MT6735_DDR问题_请教
05-08
现有一案子,MTK6735A+分离的LPDDR3(两颗16bit)_eMMC。试产20pcs:8pcs可以正常下载,但程序跑到某个固定点后系统重启;8pcs不能正常下载(DA红条走完后不动了,串口log显示DRAM的容量不正常);4pcs可以下载,但黄条跑到27%后死掉。
启动部分log如下:
[EMI] DRAMC calibration passed
[DRAM] DFS rank0 coarse fine : 18 80
DFS could be enable
RGU rgu_dram_reserved:MTK_WDT_MODE(220000CC)
EMI Setting OK.
the value is: 0x3C, the address is: 40000000
the value is: 0x3C, the address is: 40000001
the value is: 0x3C, the address is: 40000002
the value is: 0x52, the address is: 40000003
the value is: 0x41, the address is: 40000004
the value is: 0x4D, the address is: 40000005
the value is: 0x5F, the address is: 40000006
the value is: 0x42, the address is: 40000007
the value is: 0x45, the address is: 40000008
the value is: 0x47, the address is: 40000009
the value is: 0x49, the address is: 4000000A
the value is: 0x4E, the address is: 4000000B
the value is: 0x3E, the address is: 4000000C
the value is: 0x3E, the address is: 4000000D
the value is: 0x3E, the address is: 4000000E
RAM_SIZE(40000000)
RAM: RW(80000000)
[RX] (43000480: 3CDD0000)
RAM_SIZE(17EC000)
RAM: RW(417EC000)
23MB DRAM is accessable!
LoadDAToDRAM(), base=0x40000000, length=0x33750, packet_size=0x1000
======================================================
log中“23MB DRAM is accessable!”是不是说明DDR部分有问题?
启动部分log如下:
[EMI] DRAMC calibration passed
[DRAM] DFS rank0 coarse fine : 18 80
DFS could be enable
RGU rgu_dram_reserved:MTK_WDT_MODE(220000CC)
EMI Setting OK.
the value is: 0x3C, the address is: 40000000
the value is: 0x3C, the address is: 40000001
the value is: 0x3C, the address is: 40000002
the value is: 0x52, the address is: 40000003
the value is: 0x41, the address is: 40000004
the value is: 0x4D, the address is: 40000005
the value is: 0x5F, the address is: 40000006
the value is: 0x42, the address is: 40000007
the value is: 0x45, the address is: 40000008
the value is: 0x47, the address is: 40000009
the value is: 0x49, the address is: 4000000A
the value is: 0x4E, the address is: 4000000B
the value is: 0x3E, the address is: 4000000C
the value is: 0x3E, the address is: 4000000D
the value is: 0x3E, the address is: 4000000E
RAM_SIZE(40000000)
RAM: RW(80000000)
[RX] (43000480: 3CDD0000)
RAM_SIZE(17EC000)
RAM: RW(417EC000)
23MB DRAM is accessable!
LoadDAToDRAM(), base=0x40000000, length=0x33750, packet_size=0x1000
======================================================
log中“23MB DRAM is accessable!”是不是说明DDR部分有问题?
不错,值得学习
没焊好,软件
楼上,如果是软件的话,是否可以说明的更具体一些,确实没有招了。如果帮忙解决了,必有重谢!有意的话,加我QQ:352033445.
谢谢了
MTK6735A 不定时出来花屏,然后重启,抓LOG抓不到,很难复现,但是百分百每台机器都会出现,有遇到过的吗?
DDR阻抗没有做好
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