Fabric OS Reference Manual

174 Fabric OS Reference Manual
portRegTest
Bit write/read test of the ASIC SRAMs and registers.
Synopsis
portRegTest
Availability admin
Description Use this command to verify that SRAM and register data bits in each ASIC
can be independently written and read.
To verify the data bits, write a walking 1 pattern to each location – write a
pattern of
0x00000001
to register N, read, and compare to be sure that the
pattern is the same. Shift the pattern one bit to the left (to
0x00000002
),
and repeat the write, read, and compare cycle. Shift again and repeat until
the last writable bit in register N is reached (
0x80000000
for a 32-bit
register).
For example, use the following pattern to test a 6-bit register:
1. 0x0001
2. 0x0002
3. 0x0004
4. 0x0008
5. 0x0010
6. 0x0020
7. 0x0040
8. 0x0080
9. 0x0100
10.0x0200
11.0x0400
12.0x0800