This group contains the Zynq UART support. More...

Files
file	bsps/include/dev/serial/zynq-uart-regs.h
	This header file provides Zynq UART interfaces.
file	bsps/include/dev/serial/zynq-uart-zynq.h
	This header file provides interfaces with respect to the Zynq platform.
file	bsps/include/dev/serial/zynq-uart-zynqmp.h
	This header file provides interfaces with respect to the Zynq UltraScale+ MPSoC and RFSoC platforms.
file	bsps/include/dev/serial/zynq-uart.h
	This header file provides Zynq UART Termios driver interfaces.
file	bsps/shared/dev/serial/zynq-uart-input-clock.c
	This source file contains the implementation of the polled Zynq UART support.
file	bsps/shared/dev/serial/zynq-uart-kernel-io.c
	This source file contains the definition of BSP_output_char and BSP_poll_char.
file	bsps/shared/dev/serial/zynq-uart-polled.c
	This source file contains the implementation of the polled Zynq UART support.

Macros
#define	ZYNQ_UART_DEFAULT_BAUD 115200
#define	ZYNQ_UART_FIFO_DEPTH 64
#define	ZYNQ_UART_0_BASE_ADDR 0xe0000000
	This constant defines the Xilinx Zynq UART 0 base address.
#define	ZYNQ_UART_1_BASE_ADDR 0xe0001000
	This constant defines the Xilinx Zynq UART 1 base address.
#define	ZYNQ_UART_0_BASE_ADDR 0xff000000
	This constant defines the Xilinx Zynq UART 0 base address.
#define	ZYNQ_UART_1_BASE_ADDR 0xff010000
	This constant defines the Xilinx Zynq UART 1 base address.

Typedefs
typedef struct zynq_uart	zynq_uart

Functions
void	zynq_uart_initialize (volatile zynq_uart *regs)
int	zynq_uart_read_char_polled (volatile zynq_uart *regs)
void	zynq_uart_write_char_polled (volatile zynq_uart *regs, char c)
void	zynq_uart_reset_tx_flush (volatile zynq_uart *regs)
uint32_t	zynq_uart_input_clock (void)
	Returns the Zynq UART input clock frequency in Hz.
uint32_t	zynq_uart_calculate_baud (uint32_t desired_baud, uint32_t mode_clks, uint32_t cd_ptr, uint32_t bdiv_ptr)
	Calculates the clock and baud divisor of the best approximation of the desired baud.

Variables
const rtems_termios_device_handler	zynq_uart_handler

Detailed Description

This group contains the Zynq UART support.

Function Documentation

uint32_t zynq_uart_calculate_baud	(	uint32_t	desired_baud,
		uint32_t	mode_clks,
		uint32_t *	cd_ptr,
		uint32_t *	bdiv_ptr )

Calculates the clock and baud divisor of the best approximation of the desired baud.

The function tries to yield a sample set around 16 per RX-bit.

Parameters

desired_baud	is the desired baud for an Zynq UART device.
mode_clks	is the value of the CLKS bit of the Zynq UART mode register.
cd_ptr[out]	is a reference to an uint32_t object. The function stores the calculated clock divisor to this object.
bdiv_ptr[out]	is a reference to an uint32_t object. The function stores the calculated baud divisor to this object.

Returns: Returns the absolute error of the calculated baud to the desired baud in Hz.

void zynq_uart_reset_tx_flush ( volatile zynq_uart * regs )

Flush TX FIFO and wait until it is empty. Used in bsp_reset.