修改sys_config.fex文件两个地方
[clock]
pll3 = 297
pll4 = 300
pll6 = 600
pll7 = 297
pll8 = 336
[dram_para]
dram_baseaddr = 0x40000000
dram_clk = 408
dram_type = 3
dram_rank_num = 0xffffffff
dram_chip_density = 0xffffffff
dram_io_width = 0xffffffff
dram_bus_width = 0xffffffff
dram_cas = 9
dram_zq = 0x7b
dram_odt_en = 0
dram_size = 0xffffffff
dram_tpr0 = 0x42d899b7
dram_tpr1 = 0xa090
dram_tpr2 = 0x22a00
dram_tpr3 = 0x0
dram_tpr4 = 0x0
dram_tpr5 = 0x0
dram_emr1 = 0x4
dram_emr2 = 0x10
dram_emr3 = 0x0
...)
)