DiscreteInput

Example:	.ORG 0x1000 DemoDI: LDI R24, ACSZ_DIn & 0xFF ; Point to the initial string: LDI R25, ACSZ_DIn >> 8 ; "Discrete Inputs:" and print it RCALL ALocal_Print LDI R26, B00100000 ; Select: B001#xxxx = PORTC; Bxxxx#000 = DO0 DemoDI_Loop: MOV R24, R26 ; Copy the saved Discrete Input selector CALL ADiscreteInput ; This is the function being tested CPI R24, 0 ; Set or clear the ZERO flag based on the R24 LDI R25, ACSZ_DOff >> 8 ; returned, then assuming that it was zero LDI R24, ACSZ_DOff & 0xFF ; set the pointer to the " OFF" string BREQ AGo ; Now check the ZERO flag, unchanged since LDI R24, ACSZ_DOn & 0xFF ; the CPI; when BREQ not taken, change R24 Go:RCALL ALocal_Print ; Call the routine to print selected string INC R26 ; Increment the saved Discrete Input selector CPI R26, B00100110 ; If it is still valid, and B000 to B101 in BRLO ADemoDI_Loop ; the 3 LSBits are those valid, loop back JMP APrintNewLine ; Output CR, LF and exit to the caller Local_Print: JMP APrintFLASHASCIIz ; Provides a single FAR Printing call CSZ_DIn: .STRING "Discrete Inputs:" CSZ_DOn: .STRING " ON" CSZ_DOff: .STRING " OFF" CSZ_DIO: .STRING "Discrete I/O:" .ORG 0x1050 ; Set second ORG to have a know address ADIW R26, 0 ; If there is a command line tail, skip past BRNE AOK ; the immediate exit RET OK:MOVW R24, R26 ; Set the command line tail pointer passed CALL AParseValue ; Get the first value after "0x1050" MOV R30, R22 ; Save DO selected; no need to check, really MOVW R24, R26 ; Reset the "next string" pointer LDI R22, '=' ; Parse a value after the first equal sign CALL AParseValueAfter ; The Low Order BYTE is returned in R24 MOV R24, R30 ; Restore the Discrete Output index saved ANDI R24, B00000111 ; Limit it to the PINs BITs ORI R24, B00100000 ; Combine in the PORTC specifier CALL ADiscreteOutput ; Request the Discrete Output be changed LDI R24, ACSZ_DIO & 0xFF ; Point to the second string's LSByte RJMP ADemoDI + 2 ; Jump to set the MSByte and print all DIOs
Test it:	m>@ 0x1000 Discrete Inputs: OFF OFF OFF OFF OFF ON m>@ 0x1050 3 = 1 Discrete I/O: OFF OFF OFF ON OFF ON m>@ 0x1050 2 = 99 Discrete I/O: OFF OFF ON ON OFF ON m>@ 0x1050 4 = 1 Discrete I/O: OFF OFF ON ON ON ON m>@ 0x1050 0 = -1 Discrete I/O: ON OFF ON ON ON ON m>O*=2 m>@ 0x1000 Discrete Inputs: OFF ON OFF OFF OFF OFF m>o* = 63 m>@ 0x1000 Discrete Inputs: ON ON ON ON ON ON m>@ 0x1050 0 = 0 Discrete I/O: OFF ON ON ON ON ON m>@ 0x1050 1 = 0 Discrete I/O: OFF OFF ON ON ON ON m>@ 0x1050 4 = 0 Discrete I/O: OFF OFF ON ON OFF ON m>@ 0x1050 6 = 0 Discrete I/O: OFF OFF ON ON OFF OFF m>@ 0x1050 5 = 0 Discrete I/O: OFF OFF ON ON OFF OFF m>@ 0x1050 3 = 0 Discrete I/O: OFF OFF ON OFF OFF OFF m>@ 0x1050 2 = 0 Discrete I/O: OFF OFF OFF OFF OFF OFF m>@ 0x1000 Discrete Inputs: OFF OFF OFF OFF OFF OFF m>
Notes:	The "PPPP0ppp" means that the high four (4) BITs select the PORT, where PORTB = B0001, PORTC = B0010, PORTD = B0011. The low three (3) BITs select the single PIN to be set or read. B000 selects DIO 0, B001 selects DIO 1, B010 selects DIO 2, etc.
	The PORT options above are for the 328P microcontroller. Other PORT options are valid for other processors. The last possible valid PORT is PORTL = B1010.
	The EEbWS2812_DefPandP also has this format bit also uses the BIT unused here to use the next byte (EEbWS2812_DefPins) as a bitmask for multiple Discrete Outputs.
Dropin:  (setup code)	; Setup for the DiscreteInput() call: ; Passed: R24 BYTE bPortandPin single PORT and Pin selected: PPPP0ppp format ; Returns: R24 BYTE bValue status if the single Discrete Input: 0 or 1 ; Alters: R24 and the FLAGs ; Setup for the DiscreteOutput() call: ; Passed: R24 BYTE bPortandPin single PORT and Pin selected: PPPP0ppp format ; R22 BYTE bValueToSet 0 turns the DO off, any other turns it ON ; Returns: R24 BYTE bStata status of ALL the Discrete I/O on that PORT ; Alters: R24 and the FLAGs
Also see:	The Discrete Output Update command and the ReadAtoDValue System Functions.