ads8320.cpp

00001 
00002 
00003 #include "ads8320.h"
00004 
00005 ads8320::ads8320(PinName mosi, PinName miso, PinName sclk, PinName cs)
00006     : m_spi(mosi, miso, sclk)
00007     , m_cs(cs) {
00008     m_cs=1;
00009     m_spi.frequency(1000000); // the fastest of the sensor
00010     m_spi.format(8, 0); // duda son dos palabras de 8 bits? 
00011    // wait(0.5);
00012     //------------------------------------------------
00013     // pc.printf("RESET\r\n");
00014     write_register(0x06,0x01);
00015   // wait(0.5);
00016 
00017     // pc.printf("Initialize High Resolution Constant Reading Mode\r\n");
00018     write_register(0x03,0x0A);
00019     //wait(0.5);
00020 }
00021 
00022 
00023  unsigned int ads8320::readTemperature() {  //was float
00024     unsigned int temp_in = read_register16(TEMP);
00025    // temp_in /= 20;
00026     unsigned int Ti = temp_in;  
00027     return Ti; //return temp_in;
00028 }
00029 
00030 void ads8320::write_register(char register_name, char register_value) {
00031     register_name <<= 2;
00032     register_name |= 0x02; //write command
00033     m_cs=0; //Select SPI device
00034     m_spi.write(register_name); //Send register location
00035     m_spi.write(register_value); //Send value to record into register
00036     m_cs=1;
00037 }
00038 
00039 unsigned int ads8320::read_register16(char register_name) {   
00040     register_name <<= 2;
00041     register_name &= 0xFC; //Read command
00042     m_cs=0; //Select SPI Device
00043     m_spi.write(register_name); //Write byte to device
00044     unsigned int in_byte1 = m_spi.write(0x00);     //(was zonder unsigned)
00045     unsigned int in_byte2 = m_spi.write(0x00);
00046     m_cs=1;
00047     //float in_word= (in_byte1<<=8) | (in_byte2); 
00048     unsigned int in_word= (in_byte1<<=8) | (in_byte2);  
00049     return(in_word);
00050 }