Freescale Semiconductor Microcontrollers Bedienungsanleitung PDF herunterladen (Seite 279)

100

101

HC08 Full Chip Simulation

Configuration Procedure

279

Microcontrollers Debugger Manual

db $02 ; Message 3 Length

db $55 ; Data Byte 1

db $AA ; Data Byte 2

M3Desc_End:

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

* Init_CAN - The CAN is placed into the soft reset state, *

* where the control and timing registers can be *

* set and the identifier and mask registers can be *

* configured. After this, the module is placed in *

* normal mode in order to synchronize with the CAN *

* bus. *

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

Init_CAN:

lda #$01

sta CMCR0 ; place MSCAN08 into soft reset state

lda #$01

sta CMCR1 ; CAN clock source = CGMOUT*2

lda #$01

sta CBTR0 ; set SJW=0, baud rate prescalar=div by 2

lda #$27

sta CBTR1 ; set TSEG1=7 (8Tq), TSEG2=2 (3Tq), one

; sample per bit

lda #{(CANAddress>21t) & $FF} ; set identifier acceptance

; register to CAN address

sta CIDAR0

lda #{(CANAddress & $38000)>15t}

ora #{(CANAddress & $1C0000)>13t}

ora #$18

sta CIDAR1

lda #{(CANAddress & $7F80)>7t}

sta CIDAR2

lda #{(CANAddress & $7F)<1t}

sta CIDAR3

lda #$00

sta CIDMR0 ; set identifier mask register to exact match

sta CIDMR1

sta CIDMR2

sta CIDMR3

lda #00

sta CIDAC ; set identifier acceptance for single

; 32-bit filter

ldhx #Msg1_Desc ; set up transmission message 1

lda 0,x ; get message address

lsla

sta CT0IDR0

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