ra8_io_stream_uart.c

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#include "ra8_io_stream_uart.h"
 
#include <stdint.h>
 
#include "ra8_attributes.h"
#include "ra8_check.h"
#include "ra8_err.h"
#include "ra8_io_stream_backend.h"
#include "ra8_sci.h"

static const char* const s_tag = "ra8_io_stream_uart";

RA8_INTERNAL static ra8_err_t
internal_uart_write(void* ctx, const uint8_t* buf, uint32_t len, uint32_t* out_written)
{
  RA8_CHECK_NULL_PTR(ctx, s_tag, "ctx must not be nullptr");
  RA8_CHECK_NULL_PTR(buf, s_tag, "buf must not be nullptr");
  const ra8_io_stream_uart_state_t* st = (const ra8_io_stream_uart_state_t*)ctx;
  const ra8_err_t                   e  = ra8_sci_write_polling(st->channel, buf, len);
  if (e != k_ra8_ok) {
    return e;
  }
  if (out_written != nullptr) {
    *out_written = len;
  }
  return k_ra8_ok;
}

RA8_INTERNAL static ra8_err_t internal_uart_flush(void* ctx)
{
  RA8_CHECK_NULL_PTR(ctx, s_tag, "ctx must not be nullptr");
  const ra8_io_stream_uart_state_t* st = (const ra8_io_stream_uart_state_t*)ctx;
  return ra8_sci_flush(st->channel);
}

static const ra8_io_stream_iface_t s_uart_iface = {
  .write = internal_uart_write,
  .flush = internal_uart_flush,
};
 
ra8_err_t
ra8_io_stream_uart_init(ra8_io_stream_t* s, ra8_io_stream_uart_state_t* state, uint8_t channel)
{
  RA8_CHECK_NULL_PTR(s, s_tag, "s must not be nullptr");
  RA8_CHECK_NULL_PTR(state, s_tag, "state must not be nullptr");
  state->channel = channel;
  return ra8_io_stream_bind(s, &s_uart_iface, state);
}