca7ae06 37
roborags 15:67a7cca7ae06 38 I2C_Bus.write(Light_I2C_Addr, I2C_Cmd, 3);
roborags 15:67a7cca7ae06 39
roborags 15:67a7cca7ae06 40 I2C_Cmd[0] = 0x00; // data register
roborags 15:67a7cca7ae06 41
roborags 15:67a7cca7ae06 42 I2C_Bus.write(Light_I2C_Addr, I2C_Cmd, 1);
roborags 15:67a7cca7ae06 43
roborags 14:02ddfa711646 44 wait_ms(100);
roborags 14:02ddfa711646 45
roborags 15:67a7cca7ae06 46 I2C_Bus.read(Light_I2C_Addr, I2C_Cmd, 2);
roborags 14:02ddfa711646 47
roborags 15:67a7cca7ae06 48 Temp_i_1= I2C_Cmd[0]>>4;
roborags 15:67a7cca7ae06 49 Temp_i_2= (I2C_Cmd[0]-(Temp_i_1<<4))*256+I2C_Cmd[1];
roborags 15:67a7cca7ae06 50
roborags 16:39e45e59677c 51 for(loop_count = 0,Temp_i_3 = 1 ; loop_count < Temp_i_1 ; Temp_i_3 = Temp_i_3 * 2,loop_count++);
roborags 15:67a7cca7ae06 52
roborags 15:67a7cca7ae06 53 Light_Out= (Temp_i_2 * Temp_i_3) / 100;
roborags 15:67a7cca7ae06 54
roborags 20:7466373c9234 55 Light = Light_Out;
roborags 18:293c2885af81 56
roborags 20:7466373c9234 57 FRDM_Data_Tx.printf("%d\n",Light);
roborags 20:7466373c9234 58 FRDM_UART_Debug.printf("Lux = %.2f\n\r", Light_Out);
roborags 18:293c2885af81 59
roborags 15:67a7cca7ae06 60 wait(5);
roborags 20:7466373c9234 61
roborags 15:67a7cca7ae06 62 }
roborags 20:7466373c9234 63 }