On Sat, Jul 16, 2011 at 13:32, Andreas Pretzsch wrote:
The sspi command writes the given data out on SPI and prints the data it reads to the console. For write-only slaves (i.e. a SPI-connected latch used as output expander), this is pointless and clutters the console. When called as "sspi.w", this output is omitted.
The flag is optional and backwards compatible, previous sspi revisions would simply ignore the flag (checked back to 2011.03).
i think the flag is misleading. "sspi.w" makes it sound like it'd call the SPI layer with a NULL read buffer and not simply omit the output. what you describe is more like a "quiet" flag.
along these lines, doesnt the general shell provide basic output redirection to support "silencing" all commands rather than having to add a "quiet" flag to them all ? then your script could simply do "sspi ... >/dev/null" (or however u-boot does it). -mike