mjb/altos/src/stmf0/ao_adc_fast.c, branch tmgps

altos/stmf0: Use double buffering for ChaosKey

2018-01-08T05:44:39+00:00

This improves the USB performance of ChaosKey so that it doesn't NAK during data transfers at all. Signed-off-by: Keith Packard

altos/stmf0: Switch ADC fast to ADC clock

2016-08-09T05:39:16+00:00

Using this slower clock eliminates sampling problems with the ADC and cleans up the chaoskey raw data. Signed-off-by: Keith Packard

Switch from GPLv2 to GPLv2+

2016-07-12T22:41:41+00:00

Signed-off-by: Keith Packard

altos/stmf0: Add SPI driver.

2016-04-03T02:45:06+00:00

This also changes the DMA interface a bit so we can select for interrupts on only the interesting channels. Signed-off-by: Keith Packard

Clean up stmf0 adc init.

2016-02-09T02:55:28+00:00

This better matches the documented cal sequence. Signed-off-by: Keith Packard

altos/stmf0: Have fast ADC ring buffer code use wrap-around

2015-03-20T22:09:20+00:00

Instead of requiring that the whole set of returned values fit precisely in the ring, allow for wrap-around so that we can fetch an odd number of ADC values. The previous version required that the fetch amount always be a factor of the ADC buffer size. Signed-off-by: Keith Packard

altos/stmf0: Fix fast ADC interface

2015-03-01T00:10:10+00:00

This was configuring the hardware wrong, and wasn't keeping the output ring full. Signed-off-by: Keith Packard

altos/stmf0: Re-implement fast ADC code for stmf0

2015-01-28T04:41:15+00:00

This creates a ring buffer for ADC data so that ADC fetching can run in parallel with other activities. Signed-off-by: Keith Packard

altos/stmf0: Add ADC and DMA APIs

2015-01-27T06:14:57+00:00

The ADC api is what USBtrng wants; a way to repeatedly read a single ADC input as fast as possible. Signed-off-by: Keith Packard