求助：STM32F103VE+RA8875+AT070TN83显示异常

physh · 发表于 2012-2-15 20:46:00

我根据网站内的资料做了一块RA8875的显示板，但显示不正常，如图，用示波器看DE信号和RA8875的资料不一样，根据手册REG[15h] Horizontal Non-Display Period Fine Tuning Option Register (HNDFTR)，bit7不管设为0还是1，DE信号极性不变。波形也不对。请大家看看怎么设置啊。附RA8875初始化语句。
WriteCommand(0x88); //SYS_CLK = FIN*(PLLDIVN[4:0] +1)/((PLLDIVM+1)*(2^PLLDIVK[2:0]))
WriteData(0x14); //PLLDIVN[4:0] = 20 FIN = 16MHz  PLLDIVM =0 0x14
DelayMs(1);

WriteCommand(0x89);
WriteData(0x02); //PLLDIVK[2:0] =2
DelayMs(10);

WriteCommand(0x10);  //SYSR u8[4:3]=00 256 color  u8[2:1]=  00 8u8 MPU interface
WriteData(0x0F); // if 8u8 MCU interface and 65k color display----- 0x0c
DelayMs(1);

WriteCommand(0x04);  //PCLK inverse
WriteData(0x81);
DelayMs(1);

//Horizontal set
WriteCommand(0x14); //HDWR//Horizontal Display Width Setting Bit[6:0]
WriteData(0x63);//Horizontal display width(pixels) = (HDWR + 1)*8
WriteCommand(0x15);//Horizontal Non-Display Period Fine Tuning Option Register (HNDFTR)
WriteData(0x00);//Horizontal Non-Display Period Fine Tuning(HNDFT) [3:0]
WriteCommand(0x16); //HNDR//Horizontal Non-Display Period Bit[4:0]
WriteData(0x03);//Horizontal Non-Display Period (pixels) = (HNDR + 1)*8
WriteCommand(0x17); //HSTR//HSYNC Start Position[4:0]
WriteData(0x04);//HSYNC Start Position(PCLK) = (HSTR + 1)*8
WriteCommand(0x18); //HPWR//HSYNC Polarity ,The period width of HSYNC.
WriteData(0x8F);//HSYNC Width [4:0] HSYNC Pulse width(PCLK) = (HPWR + 1)*8
DelayMs(1);
//Vertical set
WriteCommand(0x19); //VDHR0 //Vertical Display Height Bit [7:0]
WriteData(0xdf);//Vertical pixels = VDHR + 1
WriteCommand(0x1a); //VDHR1 //Vertical Display Height Bit [8]
WriteData(0x01);//Vertical pixels = VDHR + 1
WriteCommand(0x1b); //VNDR0 //Vertical Non-Display Period Bit [7:0]
WriteData(0x03);//Vertical Non-Display area = (VNDR + 1)
WriteCommand(0x1c); //VNDR1 //Vertical Non-Display Period Bit [8]
WriteData(0x00);//Vertical Non-Display area = (VNDR + 1)
WriteCommand(0x1d); //VSTR0 //VSYNC Start Position[7:0]
WriteData(0x03);//VSYNC Start Position(PCLK) = (VSTR + 1)
WriteCommand(0x1e); //VSTR1 //VSYNC Start Position[8]
WriteData(0x00);//VSYNC Start Position(PCLK) = (VSTR + 1)
WriteCommand(0x1f); //VPWR //VSYNC Polarity ,VSYNC Pulse Width[6:0]
WriteData(0x01);//VSYNC Pulse Width(PCLK) = (VPWR + 1)
DelayMs(1);

physh · 发表于 2012-2-15 20:47:16

回复【楼主位】physh
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图忘了传了。

(原文件名:DSC_0029_01.JPG)

(原文件名:DSC_0030.JPG)

physh · 发表于 2012-2-16 17:33:08

没人顶，我自己顶，发现一个好奇怪的现象，

(原文件名:1_01.JPG)

