Freescale Semiconductor CMB2103, User Manual

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MMCCMB2103UM/D
User’s Manual
31
Debugging Embedded Code
3.1.2 Picobug Sample Session
1. This sample session begins with the Picobug prompt:
2. To see the contents of all registers, enter the Register Display (rd) command without any
name value:
The system responds with a display such as this:
3. To see the contents of a specific register, such as the epc register, enter the Register Display
(rd) command with the name value:
The system responds with a display such as this:
reset
Reset:
Resets the CPU and peripherals.
rd [name]
Register Display:
•
With optional name value, displays the value of that CPU register.
•
Without any name value, displays the values of all CPU registers.
rm name value
Register Modify:
Assigns the value parameter value to the name CPU register.
t
Trace (Step):
Single steps one instruction; identical to the
s
command.
s
Step (Trace):
Single steps one instruction; identical to the
t
command.
?
Help
Displays available commands, identical to the
he
command.
picobug>
picobug> rd
pc 32313033 epc 8000401c fpc 00000000
psr 80000000 epsr 80000000 fpsr 00000000
ss0-ss4 bad0beef 80010000 00000000 00000000 00000000 vbr 80805c00
r0-r7 bad0beef 00000000 80010000 00efff34 000000ff d4037308 74099403 73097409
r8-r15 80800024 80010040 0000000f 80707003 0000002d 00000012 0000002d 800000b4
picobug> rd epc
epc: 8000401c
Table 3-1 Picobug Commands (Continued)
Command Explanation
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
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