Diff: mlx90614.cpp

Revision:

5:3c4431224932

Parent:

2:01d333d06727

Child:

6:689f0dab386c

--- a/mlx90614.cpp	Thu Jun 09 13:50:26 2011 +0000
+++ b/mlx90614.cpp	Mon May 11 17:28:37 2020 +0000
@@ -45,4 +45,136 @@
     *temp_val=temp_thermo-273;                          //Convert kelvin to degree Celsius
     
     return true;                            //load data successfully, return true 
-}
\ No newline at end of file
+}
+
+float MLX90614::GetEmissivity(void) {
+    char p1,p2,p3;
+    float temp_thermo;
+    bool ch;
+
+    i2c_thermo.stop();                            //stop i2c if not ack
+    wait(0.01);
+    i2c_thermo.start();                           //start I2C                   
+    ch=i2c_thermo.write(MLX96014_ADDRESS);              //device address with write condition
+    
+    if(!ch)return -90.0f;                    //No Ack, return False
+    
+    ch=i2c_thermo.write(0x24);                    //device ram address where Tobj value is present
+
+    if(!ch)return -91.0f;                    //No Ack, return False
+
+
+    i2c_thermo.start();                           //repeat start
+    ch=i2c_thermo.write(MLX96014_ADDRESS|0x01);         //device address with read condition 
+    if(!ch)return -92.0f;                    //No Ack, return False
+
+    p1=i2c_thermo.read(1);     //Tobj low byte
+    p2=i2c_thermo.read(1);     //Tobj heigh byte
+    p3=i2c_thermo.read(0);     //PEC
+    
+    i2c_thermo.stop();                            //stop condition
+    semaDHT.acquire();
+    debug("p2: %02X, p1: %02X\r\n",p2,p1);
+    semaDHT.release();
+
+    //temp_thermo=((((p2&0x007f)<<8)+p1)*0.02)-0.01;      //degree centigrate conversion
+    //*temp_val=temp_thermo-273;                          //Convert kelvin to degree Celsius
+    
+    return (((p2<<8) + p1)/65535.0f);                            //load data successfully, return true 
+}
+
+int MLX90614::BlankEEPROM(int em) {
+    uint8_t p1[5];
+    float temp_thermo;
+    bool ch;
+
+//CRC for this config is 0x3B
+    p1[0]=MLX96014_ADDRESS;
+    p1[1]=0x24;
+    p1[2]=0x00;
+    p1[3]=0x00;
+
+    // uint8_t crc = crc8(p1, 4);
+    // debug("CRC: 0x%02X\r\n",crc);
+
+    i2c_thermo.stop();                            //stop i2c if not ack
+    wait(0.01);
+    i2c_thermo.start();                           //start I2C                   
+    ch=i2c_thermo.write(p1[0]);              //device address with write condition    
+    if(!ch)return -1;                    //No Ack, return False    
+
+    ch=i2c_thermo.write(p1[1]);                    //device ram address where Tobj value is present
+    if(!ch)return -2;                    //No Ack, return False
+    
+    ch = i2c_thermo.write(p1[3]);     //Tobj low byte
+    if (!ch) return -3;
+
+    ch = i2c_thermo.write(p1[2]);     //Tobj heigh byte
+    if (!ch) return -4;
+    
+
+
+    ch = i2c_thermo.write(em);
+    if (!ch) return -5;
+    
+    i2c_thermo.stop();                            //stop condition
+     
+    debug("Em: %1.3f\r\n",MLX90617_GetEmissivity());
+
+    return 0;
+}
+
+int MLX90614::SetEmissivity(float em, uint8_t lclCrc) {
+    uint8_t p1[5];
+    float temp_thermo;
+    bool ch;
+    uint16_t number;
+    //uint8_t *num[2];
+
+    temp_thermo = 65535.0f * em;
+    number=temp_thermo;
+    uint8_t num[2];
+
+    num[0] = number & 0xFF;
+    num[1] = number >> 8; 
+
+    //debug("F: %1.3f, INt: %d, H:%02X, L: %02X\r\n",temp_thermo,number,num[1],num[0]);
+// //CRC for this config is 0x3B
+//     p1[0]=thermometer.i2caddress;
+//     p1[1]=0x24;
+//     p1[2]=0x19;
+//     p1[3]=0x99;
+
+//CRC for this config is 0x05
+    p1[0]=MLX96014_ADDRESS;
+    p1[1]=0x24;
+    p1[2]=num[0];
+    p1[3]=num[1];
+
+    // uint8_t crc = crc8(p1, 4);
+    // debug("CRC: 0x%02X\r\n",crc);
+
+    i2c_thermo.stop();                            //stop i2c if not ack
+    wait(0.01);
+    i2c_thermo.start();                           //start I2C                   
+    ch=i2c_thermo.write(p1[0]);              //device address with write condition    
+    if(!ch)return -1;                    //No Ack, return False    
+
+    ch=i2c_thermo.write(p1[1]);                    //device ram address where Tobj value is present
+    if(!ch)return -2;                    //No Ack, return False
+    
+    ch = i2c_thermo.write(p1[2]);     //Tobj low byte
+    if (!ch) return -3;
+
+    ch = i2c_thermo.write(p1[3]);     //Tobj heigh byte
+    if (!ch) return -4;
+    
+    ch = i2c_thermo.write(lclCrc);
+    if (!ch) return -5;
+    
+    i2c_thermo.stop();                            //stop condition
+     
+    debug("Em: %1.3f\r\n",MLX90617_GetEmissivity());
+
+    return 0;
+}