#include "quantum.h"

/* Adapted from https://github.com/bigjosh/SimpleNeoPixelDemo/ */

#ifndef NOP_FUDGE
#    if defined(STM32F0XX) || defined(STM32F1XX) || defined(STM32F3XX) || defined(STM32F4XX) || defined(STM32L0XX)
#        define NOP_FUDGE 0.4
#    else
#        error("NOP_FUDGE configuration required")
#        define NOP_FUDGE 1  // this just pleases the compile so the above error is easier to spot
#    endif
#endif

#define NUMBER_NOPS 6
#define CYCLES_PER_SEC (STM32_SYSCLK / NUMBER_NOPS * NOP_FUDGE)
#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
#define NS_PER_CYCLE (NS_PER_SEC / CYCLES_PER_SEC)
#define NS_TO_CYCLES(n) ((n) / NS_PER_CYCLE)

#define wait_ns(x)                                  \
    do {                                            \
        for (int i = 0; i < NS_TO_CYCLES(x); i++) { \
            __asm__ volatile("nop\n\t"              \
                             "nop\n\t"              \
                             "nop\n\t"              \
                             "nop\n\t"              \
                             "nop\n\t"              \
                             "nop\n\t");            \
        }                                           \
    } while (0)


void gamecube_init(void);
void gamecube_scan(uint16_t * buttons, uint8_t * joysticks);