?? uart_bdr.h
字號:
/*H**************************************************************************
* NAME: uart_bdr.h
*----------------------------------------------------------------------------
* Copyright (c) 2006 Atmel.
*----------------------------------------------------------------------------
* RELEASE: at90usb128-demo-cdc-1_0_3
* REVISION: 1.5.2.3
*----------------------------------------------------------------------------
* PURPOSE:
* Provide Baudrate configuration for MCU
*****************************************************************************/
#ifndef _UART_BDR_H
#define _UART_BDR_H
#ifndef AVRGCC
#define Uart_set_baudrate(bdr) ( UBRRH = (Uchar)((((Uint32)FOSC*1000L)/((Uint32)bdr*16)-1)>>8),\
UBRRL = (Uchar)(((Uint32)FOSC*1000 )/((Uint32)bdr*16)-1) )
#else
#define Uart_set_baudrate(bdr) ( UBRR = (U16)(((U32)FOSC*1000L)/((U32)bdr*16)-1))
#endif
#define Uart_double_bdr() (UCSRA |= (1<<U2X1))
#endif/* _UART_BDR_H */
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