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参数资料
| 型号： | DM240002 |
| 厂商： | Microchip Technology |
| 文件页数： | 19/42页 |
| 文件大小： | 0K |
| 描述： | BOARD DEV EXPLORER 16 44-PIN |
| 标准包装： | 1 |
| 系列： | Explorer 16 44 引脚 |
| 类型： | MCU |
| 适用于相关产品： | dsPIC30，dsPIC33，PIC32，PIC24FJ，PIC24HJ |
| 所含物品： | Explorer 16 开发板，PIC24FJ64GA004 和 dsPIC33FJ32GP204 PIM 模块 |
| 产品目录页面： | 659 (CN2011-ZH PDF) |
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44-Pin Demo Board Lessons
For more information, refer to the I/O Ports section of the PIC16F882/883/884/886/887
Data Sheet (DS41291).
3.2.2
Blink (Delay Loop)
The first lesson showed how to turn on a LED, this lesson shows how to make it blink.
While this might seem a trivial change from Lesson 1, it gives a context to explore
several more instructions.
New Instructions
CLRF
INCF
DECF
INCFSZ
DECFSZ
GOTO
EXAMPLE 3-2:
Loop
Clear file register
Increment file register
Decrement file register
Increment file register, Skip next instruction if zero
Decrement file register, Skip next instruction if zero
Jump to a new location in the program
PICKIT 2, LESSON 2: BLINK
BSF
BCF
GOTO
PORTD,0
PORTD,0
Loop
;turn on LED D0
;turn off LED D0
;do it again
While adding a BCF instruction and making it loop will make it blink. It will blink so fast
you won’t see it, it will only look dim. That loop requires 4 instruction times to execute.
The first instruction turns it on. The second one turns it off. The GOTO takes two instruc-
tion times, which means it will be on for 25% of the time.
As configured, the PIC ? microcontroller executes 1 million instructions per second. At
this rate, the blinking needs to be slowed down so that the blinking can be seen, which
can be done by using a delay loop.
Note:
? 2007 Microchip Technology Inc.
Counting cycles – Relating clock speed to instruction speed. The processor
requires 4 clocks to execute an instruction. Since the internal oscillator as
used in these lessons runs at 4 MHz, the instruction rate is 1 MHz.
DS41296B-page 15
相关PDF资料 |
PDF描述 |
|---|---|
| DM240011 | KIT STARTER MPLAB FOR PIC24F MCU |
| DM240021 | KIT STARTER MPLAB FOR PIC24H |
| DM240311 | BOARD DEV PIC24F16KA102 XLP |
| DM300018 | BOARD DEMO DSPICDEM 2 |
| DM300019 | BOARD DEMO DSPICDEM 80L STARTER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DM240002 | 制造商:Microchip Technology Inc 功能描述:Explorer 16 kit(44-PIN) w/ PIC24FJ64GA00 |
| DM240011 | 功能描述:开发板和工具包 - PIC / DSPIC MPLAB Starter Kit for PIC24F MCU RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
| DM240012 | 功能描述:开发板和工具包 - PIC / DSPIC PIC24E USB Starter Kit RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
| DM240013-1 | 功能描述:开发板和工具包 - PIC / DSPIC Microstick for 3V PIC24F K-series RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
| DM240013-2 | 功能描述:开发板和工具包 - PIC / DSPIC RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
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