Project:HM55B: Difference between revisions
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→Combining all commands
Danielsikar (talk | contribs) |
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A delay is required between starting the measurement and shifting in the status flag: | A delay is required between starting the measurement and shifting in the status flag: | ||
\[/_\/_\/_\/_\][/-\/_\/_\/_\][/-\/-\/_\/_\&&&&&&!!!!!!!!!!!!!!!!!!!!!!!!!!] | \[/_\/_\/_\/_\][/-\/_\/_\/_\][/-\/-\/_\/_\&&&&&&&&!!!!!!!!!!!!!!!!!!!!!!!!!!] | ||
Note that &&&&&& works but &: | Note that &&&&&&&& works but &:8 does not, even though the nominal value in both cases is the same, presumably because BusPirate parser adds a huge delay. This means that we don't know how fast this module can be clocked, because each ! will be > 50ms apart. | ||
The minimum required delay was 6us, 7us and 8us in three modules tested so, in production, as per data sheet, it would be a question of starting a measurement and polling status flag till 0b1100 was received. | |||
The [http://dangerousprototypes.com/docs/SPI BusPirate wiki] suggests this will work (since we've determined that it still provides the 22 sample bits even if the reading is incomplete): | The [http://dangerousprototypes.com/docs/SPI BusPirate wiki] suggests this will work (since we've determined that it still provides the 22 sample bits even if the reading is incomplete): | ||
\[0b0000 &] | \[0b0000 &][0b1000 && ]&[& 0b1100 r:4] | ||
=== Exiting === | === Exiting === | ||
