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| 型号： | DM163035 |
| 厂商： | Microchip Technology |
| 文件页数： | 44/96页 |
| 文件大小： | 0K |
| 描述： | KIT DEVELOPMENT PICDEM LAB |
| 标准包装： | 1 |
| 系列： | PICDEM™ |
| 类型： | MCU |
| 适用于相关产品： | PIC10F206，PIC16F690，PIC16F819 |
| 所含物品： | 板，线缆，元件，CD，PICkit 编程器 |
| 产品目录页面： | 659 (CN2011-ZH PDF) |
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PICDEM TM Lab Development Board User’s Guide
of uncorrected switch bounce can range from being just annoying to catastrophic. The
classic solution involves filtering, such as through a resistor-capacitor circuit, or through
resettable shift registers. These methods are still effective but they involve additional
cost in material, installation and board real estate. Debouncing in software eliminates
these additional costs.
One of the simplest ways to switch debounce is to sample the switch until the signal is
stable or continue to sample the signal until no more bounces are detected. How long
to continue sampling requires some investigation. However, 5 mS is usually adequate,
while still reacting fast enough that the user won't notice it.
FIGURE 3-19:
Global Variables:
MAIN() SOFTWARE CONTROL LOOP FLOWCHART FOR
LAB 5
main()
? 8-bit variable LED_Output will be used to
light the LEDs connected to PORTC
? 1-bit variable direction used to deter-
mine the direction of the sequential LED
Initialize()
flashing
0 = shift PORTC bits right-to-left
1 = shift PORTC bits left-to-right
Get_Inputs()
Decide()
Loop Forever
Do_Outputs()
Timing()
The Initialize() now configures the following:
? PORTC
- Configure PORTC pins as per the previous labs
? PORTA
- Clear PORTA register.
- Configure RA2 as a digital input pin
(see Registers 4-1 and 4-2 in Section 4.1 of the PIC16F690 Data Sheet).
? Timer0 will be configured to implement the 5mS delay as follows:
- Use the internal instruction clock F OSC /4 as the TMR0 clock source.
- Increment TMR0 on the low-to-high transition of F OSC /4.
- Assign the prescaler to TMR0 and configure 1:64.
? Initialize the LED_Output variable to ‘ 0 ’
? Initialize the direction bit variable to ‘ 0 ’
- This is a global variable that will be manipulated by the new Get_Inputs()
and used to determine PORTC shift direction by the Decide() .
DS41369A-page 40
? 2009 Microchip Technology Inc.
相关PDF资料 |
PDF描述 |
|---|---|
| DM164120-1 | BOARD DEMO PICKIT 2 LP COUNT |
| DM164120-3 | BOARD DEMO PICKIT2 28-PIN |
| DM164120-5 | BOARD DEMO PICKIT 2 64/80-PIN |
| DM164123 | KIT MANAGEMENT SYSTEM PICDEM |
| DM180021 | KIT STARTER MPLAB FOR PIC18F MCU |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DM163035+TEFLCST3 | 制造商:Microchip Technology Inc 功能描述:KIT PICDEMLAB+FLOWCODE-HOME BUNDLE/ 制造商:Microchip Technology Inc 功能描述:PICDEM, FLOW CODE, LAB, DEV KIT |
| DM163045 | 功能描述:开发板和工具包 - PIC / DSPIC PICDEM Lab Dev Kit (with PICkit 3) 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: |
| DM1-63-C | 功能描述:端子 Metric Fem Disc non-insulated RoHS:否 制造商:AVX 产品:Junction Box - Wire to Wire 系列:9826 线规:26-18 接线柱/接头大小: 绝缘: 颜色:Red 型式:Female 触点电镀:Tin over Nickel 触点材料:Beryllium Copper, Phosphor Bronze 端接类型:Crimp |
| DM1-63M-C | 功能描述:端子 Metric Male Disc non-insulated, 0 RoHS:否 制造商:AVX 产品:Junction Box - Wire to Wire 系列:9826 线规:26-18 接线柱/接头大小: 绝缘: 颜色:Red 型式:Female 触点电镀:Tin over Nickel 触点材料:Beryllium Copper, Phosphor Bronze 端接类型:Crimp |
| DM164 | 制造商:SITI 制造商全称:SITI 功能描述:8x3-CHANNEL CONSTANT CURRENT LED DRIVER |
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