实战九、单通道模拟量采集器（Actual nine and single channel analog sampler）.docVIP

下载本文档

1
0
约 7页
2017-07-24 发布于河南
举报
版权申诉

实战九、单通道模拟量采集器（Actual nine and single channel analog sampler）.doc

1、本文档共7页，可阅读全部内容。
2、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
5、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
6、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
7、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
8、VIP文档为合作方或网友上传，每下载1次，网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档

实战九、单通道模拟量采集器（Actual nine and single channel analog sampler）

实战九、单通道模拟量采集器（Actual nine and single channel analog sampler） The purpose of this fight is to make you familiar with the function of ADC module and the method of AD conversion Project implementation: from the chip RA0 input a can be changed at any time analog (by adjusting the DEMO board VR1) Then, the microcontroller will be able to simulate the number of analog / digital conversion in a timely manner and display it with LED. We can see the conversion result It changes with the amount of analog so that we can understand the work of the on-chip ADC module. The software design idea of this example: using the chip hardware resource TMR0 and prescaler to provide the timing start signal for ADC. however Instead of using the interrupt function, the software query method is adopted, and the result is left justified. Ignoring the minimum 2 bits will The 10 bit AD is used as the 8 bit, and the A/D conversion clock source uses 8 times the system cycle. This example does not require high voltage reference for the ADC We chose the power supply voltage VDD and VSS as the reference voltage, whether the A/D conversion process was completed or not, and did not use the interrupt function of the ADC module Instead, query the interrupt flag bits ADIF in software. The analog channel used in this example is AN0. The program file name MCD-AD1.ASM The procedure list is as follows: ************************************; LIST P=16F877; list pseudo instruction INCLUDE P16F877.INC; contains the inclusion file into the source ORG 0000H NOP; place an empty operation command for ICD segments START BANKSEL PORTC; select the same body as the PORTC register CLRF PORTC; clear PORTC MOVLW B010000001: Select: clock clock source is FOSC/8, allowing ADC to work MOVWF ADCON0; channel AN0; the conversion process is not started for the time being BANKSEL OPTION_REG; the body of the select register OPTION_REG is the current body MOVLW setting: RB port does not need pull-up; divider is allocated to