A20 CB2 点亮FHD 屏 异常求助
今天在用CB2点AUO5.5 FHD屏时,出现异常,用示波器扎PCLK 波形如图,PCLK输出波形不对,看官是否遇到过如下是sys_config.fex设置
lcd0_para]
lcd_used = 1
lcd_x = 1080
lcd_y = 1920
lcd_width = 0
lcd_height = 0
lcd_dclk_freq = 90
lcd_pwm_not_used = 0
lcd_pwm_ch = 0
lcd_pwm_freq = 10000
lcd_pwm_pol = 0
lcd_if = 4
lcd_hbp = 66
lcd_ht = 1186
lcd_vbp = 15
lcd_vt = 1947
lcd_vspw = 3
lcd_hspw = 26
lcd_hv_if = 0
lcd_hv_smode = 0
lcd_hv_s888_if = 0
lcd_hv_syuv_if = 0
lcd_lvds_ch = 0
lcd_lvds_mode = 0
lcd_lvds_bitwidth = 0
lcd_lvds_io_cross = 0
lcd_cpu_if = 0
lcd_frm = 1
lcd_io_cfg0 = 0x00000000
lcd_gamma_correction_en = 0
lcd_gamma_tbl_0 = 0x00000000
lcd_gamma_tbl_1 = 0x00010101
lcd_gamma_tbl_255 = 0x00ffffff
正常的PCLK 波形应该高低电平都差不多才应该啊 已经搞定了,已经正常点亮FHD 是做了什么修改呢?
sys_config.fex的参数有改动吗? Geek 发表于 2015-12-8 17:37 static/image/common/back.gif
是做了什么修改呢?
sys_config.fex的参数有改动吗?
实际测试PCLK 不能大于130MHZ,设置成128MHZ 就好了,具体什么原因还不知道。也有可能是我SSD2828 MIPI 通道没有做阻抗的原因吧。
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