请教！STM32 FSMC读 HX8347 的 GRAM ，怎么用力都读不对。

只看该作者 · 2010-7-24 19:12

1、TFT正常显示。
2、STM32 FSMC 读 HX8347 的 GRAM错误，读到的第一个数是0x00fc，第二个数是0x0000。
3、读 HX8347 的其它寄存器都正确。
请前辈、大侠、掌门、教主、帮主、方丈、师太、护_法、路人甲、路人乙指点。

（库函数3.0）
typedef struct
{
  volatile unsigned short int LCD_REG;
  volatile unsigned short int LCD_RAM;
} LCD_TypeDef;

/* LCD is connected to the FSMC_Bank1_NOR/SRAM4 and NE4 is used as ship select signal */
#define LCD_BASE ((unsigned int)(0x60000000 | 0x0C000000))
#define LCD       ((LCD_TypeDef *) LCD_BASE)

TFTConfig(void)
{
GPIO_InitTypeDef GPIO_InitStructure;

FSMC_NORSRAMInitTypeDef FSMC_NORSRAMInitStructure;
FSMC_NORSRAMTimingInitTypeDef p;

// Enable FSMC, GPIOD, GPIOE, GPIOF, GPIOG and AFIO clocks
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD |RCC_APB2Periph_GPIOE |RCC_APB2Periph_GPIOF |RCC_APB2Periph_GPIOG |RCC_APB2Periph_AFIO,ENABLE);

// PD.00(D2), PD.01(D3), PD.04(NOE), PD.05(NWE), PD.08(D13),
// PD.09(D14),PD.10(D15), PD.14(D0), PD.15(D1)
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_0 |GPIO_Pin_1 |GPIO_Pin_4 |GPIO_Pin_5 |GPIO_Pin_8 |GPIO_Pin_9 |GPIO_Pin_10 |GPIO_Pin_14 |GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);

// PE.07(D4), PE.08(D5), PE.09(D6), PE.10(D7), PE.11(D8),
// PE.12(D9), PE.13(D10), PE.14(D11), PE.15(D12)
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 |GPIO_Pin_8 |GPIO_Pin_9 |GPIO_Pin_10 |GPIO_Pin_11 |GPIO_Pin_12 |GPIO_Pin_13 |GPIO_Pin_14 |GPIO_Pin_15;
GPIO_Init(GPIOE, &GPIO_InitStructure);

// PF.00(A0 (RS)) as alternate function push pull
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_Init(GPIOF, &GPIO_InitStructure);

// PG.12(NE4 (LCD/CS)) as alternate function push pull - CE3(LCD /CS)
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_Init(GPIOG, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOG, &GPIO_InitStructure);

p.FSMC_AddressSetupTime = 0;
p.FSMC_AddressHoldTime = 0;
p.FSMC_DataSetupTime = 2;
p.FSMC_BusTurnAroundDuration = 0;
p.FSMC_CLKDivision = 0;
p.FSMC_DataLatency = 0;
p.FSMC_AccessMode = FSMC_AccessMode_A;

FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM4;
FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;
FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_SRAM;
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;
FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;
FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;
FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;
FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &p;
FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &p;

FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);

// BANK 4 (of NOR/SRAM Bank 1~4) is enabled
FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM4, ENABLE);

FDelay10000X(4);

LCD_RST_1;
FDelay10000X(1);
LCD_RST_0;
FDelay10000X(2);
LCD_RST_1;
FDelay10000X(4);

LCD_WriteReg(0x0046,0x0095);
LCD_WriteReg(0x0047,0x0051);
LCD_WriteReg(0x0048,0x0000);
LCD_WriteReg(0x0049,0x0036);
LCD_WriteReg(0x004A,0x0011);
LCD_WriteReg(0x004B,0x0066);
LCD_WriteReg(0x004C,0x0014);
LCD_WriteReg(0x004D,0x0077);
LCD_WriteReg(0x004E,0x0013);
LCD_WriteReg(0x004F,0x004C);
LCD_WriteReg(0x0050,0x0046);
LCD_WriteReg(0x0051,0x0046);

