avr/uart/uart.h File Reference

#include <avr/io.h>
#include <avr/interrupt.h>

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Macros
#define	UART_BAUD_SELECT(baudRate, xtalCpu)   (((xtalCpu)+8UL*(baudRate))/(16UL*(baudRate))-1UL)
#define	UART_BAUD_SELECT_DOUBLE_SPEED(baudRate, xtalCpu)   ((((xtalCpu)+4UL*(baudRate))/(8UL*(baudRate))-1)|0x8000)
#define	ZRTOS_VFS_MODULE_AVR_UART__IS_DOUBLE_SPEED(baudrate)   (0)

Functions
uint16_t	zrtos_vfs_module_avr_uart__baud_select (zrtos_vfs_module_uart_baudrate_t baudrate)
void	zrtos_vfs_module_avr_uart__on_receive_interrupt (zrtos_vfs_module_uart_inode_t *thiz, uint8_t data, zrtos_error_t err)
bool	zrtos_vfs_module_avr_uart__on_transmit_interrupt (zrtos_vfs_module_uart_inode_t *thiz, uint8_t *data)

Macro Definition Documentation

UART_BAUD_SELECT

#define UART_BAUD_SELECT	(		baudRate,
			xtalCpu
	)		(((xtalCpu)+8UL*(baudRate))/(16UL*(baudRate))-1UL)

UART Baudrate Expression.

Parameters

xtalCpu	system clock in Mhz, e.g. 4000000L for 4Mhz
baudRate	baudrate in bps, e.g. 1200, 2400, 9600

Definition at line 263 of file avr/uart/uart.h.

UART_BAUD_SELECT_DOUBLE_SPEED

#define UART_BAUD_SELECT_DOUBLE_SPEED	(		baudRate,
			xtalCpu
	)		((((xtalCpu)+4UL*(baudRate))/(8UL*(baudRate))-1)|0x8000)

UART Baudrate Expression for ATmega double speed mode.

Parameters

xtalCpu	system clock in Mhz, e.g. 4000000L for 4Mhz
baudRate	baudrate in bps, e.g. 1200, 2400, 9600

Definition at line 269 of file avr/uart/uart.h.

ZRTOS_VFS_MODULE_AVR_UART__IS_DOUBLE_SPEED

#define ZRTOS_VFS_MODULE_AVR_UART__IS_DOUBLE_SPEED

(

baudrate

)

(0)

Definition at line 275 of file avr/uart/uart.h.

Function Documentation

zrtos_vfs_module_avr_uart__baud_select()

uint16_t zrtos_vfs_module_avr_uart__baud_select

(

zrtos_vfs_module_uart_baudrate_t

baudrate

)

Definition at line 279 of file avr/uart/uart.h.

 {
#ifdef ZRTOS_VFS_MODULE_UART__CFG_ENABLE_DOUBLE_SPEED
    uint16_t ret;
    if(baudrate & ZRTOS_VFS_MODULE_UART_BAUDRATE__DOUBLE_SPEED){
        baudrate = (zrtos_vfs_module_uart_baudrate_t)
            (baudrate & ZRTOS_VFS_MODULE_UART_BAUDRATE__MASK
        );
        ret = UART_BAUD_SELECT_DOUBLE_SPEED(baudrate,F_CPU);
    }else{
        ret = UART_BAUD_SELECT(baudrate,F_CPU);
    }
    return ret;
#else
    return UART_BAUD_SELECT(baudrate,F_CPU);
#endif
}

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zrtos_vfs_module_avr_uart__on_receive_interrupt()

void zrtos_vfs_module_avr_uart__on_receive_interrupt	(	zrtos_vfs_module_uart_inode_t *	thiz,
		uint8_t	data,
		zrtos_error_t	err
	)

Definition at line 298 of file avr/uart/uart.h.

 {
    zrtos_cbuffer_t *buffer = zrtos_vfs_module_uart_inode__get_cbuffer_in(
        thiz
    );

    if(zrtos_error__is_error(err)
    || zrtos_error__is_error((err = zrtos_cbuffer__put(
         buffer
        ,data
    )))
    || zrtos_error__is_error((err = thiz->on_recv(
            thiz
    )))
    ){
        zrtos_error_count__add(
             &thiz->rx_error_count
            ,err
        );
    }
}

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zrtos_vfs_module_avr_uart__on_transmit_interrupt()

bool zrtos_vfs_module_avr_uart__on_transmit_interrupt	(	zrtos_vfs_module_uart_inode_t *	thiz,
		uint8_t *	data
	)

Definition at line 323 of file avr/uart/uart.h.

 {
    zrtos_error_t err;
    zrtos_cbuffer_t *buffer = zrtos_vfs_module_uart_inode__get_cbuffer_out(
        thiz
    );

    if(zrtos_error__is_success((err = thiz->on_send(
        thiz
    )))
    ){
        if(zrtos_error__is_success(zrtos_cbuffer__get(buffer,data))){
            return true;
        }
    }else{
        zrtos_error_count__add(
             &thiz->tx_error_count
            ,err
        );
    }

    return false;
}

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