log_system.c File Reference

Driver file providing logging functionality over USART, to print debug messages and values to a teminal program on your PC. More...

#include <stdbool.h>
#include "usart.h"
#include "log_system.h"

Go to the source code of this file.

Functions
void	print_tag_and_log_level (const char *p_tag, log_type_t level)
	Utility function to print labels over serial. More...
bool	log_message_preference_check (log_system_config_t *p_config, log_type_t level)
	Utility function to test if the log message level meets the preferences set. More...
void	init_log_system (void)
	Initialisation routine - call this function once at startup before using other functions. More...
void	log_message (log_system_config_t *p_config, log_type_t level, const char *msg)
	Sends only the system tag, log level and message string. More...
void	log_message_with_dec_val (log_system_config_t *p_config, log_type_t level, const char *msg, uint8_t val)
	Sends a string, followed by an 8 bit value in decimal format. More...
void	log_message_with_bin_val (log_system_config_t *p_config, log_type_t level, const char *msg, uint8_t val)
	Sends a string, followed by an 8 bit value in binary format. More...
void	log_message_with_hex_val (log_system_config_t *p_config, log_type_t level, const char *msg, uint8_t val)
	Sends a string, followed by an 8 bit value in hexadecimal format. More...
void	log_set_file_max_output_level (log_system_config_t *p_config, log_type_t level)
	Sets maximum output level of logging required, to be used at file scope. More...
void	log_set_global_max_output_level (log_type_t level)
	Sets maximum output level of logging required, has global effect. More...
void	log_global_on (void)
	Turns logging system on globally. More...
void	log_global_off (void)
	Turns logging system off globally. More...

Variables
log_system_config_t	log_system_log
	Instantiation of log system config object, pass it's address into logging functions. More...

Detailed Description

Driver file providing logging functionality over USART, to print debug messages and values to a teminal program on your PC.

Copyright

Copyright © 2022 by Jason Duffy.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Author

Jason Duffy

Date

1st March 2022

Definition in file log_system.c.

Function Documentation

print_tag_and_log_level()

void print_tag_and_log_level	(	const char *	p_tag,
		log_type_t	level
	)

Utility function to print labels over serial.

Definition at line 260 of file log_system.c.

{
  if (level == NONE)
  {
 
  }
  usart_print_string("\n");
  usart_print_string(p_tag);
 
  if (level == ERROR)
  {
    usart_print_string(", ERROR: ");
  }
 
  else if (level == WARNING)
  {
    usart_print_string(", WARNING: ");
  }
 
  else if (level == INFO)
  {
    usart_print_string(", INFO: ");
  }
 
  else if (level == DEBUG)
  {
    usart_print_string(", DEBUG: ");
  }
 
  else if (level == VERBOSE_DEBUG)
  {
    usart_print_string(", VERBOSE_DEBUG: ");
  }
 
  else
  {
    usart_print_string(", INVALID_LOG_LEVEL: ");
  }
}

log_message_preference_check()

bool log_message_preference_check	(	log_system_config_t *	p_config,
		log_type_t	level
	)

Utility function to test if the log message level meets the preferences set.

Definition at line 304 of file log_system.c.

{
  // Test if log_system is enabled globally, if not then do nothing. 
  if (log_system_enabled)
  {
    // Test if the level of this log message meets global log preferences. 
    if (level <= global_max_output_level)
    {
      // Test if the level of this log message meets file level preferences.
      if (level <= p_config->file_log_level)
      {
        return true;
      }
    }
  }
  // If any of the above conditionals evaluate to false, return false. 
  return false;
}

init_log_system()

void init_log_system

(

void

)

Initialisation routine - call this function once at startup before using other functions.

Log system will then be turned on by default - call log_global_off() if you do not wish it to be.

Definition at line 76 of file log_system.c.

{
  init_usart();
  log_global_on();
  log_message(&log_system_log, INFO, "Log system initialised");
};

log_message()

void log_message	(	log_system_config_t *	p_config,
		log_type_t	level,
		const char *	msg
	)

Sends only the system tag, log level and message string.

Parameters

p_config	is a pointer to the log_system config object. Instantiate the config object at the head of each file where logging is required and pass it's address into this function.
level	is the level status of the log message - see log_type_t for available options.
msg	is the message to be logged, enclose it in "" quotation marks.

