Texas Instruments SWRU294, Руководство пользователя, Страница: 38 / 57

SWRU294
Page 38/40
12 Frequently Asked Questions
Q1 I have a SmartRF TrxEB that says revision 1.1 on the PCB, but rev. 1.1 is not
mentioned
in the User’s Guide. Why?
A1
Your SmartRF TrxEB is indeed what this user’s guide call revision 1.3.0. This user’s
guide refers to the assembly revision of the EB. On SmartRF TrxEB (assembly) revision
1.3.0, the PCB revision is 1.1. For EB revision 1.5.0, the PCB revision is synchronized
with the assembly revision, the PCB revision being 1.5.
Q2 How do I check the firmware revision on the evaluation board?
A2 You can use both SmartRF Studio and SmartRF Flash Programmer to check the
firmware revision. Connect the EB to a PC via USB and launch e.g. the SmartRF Flash
Programmer. Select the “EB application (USB)” tab. The SmartRF board should be listed
with relevant information about the firmware running on the board. In the below example,
the EB firmware revision is 0009.
Q3 Installation of USB drivers for the evaluation board fails. Help!
A3 Please refer to design note DN304 [2] on the TI web for help regarding installation of the
Cxxxx Development Tools USB driver (Cebal).
Q4 Nothing happens when I power up the evaluation board. Why?
A4 Make sure the power selection jumpers on header P17 are set according to your power
source (see section 6.3). Check that the Mode Selection switches (section 6.1) are not
set to disable the USB MCU. Also, make sure the board current jumpers (P10, P13 and
P15) are all short circuited.
Q5 When powering up the evaluation board, LED D6 starts blinking. Why?
A5 LED D6 (aka. USB LED) indicates the state of the TrxEB. If the observed behavior is
short blinks with long pauses (0.1 s ON, 0.9 s OFF), the EB firmware does not detect any
connected chip. If an EM is connected, the firmware does not support the connected EM.
Try updating the EB firmware using SmartRF Studio or SmartRF Flash Programmer (see
chapter 11).
If the blink frequency is about 1 Hz (0.5 s ON, 0.5 s OFF), the USB MCU bootloader has
entered a forced boot recovery mode (set during programming of the device). Power off
the system and turn it back on to start the application.
If the blinking is more rapid (10 times per second) the bootloader could not find a valid
application in flash. Use SmartRF Studio or SmartRF Flash Programmer to program a
new firmware on the board.
See section 6.9.2 for more details on LED D6 states.