LPC1788 versus LPC2478

Started by JeGy in comp.arch.embedded4 years ago 3 replies

Hi, I have a project running on a LPC2478 with a QVGA LCD, similar to the Olimex LPC2478-STK (a subset ). It runs at 72MHz. The size of my...

Hi, I have a project running on a LPC2478 with a QVGA LCD, similar to the Olimex LPC2478-STK (a subset ). It runs at 72MHz. The size of my code is approaching the 500k limit, so I have tried to cross load the code from a serial flash to external SD-RAM and execute the code from the external SD-RAM. In this way my code can exceed the 500k limit. Unfortunately, the execution speed is...


LPC2478 LCD controller intensities and modulation rates

Started by Valio Simitrov in comp.arch.embedded6 years ago

Hello, i have a board with LPC2478 and 320x240 STN LCD. The LCD mode is set to 4bpp, Mono, STN, Little Endian byte and pixel order. I have...

Hello, i have a board with LPC2478 and 320x240 STN LCD. The LCD mode is set to 4bpp, Mono, STN, Little Endian byte and pixel order. I have initialized the palette with these values: b31 b0 hex address 0b0000000000000010 0000000000000000 0x00020000 0xFFE10200 0b0000000000000110 0000000000000100 0x00060004 0xFFE10204 0b0000000000001010...


Replacing LPC2478 with LPC1788

Started by Jens Gydesen in comp.arch.embedded3 years ago 11 replies

Hi, I have a lpc2478 PCB, with 16M SDRAM, 1/4 VGA LCD i. a. This board has run perfect for years. The SDRAM is 2x Micron...

Hi, I have a lpc2478 PCB, with 16M SDRAM, 1/4 VGA LCD i. a. This board has run perfect for years. The SDRAM is 2x Micron MT48LC16M4A2. In order to modernize this PCB, the cpu is replaced with the compatible LPC1788. I have problems with the SDRAM, it fails. The program crashes due to read/write errors and the LCD shows distorted displays. Does anyone here have expirencies with ...


LPc2478 external Sdram initialization Help Needed

Started by Dravid in comp.arch.embedded7 years ago 1 reply

Hi all, Am using lpc2478 for 6.5 TFT LCD development in that am using 256Mb(K4S561632E-FROM SAMSUNG) SDRAM for LCD FRAME BUFFER. can anyone...

Hi all, Am using lpc2478 for 6.5 TFT LCD development in that am using 256Mb(K4S561632E-FROM SAMSUNG) SDRAM for LCD FRAME BUFFER. can anyone help me to solve the sdram initialization problem, i have attached the sdram init coding can anyone suggest me to solve the sdram initalizing problem. void sdramInit(void) { volatile unsigned short i,dummy; PINSEL5 &= 0XF0FCFCC0; PINSEL5 |= 0X...


LPc2478 external Sdram initialization Help Needed

Started by Dravid in comp.arch.embedded7 years ago 1 reply

Hi all, Am using lpc2478 for 6.5 TFT LCD development in that am using 256Mb(K4S561632E-FROM SAMSUNG) SDRAM for LCD FRAME BUFFER. can anyone...

Hi all, Am using lpc2478 for 6.5 TFT LCD development in that am using 256Mb(K4S561632E-FROM SAMSUNG) SDRAM for LCD FRAME BUFFER. can anyone help me to solve the sdram initialization problem, i have attached the sdram init coding can anyone suggest me to solve the sdram initalizing problem. void sdramInit(void) { volatile unsigned short i,dummy; PINSEL5 &= 0XF0FCFCC0; PINSEL5 |= 0X050...


USB Host Lite with LPC2478 works with Transcend Jetflash V30 & not with Transcend Jetflash 300

Started by Hiren Shah in comp.arch.embedded6 years ago

I am using USB hostlite stack with LPC2478. with transcend pen drive (2gb) (Jetflash V30) formatted as FAT16 was working fine. i.e. I was able...

I am using USB hostlite stack with LPC2478. with transcend pen drive (2gb) (Jetflash V30) formatted as FAT16 was working fine. i.e. I was able to read data from any file as well as write data into any file... But the same software is not working with any other make pen drive (e.g. Sony 4gb, Transcend 2gb new pen drive-Jetflash300). In following routine the TDBuffer[12] does not become 0,...


ARM7

Started by achadya in comp.arch.embedded7 years ago 3 replies

Does anyone use the LPC2478 board for development. What resources should be used and what experience will you share. I am looking at it closely...

Does anyone use the LPC2478 board for development. What resources should be used and what experience will you share. I am looking at it closely now but have found that they have a bait and switch going in their organization. --------------------------------------- Posted through http://www.EmbeddedRelated.com


tooling

Started by achadya in comp.arch.embedded7 years ago

Has anyone used the Embedded Artists LPC2478 with a Code Red tool set? I could use a little guidance being unfamiliar with Eclipse and...

