tiger9637

入驻于 2020-05-21 / MAKE 主页

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MCC118采集数值波动

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回复了 tiger9637 创建的主题 技术支持 / MCC118采集数值波动
2020-05-21

谢谢,看来是接触问题,插入拧紧后显示正常了

pi@raspberrypi:~/daqhats/examples/c/mcc118/single_value_read $ ./single_value_read

MCC 118 single data value read example
Function demonstrated: mcc118_a_in_read
Channels: 0 - 3
Options: OPTS_DEFAULT

Press 'Enter' to continue

Acquiring data ... Press 'Enter' to abort

Samples/Channel Channel 0 Channel 1 Channel 2 Channel 3
166 4.97113 V 1.74062 V 1.74109 V 1.74678 V


pi@raspberrypi:~/daqhats/examples/c/mcc118/single_value_read $ ./single_value_read

MCC 118 single data value read example
Function demonstrated: mcc118_a_in_read
Channels: 0 - 3
Options: OPTS_DEFAULT

Press 'Enter' to continue

Acquiring data ... Press 'Enter' to abort

Samples/Channel Channel 0 Channel 1 Channel 2 Channel 3
275 3.31255 V 1.74062 V 1.74109 V 1.74167 V


pi@raspberrypi:~/daqhats/examples/c/mcc118/single_value_read $ ./single_value_read

MCC 118 single data value read example
Function demonstrated: mcc118_a_in_read
Channels: 0 - 3
Options: OPTS_DEFAULT

Press 'Enter' to continue

Acquiring data ... Press 'Enter' to abort

Samples/Channel Channel 0 Channel 1 Channel 2 Channel 3
304 -0.00460 V 1.74062 V 1.74109 V 1.74678 V

回复了 tiger9637 创建的主题 技术支持 / MCC118采集数值波动
2020-05-21

刚升级了固件,没什么改善。
pi@raspberrypi:~/daqhats/tools $ ./mcc118_firmware_update 0 ~/daqhats/tools/MCC_118.hex
Checking versions...
Hex file firmware version 1.03
Device firmware version 1.01
Do you want to continue? Press Y to continue, any other key to exit. > y
Erasing...done
Writing...done
Verifying...done
Starting firmware...done
Checking device...firmware version 1.03

-----------------------------------------

pi@raspberrypi:~/daqhats/examples/c/mcc118/single_value_read $ ./single_value_read

MCC 118 single data value read example
Function demonstrated: mcc118_a_in_read
Channels: 0 - 3
Options: OPTS_DEFAULT

Press 'Enter' to continue

Acquiring data ... Press 'Enter' to abort

Samples/Channel Channel 0 Channel 1 Channel 2 Channel 3
283 1.74047 V 1.74062 V 1.74109 V 1.74167 V

刚买了MCC118,配置完毕,不连接任何接线,空载,用示例里的single_value_read读取数据,显示值始终为~1.74V。
如果将CH0等接树莓派IO引脚上的5V、0V,也没有任何变化。
请问这是什么问题?

MCC 118 single data value read example
Function demonstrated: mcc118_a_in_read
Channels: 0 - 3
Options: OPTS_DEFAULT

Press 'Enter' to continue

Acquiring data ... Press 'Enter' to abort

Samples/Channel Channel 0 Channel 1 Channel 2 Channel 3
1132 1.74047 V 1.74062 V 1.74109 V 1.74167 V