| Commit message (Collapse) | Author | Age |
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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 <keithp@keithp.com>
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Flash loader uses pin configuration to set up GPIOs for boot selection
Signed-off-by: Keith Packard <keithp@keithp.com>
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This lets the extra allocations used from ao_usb_alloc_buffers be
allocated before the first USB connection happens.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Extra semicolon
Signed-off-by: Keith Packard <keithp@keithp.com>
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This was configuring the hardware wrong, and wasn't keeping the output
ring full.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Tom discovered that this was missing
Signed-off-by: Keith Packard <keithp@keithp.com>
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Small pin-count versions of the STMF0 can remap PA11/PA12 on the same
pins as PA9/PA10. These are used by USB, so have the USB driver deal
with remapping them.
Signed-off-by: Keith Packard <keithp@keithp.com>
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This creates a ring buffer for ADC data so that ADC fetching can run
in parallel with other activities.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Sets up the stm32f0 CRC hardware, exposing inline functions to access
it. DMA access is possible, but usbtrng can't use that.
Signed-off-by: Keith Packard <keithp@keithp.com>
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These were left over from the stm32f0 initial implementation work; now
it's more useful to list only the bits which are valid.
Signed-off-by: Keith Packard <keithp@keithp.com>
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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 <keithp@keithp.com>
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This adds a way to allocate private USB buffers for sending data
without needing to copy it again. It requires ensuring that all
accesses are 16 bits aligned to 16 bit boundaries.
Signed-off-by: Keith Packard <keithp@keithp.com>
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The flash loader ended up assuming ao_boot was at the start of ram,
while the application stuck it after the interrupt table (where it
needs to go).
Signed-off-by: Keith Packard <keithp@keithp.com>
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Also moves the usual address for applications out of the way of the
flash loader.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Basic clock configuration, OS support, LED and USB drivers.
Signed-off-by: Keith Packard <keithp@keithp.com>
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