From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from qmail34.e-mind.com ([188.94.192.34] helo=qmail.e-mind.com) by bombadil.infradead.org with smtp (Exim 4.87 #1 (Red Hat Linux)) id 1dJEOE-00066f-Cg for barebox@lists.infradead.org; Fri, 09 Jun 2017 07:31:33 +0000 References: <5caded00-8ec7-f66e-0922-11d32f719081@eurekelettronica.it> <20170609061505.3tnirp55o5rfpbra@pengutronix.de> <8b1cafb3-8e87-8ce8-e4e1-42d28f82d1b0@eurekelettronica.it> From: gianluca Message-ID: Date: Fri, 9 Jun 2017 09:31:05 +0200 MIME-Version: 1.0 In-Reply-To: <8b1cafb3-8e87-8ce8-e4e1-42d28f82d1b0@eurekelettronica.it> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: New Board i.MX6 Dual Lite based To: Sascha Hauer Cc: barebox@lists.infradead.org On 06/09/2017 09:25 AM, gianluca wrote: > >>>> i2c0: timeout waiting for I2C bus busy >>>> ek360_read_eeprom :Error on reading eeprom @ 0 >>>> ek360_read_eeprom :Error on reading bytes. >>>> ek360_detect_hw :** ERROR on READ EEPROM BOARD ret: -1 >>>> Hit CTRL-C key to stop autoboot: 1 >>> >>> Another issue is the i2c bus. >> >> You should measure the I2C data line with an oscilloscope. It could be >> that the line is constantly low. This can happen if the pullup resistor >> is missing (Pinmux?). Also in rare cases this can happen when a board is >> resetted in the middle of a I2C transfer. >> > > Now I am trying to extend the I2C Lines outside the board for a > oscilloscope and/or a Saleae Logic Bus Analyzer. As soon as I find the > solution or not I will keep you informed. > > Anyway in the config there is both GPIO BASED I2C DRIVER and Platform > iMX Driver. I tried to disable the GPIO Based but it does not work. > > Now I am thinking about some pulled-low/high line by some chips in the > board. I will see. > Due to an inversion on mounting the i2c eeprom all i2c chips are mulfunctioning, so I am trying to uses another board. Now it works. Good! Thank you for everything. -- Eurek s.r.l. | Electronic Engineering | http://www.eurek.it via Celletta 8/B, 40026 Imola, Italy | Phone: +39-(0)542-609120 p.iva 00690621206 - c.f. 04020030377 | Fax: +39-(0)542-609212 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox