/* Copyright 2018 The TensorFlow Authors. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==============================================================================*/

#include "tensorflow/lite/micro/debug_log.h"

#include <stm32f4xx_hal.h>
#include <stm32f4xx_hal_uart.h>

#include <cstdio>

#ifdef __GNUC__
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */

extern UART_HandleTypeDef DEBUG_UART_HANDLE;

PUTCHAR_PROTOTYPE {
  HAL_UART_Transmit(&DEBUG_UART_HANDLE, (uint8_t *)&ch, 1, HAL_MAX_DELAY);

  return ch;
}

extern "C" void DebugLog(const char *s) { fprintf(stderr, "%s", s); }

Debug log implementation to use the STM32 HAL UART implementation. Redirects (f)printf HAL_UART_Transmit using a UART_HandleTypeDef that must be provided as DEBUG_UART_HANDLE
Debug log implementation to use the STM32 HAL UART implementation. Redirects (f)printf HAL_UART_Transmit using a UART_HandleTypeDef that must be provided as DEBUG_UART_HANDLE
