I used the u-boot code from ftp://micrel.com/ethernet/8692/8692-uboot.bz2
Changes made:
In my board am having two 32MB DDRs each with data width 32 bit. Total DDR memory will be 64MB
i run the command make ks8692_micron_166_config
Then i modified the include/config.h file as below ( since config.h is generated as read only, i changed the file permission before editing)
#define MICRON_166_DDR #define PHYS_SDRAM_1_SIZE 0x04000000 /* 64MB*/ #define KS8692_DDR_ROW_COLON_CONF DDR_256MBIT_BY_16 /* each IC is 256Mb with 16 bit data width */ #define KS8692_DDR_BUS_SIZE_CONF DDR_BUS_32BIT
/* Automatically generated - do not edit */ #include <configs/ks8692.h>
I made similar changes in include/configs/ks8692.h
Changed CONFIG_CONS_INDEX to 2 in include/configs/ks8692.h as i am using UART2
Changes in lowlevel_init.s (
1. Changed all UART1 to UART2
2. Changed ldr r4, =0x03000000 /* somewhere in DDR RAM */
to ldr r4, =0x01000000 /* somewhere in DDR RAM */
3. Changed ldr pc, =0x3000000 /* jump to DDR instruction */ to ldr pc, =0x1000000 /* jump to DDR instruction */
I compiled and dowloaded the u-boot.bin to flash. I am not able to see any prints in hyperterminal.
Hyperterminal was set for baudrate: 1152000
For debugging purpose i added the following lines just after serial init in lowlevel_init.s ldr r1, =KS8692_IO_BASE+KS8692_UART2_TX_HOLDING ldr r2, =65 /* alphabet A */ str r2, [r1]
ldr r1, =KS8692_IO_BASE+KS8692_UART2_TX_HOLDING ldr r2, =66 /* alphabet B */ str r2, [r1]
Now am able to continuous stream of ABABABABABAB......... in the hyperterminal.
Please help me to debug and fix the issue.
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