STM32F4 FSMC驱动RA8875 读DDRAM问题求指教！！！！！！！！！！！！！！！！！！！

rayen · 发表于 2013-9-4 15:46:45

FSMC驱动RA8875，基本屏幕所有代码都已调通，触摸屏也好了，现在就一个问题：

读内存时，比如BTE读取，连续读取数据，只有第一个点的数据是正确的，后面点的数据都是重复第一个点的数据，也就是说单独读一个点没问题，连续读就出错了。

其他指令读写，内存写都没问题，相关代码后面贴上，望大神指点下……

rayen · 发表于 2013-9-4 16:27:39

typedef struct
{
  __IO uint16_t LCD_RAM;
__IO uint16_t LCD_REG;
} LCD_TypeDef;

#define Bank1_SRAM1_ADDR  ((uint32_t)0x60000000)
#define Bank1_SRAM2_ADDR  ((uint32_t)0x64000000)
#define Bank1_SRAM3_ADDR  ((uint32_t)0x68000000)
#define Bank1_SRAM4_ADDR  ((uint32_t)0x6C000000)

#define LCD_BASE           Bank1_SRAM3_ADDR
#define LCD                ((LCD_TypeDef *) LCD_BASE)

void BTE_Read(u16 width, u16 height, u16 SX, u16 SY, u8 SL)
{
u16 data[100] = {0},i=0;

BTE_Size(width,height);
BTE_Source_Destination(SX,SY,SL,0,0,0);//BTE起始位置设置
LCD_DataWrite(0x51,0x01);//光栅设定
LCD_DataWrite(0x50,0x80);//BTE开启
LCD_RegWrite(0x02);
data[0] = LCD->LCD_RAM;
Chk_Busy();
while(i < 100)
{
data[i++] = LCD->LCD_RAM;
Chk_Busy();
}
Chk_BTE_Busy();

i = 0;
BTE_Size(width,height);
BTE_Source_Destination(0,0,0,100,0,0);//BTE起始位置设置
LCD_DataWrite(0x51,0xc0);//光栅设定
LCD_DataWrite(0x50,0x80);
LCD_RegWrite(0x02);
while(i < width*height)
{
LCD_RamWrite(data[i++]);
Chk_Busy();
}
Chk_BTE_Busy();
LCD_DataWrite(0x50,0x00);//BTE关闭
}

rayen · 发表于 2013-9-4 16:30:27

void BTE_Read(u16 width, u16 height, u16 SX, u16 SY, u8 SL)
{
u16 data[100] = {0},i=0;

  BTE_Size(width,height);
BTE_Source_Destination(SX,SY,SL,0,0,0);//BTE起始位置设置
LCD_DataWrite(0x51,0x01);//光栅设定
LCD_DataWrite(0x50,0x80);//BTE开启

LCD_RegWrite(0x02);//发送指令 0x02
data[0] = LCD->LCD_RAM;
Chk_Busy();
while(i < 100)
{
  data[i++] = LCD->LCD_RAM;
  Chk_Busy();
}
//Chk_BTE_Busy();

i = 0;
  BTE_Size(width,height);
BTE_Source_Destination(0,0,0,100,0,0);//BTE起始位置设置
LCD_DataWrite(0x51,0xc0);//光栅设定
LCD_DataWrite(0x50,0x80);
LCD_RegWrite(0x02);
while(i < width*height)
{
  LCD_RamWrite(data[i++]);
  Chk_Busy();
}
Chk_BTE_Busy();
LCD_DataWrite(0x50,0x00);//BTE关闭
}

读数据主要在写红色部分，下面是把读的数据显示出来