Radarcape:BeagleboneBlack: Difference between revisions

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===Boot Requirements===
In order to make /dev/ttyO5 available, the internal HDMI must be disabled already in kernel command line. For this purpose, on the first (FAT formatted) partition, a file uEnv.txt needs to be present which contains
  optargs=quiet capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN
Disabling HDMI was the compromise decided that the application SW is equal on BB-white and BB-black.
Finally, the first partition contains
  root@bbb-setup1:~/mmc1# ls -l
  -rwxr-xr-x    1 root    root        99976 Jul  5  2014 MLO
  -rwxr-xr-x    1 root    root        379412 Jul  5  2014 u-boot.img
  -rwxr-xr-x    1 root    root            68 Jan  1 00:00 uEnv.txt
===Device Tree===

Latest revision as of 17:32, 6 December 2018

For Experts The tasks described in this manual require advanced experience with Unix/Linux.

Scope

Eventually, Radarcape will use a Beaglebone Black Rev. C in order to provide

  • more computing power (1GHz instead of 720MHz)
  • more memory: 512MB instead of 256MB
  • an internal 4GB eMMC card instead of an external SD card

The only disadvantage seen is that the Radarcape looses the native serial console that was accessible through the back side USB.

This page documents changes required for a Radarcape on a Beaglebone Black Rev. C. Please note that the Radarcape requires at least Revision 3.0 cape board, as some pins that are now used by the eMMC, had to be re-routed.

For fallback reasons, an external SD card still can be used. See below.

Changed Pin List

Function Beaglebone white Beaglebone Black
CONFD GPIO1_6 GPIO1_13
DCLK GPIO1_7 GPIO1_15
NSTAT GPIO1_2 GPIO1_14
DATA0 GPIO1_12 GPIO1_12
NCONF GPIO1_5 GPIO1_29
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