Motorola M68CPU32BUG Manuel d'utilisateur télécharger pdf (Page 41)

DEBUG MONITOR COMMANDS

M68CPU32BUG/D REV 1 3-54

RD Register Display RD

EXAMPLES

CPU32Bug>rd<CR>

PC =00003000 SR =2700=TR:OFF_S_7_..... VBR =00000000

SFC =0=F0 DFC =0=F0 USP =0000F830 SSP* =00004000

D0 =00000000 D1 =00000000 D2 =00000000 D3 =00000000

D4 =00000000 D5 =00000000 D6 =00000000 D7 =00000000

A0 =00000000 A1 =00000000 A2 =00000000 A3 =00000000

A4 =00000000 A5 =00000000 A6 =00000000 A7 =00004000

00003000 424F DC.W $424F

CPU32Bug>

NOTES

An asterisk following a stack pointer name indicates an active

stack pointer. To facilitate reading the status register it includes a

mnemonic portion. These mnemonics are:

Trace Bits The trace bits (T0, T1) control the trace feature of the MCU and are

displayed by the mnemonic as shown in the following table. The user

should not modify these bits when executing user programs.

T1 T0 Mnemonic Description

0 0 TR:OFF Trace off

0 1 TR:CHG Trace on change of flow

1 0 TR:ALL Trace all states

1 1 TR:INV Invalid mode

S Bits The bit name (S) appears if the supervisor/user state bit is set, otherwise a

period (.) indicates it is cleared.

Interrupt Mask A number from 0 to 7 indicates the current processor priority level.

Condition Codes The bit name (X, N, Z, V, C) appears if the respective bit is set, otherwise

a period (.) indicates it is cleared.

DEBUG MONITOR COMMANDS

M68CPU32BUG/D REV 1 3-51

PF Port Format PF

3.24.4 New Port Assignment

PF supports a set of drivers for a number of different boards and ports. To assign one of these to

a previously unassigned port number, execute the command with that port number. A message is

then printed to indicate that the port is unassigned and a prompt issued to request the type of

serial communication device. Pressing RETURN at this point lists the currently supported boards

and ports. Once the name of the board is entered, the port name is requested at the prompt. After

the port name is entered, PF prompts the user through the port configuration process.

Once a valid port is specified, default parameters are supplied. The base address of this new port

is one of these default parameters. Before entering the interactive configuration mode, the user is

allowed to change the port base address. Press RETURN to retain the present base address.

If the configuration of the new port is not fixed, then the system enters the interactive

configuration mode. Refer to paragraph 3.20.2 regarding configuring assigned ports. If the new

port has a fixed configuration, then PF issues the ’’OK to proceed (Y/N)?’’ prompt.

The user must enter the letter ’’Y’’ at the ’’OK to proceed (Y/N)?’’ prompt before PF initializes the

hardware. Pressing BREAK any time prior to this step or responding with the letter ’’N’’ at the

prompt leaves the port unassigned. This is only true of ports not previously assigned.

EXAMPLE Assigning port 1.

CPU32Bug>PF 1<CR>

Logical unit $01 unassigned

Name of board?<CR>

Cause PF to list supported boards, ports.

Boards and ports supported:

BCC: SCI

MC68681: A, B

Name of board? mc68681<CR>

Note: Upper or lowercase accepted.

Name of port? a<CR>

Port base address = $FFFFE000?<CR>

Baud rate [110, 300, 600, 1200, 2400, 4800, 9600, 19200] = 9600? .<CR>

OK to proceed (Y/N)? n

Note: Aborted, no hardware!

CPU32Bug>

eescale S

emiconduct

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Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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Motorola M68CPU32BUG Manuel d'utilisateur Page 41

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