45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
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/** \file
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\brief CPU initialisation, AVR specific part.
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To be included from cpu.c, for details see there.
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*/
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#if defined TEACUP_C_INCLUDE && defined __AVR__
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#include <avr/io.h>
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#include "pinio.h"
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/** Initialise the CPU.
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This sets up the CPU the way we need it. It disables modules we don't use,
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so they don't mess on the I/O pins they're connected to.
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*/
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void cpu_init() {
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#ifdef PRR
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#if defined TEMP_MAX6675 || defined SD
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PRR = MASK(PRTWI) | MASK(PRADC);
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#else
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PRR = MASK(PRTWI) | MASK(PRADC) | MASK(PRSPI);
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#endif
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#elif defined PRR0
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#if defined TEMP_MAX6675 || defined SD
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PRR0 = MASK(PRTWI) | MASK(PRADC);
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#else
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PRR0 = MASK(PRTWI) | MASK(PRADC) | MASK(PRSPI);
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#endif
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#if defined(PRUSART3)
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// Don't use USART2 or USART3. Leave USART1 for GEN3 and derivatives.
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PRR1 |= MASK(PRUSART3) | MASK(PRUSART2);
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#endif
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#if defined(PRUSART2)
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// Don't use USART2 or USART3. Leave USART1 for GEN3 and derivatives.
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PRR1 |= MASK(PRUSART2);
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#endif
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#endif
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ACSR = MASK(ACD);
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}
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#endif /* defined TEACUP_C_INCLUDE && defined __AVR__ */
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