- 您现在的位置：买卖IC网 > Sheet目录1193 > AC244005 (Microchip Technology)KIT MPLAB REAL ICE ISOLATOR
Operation
2.7.2
Debugging Details
for debugging.
FIGURE 2-14:
MPLAB ? REAL ICE? IN-CIRCUIT EMULATOR READY FOR
DEBUGGING
V DD
Internal
Debug
Registers
Target
must
be
Running
+5V
+12V
Internal Circuits
4.7 k Ω
4.7 k Ω
1
5
V PP /MCLR
PGC
Debug
Executive
Program
for Debug
Executive
to Function
Area
Reserved
for Debug
Executive
4
Hardware
Stack Shared
by Debug Exec
Area Used by
Debug Exec
PGD
Memory
File
Registers
Typically, in order to find out if an application program will run correctly, a breakpoint is
set early in the program code. When a breakpoint is set from the user interface of
MPLAB IDE, the address of the breakpoint is stored in the special internal debug
registers of the target device. Commands on PGC and PGD communicate directly to
these registers to set the breakpoint address.
Next, the Debugger>Run function or the Run icon (forward arrow) is usually pressed
from MPLAB IDE. The emulator will then tell the debug executive to run. The target will
start from the Reset vector and execute until the Program Counter reaches the
breakpoint address previously stored in the internal debug registers.
After the instruction at the breakpoint address is executed, the in-circuit debug
mechanism of the target device “fires” and transfers the device’s Program Counter to
the debug executive (much like an interrupt) and the user’s application is effectively
halted. The emulator communicates with the debug executive via PGC and PGD, gets
the breakpoint status information and sends it back to MPLAB IDE. MPLAB IDE then
sends a series of queries to the emulator to get information about the target device,
such as file register contents and the state of the CPU. These queries are ultimately
performed by the debug executive.
The debug executive runs just like an application in program memory. It uses some
locations on the stack for its temporary variables. If the device does not run, for
whatever reason, such as no oscillator, a faulty power supply connection, shorts on the
target board, etc., then the debug executive cannot communicate to the MPLAB REAL
ICE in-circuit emulator and MPLAB IDE will issue an error message.
Another way to get a breakpoint is to press the MPLAB IDE’s Halt button (the “pause”
symbol to the right of the Run arrow). This toggles the PGC and PGD lines so that the
in-circuit debug mechanism of the target device switches the Program Counter from the
user ’s code in program memory to the debug executive. Again, the target application
program is effectively halted, and MPLAB IDE uses the emulator communications with
the debug executive to interrogate the state of the target device.
? 2008 Microchip Technology Inc.
DS51616B-page 25
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
AC244006
KIT MPLAB REAL ICE TRACE
AC2626M6
PROBE TEMP 6" GENERAL PURP
AC300024
MOTOR STEPPER 2PHASE 8WIRE
AC300030
KIT ACOUSTIC ACCESSORY
ACM-16
CABLE MODULE FR3 16BIT 40-DIP
ACM-2X8
ACTIVE CABLE MODULE DUAL 8 BIT
ACM-8
CABLE MODULE FR3 8BIT 28/32-DIP
ACS9510EVB
EVALUATION BOARD FOR ACS9510
相关代理商/技术参数
AC244005-2
功能描述:处理器配件 MPLAB REAL ICE w/ Performace Pak RoHS:否 制造商:Olimex Ltd. 产品:Cable 用于:
AC244006
功能描述:仿真器/模拟器 MPLAB REAL ICE TRACE INTERFACE Brd KIT RoHS:否 制造商:Blackhawk 产品:System Trace Emulators 工具用于评估:C6000, C5000, C2000, OMAP, DAVINCI, SITARA, TMS470, TMS570, ARM 7/9, ARM Cortex A8/R4/M3 用于:XDS560v2
AC244007
制造商:Microchip Technology Inc 功能描述:MPLAB REAL ICE JTAG ADAPTER - Boxed Product (Development Kits) 制造商:Microchip Technology Inc 功能描述:ADAPTER MPLAB REAL ICE JTA 制造商:Microchip Technology Inc 功能描述:ADAPTER, MPLAB, REAL, ICE, JTAG 制造商:Microchip Technology Inc 功能描述:ADAPTER, MPLAB, REAL, ICE, JTAG; Accessory Type:JTAG adaptor Board; For Use With:Microchip PIC32MX devices; SVHC:No SVHC (19-Dec-2012) ;RoHS Compliant: Yes
AC244008
功能描述:处理器配件 MPLAB REAL ICE Power Monitor
RoHS:否 制造商:Olimex Ltd. 产品:Cable 用于:
AC244022
功能描述:插座和适配器 Procs Extnsn Pak for PIC24FJ128GA010-ICE RoHS:否 制造商:Silicon Labs 产品:Adapter 用于:EM35x
AC244022
制造商:Microchip Technology Inc 功能描述:Processor Extension Pak for PI
AC244023
功能描述:插座和适配器 PROCESSOR EXTNSN PAK FOR PIC18F1xK50 RoHS:否 制造商:Silicon Labs 产品:Adapter 用于:EM35x
AC244024
功能描述:插座和适配器 Processor Ext Pak for PIC18LF14K50 RoHS:否 制造商:Silicon Labs 产品:Adapter 用于:EM35x