ra8_io_spi_bus_sci_spi.c

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#include "ra8_io_spi_bus_sci_spi.h"
 
#include <stdint.h>
 
#include "ra8_attributes.h"
#include "ra8_check.h"
#include "ra8_err.h"
#include "ra8_io_spi_bus.h"
#include "ra8_io_spi_bus_internal.h"
#include "ra8_sci_regs.h"
#include "ra8_sci_spi.h"
#include "ra8_spi.h"

static const char* const s_tag = "ra8_io_spi_bus_sci_spi";

RA8_INTERNAL
RA8_INTERNAL static ra8_err_t internal_sci_spi_xfer8(void* ctx, uint8_t tx, uint8_t* rx)
{
  return ra8_sci_spi_xfer8((uint8_t)(uintptr_t)ctx, tx, rx);
}

RA8_INTERNAL
RA8_INTERNAL static ra8_err_t internal_sci_spi_write_read(void*               ctx,
                                                          const void*         tx,
                                                          void*               rx,
                                                          uint32_t            len,
                                                          ra8_spi_bit_width_t width)
{
  if (width != k_ra8_spi_width_8) {
    return k_ra8_err_not_supported;
  }
  return ra8_sci_spi_xfer((uint8_t)(uintptr_t)ctx, (const uint8_t*)tx, (uint8_t*)rx, len);
}

RA8_INTERNAL
RA8_INTERNAL static ra8_err_t
internal_sci_spi_set_clock(void* ctx, uint32_t baud_hz, uint32_t pclk_hz)
{
  return ra8_sci_spi_set_clock((uint8_t)(uintptr_t)ctx, baud_hz, pclk_hz);
}

static const ra8_io_spi_bus_iface_t s_sci_spi_iface = {
  .xfer8      = internal_sci_spi_xfer8,
  .write_read = internal_sci_spi_write_read,
  .set_clock  = internal_sci_spi_set_clock,
};
 
ra8_err_t ra8_io_spi_bus_bind_sci_spi(ra8_io_spi_bus_t* bus, uint8_t channel)
{
  RA8_CHECK_NULL_PTR(bus, s_tag, "bus must not be nullptr");
  if (channel >= (uint8_t)k_ra8_sci_channel_count) {
    return k_ra8_err_invalid_arg;
  }
  bus->iface = &s_sci_spi_iface;
  bus->ctx   = (void*)(uintptr_t)channel;
  return k_ra8_ok;
}