>Hi, >I am having a Motorola HC12DG128 EVB and SDI cable. Using MCUEz as PC >interface. >I want to use PORTH key wakeup interrupt. >I coded the following program segment and the linker parameter file listed >at the end of the message. > >When I executed the program and after giving a signal to the PortH, pin 0 it >gives an illegal break point error message and jumps to somewhere else. > >Please tell me how to configure the interrupts when we use the SDI cable and >MCUEz software. > >I have been trying this for few weeks without any success and please help as >soon as possible. > >Thank you in advance. > >Bandara Bandara, It is possible you are not holding the Port H interrupt pin, in the interrupt state long enough. The data sheets specify the minimum time an interrupt should be held on the Key-Wakeup pins, so an interrupt will be recognized and processed. In your case, it is also possible that the interrupt recognition is beginning inside the HC12, but before the interrupt source is being identified, the interrupt request is removed externally. In such cases, the HC12 will fetch the SWI (software interrupt) vector at FFF6, and will start execution at the specified address by this vector. External switch debouncing, may also lead to similar behavior. Doron Nohau Corporation HC12 In-Circuit Emulators www.nohau.com |
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Re: Programming Interrupts
Started by ●January 2, 2003
Reply by ●January 2, 20032003-01-02
Hi, I am having a Motorola HC12DG128 EVB and SDI cable. Using MCUEz as PC interface. I want to use PORTH key wakeup interrupt. I coded the following program segment and the linker parameter file listed at the end of the message. When I executed the program and after giving a signal to the PortH, pin 0 it gives an illegal break point error message and jumps to somewhere else. Please tell me how to configure the interrupts when we use the SDI cable and MCUEz software. I have been trying this for few weeks without any success and please help as soon as possible. Thank you in advance. Bandara ---- ---- XDEF KWisr , entry ConstData: SECTION PORTH: EQU $0029 ;Select port H as inturrept pin numbers 52,51,50,49 DDRH: EQU $002B ;Data Direction registor port H KWIEH: EQU $002D ;Key wakeup intrrupt enable reg port H KWIFH: EQU $002F ;Key wakeup intrrupt flag reg port H initStk: EQU $2E00 ;initialiation the stak KWHVEC: EQU $FFCE ;Vector keywakeup port H RSTVEC: EQU $FFEF ;vector reset KWHNUM: EQU 7 ;Number of Key Wakeup H SetVect: EQU $FE1A PUCR: EQU $000C ALLBITS: EQU %11111111 BIT_0: EQU %00000001 PORTBIT: EQU %01000000 ; datasec: SECTION codesec: SECTION entry: lds #initStk bclr DDRH,ALLBITS ;make bit inputs ldaa #BIT_0 staa KWIFH ;Clear pending flags bset PUCR,PORTBIT bclr KWIEH,ALLBITS bset KWIEH,BIT_0 cli ;unmask HC12 intrrupts Foreground: ;nop wai ;bra Foreground KWisr: ;here goes isr ldd #$45ac ;simple instruction i handle here ldd #$4555 rti Linker Parameter file: ---- ----------------------- LINK INTRR.abs NAMES INTRR.o END SEGMENTS MY_ROM1 = READ_ONLY 0x2000 TO 0x22FF; MY_RAM1 = READ_WRITE 0x2300 TO 0x24FF; MY_STK1 = READ_WRITE 0x2500 TO 0x2C00; END PLACEMENT datasec,.data INTO MY_RAM1; ConstData INTO MY_ROM1; codesec,.text INTO MY_ROM1; .stack INTO MY_STK1; END INIT entry VECTOR ADDRESS 0xF7CE KWisr VECTOR ADDRESS 0xFFFE entry |
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Reply by ●January 2, 20032003-01-02
Hello everybody, Can I Know How to access the data while in LoopBack Self test mode. I am using 12DP256pv, Motorolla Kit. Since in the Manual it is given that, During LoopBack Self Test mode, RXBG will not perform FIFO. Then how to access all the data that is send during transmission. Let me know how to configure for this problem Manju --------------------------------- |