Typedefs
typedef uint8_t	PCPS_STATUS_PORT
	Type of the status register port. More...

#define	PCPS_ST_BUSY 0x01
	Bit masks used with PCPS_STATUS_PORT. More...

#define	PCPS_ST_IRQF 0x02
	the clock has generated an IRQ on the PC bus (ISA cards only) More...

#define	PCPS_ST_MOD 0x20
	the raw demodulated DCF77 signal More...

#define	PCPS_ST_SEC 0x40
	seconds have changed since last reading More...

#define	PCPS_ST_MIN 0x80
	minutes have changed since last reading More...

Detailed Description

The status port register on bus-level cards reflects some hardware signals (e.g. DCF-77 modulation), and flags used for communication with the card (e.g. the BUSY flag, PCPS_ST_BUSY).

Note: Must not be confused with PCPS_TIME_STATUS which returns the synchronization status and associated information

Macro Definition Documentation

◆ PCPS_ST_BUSY

#define PCPS_ST_BUSY 0x01

Bit masks used with PCPS_STATUS_PORT.

The flags PCPS_ST_SEC and PCPS_ST_MIN are cleared whenever the clock is read, so they are not very reliable in multitasking environments and thus should be considered as deprecated.

The PCPS_ST_IRQF flag was used with old ISA cards to check if the device has generated an IRQ. Some PCI cards also support this, but in case of PCI cards the associated flag of the PCI interface chip should be checked to see if a particular card has generated an IRQ on the PC bus.

The macro _pcps_ddev_has_gen_irq cares about this and should be used to determine in a portable way whether a card has generated an IRQ.

the clock is busy filling the output FIFO

Definition at line 452 of file pcpsdefs.h.

◆ PCPS_ST_IRQF

#define PCPS_ST_IRQF 0x02

the clock has generated an IRQ on the PC bus (ISA cards only)

Definition at line 453 of file pcpsdefs.h.

◆ PCPS_ST_MIN

#define PCPS_ST_MIN 0x80

minutes have changed since last reading

Definition at line 456 of file pcpsdefs.h.

◆ PCPS_ST_MOD

#define PCPS_ST_MOD 0x20

the raw demodulated DCF77 signal

Definition at line 454 of file pcpsdefs.h.

Referenced by show_modulation().

◆ PCPS_ST_SEC

#define PCPS_ST_SEC 0x40

seconds have changed since last reading

Definition at line 455 of file pcpsdefs.h.

Typedef Documentation

◆ PCPS_STATUS_PORT

typedef uint8_t PCPS_STATUS_PORT

Type of the status register port.

see PCPS_STATUS_PORT_BIT_MASKS

Definition at line 431 of file pcpsdefs.h.

Typedefs