参数资料
型号: MCP2515DM-PTPLS
厂商: Microchip Technology
文件页数: 26/92页
文件大小: 0K
描述: BOARD DAUGHTER PICTAIL MCP2515
标准包装: 1
系列: *
主要目的: 接口,CAN 控制器
嵌入式: 是,MCU,8 位
已用 IC / 零件: MCP2515,MCP2551
主要属性: 置于 PICtail Plus 子板内的 CAN 控制器和 CAN 收发器
已供物品: 板,CD
产品目录页面: 685 (CN2011-ZH PDF)
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MCP2515
FIGURE 4-3:
RECEIVE FLOW FLOWCHART
Start
No
Detect
Start of
Message?
Yes
Begin Loading Message into
Message Assembly Buffer (MAB)
Generate
Error
Frame
No
Valid
Message
Received?
Yes
Yes
Meets
a filter criteria
for RXB0?
No
Meets
a filter criteria
for RXB1?
Yes
No
Go to Start
Determines if the receive
register is empty and able
to accept a new message
Determines if RXB0 can roll
over into RXB1, if it is full.
Is
CANINTF.RX0IF = 0 ?
Yes
No
Is
RXB0CTRL.BUKT = 1 ?
No
Yes
Move message into RXB0
1
Set CANINTF.RX0IF =
Generate Overflow Error:
Set EFLG.RX0OVR
Generate Overflow Error:
Set EFLG.RX1OVR
No
Is
CANINTF.RX1IF = 0 ?
Yes
Is
Set RXB0CTRL.FILHIT <0>
according to which filter criteria
No
CANINTE.ERRIE = 1 ?
Move message into RXB1
Set CANINTF.RX1IF = 1
Yes
Generate
Interrupt on INT
Go to Start
Set RXB0CTRL.FILHIT <2:0>
according to which filter criteria
was met
CANINTE.RX0IE = 1 ?
No
Yes
RXB0
Generate
Interrupt on INT
Set CANSTAT <3:0> accord-
ing to which receive buffer
RXB1
Yes
CANINTE.RX1IE = 1 ?
No
the message was loaded into
Are
BFPCTRL.B0BFM = 1
and
BF1CTRL.B0BFE = 1 ?
Yes
Set RXBF0
Pin = 0
Set RXBF1
Pin = 0
Yes
Are
BFPCTRL.B1BFM = 1
and
BF1CTRL.B1BFE = 1 ?
DS21801G-page 26
No
No
? 2003-2012 Microchip Technology Inc.
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