**** BEGIN LOGGING AT Tue Mar 06 02:59:56 2007 Mar 06 11:16:09 hi together Mar 06 11:16:32 vmaster: i've finished my serial loader, to copy uboot into ram Mar 06 11:17:23 but maybe i've done a design failure of my board :-( Mar 06 11:37:39 hey aproemel Mar 06 11:38:16 do you know if uboot requieres a serial data flash ? Mar 06 11:39:14 it definitely doesn't require one Mar 06 11:39:20 it can support one, if you have it Mar 06 11:39:35 great, then i haven't done a design mistake Mar 06 11:39:53 because every board i looked at, has serial data flash Mar 06 11:40:19 but i found something strange Mar 06 11:41:31 my loader configs the board with 180/90 MHz and 115200 Baud Mar 06 11:42:10 all works fine, until i start uboot out of SDRAM, then serial output isn't working Mar 06 11:42:32 if I config the board with 180/60 115200 everything works fine Mar 06 11:43:10 I took the uboot.bin shipped with my embest demo board Mar 06 11:43:22 might be a problem with the board layout or with your sdram timing Mar 06 11:43:31 sdram works fine, in both modes Mar 06 11:43:48 how did you verify that? Mar 06 11:44:00 wrote a test util Mar 06 11:44:06 write a datum to an address Mar 06 11:44:22 read it, modified it, write it back again, read it again Mar 06 11:44:44 well, in u-boot's normal mode of operation, u-boot is responsible for bringing clocks and memory up and running Mar 06 11:44:44 First i write whole 32MB Mar 06 11:44:57 so your u-boot.bin might touch these settings Mar 06 11:45:22 i know Mar 06 11:45:32 but if uboot change the clocks etc Mar 06 11:45:39 but hold the 115200 baud rate Mar 06 11:46:09 i should get correct characters via rs232, and not any ascii garbash Mar 06 11:46:59 but it works with 180/60 so i'll let it unmodified, and set correct speed later, when linux is running Mar 06 11:48:10 UART timings often depends on the bus clock Mar 06 11:48:33 yes, but its hard to explain, what i mean **** ENDING LOGGING AT Wed Mar 07 02:59:57 2007