init_uart2.s

该文件包含30F的电机控制程序

;START_HEADER
;
; dsPIC30F6014 Demo Source File
; (c) Copyright 2005 Microchip Technology, All rights reserved
;
; --------------------------------------------------------------------------
; File Revision History:
; --------------------------------------------------------------------------
;
; $Log: init_uart2.s,v $
; Revision 1.3  2005/04/04 23:44:13  VasukiH
; Updates to comments in file header
;
; Revision 1.2  2005/04/04 23:15:45  VasukiH
; Updates for MPLAB C30 v1.30 compatiblity
;
; Revision 1.1.1.1  2003/08/23 00:38:32  VasukiH
; First import of demo source into CVS Repository
;
;
;
; --------------------------------------------------------------------------
;
; Software and Development Tools Info:
; --------------------------------------------------------------------------
; Tool                          Version
; --------------------------------------------------------------------------
; MPLAB IDE                     7.0
; MPLAB C30 Toolsuite           1.30
; dsPICDEM(TM) Processor Board  1.10
; --------------------------------------------------------------------------
;
; File Notes:
; 1. Sets up UART2 to receive and transmit at 57600 baud
; 2. UART2 Txmit is used to refresh a data display on the Host PC
;     HyperTerminal session window.
; 3. UART2 Rcv is used to accept numeric entries from a PC Keyboard. The input
;    is used to generate DTMF tones output to the codec, via the DCI module.
;
;END_HEADER


.include "p30fxxxx.inc"


.section .text
.global _init_uart2
_init_uart2:

;Initialize and Enable UART1 for Tx and Rx
        clr     U2MODE                              ;Set SFRs to a known state
        clr     U2STA
        bclr    U2STA, #URXISEL1
        bclr    U2STA, #URXISEL0

        bclr    IFS1, #U2RXIF
        bset    IEC1, #U2RXIE                       ;Enable Rx ISR processing

        bset    U2MODE, #UARTEN                     ;Enable UART
        mov     #(((7372800/57600) / 16) - 1), W0   ;Initialize Baud rate
        mov     w0, U2BRG                           ;to 57.6 Kbaud

        bclr    IFS1, #U2TXIF                       ;Enable Txmit ISR processing
        bset    IEC1, #U2TXIE

        bset    U2STA, #UTXISEL
        bset    U2STA, #UTXEN                       ;Enable Transmission
        return


.end