PIC18F8585T-I/PT【PDF 205/424 页】IC PIC MCU FLASH 24KX16 80TQFP

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录3881

201页 202页 203页 204页 [205页]206页 207页 208页 209页

2004 Microchip Technology Inc.

DS30491C-page 281

PIC18F6585/8585/6680/8680

EXAMPLE 23-1:

CHANGING TO CONFIGURATION MODE

EXAMPLE 23-2:

WIN AND ICODE BITS USAGE IN INTERRUPT SERVICE ROUTINE TO ACCESS

TX/RX BUFFERS

; Request Configuration mode.

MOVLW

B’10000000’

; Set to Configuration Mode.

MOVWF

CANCON

; A request to switch to Configuration mode may not be immediately honored.

; Module will wait for CAN bus to be idle before switching to Configuration Mode.

; Request for other modes such as Loopback, Disable etc. may be honored immediately.

; It is always good practice to wait and verify before continuing.

ConfigWait:

MOVF

CANSTAT, W

; Read current mode state.

ANDLW

B’10000000’

; Interested in OPMODE bits only.

TSTFSZ

WREG

; Is it Configuration mode yet?

BRA

ConfigWait

; No. Continue to wait...

; Module is in Configuration mode now.

; Modify configuration registers as required.

; Switch back to Normal mode to be able to communicate.

; Save application required context.

; Poll interrupt flags and determine source of interrupt

; This was found to be CAN interrupt

; TempCANCON and TempCANSTAT are variables defined in Access Bank low

MOVFF

CANCON, TempCANCON

; Save CANCON.WIN bits

; This is required to prevent CANCON

; from corrupting CAN buffer access

; in-progress while this interrupt

; occurred

MOVFF

CANSTAT, TempCANSTAT

; Save CANSTAT register

; This is required to make sure that

; we use same CANSTAT value rather

; than one changed by another CAN

; interrupt.

MOVF

TempCANSTAT, W

; Retrieve ICODE bits

ANDLW

B’00001110’

ADDWF

PCL, F

; Perform computed GOTO

; to corresponding interrupt cause

BRA

NoInterrupt

; 000 = No interrupt

BRA

ErrorInterrupt

; 001 = Error interrupt

BRA

TXB2Interrupt

; 010 = TXB2 interrupt

BRA

TXB1Interrupt

; 011 = TXB1 interrupt

BRA

TXB0Interrupt

; 100 = TXB0 interrupt

BRA

RXB1Interrupt

; 101 = RXB1 interrupt

BRA

RXB0Interrupt

; 110 = RXB0 interrupt

; 111 = Wake-up on interrupt

WakeupInterrupt

BCF

PIR3, WAKIF

; Clear the interrupt flag

;

; User code to handle wake-up procedure

;

; Continue checking for other interrupt source or return from here

…

NoInterrupt

…

; PC should never vector here. User may

; place a trap such as infinite loop or pin/port

; indication to catch this error.

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式