5 Firmware update
5.1 Introduction
The L1 preamplifier includes multiple programmable circuits. This approach allows the unit to be updated to support new features.
It includes a host micro-controller, a display controller and a pair of DSPs for audio monitoring. All these components run firmwares
which can be updated when needed, for instance to support additional features or in the event of a bug. The following sections
describe how to update the complete firmware of your L1 preamplifier.
5.2 Firmware Update procedure
5.2.1 Preparing the firmware image
Before doing the actual firmware update, it is necessary to prepare the firmware update image. Firmware update images are
available in the form of compressed .zip files from our website at www.ch-precision.com.
The following procedure shows how to prepare the firmware image:
1. Start by downloading the latest L1 firmware image from www.ch-precision.com
2. Prepare a blank, FAT32 formatted USB 2.0 stick. Please note that some USB sticks are not properly detected by the USB
interface of the L1. CH Precision recommends the use of Sandisk USB flash drives.
3. Decompress the firmware image .zip file to the root of your USB stick
After doing so, your USB stick should contain the following files:
• L1_xxx.ds1: Firmware update file for L1 operating conditions monitoring DSPs
• L1_xxx.mc1: Firmware update file for L1 Micro-controller
• L1_xxx.ol1: Firmware update file for L1 Display controller
where 'xxx' indicate the software version number.
Make sure all three files are present at the root of your USB stick. Any missing file will make the firmware update procedure fail.
42 L1 User Manual Rev 1.0
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