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en:c1_hardware_adc [2015/03/01 16:30] odroid |
en:c1_hardware_adc [2015/03/01 16:30] (current) odroid |
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| + | There 2 ADC input ports on the 40-pin header.\\ | ||
| + | ADC.AIN0 : Pin #40\\ | ||
| + | ADC.AIN1 : Pin #37\\ | ||
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| + | |||
| + | You can access the ADC inputs via sysfs nodes. | ||
| + | <code> | ||
| + | /sys/class/saradc/saradc_ch0 | ||
| + | /sys/class/saradc/saradc_ch1 | ||
| + | </code> | ||
| + | |||
| + | ADC's maximum sample rate is 50kSPS with 10bit resolution (0~1023).\\ | ||
| + | But the actual sample rate is 8kSPS if you access it via sysfs due to the limited file IO speed. | ||
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| + | The ADC inputs are limited to 1.8Volt. | ||
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| + | This WiringPi example code shows how to access the ADC for C/C++ programming.\\ | ||
| + | [[en:c1_tinkering|Introduction C Tinkering Kit on Ubuntu]] | ||
| + | |||
| + | Library Source code | ||
| + | [[https://github.com/hardkernel/wiringPi/blob/master/wiringPi/wiringPi.c|WiringPi port for ODROID-C1]] | ||
