mjb/altos/src, branch teleterra

altos: M25P driver had bogus extra arguments in flash info printf format.

2010-11-02T06:27:45+00:00

Signed-off-by: Keith Packard

Revert "teleterra: hack to leave amp on all the time"

2010-11-02T06:23:19+00:00

Don't leave the amp on anymore. This reverts commit 1557b0049e0b8a7995c54cde8b7a19cce49445a6.

altos: Fix remaining SPI users to initialize SPI in main

2010-11-02T06:21:16+00:00

Any product using SPI must initialize the SPI bus along with the SPI-based drivers. Signed-off-by: Keith Packard

altos: Don't initialize SPI bus twice.

2010-11-02T06:18:18+00:00

Signed-off-by: Keith Packard

altos: Cannot scan for flash chips until the OS is running.

2010-11-02T06:10:05+00:00

Signed-off-by: Keith Packard

altos: Split out SPI driver. Add Numonyx M25P driver for TT.

2010-11-02T00:30:49+00:00

For TT (and TM with the companion connector), the SPI bus will be shared among multiple devices. Split out the existing SPI code into a common driver, with the SPI bus protected by a mutex. Add the Numonyx M25Pxx driver to support the flash chips on TT and newer TM versions. This is not yet integrated into the TM code. Signed-off-by: Keith Packard

teleterra: hack to leave amp on all the time

2010-11-01T07:29:03+00:00

teleterra: audio amp is enabled by bringing audio_en (P2_4) high

2010-11-01T05:51:48+00:00

The external audio amplifier is placed in 'suspend' mode most of the time to save power. When audio is being sent, turn it on. Signed-off-by: Keith Packard

teleterra: comment the audio output implementation a bit better

2010-10-31T07:49:34+00:00

Signed-off-by: Keith Packard

teleterra: Add PWM audio system

2010-10-31T07:38:39+00:00

This uses timers 3 and 4 to emit 8-bit 11025Hz audio using a 93.8kHz carrier. A simple low-pass filter to eliminate the 93.8kHz signal results in credible 8-bit audio. There is a giant sample for testing in the ao_audio code which shouldn't be included in a product. Signed-off-by: Keith Packard