https://devzone.nordicsemi.com/f/nordic-q-a/22553/ili9325-drive-8-bit-interface-with-nrf51822I have this 2,4&quot; TFT Display with a IL9325 driver! I need to implement a 8bit 8080 Parallel interface. image description This is my 8 bit write function: // Write 8-bit value data lines void write8(uint8_t data) { nrf_gpio_pin_write(pinDataHolden-USTelligent Community 13Wed, 28 Dec 2022 22:05:28 GMThttps://devzone.nordicsemi.com/thread/402474?ContentTypeID=1Wed, 28 Dec 2022 22:05:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:689323bd-de76-4c44-815d-8b5caccd5974SL06<p>This post is old but for the next user... &nbsp; The above approach is technically correct . &nbsp;You have to put the CS and &nbsp;WR bytes low before sending the data to the TFT &nbsp;and high, after. &nbsp; Using NRF_GPIO &nbsp;OUTCLR &nbsp;and OUTSET is a better approch. &nbsp; They set selected pins of GPIO&nbsp;register in one&nbsp;command.</p> <p><strong></strong></p> <div> <div><span></span></div> <div><span></span></div> </div> <div> <div><span>uint8_t</span><span> data = </span><span>(</span><span>c &gt;&gt; </span><span>2</span><span>)</span><span> | </span><span>((</span><span>c &amp; 0b</span><span>00000011</span><span>)</span><span> &lt;&lt; </span><span>6</span><span>)</span><span>; &nbsp;// &nbsp;If needed, teorganise your &nbsp;bytes order corresponding to the TFT pin out if&nbsp;</span>need. Here is&nbsp;for pin D0.. D7 =&gt; Pin 19, 20, 13, 14, 15,16, 17,18 &nbsp;</div> <br /> <div><span> </span><span>NRF_GPIO</span><span>-&gt;</span><span>OUTCLR</span><span> = </span><span>(</span><span>0x</span><span>FF</span><span> &lt;&lt; </span><span>13</span><span>)</span><span>;</span><span> //Erase the region, OUTCLEAR Write: writing a &#39;1&#39; sets the pin low; writing a &#39;0&#39; has no effect</span></div> <div><span> </span><span>NRF_GPIO</span><span>-&gt;</span><span>OUTSET</span><span> = </span><span>(</span><span>data &lt;&lt; </span><span>13</span><span>)</span><span>; &nbsp;//Send data on selected pin, OUTSET&nbsp;Write: writing a &#39;1&#39; sets the pin high; writing a &#39;0&#39; has no effect</span></div> </div> <div></div><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/88737?ContentTypeID=1Tue, 06 Jun 2017 11:52:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7c4f3f51-dcbc-4685-a6c9-d6c4266a875ebjorn-spockeli<p>Well, does the pins you&#39;re writing to behave the way you expect them to?</p><div style="clear:both;"></div>