> CPU: MPC8536DS [Core E500, Freescale] > Flash: 16MB [50MHz Local bus Clk) > DDR: 1G (SODIMM, 400 MHz) > Baord: Network Evaluation Cutom MPC8536E Board > > U-Boot Debug Issue (GPIO Toggling code help) > _________________________ > > -> as i am not able to debug uboot over jtag and the CW tool > till now, [MPC8536 CPU Suoort to the CW is not available now > it will be released in future.] > > so i have to debug it via the printf statments meanwhile > after the UART initialization get over. > But till when the UART initialization is not done so ihave to > check the Uboot process via the GPIO Togging. ;) > > So when i wrote u-boot.bin file to the Flash via Jtag CW > FlashProgrammer tool, and power on the SW of te board it does > not bootup and the GPIO toggling is not over yet what i have to do .. > is my code to toggle the GPIO is wrong or i am mistaking > anything. (This code i am testing over MPC8536DS Calamari > baord, not working there too) > > /cpu/mpc85xx/statrt.S > > ..... > .... > .section .bootpg,"ax" > .globl _start_e500 > > _start_e500: > > /* 20090520 DEBUG LED Code start */ > lis r2,adr_cfg_g...@h > ori r2,r2,adr_cfg_g...@l > > lis r3,dir_g...@h > ori r3,r3,dir_g...@l > > stw r3,0(r2) > isync > msync > > lis r2,adr_g...@h > ori r2,r2,adr_g...@l > > lis r3,dat_g...@h > ori r3,r3,dat_g...@l > isync > msync
No TLB set up for the GPIO address(FF70,....) So you need have one TLB for CCSR space. > and i declared the used macro in the file > ./include/configs/MPC8536DS.h > > ....... > .... > > #define ADR_CFG_GPIO 0xFF70FC00 /* GPIO > LED Configuration Register address */ > #define ADR_GPIO 0xFF70FC08 /* GPIO > LED Data Register */ > #define DIR_GPIO 0xFFFFFFFF /* GPIO > DIRECTION though it is GPIO [0-15] */ > #define DAT_GPIO 0xF28FF28F /* GPIO > Data GPIO[6-8] will set as toggle alternate */ > > ..... > ........ _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
