{"id":3083,"date":"2011-03-27T19:28:26","date_gmt":"2011-03-27T23:28:26","guid":{"rendered":"https:\/\/example.com\/?postname=2-8%e2%80%b3-lcd-trouble"},"modified":"2011-03-27T19:28:26","modified_gmt":"2011-03-27T23:28:26","slug":"2-8%e2%80%b3-lcd-trouble","status":"publish","type":"post","link":"http:\/\/atomsofttech.com\/blog\/uncategorized\/2-8%e2%80%b3-lcd-trouble\/","title":{"rendered":"2.8\u2033 LCD trouble"},"content":{"rendered":"

Ok this is driving me nuts. I have been trying all day to get anything on these LCDs. Any color… anything!<\/p>\n

Ok my issue is this, i downloaded the example code which is intended for a ARM processor. I converted it for my PIC18F4620.<\/p>\n

The issue with converting it is, it was made for a 16bit interface and i have no clue on how to make it 8bit. I know from the datasheet there are 2 major pins.<\/p>\n

IM0 and IM3, it states:<\/p>\n

\"\"<\/a><\/p>\n

So i have IM0 to VCC and IM3 to GND for 8bit mode.<\/p>\n

Issue 2, in the datasheet i would expect to see examples on how to transfer data in 8bit mode… or well every mode, but ah nothing is there.<\/p>\n

So i have no clue if im even toggling the data correctly.<\/p>\n

This is original code for 16bit data transfer:<\/p>\n

void wr_cmd(u16 cmd)
\n{
\nA0_L;
\nCSTFT_L;
\nWRTFT_L;
\nSET_DATATFT(cmd);
\nWRTFT_H;
\nCSTFT_H;
\n}<\/p>\n

This is my code:<\/p>\n

void wr_cmd(unsigned int cmd)
\n{
\nRS = 0; \/\/Same as A0
\nCS=0;<\/p>\n

WR=0;
\nTFT_DATA = ((cmd>>8)&0xFF);
\nWR=1;<\/p>\n

WR=0;
\nTFT_DATA = (cmd&0xFF);
\nWR=1;<\/p>\n

CS=1;
\n}<\/p>\n

I am assuming that toggling the WR pin is how we send 2 bytes of data to represent 1 word.
\nBut the LCD doesnt seem to do anything.<\/p>\n

Can anyone help me out?<\/p>\n

Complete code so far: http:\/\/www.filedropper.com\/28lcd<\/p>\n","protected":false},"excerpt":{"rendered":"

Ok this is driving me nuts. I have been trying all day to get anything on these LCDs. Any color… anything! Ok my issue is this, i downloaded the example code which is intended for a ARM processor. I converted it for my PIC18F4620. The issue with converting it is, it was made for a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-3083","post","type-post","status-publish","format-standard","hentry"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/posts\/3083","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/comments?post=3083"}],"version-history":[{"count":0,"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/posts\/3083\/revisions"}],"wp:attachment":[{"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/media?parent=3083"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/categories?post=3083"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/tags?post=3083"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}