L4::Uart_apb Class Reference

Driver for the Advanced Peripheral Bus (APB) UART from the Cortex-M System Design Kit (apb). More...

#include <uart_apb.h>

Inheritance diagram for L4::Uart_apb:

Collaboration diagram for L4::Uart_apb:

Public Member Functions
	Uart_apb (unsigned freq)
	freq == 0 means unknown and don't change baud rate
bool	startup (Io_register_block const *) override
	Start the UART driver.
void	shutdown () override
	Terminate the UART driver.
bool	change_mode (Transfer_mode m, Baud_rate r) override
	Set certain parameters of the UART.
bool	enable_rx_irq (bool enable) override
	Enable the receive IRQ.
int	get_char (bool blocking=true) const override
	Read a character from the UART.
int	char_avail () const override
	Check if there is at least one character available for reading from the UART.
int	write (char const *s, unsigned long count, bool blocking=true) const override
	Transmit a number of characters.
Public Member Functions inherited from L4::Uart
virtual void	irq_ack ()
	Acknowledge a received interrupt.
Transfer_mode	mode () const
	Return the transfer mode.
Baud_rate	rate () const
	Return the baud rate.

Additional Inherited Members
Protected Member Functions inherited from L4::Uart
template<typename Uart_driver >
int	generic_write (char const *s, unsigned long count, bool blocking=true) const
	Internal function transmitting each character one-after-another and finally waiting that the transmission did actually finish.

Detailed Description

Driver for the Advanced Peripheral Bus (APB) UART from the Cortex-M System Design Kit (apb).

Definition at line 18 of file uart_apb.h.

Member Function Documentation

change_mode()

bool L4::Uart_apb::change_mode ( Transfer_mode  m, Baud_rate  r  )

overridevirtual

Set certain parameters of the UART.

Parameters

m	UART mode. Depends on the hardware.
r	Baud rate.

Return values

true	Mode setting succeeded (or was not performed at all).
false	Mode setting failed for some reason.

Note

Some drivers don't perform any mode setting at all and just return true.

Implements L4::Uart.

char_avail()

int L4::Uart_apb::char_avail ( ) const

overridevirtual

Check if there is at least one character available for reading from the UART.

Returns

0 if there is no character available for reading, !=0 otherwise.

Implements L4::Uart.

enable_rx_irq()

bool L4::Uart_apb::enable_rx_irq ( bool  )

overridevirtual

Enable the receive IRQ.

Return values

true	The RX IRQ was successfully enabled / disabled.
false	The RX IRQ couldn't be enabled / disabled. The driver does not support this operation.

Reimplemented from L4::Uart.

get_char()

int L4::Uart_apb::get_char ( bool  blocking = true ) const

overridevirtual

Read a character from the UART.

Parameters

blocking

If true, wait until a character is available for reading. Otherwise do not wait and just return -1 if no character is available.

Returns

The actual character read from the UART.

Implements L4::Uart.

shutdown()

void L4::Uart_apb::shutdown ( )

overridevirtual

Terminate the UART driver.

This includes disabling of interrupts.

Implements L4::Uart.

startup()

bool L4::Uart_apb::startup ( Io_register_block const *  regs )

overridevirtual

Start the UART driver.

Parameters

regs	IO register block of the UART.

Return values

true	Startup succeeded.
false	Startup failed.

Implements L4::Uart.

write()

int L4::Uart_apb::write ( char const *  s, unsigned long  count, bool  blocking = true  ) const

overridevirtual

Transmit a number of characters.

Parameters

s	Buffer containing the characters.
count	Number of characters to transmit.
blocking	If true, wait until there is space in the transmit buffer and also wait until every character was successful transmitted. Otherwise do not wait.

Returns

The number of successfully written characters.

Implements L4::Uart.

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

• pkg/drivers-frst/uart/include/uart_apb.h