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path: root/src/stm/ao_dma_stm.c
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* altos/stm: Allow DMA channels to be hijacked by other codeKeith Packard2017-02-20
| | | | | | | This lets code which needs finer control over DMA to use the channel without interference, and leaves the DMA engine running so that it can. Signed-off-by: Keith Packard <keithp@keithp.com>
* altos/stm: Interrupt priority is in the upper bits of the priority maskKeith Packard2017-02-20
| | | | | | | | | | Because the STM32L only offers 16 priority levels, the bottom four bits of each priority mask are not used. All of the interrupt priority settings in the system were using values < 16, making them all effectively the same. Fix that by moving them into the upper 4 bits and using symbolic constants everywhere. Signed-off-by: Keith Packard <keithp@keithp.com>
* Switch from GPLv2 to GPLv2+Keith Packard2016-07-12
| | | | Signed-off-by: Keith Packard <keithp@keithp.com>
* altos: Add STM DMA debuggingKeith Packard2016-06-29
| | | | | | | This provides a command that shows current DMA operations when compiled with -DDEBUG=1. Without that, this patch has no effect. Signed-off-by: Keith Packard <keithp@keithp.com>
* altos/stm: use 0xff for dma mutex value for allocated mutexesKeith Packard2016-06-29
| | | | | | | DMA channels which are 'allocated' can't be shared. Instead of using the value '1' in the related 'mutex', use 0xff which won't match any task. Signed-off-by: Keith Packard <keithp@keithp.com>
* altos/stm: remove ao_dma_abortKeith Packard2016-06-29
| | | | | | This function isn't used anywhere. Signed-off-by: Keith Packard <keithp@keithp.com>
* altos: stm: pass DMA buffer index to DMA completion callbackKeith Packard2012-05-07
| | | | | | This lets the user know which DMA has finished. Signed-off-by: Keith Packard <keithp@keithp.com>
* altos: Starting to write cc1120 driverKeith Packard2012-04-17
| | | | | | | This does "something" in radio test mode, appearing to generate a 730MHz signal. Signed-off-by: Keith Packard <keithp@keithp.com>
* altos: Allow STM DMA channels to be reserved for one useKeith Packard2012-04-09
| | | | | | | | | This allows a single user of a DMA channel to reserve it for use without needing to lock the mutex; this is required for DMA from the ADC to work on megametrum as it wants to start DMA from an interrupt handler, which cannot block on a mutex. Signed-off-by: Keith Packard <keithp@keithp.com>
* altos: Add support for STM ADCKeith Packard2012-04-07
| | | | | | DMA-based driver for the STM analog to digital converter. Signed-off-by: Keith Packard <keithp@keithp.com>
* altos: Disable DMA unit when idleKeith Packard2012-04-06
| | | | | | Should save a bit of power Signed-off-by: Keith Packard <keithp@keithp.com>
* altos: Add DMA, SPI and MS5607 driversKeith Packard2012-04-06
Signed-off-by: Keith Packard <keithp@keithp.com>
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