Date: Tue, 9 Apr 2019 11:04:23 +0300 From: Daniel Braniss <danny@cs.huji.ac.il> To: Emmanuel Vadot <manu@bidouilliste.com> Cc: "freebsd-arm@freebsd.org" <arm@freebsd.org> Subject: Re: i2c still not working for me Message-ID: <23A47048-642A-481C-B7BE-B61E55F82955@cs.huji.ac.il> In-Reply-To: <20190409095819.c560dbc156c46e5ca0244e3e@bidouilliste.com> References: <12F641C3-9FAA-4A3A-BA18-A7302F3A0F5E@cs.huji.ac.il> <20190409095819.c560dbc156c46e5ca0244e3e@bidouilliste.com>
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> On 9 Apr 2019, at 10:58, Emmanuel Vadot <manu@bidouilliste.com> wrote: >=20 > On Tue, 9 Apr 2019 10:50:22 +0300 > Daniel Braniss <danny@cs.huji.ac.il> wrote: >=20 >> Hi, >> after the latest changes to i2c there is a small improvement, >> i2c -s finds the device but complains: >>=20 >> root@neo-14:~ # i2c -s >> Hardware may not support START/STOP scanning; trying less-reliable = read method. >> Scanning I2C devices on /dev/iic0: 24 >>=20 >> but nothing else works. >>=20 >> I?ll try and connect my saleae signal analyzer later, but in the = meantime this is what I get >> on the console: >> [?] >> iichb0: twsi_control_clear: read val=3D58 >> iichb0: twsi_control_clear: write val=3D40 >> iichb0: TWSI_WRITE: Writing 40 to c >> iichb0: twsi_start: twsi_start: slave=3D48 >> iichb0: twsi_locked_start: send start >> iichb0: TWSI_READ: read 58 from c >> iichb0: twsi_control_set: read val=3D58 >> iichb0: twsi_control_set: write val=3D68 >> iichb0: TWSI_WRITE: Writing 68 to c >> iichb0: twsi_poll_ctrl: Waiting for ctrl r. >> eg to match mask 8 >> iichb0: TWSI_READ: read 48 from c >> gic0: iichb0: Spurious interrupt detected: last irq: 32 on CPU1 >> twsi_poll_ctrl: done >> gic0: iichb0: Spurious interrupt detected: last irq: 32 on CPU1 >> TWSI_READ: read 8 from 10 >> iichb0: twsi_locked_start: status=3D8 >> iichb0: TWSI_WRITE: Writing 48 to 8 >> gic0: Spurious interrupt detected: last irq: 32 on CPU1 >> iichb0: TWSI_READ: read 48 from c >> gic0: iichb0: Spurious interrupt detected: last irq: 32 on CPU1 >> twsi_control_clear: read val=3D48 >> gic0: iichb0: Spurious interrupt detected: last irq: 32 on CPU1 >> twsi_control_clear: write val=3D40 >> gic0: iichb0: Spurious interrupt detected: last irq: 32 on CPU1 >> TWSI_WRITE: Writing 40 to c >> gic0: Spurious interrupt detected: last irq: 32 on CPU1 >> iichb0: twsi_poll_ctrl: Waiting for ctrl reg to match mask 8 >> gic0: iichb0: Spurious interrupt detected: last irq: 32 on CPU1 >> TWSI_READ: read 48 from c >> iichb0: twsi_poll_ctrl: done >> iichb0: TWSI_READ: read 8 from 10 >> iichb0: twsi_locked_start: no ACK (status: 08) after sending slave = address >> gic0: iichb0: Spurious interrupt detected: last irq: 32 on CPU1 >> twsi_stop: twsi_stop >> [?] >>=20 >> BTW, the hardware is NanoPi-neo and it?s running Current 345984 >>=20 >> thanks, >> danny >>=20 >=20 > Based on the function names you are using directly stop/start/etc ... > My changes were only for i2c_transfer (I2CRDWR ioctls) >=20 ok, this will show my ignorance, but could you send me some sample code = that uses I2CRDWR? btw, the device i=E2=80=99m trying out is an RFID reader pn533, which = works with a modified driver =E2=80=A6 thanks, danny > --=20 > Emmanuel Vadot <manu@bidouilliste.com> <manu@freebsd.org>
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