i.MX ProcessorsのトピックRe: Problem with interfacing SPI device with wandboard dual https://community.nxp.com/t5/i-MX-Processors/Problem-with-interfacing-SPI-device-with-wandboard-dual/m-p/662072#M101659 <HTML><HEAD></HEAD><BODY><P>Hi ARAVIND</P><P></P><P>lcd-st7565 driver should be integrated in linux framebuffer framework,</P><P>please follow&nbsp; eLCDIF driver example described in Chapter 12 ELCDIF Frame Buffer Driver</P><P>attached Linux Manual. For debug testing one can use sect.6.4.1 Framebuffer Tests</P><P></P><P>Best regards<BR />igor<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Fri, 06 Jan 2017 03:48:10 GMT igorpadykov 2017-01-06T03:48:10Z Problem with interfacing SPI device with wandboard dual https://community.nxp.com/t5/i-MX-Processors/Problem-with-interfacing-SPI-device-with-wandboard-dual/m-p/662071#M101658 <HTML><HEAD></HEAD><BODY><P>Hi,<BR />I'm using imx6 wandboard dual tried to configure spi1,</P><P>made device-tree changes:</P><P>-----------------------------------------------<BR />...<BR />&amp;iomuxc {<BR />...<BR />&nbsp;&nbsp;&nbsp; ecspi1 {<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pinctrl_ecspi1_cs: ecspi1cs {<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; fsl,pins = &lt;<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MX6QDL_PAD_EIM_EB2__ECSPI1_SS0&nbsp; 0x80000000<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &gt;;<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; };<BR />&nbsp;pinctrl_ecspi1: ecspi1grp {<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; fsl,pins = &lt;<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MX6QDL_PAD_EIM_D17__ECSPI1_MISO 0x100b1<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MX6QDL_PAD_EIM_D18__ECSPI1_MOSI 0x100b1<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MX6QDL_PAD_EIM_D16__ECSPI1_SCLK 0x100b1<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &gt;;<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; };<BR />&nbsp;&nbsp;&nbsp; };<BR />...</P><P>...<BR />&amp;ecspi1 {<BR />&nbsp;&nbsp;&nbsp; fsl,spi-num-chipselects = &lt;1&gt;;<BR />&nbsp;&nbsp;&nbsp; pinctrl-names = "default";<BR />&nbsp;&nbsp;&nbsp; pinctrl-0 = &lt;&amp;pinctrl_ecspi1 &amp;pinctrl_ecspi1_cs&gt;;<BR />&nbsp;&nbsp;&nbsp; status = "okay";<BR />&nbsp;&nbsp;&nbsp; spidev@0x01 {<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; compatible = "linux,lcd-st7565";<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; spi-max-frequency = &lt;20000000&gt;;<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; reg = &lt;0x0&gt;;<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; register-sel-gpio =&lt;&amp;gpio4 5 0&gt;;<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; reset-gpio =&lt;&amp;gpio7 13 0&gt;;<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; backlight-gpio =&lt;&amp;gpio3 26 0&gt;;<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; status = "okay";<BR />&nbsp;&nbsp;&nbsp; };<BR />};<BR />...<BR />----------------------------------------------------------------</P><P>but while connecting the LCD to the SPI, its not working (lcd-st7565 driver for my LCD, which is working fine as i get all debug prints)on probing the SPI pins with oscilloscope confirmed data is coming but in some distorted manner (overshoot undershoot problem), </P><P>&nbsp;</P><P>kernel version 3.14.28</P><P>oscilloscope probed&nbsp; : data line and clock<BR />can anyone please guide me what is the reason for such a behavior..??</P></BODY></HTML> Thu, 05 Jan 2017 06:34:07 GMT https://community.nxp.com/t5/i-MX-Processors/Problem-with-interfacing-SPI-device-with-wandboard-dual/m-p/662071#M101658 aravinds 2017-01-05T06:34:07Z Re: Problem with interfacing SPI device with wandboard dual https://community.nxp.com/t5/i-MX-Processors/Problem-with-interfacing-SPI-device-with-wandboard-dual/m-p/662072#M101659 <HTML><HEAD></HEAD><BODY><P>Hi ARAVIND</P><P></P><P>lcd-st7565 driver should be integrated in linux framebuffer framework,</P><P>please follow&nbsp; eLCDIF driver example described in Chapter 12 ELCDIF Frame Buffer Driver</P><P>attached Linux Manual. For debug testing one can use sect.6.4.1 Framebuffer Tests</P><P></P><P>Best regards<BR />igor<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Fri, 06 Jan 2017 03:48:10 GMT https://community.nxp.com/t5/i-MX-Processors/Problem-with-interfacing-SPI-device-with-wandboard-dual/m-p/662072#M101659 igorpadykov 2017-01-06T03:48:10Z