LPC Microcontrollers中的主题 LPC1788/144 LCD controller and external SRAM https://community.nxp.com/t5/LPC-Microcontrollers/LPC1788-144-LCD-controller-and-external-SRAM/m-p/524401#M7037 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by Pacman on Thu Jun 12 14:10:44 MST 2014</STRONG><BR /><SPAN>I'm trying to connect the 144 pin LPC1788 to a LCD display, which is 480 x 272 pixels.</SPAN><BR /><SPAN>The required resolution is 16 bit, so that makes 480 x 272 x 2 Bytes = 261120 Bytes = 255 KB.</SPAN><BR /><SPAN>So I connected a 512K x 8 bit SRAM, but I have address lines A0 to A15 and A23 to A24 available.</SPAN><BR /><SPAN>As I have only D0 to D7 available, it means I </SPAN><I><STRONG>must</STRONG></I><SPAN> use byte-access.</SPAN><BR /><SPAN>That sums up to 4 blocks of 64K each.</SPAN><BR /><BR /><SPAN>As I see it, it's not really possible to use the LCD display I have available, unless there's something I didn't think of.</SPAN><BR /><BR /><SPAN>The problem is that the LCD controller's scan-line address (as far as I understand) cannot be corrected until it reaches the end of the frame. Eg. changing the line address in a HBL interrupt will not have the desired effect.</SPAN><BR /><BR /><SPAN>Does anyone have a solution, hint, idea or suggestion ?</SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 18:06:00 GMT lpcware 2016-06-15T18:06:00Z LPC1788/144 LCD controller and external SRAM https://community.nxp.com/t5/LPC-Microcontrollers/LPC1788-144-LCD-controller-and-external-SRAM/m-p/524401#M7037 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by Pacman on Thu Jun 12 14:10:44 MST 2014</STRONG><BR /><SPAN>I'm trying to connect the 144 pin LPC1788 to a LCD display, which is 480 x 272 pixels.</SPAN><BR /><SPAN>The required resolution is 16 bit, so that makes 480 x 272 x 2 Bytes = 261120 Bytes = 255 KB.</SPAN><BR /><SPAN>So I connected a 512K x 8 bit SRAM, but I have address lines A0 to A15 and A23 to A24 available.</SPAN><BR /><SPAN>As I have only D0 to D7 available, it means I </SPAN><I><STRONG>must</STRONG></I><SPAN> use byte-access.</SPAN><BR /><SPAN>That sums up to 4 blocks of 64K each.</SPAN><BR /><BR /><SPAN>As I see it, it's not really possible to use the LCD display I have available, unless there's something I didn't think of.</SPAN><BR /><BR /><SPAN>The problem is that the LCD controller's scan-line address (as far as I understand) cannot be corrected until it reaches the end of the frame. Eg. changing the line address in a HBL interrupt will not have the desired effect.</SPAN><BR /><BR /><SPAN>Does anyone have a solution, hint, idea or suggestion ?</SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 18:06:00 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC1788-144-LCD-controller-and-external-SRAM/m-p/524401#M7037 lpcware 2016-06-15T18:06:00Z