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usartx.h
gehe zur Dokumentation dieser Datei
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#ifndef UARTX_H
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#define UARTX_H
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/*
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* Only the file that defines OWNER creates the FILE objects below.
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*/
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#include <stdio.h>
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#ifdef OWNER
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#define EXTERN
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#else
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#define EXTERN extern
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#endif
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/* Definitionen für USART */
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#define BAUD_SETTINGS
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//#define BAUDRATE_USART 38400
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//#define BAUDRATE_USART 57600
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#define BAUDRATE_USART 115200
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//#define BAUDRATE_USART 230400
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// Excel-Tabelle zur Berechnung von BSEL und BSCALE, Doublespeed beachten !
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#define DOUBLESPEED 0
/* 1 = 2x clock, 0 = 1x clock */
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// Werte aus Tabelle im Datenblatt für 32 MHz CPU und 2xCLK = 0
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#if BAUDRATE_USART == 19200
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#define BSEL_USART 12
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#define BSCALE 0x03
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#elif BAUDRATE_USART == 28800
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#define BSEL_USART 137
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#define BSCALE 0xFF // BSCALE -1 => Zweierkomplement 0xFF
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#elif BAUDRATE_USART == 38400
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#define BSEL_USART 12
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#define BSCALE 0x02
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#elif BAUDRATE_USART == 57600
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#define BSEL_USART 135
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#define BSCALE 0xFE // BSCALE -2 => Zweierkomplement 0xFE
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#elif BAUDRATE_USART == 115200
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#define BSEL_USART 2094
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#define BSCALE 0xF9 // BSCALE -7 => Zweierkomplement 0xF9
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#elif BAUDRATE_USART == 230400
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#define BSEL_USART 983
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#define BSCALE 0xF9 // BSCALE -7 => Zweierkomplement 0xF9
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#endif
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#define BAUD_A ((BSEL_USART) & 0xFF)
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#define BAUD_B (((BSEL_USART >> 8) | (BSCALE << 4)) & 0xFF)
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#ifndef IN_FILENO
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#define IN_FILENO 0
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#define OUT_FILENO 1
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#define ERR_FILENO 2
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#endif
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#ifndef NUM_USARTS
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#define NUM_USARTS 6
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#endif
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//extern FILE usartout = FDEV_SETUP_STREAM(USART_putchar, NULL, _FDEV_SETUP_WRITE);
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//extern FILE usartin = FDEV_SETUP_STREAM(NULL, USART_getchar, _FDEV_SETUP_READ);
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// -----------------------------------------------------------------------------
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/*
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* Define enums for selecting one of the eight USARTS.
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*/
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enum
usart_ids
// these are local-only indices into the queue, inptr, and outptr arrays
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{
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eUSARTC0 = 0, eUSARTC1, eUSARTD0, eUSARTD1, eUSARTE0, eUSARTF0
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};
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/*
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* USART_Init() Initialise hardware USARTs
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*
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* This routine configures the USARTs for selected baud rate, eight data bits,
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* no parity, one stop bit. It also enables the USARTs' transmitter and
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* receiver, and enables receive interrupts.
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*
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* This function also assigns stdin, stdout, and stderr to UART0 (see FILE
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* definitions below).
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*
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* Note that the arguments bauda and baudb must contain the actual
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* value to write to the USART's baud rate registers, NOT the desired baud
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* rate!
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*/
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void
USART_Init ( uint8_t usartnum, uint8_t bauda, uint8_t baudb );
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/*
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* USART_Connect() assign an USART to one of the standard I/O streams
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*
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* This routine associates a selected USART to one of the standard I/O streams.
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* The association is made using argument usartnum, which can range from 0 to
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* 7 and corresponds to the usart_ids enum above.
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*
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* Argument streamsel is one of the standard I/O stream identifiers (STDIN_FILENO,
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* STDOUT_FILENO, or STDERR_FILENO).
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*
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* After calling this routine, any standard I/O function, such as printf(), will
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* use the associated USART until the connection is changed with a later call
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* to this routine.
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*/
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void
USART_Connect (
int
usartnum,
int
streamsel );
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#endif
