Date: Tue, 9 Apr 2019 09:58:19 +0200 From: Emmanuel Vadot <manu@bidouilliste.com> To: Daniel Braniss <danny@cs.huji.ac.il> Cc: "freebsd-arm@freebsd.org" <arm@freebsd.org> Subject: Re: i2c still not working for me Message-ID: <20190409095819.c560dbc156c46e5ca0244e3e@bidouilliste.com> In-Reply-To: <12F641C3-9FAA-4A3A-BA18-A7302F3A0F5E@cs.huji.ac.il> References: <12F641C3-9FAA-4A3A-BA18-A7302F3A0F5E@cs.huji.ac.il>
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On Tue, 9 Apr 2019 10:50:22 +0300 Daniel Braniss <danny@cs.huji.ac.il> wrote: > 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 m= ethod. > 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 meantim= e 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 Based on the function names you are using directly stop/start/etc ... My changes were only for i2c_transfer (I2CRDWR ioctls) --=20 Emmanuel Vadot <manu@bidouilliste.com> <manu@freebsd.org>
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