SPMCK16Z4MPV20 datasheet(478/500 Pages) FREESCALE

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INITIALIZATION AND PROGRAMMING EXAMPLES

M68HC16 Z SERIES

E-26

USER’S MANUAL

has overflowed ten times.

****************************************************************************

INCLUDE

'EQUATES.ASM'

;table of EQUates for common register

;addresses

INCLUDE

'ORG00000.ASM'

;initialize reset vector

INCLUDE

'ORG00008.ASM'

;initialize interrupt vectors

We are choosing User Defined Interrupt Vector 9 (interrupt vector 64

at address $0080) to be the base vector number (VBA) for the GPT

because the least significant nibble in the address must be a $0.

The VBA should be reflected in the GPT Interrupt Configuration

ORG

$0080

;Address for interrupt vector 64

DC.W

PAOV_ROUTINE

;Adjusted Priority Channel -- PAC

DC.W

IC1_ROUTINE

;Input Capture 1

DC.W

IC2_ROUTINE

;Input Capture 2

DC.W

IC3_ROUTINE

;Input Capture 3

DC.W

BDM

;Output Compare 1

DC.W

OC2_ROUTINE

;Output Compare 2

DC.W

BDM

;Output Compare 3

DC.W

BDM

;Output Compare 4

DC.W

BDM

;Input Capture 4 / Output Compare 5

DC.W

BDM

;Timer Overflow

DC.W

BDM

;Pulse Accumulator Overflow -- elevated

DC.W

BDM

;Pulse Accumulator Input

ORG

$0200

;start program after interrupt vectors

*****

Initialization Routines

*****

INCLUDE

'INITSYS.ASM'

;initially set EK=F, XK=0, YK=0, ZK=0

;set sys clock at 16.78 MHz, disable

COP

INCLUDE

'INITRAM.ASM'

;turn on 1k internal SRAM at $10000

;set stack in bank 1 (SK=1, SP=03FE)

INCLUDE

'INITSCI.ASM'

;set SCI baud rate at 9600

;enable SCI transmitter and receiver

Set up the interrupts

LDD

#$008E

;Give the GPT an IARB of $E

STD

GPTMCR

;so we can generate interrupts

LDD

#$A640

;elevate interrupt priority of PAOV,

STD

ICR

;set GPT IRQ level to 6,

;& assign vector 64 (User vector 9) of the

;interrupt/exception vector table as the

;GPT's Interrupt Vector Base Address

LDAB

#$17

;set OC2, IC1, IC2, IC3 to generate interrupts

STAB

TMSK1

LDAB

#$25

;set PAC Overflows to generate interrupts

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