//240x320 window setting
LCD_WriteReg(0x0002,0x0000); // Column address start2
LCD_WriteReg(0x0003,0x0000); // Column address start1
LCD_WriteReg(0x0004,0x0000); // Column address end2  0
LCD_WriteReg(0x0005,0x00eF); // Column address end1  ef
LCD_WriteReg(0x0006,0x0000); // Row address start2
LCD_WriteReg(0x0007,0x0000); // Row address start1
LCD_WriteReg(0x0008,0x0001); // Row address end2
LCD_WriteReg(0x0009,0x003F); // Row address end1
LCD_WriteReg(0x0090,0x007F); // SAP=0111 1111

//Display Setting
LCD_WriteReg(0x0001,0x0006);    // IDMON=0, INVON=1, NORON=1, PTLON=0
LCD_WriteReg(0x0016,0x0068);
LCD_WriteReg(0x0023,0x0095); // N_DC=1001 0101
LCD_WriteReg(0x0024,0x0095); // P_DC=1001 0101
LCD_WriteReg(0x0025,0x00FF); // I_DC=1111 1111
LCD_WriteReg(0x0027,0x0006); // N_BP=0000 0110
LCD_WriteReg(0x0028,0x0006); // N_FP=0000 0110
LCD_WriteReg(0x0029,0x0006); // P_BP=0000 0110
LCD_WriteReg(0x002A,0x0006); // P_FP=0000 0110
LCD_WriteReg(0x002C,0x0006); // I_BP=0000 0110
LCD_WriteReg(0x002D,0x0006); // I_FP=0000 0110
LCD_WriteReg(0x003A,0x0001); // N_RTN=0000, N_NW=001
LCD_WriteReg(0x003B,0x0000); // P_RTN=0000, P_NW=001
LCD_WriteReg(0x003C,0x00F0); // I_RTN=1111, I_NW=000
LCD_WriteReg(0x003D,0x0000); // DIV=00
FDelay10000X(10);
LCD_WriteReg(0x0035,0x0038); // EQS=38h
LCD_WriteReg(0x0036,0x0078); // EQP=78h
LCD_WriteReg(0x003E,0x0038); // SON=38h
LCD_WriteReg(0x0040,0x000F); // GDON=0Fh
LCD_WriteReg(0x0041,0x00F0); // GDOFF
//Power Supply Setting
LCD_WriteReg(0x0019,0x0049);             // OSCADJ=10 0000,OSD_EN=1 //60Hz
LCD_WriteReg(0x0093,0x000C);             // RADJ=1100,
FDelay10000X(5);
LCD_WriteReg(0x0020,0x0040);             // BT=0100
LCD_WriteReg(0x001D,0x0007);             // VC1=111
LCD_WriteReg(0x001E,0x0000);             // VC3=000
LCD_WriteReg(0x001F,0x0007);                               //  VRH=0100 4.12V
LCD_WriteReg(0x0044,0x0030);       // VCM=101 0000 3.21V
LCD_WriteReg(0x0045,0x0009);       // VDV=1 0001  -1.19V
FDelay10000X(5);
LCD_WriteReg(0x001C,0x0004);       // AP=100
FDelay10000X(10);
LCD_WriteReg(0x001B,0x0018);       // GASENB=0, PON=1, DK=1, XDK=0, DDVDH_TRI=0, STB=0
FDelay10000X(20);
LCD_WriteReg(0x001B,0x0010);       // GASENB=0, PON=1, DK=1, XDK=0, DDVDH_TRI=0, STB=0
FDelay10000X(20);
LCD_WriteReg(0x0043,0x0080);       //set VCOMG=1
FDelay10000X(5);
//Display ON Setting
LCD_WriteReg(0x0090,0x007f);
LCD_WriteReg(0x0026,0x0004); //GON=0, DTE=0, D=01
FDelay10000X(20);
LCD_WriteReg(0x0026,0x003C); //GON=1, DTE=1, D=11
}

void LCD_SetCursor(unsigned short int Xpos, unsigned short int Ypos)
{
LCD_WriteReg(0x06,Ypos>>8);
LCD_WriteReg(0x07,Ypos);
LCD_WriteReg(0x02,Xpos>>8);
LCD_WriteReg(0x03,Xpos);
}

unsigned short int GetPoint(unsigned short int Xpos, unsigned short int Ypos)
{
unsigned short int temp1,temp2;
LCD_SetCursor(Xpos,Ypos);
LCD->LCD_REG = 0x0022;
temp1 = LCD->LCD_RAM;
temp2 = LCD->LCD_RAM;
}

结果：
temp1:0x00fc,  temp2:0x0000.