| 基于ADS7846的四线电阻式触屏接口设计 |
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| 引用本文： | 吴爽,赵永滨. 基于ADS7846的四线电阻式触屏接口设计[J]. 兵工自动化, 2010, 29(8): 43-45. DOI: 10.3969/j.issn.1006-1576.2010.08.014 |
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| 作者姓名： | 吴爽 赵永滨 |
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| 作者单位： | 中国兵器工业第五八研究所,军品部,四川,绵阳,621000;中国兵器工业第五八研究所,军品部,四川,绵阳,621000 |
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| 摘 要： | 针对触摸屏AD采样在实际应用中采样易受干扰、测量值偏差较大等常见问题,给出一种基于ADS784的四线电阻式触摸屏接口电路设计。该接口电路由ADS7846实现对触屏数据的采样;由C8051F320的SPI串口产生对ADS7846的测量命令发送和测量数据读取。并以该接口电路在触摸屏系统中的一个实际应用为例,分析接口电路的常见问题并提出相应的解决方案。实际应用结果表明,该设计合理可行。
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| 关 键 词： | ADS7846 C8051F320 四线电阻式触摸屏 AD采样 |
| 收稿时间： | 2010-10-21 |
Design of 4-Wire Touch Screen Interface Based on ADS7846 |
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| Wu Shuang,Zhao Yongbin. Design of 4-Wire Touch Screen Interface Based on ADS7846[J]. Ordnance Industry Automation, 2010, 29(8): 43-45. DOI: 10.3969/j.issn.1006-1576.2010.08.014 |
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| Authors: | Wu Shuang Zhao Yongbin |
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| Affiliation: | Wu Shuang,Zhao Yongbin(Dept.of Armament Product,No.58 Research Institute of China Ordnance Industries,Mianyang 621000,China) |
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| Abstract: | A design of 4-wire touch screen interface based on ADS7846 is proposed,in order to solve the problem that the analog to digital sample of touch screen is easily interfered and reduce the error of measured value.The interface circuit sample the data of touch screen by ADS7846,and the SPI of C8051F320 carried out measure command and measure data transfer to ADS7846.By taking the application of the interface circuit in touch screen an example,analyze the problems of interface circuit then find a solution to those.The actual application shows that the design is reasonable. |
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| Keywords: | ADS7846 C8051F320 |
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