Date: Wed, 10 Apr 2019 11:19:12 +0300 From: Daniel Braniss <danny@cs.huji.ac.il> To: Oleksandr Tymoshenko <gonzo@bluezbox.com> Cc: Emmanuel Vadot <manu@bidouilliste.com>, "freebsd-arm@freebsd.org" <arm@freebsd.org> Subject: Re: i2c still not working for me Message-ID: <FCA4E00E-455A-46BF-AD78-E20E1E997BFC@cs.huji.ac.il> In-Reply-To: <20190409171604.GA4581@bluezbox.com> References: <12F641C3-9FAA-4A3A-BA18-A7302F3A0F5E@cs.huji.ac.il> <20190409095819.c560dbc156c46e5ca0244e3e@bidouilliste.com> <23A47048-642A-481C-B7BE-B61E55F82955@cs.huji.ac.il> <20190409171604.GA4581@bluezbox.com>
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> On 9 Apr 2019, at 20:16, Oleksandr Tymoshenko <gonzo@bluezbox.com> = wrote: >=20 > Daniel Braniss (danny@cs.huji.ac.il <mailto:danny@cs.huji.ac.il>) = wrote: >>=20 >>=20 >>> 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 >>=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 >=20 > Sample code for TMP102 sensor that uses RDWR ioctl: >=20 > = https://github.com/gonzoua/freebsd-embedded-demos/blob/master/libtmp102/tm= p102.c = <https://github.com/gonzoua/freebsd-embedded-demos/blob/master/libtmp102/t= mp102.c> thanks gonzo! I already got to talk to the PN533, so the iic driver is now working, now for some more coding (the pn533 is a bit more complicated than the = thermal chip :-) thanks, danny >=20 >=20 > --=20 > gonzo
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