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Hi, Im Using as RFID Reader https://www.waveshare.com/pn532-nfc-hat.htm and as soundcard an WM8960 https://www.berrybase.de/raspberry-pi/raspberry-pi-computer/gpio-hats-phats/audio/wm8960-hi-fi-stereo-sound-hat-f-252-r-raspberry-pi?sPartner=g_shopping&gclid=EAIaIQobChMIgc6e4uTA9AIVGKd3Ch3XRg-0EAQYASABEgLLzvD_BwE. After boot i try by i2cdetect -y 1 to see, if both devices are detected. I got the answer, pi@PhonieBoxSonja:~ $ i2cdetect -y 1 so both devices are detected, but not at the same time. UU means, that the devices (her the sound card) has been resevered by a kernel driver. This makes sence, because of the Soundcard and its kernel drivers. But why can't I'm getting in to run at the same time? Could there be a problem because of placed pullups? The circuit diagram of the WM8960 is showing, that there is no pullup used, but the interface if the ic is running on 3,3V, for the PN532 hat is no ciruit diagram available. Do you have an additional point to mention and to look at? Are the devices are running, although one of it is not displayed in the export? Greetings |
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There is an Bug in the Dokumentation: i2cdetect -y 1 |
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There is an Bug in the Dokumentation:
You have to disconnect INT0 and RSTPIN. and then you'll find also the PN532 NFC HAT.
i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- 1a -- -- -- -- --
20: -- -- -- -- 24 -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --