text: /*
   * Copyright (c) 2018 Nordic Semiconductor ASA
   *
   * SPDX-License-Identifier: Apache-2.0
   */
  
  #include <logging/log_backend.h>
  #include <logging/log_core.h>
  #include <logging/log_msg.h>
  #include <logging/log_output.h>
  #include <device.h>
  #include <uart.h>
  #include <assert.h>
  
  static int char_out(u8_t *data, size_t length, void *ctx)
  {
  	struct device *dev = (struct device *)ctx;
  
  	for (size_t i = 0; i < length; i++) {
  		uart_poll_out(dev, data[i]);
  	}
  
  	return length;
  }
  
  static u8_t buf;
  
  LOG_OUTPUT_DEFINE(log_output, char_out, &buf, 1);
  
  static void put(const struct log_backend *const backend,
  		struct log_msg *msg)
  {
  	log_msg_get(msg);
  
  	u32_t flags = LOG_OUTPUT_FLAG_LEVEL | LOG_OUTPUT_FLAG_TIMESTAMP;
  
  	if (IS_ENABLED(CONFIG_LOG_BACKEND_SHOW_COLOR)) {
  		flags |= LOG_OUTPUT_FLAG_COLORS;
  	}
  
  	if (IS_ENABLED(CONFIG_LOG_BACKEND_FORMAT_TIMESTAMP)) {
  		flags |= LOG_OUTPUT_FLAG_FORMAT_TIMESTAMP;
  	}
  
  	log_output_msg_process(&log_output, msg, flags);
  
  	log_msg_put(msg);
  
  }
  
  static void log_backend_uart_init(void)
  {
  	struct device *dev;
  
  	dev = device_get_binding(CONFIG_UART_CONSOLE_ON_DEV_NAME);
  	assert(dev);
  
  	log_output_ctx_set(&log_output, dev);
  }
  
  static void panic(struct log_backend const *const backend)
  {
  }
  
  const struct log_backend_api log_backend_uart_api = {
  	.put = put,
  	.panic = panic,
  	.init = log_backend_uart_init,
  };
  
  LOG_BACKEND_DEFINE(log_backend_uart, log_backend_uart_api);
  