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Stop using cli/sei, which are avr-specific
Signed-off-by: Keith Packard <keithp@keithp.com>
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Fix both clock time and rise time.
Signed-off-by: Keith Packard <keithp@keithp.com>
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This slows the i2c bus to 100kHz (yuck), sets the rise time to spec
(it was way off) and adds more delays during bus setup. I've run this
for hours now without trouble. Will try to adjust things back to fast
mode and see if I can make that work as 100kHz isn't fast enough to
reliably get data at 100 samples/sec.
Signed-off-by: Keith Packard <keithp@keithp.com>
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This seems better than the random loop that it replaces, but I still
have no idea why this is required; it doesn't coorespond to the docs
at all...
Signed-off-by: Keith Packard <keithp@keithp.com>
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The fancy stm i2c debugging code had calls to flush() that were
invoked outside of the conditionals leading to all kinds of fun --
flush() may re-enable interrupts, yield or do all kinds of wacky
stuff, none of which is appropriate from the middle of a device driver
Signed-off-by: Keith Packard <keithp@keithp.com>
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I have no idea why this is required, but the mpu6000 will not come up
and run if this isn't present.
Signed-off-by: Keith Packard <keithp@keithp.com>
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In case it's wedged.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Signed-off-by: Keith Packard <keithp@keithp.com>
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This waits for the stop signal to appear on the bus, necessary before
starting another transaction.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Transaction appears to be clean on the i2c bus now; correct number of
bytes received, and the nack and stop at the right time. This tests >
2 length reads; should try that too.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Start now driven by interrupts
Send now done with DMA and interrupts
Signed-off-by: Keith Packard <keithp@keithp.com>
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Recv doesn't appear to work with more than one byte
Signed-off-by: Keith Packard <keithp@keithp.com>
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Not well tested yet...
Signed-off-by: Keith Packard <keithp@keithp.com>
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