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This is useful for debugging the SPI and flash drivers, but not
necessary in production code.
Signed-off-by: Keith Packard <keithp@keithp.com>
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The USART is used for SPI to talk to the flash part.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Signed-off-by: Keith Packard <keithp@keithp.com>
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We can't write general purpose SPI slave code as we must eliminate
any latency because the SPI ports have no buffering.
Signed-off-by: Keith Packard <keithp@keithp.com>
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This completes the basic task of making an AVR version of altos by
getting the Teensy 'avr-demo' program to build.
Signed-off-by: Keith Packard <keithp@keithp.com>
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More arch-indepdency bits.
GCC stdio is different from SDCC, so create suitable code in
avr/ao_avr_stdio.c
Create macros to initialize the task stack frame and save the task
context.
Add GCC/SDCC type definition compatibility macros
Signed-off-by: Keith Packard <keithp@keithp.com>
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