Has anyone used the Embedded Artists LPC2478 with a Code Red tool set? I could use a little guidance being unfamiliar with Eclipse and most especially the extended version that Code Red puts out for the ARM7TDMI-S. Thanks --------------------------------------- Posted through http://www.EmbeddedRelated.com


Qt on Olimex LPC2478 STK

Started by Anand P. Paralkar in comp.arch.embedded6 years ago 1 reply

Hi, Can somebody confirm or deny with certainty whether the LPC-2478STK from Olimex (http://www.olimex.com/dev/lpc-2478stk.html) has Qt in...

Hi, Can somebody confirm or deny with certainty whether the LPC-2478STK from Olimex (http://www.olimex.com/dev/lpc-2478stk.html) has Qt in its distribution CD? I am looking to develop some Qt based application. If you have used this kit, could you please tell if its distribution CD has any other GUI tool-kits/libraries for uClinux? Regards, Anand


Micro to drive a TFT LCD

Started by Raddix in comp.arch.embedded8 years ago 8 replies

I am looking to drive a 3.5" tft display similar to the one used in the following protoboard. http://olimex.com/dev/lpc-2478stk.html We were...

I am looking to drive a 3.5" tft display similar to the one used in the following protoboard. http://olimex.com/dev/lpc-2478stk.html We were considering using the lpc2478 for awhile with its dedicated lcd controller. But I was looking at the stm32 chips (107/8) and i am curious about how feasible it would be to drive the onboard HX8238 of the tft with the FSMC of the ST chip and some timing ...


Address Mapping LPC24XX

Started by Mad I.D. in comp.arch.embedded9 years ago 1 reply

I just connected a 32MB of x32 SDRAM (one IC) on LPC2478 chip and unfortunately have some doubts. SDRAM Spec: 4k Row (12bits) x 512 column...

I just connected a 32MB of x32 SDRAM (one IC) on LPC2478 chip and unfortunately have some doubts. SDRAM Spec: 4k Row (12bits) x 512 column (9bits) x 32 bits. I was having trouble to figure out where to connect bank address pins and found in some other document (not user manual) that A14:A11-> BA1:BA0 should be OK. Why is this not documented in user manual? Did I miss something ? [A12 is


ARM: JTAG problem on developed ARM board

Started by Mad I.D. in comp.arch.embedded8 years ago 4 replies

Hi. I designed an ARM7 board with LPC2478 MCU. Unfortunately, JTAG doesn't work like one would expect. I can download code to FLASH, I can...

Hi. I designed an ARM7 board with LPC2478 MCU. Unfortunately, JTAG doesn't work like one would expect. I can download code to FLASH, I can start debugging, BUT every time it comes to the first STR instruction I get "Could not stop device" ERROR. When I don't step the code it goes to some garbage address. I have ONLY ONE physical pull-up/down resistor on my JTAG 2x10 connector (device is...


USB device driver / LPC board

Started by ashu in comp.arch.embedded8 years ago 6 replies

I have a LPC2478 board (http://www.embeddedartists.com/products/kits/ lpc2478_kit.php) which comes with a USB OTG port. I will run linux...

I have a LPC2478 board (http://www.embeddedartists.com/products/kits/ lpc2478_kit.php) which comes with a USB OTG port. I will run linux on this board and connect this to PC which runs windowsXP via USB OTG port. I wanted to know if there is any quick way of making this USB communication possible without writing a USB driver from scratch. Some ready made USB API or some software li...


Segger file system and SDRAM

Started by bikerdan in comp.arch.embedded6 years ago 3 replies

I am working with an LPC2478 and the Segger file system and an IAR IDE. I am having trouble getting the file system to work out of SDRAM. It...

I am working with an LPC2478 and the Segger file system and an IAR IDE. I am having trouble getting the file system to work out of SDRAM. It works fine from on chip RAM. The SDRAM even passes a memory check. But when I try to open a file with the Segger file system using SDRAM, at one point in the execution a function that is accessed by pointer goes bad. Any thoughts greatly appreciated. ...


speed of writing file is fixed when changing the CLK of SD/MMC

Started by bobo in comp.arch.embedded7 years ago 6 replies

Hello All, I met a strange problem : the speed of writing file is fixed to a same value (about 50KB/s) whatever the SD/MMC CLK (from...

Hello All, I met a strange problem : the speed of writing file is fixed to a same value (about 50KB/s) whatever the SD/MMC CLK (from 600KHz to 12MHz), my platform is LPC2478, SD card is 2GB, filesystem is FatFs; I have tried 600KHz, 1MHz, 2MHz, 3MHz, 6MHz, 12MHz, but the Write speed seams fixed to 50KB/s, and i used the scope to observe the CLK CMD and DATA[0:3] pins, the CLK frequency...