usb_msc_sdcard_console.c

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#include <stddef.h>
#include <stdint.h>
 
#include "ra8_board_ek_ra8d2.h"
#include "ra8_err.h"
#include "usb_msc_sdcard_steps.h"
 
/* -------------------------------------------------------------------------- */
/* Console helpers (SCI8 -> J-Link OB CDC) */
/* -------------------------------------------------------------------------- */

static uint8_t sdmsc_nibble_to_hex(uint32_t nibble)
{
  if (nibble < k_sdmsc_hex_digit_split) {
    return (uint8_t)((uint8_t)'0' + (uint8_t)nibble);
  }
  return (uint8_t)((uint8_t)'A' + (uint8_t)nibble - (uint8_t)k_sdmsc_hex_digit_split);
}

static uint32_t sdmsc_str_len(const char* text)
{
  uint32_t len = 0U;
  while (len < (uint32_t)k_sdmsc_print_cap) {
    if (text[len] == '\0') {
      break;
    }
    len++;
  }
  return len;
}

[[nodiscard]] static ra8_err_t sdmsc_sci_write(const uint8_t* data, uint32_t len)
{
  return ra8_board_uart_console_write(data, (size_t)len);
}
 
[[nodiscard]] ra8_err_t sdmsc_print(const char* text)
{
  return sdmsc_sci_write((const uint8_t*)text, sdmsc_str_len(text));
}

[[nodiscard]] ra8_err_t sdmsc_print_dec(uint32_t value)
{
  uint8_t  scratch[k_sdmsc_dec_chars_u32] = {};
  uint8_t  out[k_sdmsc_dec_chars_u32]     = {};
  uint8_t  count                          = 0U;
  uint32_t v                              = value;
  if (v == 0U) {
    out[0] = (uint8_t)'0';
    return sdmsc_sci_write(out, 1U);
  }
  while (v != 0U) {
    if (count >= (uint8_t)k_sdmsc_dec_chars_u32) {
      break;
    }
    scratch[count] = (uint8_t)((uint8_t)'0' + (uint8_t)(v % k_sdmsc_dec_radix));
    v              = v / k_sdmsc_dec_radix;
    count++;
  }
  for (uint8_t i = 0U; i < count; i++) {
    out[i] = scratch[count - 1U - i];
  }
  return sdmsc_sci_write(out, (uint32_t)count);
}

[[nodiscard]] ra8_err_t sdmsc_print_hex(uint32_t value, uint8_t digits)
{
  uint8_t out[k_sdmsc_hex_chars_u32] = {};
  uint8_t width                      = digits;
  if (width > (uint8_t)k_sdmsc_hex_chars_u32) {
    width = (uint8_t)k_sdmsc_hex_chars_u32;
  }
  for (uint8_t i = 0U; i < width; i++) {
    const uint8_t shift = (uint8_t)((width - 1U - i) * k_sdmsc_nibble_bits);
    out[i]              = sdmsc_nibble_to_hex((value >> shift) & k_sdmsc_nibble_mask);
  }
  return sdmsc_sci_write(out, (uint32_t)width);
}
 
[[nodiscard]] ra8_err_t sdmsc_print_fail(const char* what, ra8_err_t err)
{
  ra8_err_t e = sdmsc_print("usb_msc_sdcard: FAIL ");
  if (e != k_ra8_ok) {
    return e;
  }
  e = sdmsc_print(what);
  if (e != k_ra8_ok) {
    return e;
  }
  e = sdmsc_print(" err=0x");
  if (e != k_ra8_ok) {
    return e;
  }
  e = sdmsc_print_hex((uint32_t)err, (uint8_t)k_sdmsc_hex_chars_u32);
  if (e != k_ra8_ok) {
    return e;
  }
  return sdmsc_print("\r\n");
}