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SPRUII7 – June 2018
Copyright © 2018, Texas Instruments Incorporated
Appendix A
SPRUII7 – June 2018
A.1
Frequently Asked Questions
1. Can other programming and debug tools (such as an XDS200 debug probe) be used with the F28004x
LaunchPad?
The F28004x LaunchPad utilizes an on-board XDS110 debug probe in a 2-pin cJTAG
configuration. cJTAG only uses the TMS and TCK pins of the debug probe. TDI and TDO are
present on the BoosterPack connectors and can be connected to a debug probe through jumper
wires if necessary.
2. What versions of Code Composer Studio can be used to develop software for the F28004x
LaunchPad?
The on-board XDS110 debug probe is compatible with Code Composer Studio development
environment version 6.1.0 and later.
3. Why can't I connect to the LaunchPad in Code Composer Studio?
•
Are shunts present on J101 for TCK and TMS?
•
Is the XDS110 and the F280049C MCU powered? Is LED1 illuminated?
If JP1, JP2, and JP3 are disconnected, the power provided through the USB is isolated from
the rest of the board. Ensure that 3.3 V is supplied to any of the available connectors on the
target side of the isolation.
•
Is the micro-USB connected to the PCB and is the USB region receiving power? Is LED0
illuminated?
The USB region must be powered with the 5 V from the USB cable. LED0 will illuminate when
the 5V is stepped down to 3.3 V for the USB isolation chip to operate and pass the signals
across the isolation barrier.
•
Ensure that the target configuration is set up to use cJTAG in 2-pin advanced mode.
Open the Target Configuration file (.ccxml) in Code Composer Studio. Click on the Advanced
tab and select cJTAG (1149.7) 2-pin advanced modes from the drop-down labeled
JTAG/SWD/cJTAG Mode. Leave the Target Scan Format as OSCAN2 format.
4. Why is the serial connection not working?
•
Are shunts present on J101 for TXD and RXD?
•
Are you using the correct COM port?
Right click on My Computer and select Properties. Navigate to the Hardware tab in the dialog
box and open the device manager. Scroll to Ports (COM & LPT) and expand this entry. Is
XDS110 Class Application/User UART listed? If so, read the COM number to the right of the
entry; this is the COM number you should be using.
•
Are you using the correct baud rate?
Most, if not all, of the examples are configured for a baud rate of 115200 when the CPU is
running at 100 MHz. If you have changed the PLL settings or developed your own code you
may have to recalculate the baud rate for your specific application. For information on how to
do this, see the
TMS320F28004x Piccolo™ Microcontrollers Technical Reference Manual
