// A/D boards: CONTEC AD12-16(PCI), AD12-64(PCI)
// D/A boards: CONTEC DA12-16(PCI), CONTEC DA12-8(PCI), CONTEC DA12-4(PCI)

// IO base address for the boards:
#define ADC_BASE_ADDR 0xdf80
#define DAC_BASE_ADDR 0xdf40

// IO base address can be obtained from /proc/pci which includes the lines like bellow:
//  Bus  1, device   9, function  0:
//    Multimedia controller: PCI device 1221:8183 (Contec Co., Ltd) (rev 0).
//      IRQ 14.
//      I/O at 0xdf40 [0xdf5f].
//  Bus  1, device  10, function  0:
//    Multimedia controller: PCI device 1221:8153 (Contec Co., Ltd) (rev 0).
//      IRQ 9.
//      I/O at 0xdf80 [0xdf9f].
//
// NOTE: In the above examples, `1221', `8183', and `8153' mean CONTEC, DA12-4(PCI), and AD12-16(PCI) respectively.


//----------------------------------------------------------
// for A/D conversion     
//----------------------------------------------------------

// analog input method
#define SINGLE_END 0x00
#define DIFFERENTIAL 0x08

// channel mode
#define MULTI 0x04
#define SINGLE 0x00

// clock mode
#define EXTERNAL_CLOCK 0x02
#define INTERNAL_CLOCK 0x00

// stop mode
#define SOFTWARE_COMMAND 0x00
#define CLOCK 0x01

#define BUF_CLR   0x05
#define DRE       0x02

#define MULTI_CHANNEL_MODE

#define CH 2 // maximum channel number for conversion. If this is set to 5, then ch0, ch1, ch2, ch3, and ch4 are converted sequentially. For single channel mode, set 0.

#define SAMPLING_CLOCK 10000 /* nsec */


//----------------------------------------------------------
// for D/A conversion     
//----------------------------------------------------------

#define V_MAX 5.
#define V_MIN -5.
#define V_OFFSET ((V_MAX+V_MIN)/2.)


//----------------------------------------------------------
// prototype definition of relative functions
//----------------------------------------------------------
		
int init_adc(void);
void cleanup_adc(void);
int init_dac(void);
void cleanup_dac(void);
int ad_conv(double *);
int ad_conv_raw(int *);
int da_conv(double, unsigned char);
int da_conv_pic(double, unsigned char);