Configureing the DSP and EEPROM
There are two ways to download the firmware to the SigmaDSP. One is using USBi Cable or a compatible one. And the other way is accessing from Raspberry-pi I2C over TCP/IP port.
This is a standard way to configure the DSP and write the SPI-EEPROM. The necessary equipment is as follows...
- SIgmaStudio installed Windows running PC (64bit version)
- USBi or Conpatible Device(i.e. Free-USBi)
if you have trouble on installing the FreeUSBi driver, please try the 3E Audio version as follows link ...
3e-Audio version FreeUSBi Manual & Driver
http://www.3e-audio.com/wp-content/uploads/2018/12/FreeUSBi-Driver-Install-Guide_Rev1.1.pdf (Driver Install Guide)
http://www.3e-audio.com/wp-content/uploads/2018/12/FreeUSBi-Driver.rar （FreeUSBi Driver for Win7/Win10)
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Invoke the SigmaStudio.
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From the File menu, Open to load the SigmaStudio sample project or your own project.
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Turn on the FreeDSP OCTAVIA.
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Select the "Hardware Configuration" tab, and then Make sure the top "USB" Column of USB interface turns Green.
(If it turns red, you need to reinstall the driver/software for USBi or Compatible.
You need select I2C 0x70(112) and SPI 0x1 ADR0 from the pull-down menu, if not selected.
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Click the "Compile-Link-Download" button.
You may see some kind of error "Not Connected". (This action is just only for switching the USBi from SPI to I2C mode before connecting the hardware.) -
Connect the USBi or Compatible device to FreeDSP OCTAVIA's J12. Then click the "Compile-Link-Download" button again.
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Right Mouse button Click on the IC1 ADAU1452 balloon. Then select the "Self boot memory" > "Write Latest Compilation through DSP" pull-down menu.
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Then you will see the following pop-up window. You need to set the right parameters for the EEPROM that you are using.
for M95M01-DWMN4TP (256kbits)
for 25AA512 (512kbits)
for 25AA1024 (1mega bits)
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Click the "OK" button. Then the firmware will be written into EEPROM.
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Push the DSP-Reset button. The written firmware will be loaded from the EEPROM in a few seconds.
This software is written by elagil. The software package is a Python application, which can control FreeDSP OCTAVIA over the network.
- The backend service is the core application, which connects to the DSP via SPI or I2C,
- Exposes a TCP interface towards SigmaStudio (on the default port 8087)
- Provides a remote procedure call (RPC) interface, based on grpc.
- You don't need to buy expensive USBi anymore. With the latter, a frontend can connect to the backend service and control it remotely.