根据LCD时序，HPW也就是行同步的脉宽设为5，行频变为115KHz，可是脉宽的宽度却宽了,占了1/3整个波形（根据示波器图形，我自己估算的）。设为B反而变窄了，占有1/10吧，行频变为31KHz。

physh · 发表于 2012-2-18 18:05:47

总算解决了，显示还行吧。

whimsy · 发表于 2012-2-19 18:02:01

怎么解决的不想告诉我们吗？

hgy_tom · 发表于 2012-4-14 09:11:23

能分享解决的方法吗？

TigerRay · 发表于 2012-11-12 09:23:57

LZ这样的情况一般都是时序的问题,就是说时序没有配置对,

TigerRay · 发表于 2012-11-27 23:12:45

这会儿我也遇到同样的问题了,就是DE信号极性不对,也不知道到那里去设置的!所以不一直没有显示正确啊!驱动时序不对!

physh · 发表于 2013-1-29 14:00:35

TigerRay 发表于 2012-11-27 23:12
这会儿我也遇到同样的问题了,就是DE信号极性不对,也不知道到那里去设置的!所以不一直没有显示正确啊!驱动时 ...

芯片有问题，程序不用改，换块芯片（买了五块，有两块有这样的问题。）就好了。现在又遇到了使用RA8875外挂的字库显示字符串，老是只显示第一个字符，后面的显示不出来，不知道什么原因。网上找不到相关的资料，有人也提出这个问题，没人回答。SYS_CLK设为 60MHZ以上有刺耳的哮叫声，我现在只能设为大约50MHZ吧。用这个芯片真头大。

TigerRay · 发表于 2013-2-16 15:04:04

physh 发表于 2013-1-29 14:00
芯片有问题，程序不用改，换块芯片（买了五块，有两块有这样的问题。）就好了。现在又遇到了使用RA8875外 ...

现在我也是基本上搞到一半,又放到那里了,回家过完年在说了!这东西哎!不好说啊,有时候想想还真不如自己用CPLD写啊!就是功能没有那么多了!

zchong · 发表于 2013-9-4 20:29:08

兄弟，把初始化的代码共享一下吧，

zchong · 发表于 2013-9-7 20:26:50

兄弟，这个时序貌似有些问题啊，与AT070TN83不一致啊

physh · 发表于 2013-11-9 19:13:22

用在ＡＴ070ＴＮ83正常，现在又用在stm32f407板上了。自己做的板。
void Init_RA875(void)
{
lcd_rst();
WriteCommand(0x88); //SYS_CLK = FIN*(PLLDIVN[4:0] +1)/((PLLDIVM+1)*(2^PLLDIVK[2:0])); SYS_CLK=25MHz*(7+1)/(1*(2^3)=25MHz.
WriteData(0x07); //PLLDIVN[4:0] = 20 FIN = 25MHz  PLLDIVM =0 0x10
delay_ms(1);

WriteCommand(0x89);
WriteData(0x03); //PLLDIVK[2:0] =2
delay_ms(10);

WriteCommand(0x10);  //SYSR u8[4:3]=00 256 color  u8[2:1]=  00 8u8 MPU interface
WriteData(0x0F); // if 8u8 MCU interface and 65k color display----- 0x0c
delay_ms(1);

WriteCommand(0x04);  //PCLK inverse
WriteData(0x81);
delay_ms(1);

