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#ifndef SPI_CONFIG_H_
#define SPI_CONFIG_H_
#include <avr/io.h>
#include <avr/pgmspace.h>
#include "util.h"
#include "coproc-firmware/spi_interface.h"
/* No async for the bootloader */
#ifdef BOOTLOADER
# define SPI_HAVE_ASYNC 0
#else
# define SPI_HAVE_ASYNC 1
#endif
enum spi_async_flags {
SPI_ASYNC_RUNNING = (1 << 0),
SPI_ASYNC_TXPROGMEM = (1 << 1), /* TX buffer is in progmem */
};
void spi_async_start(void *rxbuf, const void *txbuf,
uint8_t nr_bytes, uint8_t flags, uint8_t wait_ms);
bool spi_async_running(void);
void spi_async_ms_tick(void);
extern void spi_async_done(void);
static inline void spi_slave_select(bool select)
{
if (select)
PORTB = (uint8_t)(PORTB & ~(1u << 4/*SS*/));
else
PORTB = (uint8_t)(PORTB | (1u << 4/*SS*/));
}
uint8_t spi_transfer_sync(uint8_t tx);
uint8_t spi_transfer_slowsync(uint8_t tx);
void spi_lowlevel_exit(void);
void spi_lowlevel_init(void);
#endif /* SPI_CONFIG_H_ */
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