CEquel Digital Systems Overview
Page 9 of 16
Programming the microcontroller (U1) and serial flash (U15) via USB
Connect the amplifier to a PC via USB.
Open up the CLoader Utility 2.10 or newer
If fw is older than 1.0.22.0 send .hex file. Otherwise, send .s file
How to Use the CLoader Utility
Instructions:
Simply run this utility with an amplifier connected to USB, it should show up in the dialog window.
If it does not, unplug the USB cable, cycle power on the amp, plug in the USB cable again and try
again.
If amplifier still does not show up, verify that the D+ USB data line is pulled high thru R19. With
the USB cable unplugged, use a meter to measure R19, it should be pulled up to +3.3V thru Q23.
Pulling this line high tells the USB host that the device is ready for communications.
After the amp shows up in the window, select "Load File" and select the firmware file to be
downloaded. Wait for amp to reboot and download successful display.
****** To run from a command line ******************************************
Simply type the name of the utility space and the name of the file to be loaded.
When run from a command line, it creates a file named "LdrError.txt". There is a number inside
this file as follows:
0 - Success
1 - Amplifier not found
2 - File invalid or not found
3 - USB communications error
4 - Abort Button pressed
The loader terminates upon encountering an error, or when successfully programming the
amplifier. The error file is blown away if found when the loader starts, and is written just before it
terminates.
It helps to have the utility and firmware file in the same directory and with no spaces in the folder
names. If there are spaces, use " " around the path name.
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