Difference between revisions of "Project:HM55B"
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(Created page with '=== Using the BusPirate === BusPirate settings: * M (mode) * 8 (3-wire raw) * 4 (400KHz) * 2 (3.3V high) * W (turn on 5V output) Reset: \[/_\/_\/_\/_\&:10] Take sample \[/-\…') |
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| − | === | + | === Module === |
| + | |||
| + | $20-25 compass module for embedded systems. SMD will be cheaper. | ||
| + | |||
| + | [http://www.parallax.com/dl/docs/prod/compshop/HM55BModDocs.pdf Datasheet] | ||
| + | |||
| + | |||
| + | === Testing with the BusPirate === | ||
BusPirate settings: | BusPirate settings: | ||
| Line 11: | Line 18: | ||
\[/_\/_\/_\/_\&:10] | \[/_\/_\/_\/_\&:10] | ||
| − | Take sample | + | RAW3WIRE>\[/_\/_\/_\/_\&:10] |
| + | CLOCK, 0 | ||
| + | CS ENABLED | ||
| + | CLOCK, 1 | ||
| + | DATA OUTPUT, 0 | ||
| + | CLOCK, 0 | ||
| + | CLOCK, 1 | ||
| + | DATA OUTPUT, 0 | ||
| + | CLOCK, 0 | ||
| + | CLOCK, 1 | ||
| + | DATA OUTPUT, 0 | ||
| + | CLOCK, 0 | ||
| + | CLOCK, 1 | ||
| + | DATA OUTPUT, 0 | ||
| + | CLOCK, 0 | ||
| + | DELAY 0b00001010uS | ||
| + | CS DISABLED | ||
| + | |||
| + | |||
| + | Take sample (1100 is the response for success, 00xx is for incomplete, xx11 is error, see p9 of datasheet) | ||
| + | |||
\[/-\/_\/_\/_\&&]&:10[&:10/-\/-\/_\/_\!!!!&!!!!!!!!!!!&!!!!!!!!!!!] | \[/-\/_\/_\/_\&&]&:10[&:10/-\/-\/_\/_\!!!!&!!!!!!!!!!!&!!!!!!!!!!!] | ||
| + | READ BIT: 1 | ||
| + | READ BIT: 1 | ||
| + | READ BIT: 0 | ||
| + | READ BIT: 0 | ||
| + | DELAY 0b00000001uS | ||
| + | READ BIT: 0 | ||
| + | READ BIT: 0 | ||
| + | READ BIT: 0 | ||
| + | READ BIT: 0 | ||
| + | READ BIT: 0 | ||
| + | READ BIT: 0 | ||
| + | READ BIT: 1 | ||
| + | READ BIT: 0 | ||
| + | READ BIT: 0 | ||
| + | READ BIT: 0 | ||
| + | READ BIT: 0 | ||
| + | DELAY 0b00000001uS | ||
| + | READ BIT: 1 | ||
| + | READ BIT: 1 | ||
| + | READ BIT: 1 | ||
| + | READ BIT: 1 | ||
| + | READ BIT: 1 | ||
| + | READ BIT: 1 | ||
| + | READ BIT: 1 | ||
| + | READ BIT: 1 | ||
| + | READ BIT: 1 | ||
| + | READ BIT: 0 | ||
| + | READ BIT: 0 | ||
Note that you need &&, because &:50000 doesn't seem to work, but the BusPirate parser obviously creates enough of a delay. | Note that you need &&, because &:50000 doesn't seem to work, but the BusPirate parser obviously creates enough of a delay. | ||
Revision as of 23:06, 2 September 2010
Module
$20-25 compass module for embedded systems. SMD will be cheaper.
Testing with the BusPirate
BusPirate settings:
- M (mode)
- 8 (3-wire raw)
- 4 (400KHz)
- 2 (3.3V high)
- W (turn on 5V output)
Reset:
\[/_\/_\/_\/_\&:10]
RAW3WIRE>\[/_\/_\/_\/_\&:10] CLOCK, 0 CS ENABLED CLOCK, 1 DATA OUTPUT, 0 CLOCK, 0 CLOCK, 1 DATA OUTPUT, 0 CLOCK, 0 CLOCK, 1 DATA OUTPUT, 0 CLOCK, 0 CLOCK, 1 DATA OUTPUT, 0 CLOCK, 0 DELAY 0b00001010uS CS DISABLED
Take sample (1100 is the response for success, 00xx is for incomplete, xx11 is error, see p9 of datasheet)
\[/-\/_\/_\/_\&&]&:10[&:10/-\/-\/_\/_\!!!!&!!!!!!!!!!!&!!!!!!!!!!!]
READ BIT: 1 READ BIT: 1 READ BIT: 0 READ BIT: 0 DELAY 0b00000001uS READ BIT: 0 READ BIT: 0 READ BIT: 0 READ BIT: 0 READ BIT: 0 READ BIT: 0 READ BIT: 1 READ BIT: 0 READ BIT: 0 READ BIT: 0 READ BIT: 0 DELAY 0b00000001uS READ BIT: 1 READ BIT: 1 READ BIT: 1 READ BIT: 1 READ BIT: 1 READ BIT: 1 READ BIT: 1 READ BIT: 1 READ BIT: 1 READ BIT: 0 READ BIT: 0
Note that you need &&, because &:50000 doesn't seem to work, but the BusPirate parser obviously creates enough of a delay.
Sample values:
0,-6 -1,-11 -1,-19