Logger Class Reference

Logger class that outputs logs over USART. More...

#include <logger.h>

Collaboration diagram for Logger:

Public Member Functions
	Logger ()=default
	Construct a new Logger object.
void	init ()
	Initialize USART. More...
void	operator() (const char *str) const
	Functor to log a string. More...
void	operator() (const uint8_t *arr, const uint8_t len) const
	Functor to log an array of hex-values. More...

Private Member Functions
void	sendChar (const char c) const
	Transmit a single character over USART. More...
void	sendStr (const char *str) const
	Transmit a string over USART. More...

Static Private Attributes
static constexpr uint16_t	UBRR0_VALUE = F_CPU/(8*BAUD)-1
	UBRR0 value for initializing USART. More...

Detailed Description

Logger class that outputs logs over USART.

Authors

Philipp Karg (phili.nosp@m.pp.k.nosp@m.arg@t.nosp@m.um.d.nosp@m.e)

Date

02.06.2022

Copyright

Philipp Karg 2022

Member Function Documentation

init()

void Logger::init

(

)

Initialize USART.

1. Enable double speed.
2. Set baud-rate in both UBRR registers with UBRR0_VALUE.
3. Enable the transmitter.
4. Set the data frame (8 data-bits, 1 stop-bit).

operator()() [1/2]

void Logger::operator() ( const char *  str ) const

inline

Functor to log a string.

Parameters

[in]

str

(const char*): String to log.

operator()() [2/2]

void Logger::operator()	(	const uint8_t *	arr,
		const uint8_t	len
	)		const

Functor to log an array of hex-values.

Parameters

[in]	arr	(const uint8_t*): Array of hex values to log.
[in]	len	(const uint8_t): Length of the array.

sendChar()

void Logger::sendChar ( const char  c ) const

private

Transmit a single character over USART.

1. Wait for an empty transmit buffer.
2. Write c into the buffer.

Parameters

[in]

c

(const char): Character to send.

sendStr()

void Logger::sendStr ( const char *  str ) const

private

Transmit a string over USART.

Continuously call sendChar() and send each character of str.

Parameters

[in]

str

(const char*): String to send.

Member Data Documentation

UBRR0_VALUE

constexpr uint16_t Logger::UBRR0_VALUE = F_CPU/(8*BAUD)-1

staticconstexprprivate

UBRR0 value for initializing USART.

This value was found through trial and error. According to the data-sheet, this value should be calculated as the following: UBRR0 = f_clk/(16*BAUD) - 1 However this did not work with the provided clock-frequency of 3276800 in the manual.

---

The documentation for this class was generated from the following file:

• logger.h