| ??? 02/11/05 11:32 Read: times |
#87131 - thinking... Responding to: ???'s previous message |
hi,
David Salame said:
i am in a process of prototyping a multimedia system What is exactly? Will it play MP3, mpeg2/divX, support CD/DVD drivers, utilize SD/MMC or USB storage etc? If so then drop 8051. It is good derivative but it cannot do all in the World. There alot of cheap solutions, for example ARM-based, special multimedia processors from TMS, Cirrus etc. Almost have built-in SRAM and LCD/VGA controllers built-in. now with this screen , it will be much more attractive. problem is, 8051 dont seem to be able to drive it. i need to scan it from a ram image over and over again. (320x(3)x240) == 28800Bytes per frame. You have not specified the refresh rate. Depend on byte stream rate, refresh process may be done either by interrupt routine or with external CPLD. Usage of CPLD (Altera, Xilinx, Actel etc) increases the cost but keeps MCU productivity. first problem with 8051 is that RAM for 16bpp image is too small. Use external RAM. second , i need to AC (blink) each RGB pixel according to the desired color-tone specified in the 16bpp value - processing power that i am having trouble to get with 8051. Common used procedure is the palette LUT (look-up tables). Once again - I would preffered to use additional CPLD with small amount of RAM inside utilized for frame buffer and palette LUT. anyone has an idea of how to drive it? (i truely prefer 8051, but it seems like it cant be done for the UI requirements). If "it seems" then drop this idea. By the way, here we are in process of creating similar board. Read http://www.8052.com/forum/read.phtml?id=82291 and all that thread. Regards, Oleg |
| Topic | Author | Date |
| cstn screen challenge | 01/01/70 00:00 | |
| another idea | 01/01/70 00:00 | |
| pci | 01/01/70 00:00 | |
| thinking... | 01/01/70 00:00 | |
| Code library | 01/01/70 00:00 | |
| comments and project specs | 01/01/70 00:00 | |
| what you really really want | 01/01/70 00:00 | |
| mini-itx | 01/01/70 00:00 | |
| Looks good | 01/01/70 00:00 | |
| and NOW | 01/01/70 00:00 | |
| Instant on? | 01/01/70 00:00 | |
| yes- they come with compact-flash socket | 01/01/70 00:00 | |
| Pardon ? | 01/01/70 00:00 | |
| i already have 8 LCDs | 01/01/70 00:00 | |
| Instant-on | 01/01/70 00:00 | |
| Oh Yes | 01/01/70 00:00 | |
| SD | 01/01/70 00:00 | |
| Graphical apps | 01/01/70 00:00 | |
about linux graphical app | 01/01/70 00:00 | |
| theoreticly not, but in reality... | 01/01/70 00:00 | |
| Browse the code library | 01/01/70 00:00 | |
| your pci idea | 01/01/70 00:00 |