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35 lines
1.4 KiB
35 lines
1.4 KiB
4 years ago
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#include "quantum.h"
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/* Adapted from https://github.com/bigjosh/SimpleNeoPixelDemo/ */
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#ifndef NOP_FUDGE
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# if defined(STM32F0XX) || defined(STM32F1XX) || defined(STM32F3XX) || defined(STM32F4XX) || defined(STM32L0XX)
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# define NOP_FUDGE 0.4
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# else
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# error("NOP_FUDGE configuration required")
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# define NOP_FUDGE 1 // this just pleases the compile so the above error is easier to spot
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# endif
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#endif
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#define NUMBER_NOPS 6
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#define CYCLES_PER_SEC (STM32_SYSCLK / NUMBER_NOPS * NOP_FUDGE)
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#define NS_PER_SEC (1000000000L) // Note that this has to be SIGNED since we want to be able to check for negative values of derivatives
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#define NS_PER_CYCLE (NS_PER_SEC / CYCLES_PER_SEC)
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#define NS_TO_CYCLES(n) ((n) / NS_PER_CYCLE)
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#define wait_ns(x) \
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do { \
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for (int i = 0; i < NS_TO_CYCLES(x); i++) { \
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__asm__ volatile("nop\n\t" \
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"nop\n\t" \
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"nop\n\t" \
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"nop\n\t" \
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"nop\n\t" \
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"nop\n\t"); \
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} \
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} while (0)
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void gamecube_init(void);
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void gamecube_scan(uint16_t * buttons, uint8_t * joysticks);
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