AD7490.h

00001 //
00002 //  AD7490 ... Analog Devices 16 channels, 1MSPS, 12bit ADC
00003 //
00004 //  2012.08.29 ... Originaly written by Yoji KURODA
00005 //
00006 #ifndef _AD7490_H
00007 #define _AD7490_H
00008 
00009 class AD7490 {
00010   protected:
00011     enum CREG {
00012         CREG_WRITE  = 0x800,
00013         CREG_SEQ    = 0x400,
00014         CREG_ADD3   = 0x200,
00015         CREG_ADD2   = 0x100,
00016         CREG_ADD1   = 0x080,
00017         CREG_ADD0   = 0x040,
00018         CREG_PM1    = 0x020,
00019         CREG_PM0    = 0x010,
00020         CREG_SHADOW = 0x008,
00021         CREG_WEAK   = 0x004,
00022         CREG_RANGE  = 0x002,
00023         CREG_CODING = 0x001
00024     };
00025     
00026     SPI spi;
00027     DigitalOut cs;
00028 
00029     unsigned short read(void);  // dummy read for triggering at sequential mode
00030     
00031   public:
00032     AD7490(SPI _spi, PinName _cs);
00033     virtual ~AD7490(){};
00034 
00035     unsigned short convert(int ch=0);       // one shot conversion at channel [ch]
00036     void convert(short data[]);             // convert all (16) channels with one short conv.
00037 
00038     unsigned short sequential(int ch=15);   // start sequential mode from channel [0] to [ch]
00039     void read(short data[]);                // read [0] to [ch], and copy to user area
00040 };
00041 
00042 #endif  // _AD7490_H