Description: 1、程序目的：AT91SAM7A3的CAN功能验证与使用指导。
2、功能说明：该程序包括三个常用CAN功能的测试
1）、测试1:将CAN0 Mailbox 0中的数据传到CAN1 Mailbox 0中
2）、测试2:将CAN0 Mailbox 1和CAN0 Mailbox 2中的消息分别发送到
CAN1_MB15中(一个邮箱接收多个邮箱发来的信息)
3）、测试3: CAN0 Mailbox 3请求 CAN1 Mailbox 3 发送数据-1, procedures for the purpose of: AT91SAM7A3 the CAN functional verification and use of guidance. 2, function Description: The program consists of three commonly used CAN function tests 1), test 1: CAN0 Mailbox 0 data transmitted CAN1 Mailbox 0 in 2), test 2: CAN0 Mailbox 1 and CAN0 Mailbox 2 in the message sent to CAN1_MB15 respectively in (a mailbox to receive mail sent by a number of information) 3), test 3: CAN0 Mailbox 3 request CAN1 Mailbox 3 send data Platform: |
Size: 425984 |
Author:王建国 |
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Description: 1、程序目的：介绍AT91SAM7A3 SPI0的基本用法：
2、 功能说明: 利用SPI0接口读写外部DATAFLASH的数据-1, procedures Objective: To introduce the basic AT91SAM7A3 SPI0 Usage: 2, function Description: SPI0 use interface to read and write data from external DataFlash Platform: |
Size: 438272 |
Author:王建国 |
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Description: 程序说明：
一、开发环境
1、开发板：AT91SAM7X256 -EK
2、仿真器：SAM-ICE（ATMEL）
3、开发软件：IAR4_30A-1_2（IAR）
二、程序功能
1、程序目的：介绍AT91SAM7X256 PWC的基本用法：
2、 功能说明:
1）、通过PWC设置系统时钟
2）、通过PWC设置各外设时钟
3）、通过PWC的可编程外部时钟信号PCK0输出4.608M时钟
3）、进入空闲模式
三、开发板设置
1、依据AT91SAM7A3-EK使用向导,设置好开发板(最小系统).
2、在IAR环境下打开程序，运行。
用示波器观察PB20脚的波形。( PB20对应开发板J16 B 21脚或者S18--PB20)
3、其它PCK1-PCK3的设置可参照PCK0的设置。
4、按复位键可以将系统从空闲模式中唤醒，程序重新执行。
5、FIQ 中断将系统从空闲模式中唤醒。
用一根普通导线一端接地,另一端触碰 J16 A的30脚 , 可见LED2的状态改变
****注意：由于系统进入了空闲模式（LED不闪烁），再次调试时回无法进行，解决办法是按下复位按键在LED闪烁时（方法1:还未进入空闲模式时//////方法2:选择"忽略"即可）加载，调试程序。-Description of the procedures:
First, the development environment
1 development board: AT91SAM7X256-EK
2 emulator: SAM-ICE (ATMEL)
3, development of software: IAR4_30A-1_2 (IAR)
Second, the program features
1, the program aims: To introduce the basic usage AT91SAM7X256 PWC:
2, Function:
1), set the system clock through the PWC
2) Set the peripheral clock by PWC
3), by PWC external clock signal PCK0 programmable clock output 4.608M
3), enter the idle mode
Third, development board settings
1, according to AT91SAM7A3-EK using the wizard, set a good development board (minimum system).
2, in the IAR environment, open the program, run.
PB20 pin with an oscilloscope waveform. (PB20 corresponding development board J16 B 21 feet, or S18- PB20)
3, other PCK1-PCK3 settings can refer PCK0 settings.
4, press the reset button can wake the system from idle mode, the program re-run.
5, FIQ interrupt will wake the syst Platform: |
Size: 616448 |
Author:Tina |
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