Definition at line 93 of file log_system.c.

{
  // If all test expressions evaluate true, log message.
  if (log_message_preference_check(p_config, level))
  {
    print_tag_and_log_level(p_config->p_system_tag, level);
    usart_print_string(msg);
   }
}

log_message_with_dec_val()

void log_message_with_dec_val	(	log_system_config_t *	p_config,
		log_type_t	level,
		const char *	msg,
		uint8_t	val
	)

Sends a string, followed by an 8 bit value in decimal format.

Parameters

p_config	is a pointer to the log_system config object. Instantiate the config object at the head of each file where logging is required and pass it's address into this function.
level	is the level status of the log message - see log_type_t for available options.
msg	is the message to be logged, enclose it in "" quotation marks.
val	is the numerical value to be logged - Acceptable values 0 - 255.

Definition at line 116 of file log_system.c.

{
  // If all test expressions evaluate true, log message.
  if (log_message_preference_check(p_config, level))
  {
    print_tag_and_log_level(p_config->p_system_tag, level);
    usart_print_string(msg);
    usart_print_string(" ");
    usart_print_byte(val); 
  }
}

log_message_with_bin_val()

void log_message_with_bin_val	(	log_system_config_t *	p_config,
		log_type_t	level,
		const char *	msg,
		uint8_t	val
	)

Sends a string, followed by an 8 bit value in binary format.

Parameters

p_config	is a pointer to the log_system config object. Instantiate the config object at the head of each file where logging is required and pass it's address into this function.
level	is the level status of the log message - see log_type_t for available options.
msg	is the message to be logged, enclose it in "" quotation marks.
val	is the numerical value to be logged - Acceptable values 0 - 255.

Definition at line 167 of file log_system.c.

{
  // If all test expressions evaluate true, log message.
  if (log_message_preference_check(p_config, level))
  {
    print_tag_and_log_level(p_config->p_system_tag, level);
    usart_print_string(msg);
    usart_print_string(" ");
    usart_print_binary_byte(val);
  }
}

log_message_with_hex_val()

void log_message_with_hex_val	(	log_system_config_t *	p_config,
		log_type_t	level,
		const char *	msg,
		uint8_t	val
	)

Sends a string, followed by an 8 bit value in hexadecimal format.

Parameters

p_config	is a pointer to the log_system config object. Instantiate the config object at the head of each file where logging is required and pass it's address into this function.
level	is the level status of the log message - see log_type_t for available options.
msg	is the message to be logged, enclose it in "" quotation marks.
val	is the numerical value to be logged - Acceptable values 0 - 255.

Definition at line 193 of file log_system.c.

{
  // If all test expressions evaluate true, log message.
  if (log_message_preference_check(p_config, level))
  {
    print_tag_and_log_level(p_config->p_system_tag, level);
    usart_print_string(msg);
    usart_print_string(" ");
    usart_print_hex_byte(val);
  }
}

log_set_file_max_output_level()

void log_set_file_max_output_level	(	log_system_config_t *	p_config,
		log_type_t	level
	)

Sets maximum output level of logging required, to be used at file scope.

Parameters

p_config	is a pointer to the log_system config object. Instantiate the config object at the head of each file where logging is required and pass it's address into this function.
level	is the maximum level required - see log_type_t for available options.

Definition at line 217 of file log_system.c.

{
  p_config->file_log_level = level;
}

log_set_global_max_output_level()

void log_set_global_max_output_level

(

log_type_t

level

)

Sets maximum output level of logging required, has global effect.

Parameters

level

is the maximum level required - see log_type_t for available options.

Definition at line 229 of file log_system.c.

{
  global_max_output_level = level;
}

log_global_on()

void log_global_on

(

void

)

Turns logging system on globally.

Definition at line 238 of file log_system.c.

{
  log_system_enabled = true;
}

log_global_off()

void log_global_off

(

void

)

Turns logging system off globally.

Definition at line 247 of file log_system.c.

{
  log_system_enabled = false;
}

Variable Documentation

log_system_log

log_system_config_t log_system_log

Initial value:

=
{
  .p_system_tag = "Log_System",
  .file_log_level = INFO,
}

Instantiation of log system config object, pass it's address into logging functions.

Definition at line 43 of file log_system.c.