//Horizontal set
WriteCommand(0x14); //HDWR//Horizontal Display Width Setting Bit[6:0]
WriteData(0x63);//Horizontal display width(pixels) = (HDWR + 1)*8
WriteCommand(0x15);//Horizontal Non-Display Period Fine Tuning Option Register (HNDFTR)
WriteData(0x00);//Horizontal Non-Display Period Fine Tuning(HNDFT) [3:0]
WriteCommand(0x16); //HNDR//Horizontal Non-Display Period Bit[4:0]
WriteData(0x03);//Horizontal Non-Display Period (pixels) = (HNDR + 1)*8
WriteCommand(0x17); //HSTR//HSYNC Start Position[4:0]
WriteData(0x03);//HSYNC Start Position(PCLK) = (HSTR + 1)*8
WriteCommand(0x18); //HPWR//HSYNC Polarity ,The period width of HSYNC.
WriteData(0x0B);//HSYNC Width [4:0] HSYNC Pulse width(PCLK) = (HPWR + 1)*8
delay_ms(1);
//Vertical set
WriteCommand(0x19); //VDHR0 //Vertical Display Height Bit [7:0]
WriteData(0xdf);//Vertical pixels = VDHR + 1
WriteCommand(0x1a); //VDHR1 //Vertical Display Height Bit [8]
WriteData(0x01);//Vertical pixels = VDHR + 1
WriteCommand(0x1b); //VNDR0 //Vertical Non-Display Period Bit [7:0]
WriteData(0x1f);//Vertical Non-Display area = (VNDR + 1)
WriteCommand(0x1c); //VNDR1 //Vertical Non-Display Period Bit [8]
WriteData(0x00);//Vertical Non-Display area = (VNDR + 1)
WriteCommand(0x1d); //VSTR0 //VSYNC Start Position[7:0]
WriteData(0x16);//VSYNC Start Position(PCLK) = (VSTR + 1)
WriteCommand(0x1e); //VSTR1 //VSYNC Start Position[8]
WriteData(0x00);//VSYNC Start Position(PCLK) = (VSTR + 1)
WriteCommand(0x1f); //VPWR //VSYNC Polarity ,VSYNC Pulse Width[6:0]
WriteData(0x01);//VSYNC Pulse Width(PCLK) = (VPWR + 1)
delay_ms(1);

//Active window  set
//setting active window X
WriteCommand(0x30); //Horizontal Start Point 0 of Active Window (HSAW0)
WriteData(0x00); //Horizontal Start Point of Active Window [7:0]
WriteCommand(0x31); //Horizontal Start Point 1 of Active Window (HSAW1)
WriteData(0x00); //Horizontal Start Point of Active Window [9:8]
WriteCommand(0x34); //Horizontal End Point 0 of Active Window (HEAW0)
WriteData(0x1F); //Horizontal End Point of Active Window [7:0]
WriteCommand(0x35); //Horizontal End Point 1 of Active Window (HEAW1)
WriteData(0x03); //Horizontal End Point of Active Window [9:8]
delay_ms(1);

//setting active window Y
WriteCommand(0x32); //Vertical Start Point 0 of Active Window (VSAW0)
WriteData(0x00); //Vertical Start Point of Active Window [7:0]
WriteCommand(0x33); //Vertical Start Point 1 of Active Window (VSAW1)
WriteData(0x00); //Vertical Start Point of Active Window [8]
WriteCommand(0x36); //Vertical End Point of Active Window 0 (VEAW0)
WriteData(0xdf); //Vertical End Point of Active Window [7:0]
WriteCommand(0x37); //Vertical End Point of Active Window 1 (VEAW1)
WriteData(0x01); //Vertical End Point of Active Window [8]
delay_ms(1);

WriteCommand(0x70); //set TP sample time  & ADC clock
WriteData(0xB2);//ADC取样为4096个系统周期，可唤醒，系统频率的1/4。
TP_auto_mode(); //enable auto mode
Touch_Panel_Interrupt_Enable(); // 开启触控面板中断。
Enable_TP();  // 启用触控面板

RA8875_WAITSTATUS();

clear_TP_interrupt();
Active_Window(0,799,0,479); //设定面板分辨率为800*480 pixel
HDIR_SEGn_SEG0(); //让屏幕显示颠倒90度
Clear_Active_Window();
Text_Background_Color(WHITE);

//Font_with_BackgroundTransparency();
Memory_Clear();
Display_ON();

// LcdClear(WHITE);//清屏

//设置背光
PWM1_enable();
PWM1_fnuction_sel();
PWM1_clock_ratio(0xFF);//2MHz PWM1
PWM1_duty_cycle(0x7E);

PWM2_disable_level_low();
PWM2_fnuction_sel();
PWM2_clock_ratio(0x09);//2MHz PWM1
PWM2_duty_cycle(0x7E);

//设置数字光标
Text_Cursor_Horizontal_Size(24);
Text_Cursor_Vertical_Size(4);
Text_Blink_Time(0x35);
Text_Cursor_Blink_Enable();
Text_Cursor_Disable();
MemoryWrite_Cursor_autoIncrease();//写光标加1，才和数据显示有关

}
我发现用ＲＡ8875的一个好处，fatfs不用936，用437，也就是英文长文件各，同样也显示中文文件名。无意之中发现的。

求助：STM32F103VE+RA8875+AT070TN83显示异常

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