forte_en.pdf - 第101页
Page 101 programmer may be co nnected to t he con trol PC and its drivers must be correctly in stalled. T his is confirmed by the green ON-LINE LED being on. Fig.49: FORTE Tester After you start the tester, make sure t …
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10
TROUBLE-SHOOTING
This chapter describes how to proceed if experiencing
difficulties with device programming. It also describes
testing utilities for FORTE designed to check if the
programmer is in good condition or damaged. Please go
through all the tips and tricks before you send your
programmer to a service shop.
The testing utilities are not part of the UP software
installation, but they can be downloaded separately from
https://www.asix.tech/prg_testers_cz.html. They are
localized only in English.
10.1
Tips and Tricks
Should you experience difficulties with programming, we
recommend checking the following points:
• Check the microcontroller and programmer
connections according to the description in Connecting
to Application. Even though it may seem trivial, it is
recommended to check the connection twice and to
assume the second time that the link does not always
lead where you want it to or it leads to more than one
point.
• If a crystal or other auxiliary devices are used for
programming, (typically pull-down or pull-up resistors),
check if their values and connections are correct.
• It is advisable (and often necessary) to have blocking
capacitors at the power supply of the device to be
programmed.
• If the device to be programmed has more than one
power-supplying pin, all of them must be really fed. It
is often recommended to check their voltage with a
voltmeter.
• Use of the latest version of UP is recommended. If you
are still using an older version, an update is
recommended.
• Are you programming a new device or has it been
previously programmed? If so, the problems may be
caused by unsuitably set fuses in the device.
• The length of the ICSP cable should not exceed 15cm.
• Make sure that there is no additional capacity present
at the programming (data) pins. Consider if circuits on
the programming pins could cause too large a load for
programming.
• It is important that the crystal or the communication
speed settings reflect the reality in devices that need
that settings.
• Some devices may be programmed using several
different methods. Programming problems may be
caused by selecting a different programming interface
or a different programming mode than the ones that
the application is prepared for.
If none of the above tips help to eliminate the problem
and if it absolutely sure that the device to be
programmed is not faulty, the fault may lie in the
programmer.
To easily find out whether the programmer is in order or
not, you can use the testing utilities described in the
following chapters.
10.2
FORTE Tester
The FORTE Tester utility easily tests the “health
state” (usability) of the FORTE programmer right at the
customer's site.
In order to run it successfully, only one FORTE
Page 101
programmer may be connected to the control PC and its
drivers must be correctly installed. This is confirmed by
the green ON-LINE LED being on.
Fig.49: FORTE Tester
After you start the tester, make sure that the
programmer's output buffers are fed. You can either
switch on the VDD and set its voltage to the required
level or connect an external feeding voltage to the VDD
pin. The level of detected voltage is displayed in the lower
part of the window.
Basic communication with the programmer can easily be
recognized by the Active diode being on. You can choose
its color to be yellow or red.
Programmer's serial number is displayed in the top part of
the window. This number is necessary for any
communication with the service shop. You can also find
this number on the bar code label on the programmer
bottom.
Space for displaying possible error messages concerning
overcurrent or overvoltage detected is provided in the
window under the serial number.
The line below provides information on the GO button.
The programing voltage level on pin P can be verified by
switching the VPP option on and setting the required
voltage level. The detected voltage is displayed in the top
right corner of the window. The level of the current
detected on pin P is displayed immediately below the
voltage. As the P output features a built-in potential
divider of approximately 5kΩ, a non-zero value of the
current is displayed even with the output pin P
disconnected caused by feeding this potential divider.
If outputs are in a state of high impedance (Z),
information on input logical levels at these pins is
displayed. If a pull-up resistor is connected to a selected
pin, the system starts reading log. 1. If a pull-down
resistor is connected, log. 0 is read.
Outputs can be linked individually to log. 1 or log.0.
Output signal quality can be verified by a voltmeter.
The Generate waves option sends a periodical signal of
approximately 1 kHz simultaneously to all outputs.
Neither reading of inputs nor setting of outputs works if
there is no voltage at pin VDD.
If everything seems to be in order, but the device still fails
to get programmed, it is recommended to check the
application connection according to instructions for
connecting a microcontroller to the programmer.
If in doubt as to whether the programmer is in order or
faulty, do not hesitate to contact our technical support.
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11
HPRAVR
HPRAVR is an optional accessory for PRESTO and FORTE
programmers for programming AVR microcontrollers in
applications with the ISP10PIN standard connector on the
device's side and with the ICSPCAB8 cable on the
programmer's side. The ISP10PIN connector is typically
used on boards with microcontrollers of the AVR type
such as STK500, for example.
11.1
Usage
Connect the HPRAVR adapter to the application's
connector. Make sure that pin 1 of the HPRAVR adapter is
connected to pin 1 of the ISP10PIN connector in the
application (Pin1 is marked with a red dot at HPRAVR
while it may be marked in different ways on the
connected application – see information in the
corresponding manual).
Now interconnect the adapter and FORTE with an ICSP
cable. Pin2 in the cable is used as the key. The following
picture illustrates a typical interconnection of the PRESTO
programmer with an application through the HPRAVR
adapter:
Fig.50: Use of HPRAVR
Important Warning
Pin No.1 of the HPRAVR adapter is marked
with red color. Please double check the
position of the pin No.1 in the application as
the application could be damaged if
incorrectly connected.
Fig.51: ISP10PIN, top
view
Fig.52: HPRAVR adapter diagram