/** Interface for DAC management.
 * Each dac driver must implement all functions defined in the structure
 * dac_interface.
 *
 * Currently, dac and adc are tuned to the same frequency.
 *
 * Sampled data must be formated by the driver to FLOATS.
 * All functions return 1 if ok, or <0 if error
 */

struct dac_interface {

	/* this name must match the name selected in platforms.con */
	const char *name;

	int (*readcfg) (char *filename, int *NsamplesIn, int *NsamplesOut);

	/** initialize dac. options may vary between dacs.
	 *
	 * Sampling is started during this function call.
	 *
	 * \timeSlot Returns the system time slot in microsec
	 * \rxBuffer reception buffer
	 * \txBuffer transmit buffer
	 * \sync function that must be called each dac interrupt to synchronize the local processor timer (time slot).
	 */
	int (*init) (int *timeSlot,
			float *rxBuffer, float *txBuffer,
			void (*sync)(void));

	/** close dac */
	void (*close) ();

};