Bryan Edelman / Mbed 2 deprecated ADT7310

ADT7310 SPI Temperature Sensor

Dependencies:   mbed

main.cpp@0:9bc294b44806, 2010-03-04 (annotated)

Committer:
pillsburydoughboy
Date:
Thu Mar 04 04:57:26 2010 +0000
Revision:
0:9bc294b44806

        

        
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#include "mbed.h"





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SPI spi(p11, p12, p13); // mosi, miso, sclk





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DigitalOut temp_cs(p8); // chip select





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DigitalOut led1(LED1); //debug led





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Serial pc(USBTX, USBRX); // tx, rx





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int main() {





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    float temp = 0;





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    temp_cs = 1;





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    temp_cs = 0;





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    spi.format(8,3); //falling edge, clock idle high





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    spi.frequency(5000000);





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    spi.write(0x08); //write to config register





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    spi.write(0x10); //contin conversion mode





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    temp_cs = 1;





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    temp_cs = 0;





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    spi.write(0x54); //contin read mode





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    temp_cs = 1;





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    spi.format(16,3);





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    while (1) {





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        led1 = 0;





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        temp_cs = 0;





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        temp = spi.write(0x0000); //write 16 dummy bits to read 16 bits





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        temp_cs = 1;





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        if (temp<0)





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            temp = (temp -32768)/128; //negative temp calculation





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        else





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            temp = temp/128;//div by 128 16bit positive temp





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        led1 = 1;





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        pc.printf("Temperature = %1.6f \r", temp);  





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        wait(1);





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    }





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}