I am really proud to communicate that today (Saturday, April 26th, 2008) around 15:17 local time I successfully made the first ISDN call.
At this point I did not try any call volume testing, nor ISDN to SIP. Simple demo IVR was sufficient enough to put a smile on my face
Let me tell you about a few cool features we added to the rev B BRI Appliance.
I will start with the I2C based GPIO extender which permits the control of multiple LED’s (8 bi-color in our case) over 2 wire serial I2C interface. 8 bi-color LEDs will provide details on the status of each and every B channel (8 channels in total). The BRI Appliance will use green to represent “available”, red to represent “in-use” and perhaps orange to represent “ringing”. In addition, the same LEDs will present u-boot’s POST results in a binary format.
You may ask how one would execute POST? Perhaps even what is POST?
Well, POST (“Power on self test”) will provide the user with details on vital components of the board.
We will test, CPU, SDRAM, I2C, ISDN chip, UART and Ethernet. All results will be reported to the terminal screen but will turn all the LED’s accordingly as well. Should any of the components fail the POST, the unit will report binary error code using red LEDs, so no need to connect the terminal anymore. By holding the reset button for 5-10 sec, the POST will be executed. The same reset button will also allow users to perform soft reset (6-10 secs) and hard reset (11+ secs). The soft reset functionality will reset uBoot’s environment variables to defaults, and will reset the IP address under Linux (and uBoot). The hard reset will restore our default uClinux image and all default configurations. The countdown will appear on the terminal screen and at the same time the power led will change it’s color to inform the user about how long the reset button has been pressed for.
U-Boot 1.1.6-svn (email@example.com) (Apr 27 2008 – 09:39:03)
CPU: ADSP BF537 Rev.: 0.2
Waiting for SW-Reset button to be released…….
When released now, POST tests will be started……
When released now, uBoot factory default values will be restored……
When released now, uClinux image will be restored to factore defaults…
SW-Reset Button released after 17602 milli-seconds!
Clock: VCO: 500 MHz, Core: 500 MHz, System: 125 MHz
SDRAM: 64 MB
NAND: 256 MiB
Resetting the BR4-Appliance to factory defaults!!!!
## Switch baudrate to 115200 bps and press ENTER …
More to come soon…