RT-Thread-关于STM32F4的FSMC连接LCD问题RT-Thread问答社区

关于STM32F4的FSMC连接LCD问题

发布于 2013-12-31 14:17:08 浏览：5365 订阅该版

硬件：stm32f4-discovery
LCD: ILI9481
目前连接线方式：
接线：
DB0		PD14
DB1		PD15
DB2		PD0
DB3		PD1
DB4		PE7
DB5		PE8
DB6		PE9
DB7		PE10
DB8		PE11
DB9		PE12
DB10	PE13
DB11	PE14
DB12	PE15
DB13	PD8
DB14	PD9
DB15	PD10

CS NE1	PD7
RS A19	PE3
WR NWE	PD5
RD NOE	PD4

RESET RESET

VCC/GND跟单片机共用，LED背光，长开。

解决第一个问题：这样连接线是否可以？
(在群里的大大说了可以来的，最终的目的是点亮这个屏)
结论目前是，这样连线是可以的

第二个问题，初始化
一个要初始化GPIO为FSMC模式，二是要初始化FSMC总线
这需要两个函数来完成
如下
```
void GPIO_FSMC_Configuration(void)
{
	GPIO_InitTypeDef  GPIO_InitStructure;
	RCC_AHB1PeriphClockCmd (RCC_AHB1Periph_GPIOD|RCC_AHB1Periph_GPIOE,ENABLE);
	RCC_AHB3PeriphClockCmd(RCC_AHB3Periph_FSMC, ENABLE);
	/* GPIOD configuration */
  GPIO_PinAFConfig(GPIOD, GPIO_PinSource0, GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource1, GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource4, GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource5, GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource7, GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource8, GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource9, GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource10, GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource14, GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource15, GPIO_AF_FSMC);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_4 | GPIO_Pin_5 | 
                                GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 |
																GPIO_Pin_14 | GPIO_Pin_15;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOD, &GPIO_InitStructure);	
	
	/* GPIOE configuration */
  GPIO_PinAFConfig(GPIOE, GPIO_PinSource3 , GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOE, GPIO_PinSource7 , GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOE, GPIO_PinSource8 , GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOE, GPIO_PinSource9 , GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOE, GPIO_PinSource10 , GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOE, GPIO_PinSource11 , GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOE, GPIO_PinSource12 , GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOE, GPIO_PinSource13 , GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOE, GPIO_PinSource14 , GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOE, GPIO_PinSource15 , GPIO_AF_FSMC);
	
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|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_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOE, &GPIO_InitStructure); 
}
```

```
		FSMC_NORSRAMInitTypeDef  FSMC_NORSRAMInitStructure;
		FSMC_NORSRAMTimingInitTypeDef  readWriteTiming; 
		FSMC_NORSRAMTimingInitTypeDef  writeTiming;
		GPIO_FSMC_Configuration();

readWriteTiming.FSMC_AddressSetupTime = 0x03;	 //地址建立时间（ADDSET）为2个HCLK 1/36M=27ns
		readWriteTiming.FSMC_AddressHoldTime = 0x00;	 //地址保持时间（ADDHLD）模式A未用到	
		readWriteTiming.FSMC_DataSetupTime = 0x0f;		 // 数据保存时间为16个HCLK,因为液晶驱动IC的读数据的时候，速度不能太快，尤其对1289这个IC。
		readWriteTiming.FSMC_BusTurnAroundDuration = 0x01;
		readWriteTiming.FSMC_CLKDivision = 0x00;
		readWriteTiming.FSMC_DataLatency = 0x00;
		readWriteTiming.FSMC_AccessMode = FSMC_AccessMode_A;	 //模式A

writeTiming.FSMC_AddressSetupTime = 0x02;	 //0x01 地址建立时间（ADDSET）为1个HCLK  
		writeTiming.FSMC_AddressHoldTime = 0x00;	 //地址保持时间（A		
		writeTiming.FSMC_DataSetupTime = 0x02;		 ////0x03 数据保存时间为4个HCLK	
		writeTiming.FSMC_BusTurnAroundDuration = 0x01;
		writeTiming.FSMC_CLKDivision = 0x00;
		writeTiming.FSMC_DataLatency = 0x00;
		writeTiming.FSMC_AccessMode = FSMC_AccessMode_A;	 //模式A

FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM1;//  这里我们使用NE1
    FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable; // 不复用数据地址
    FSMC_NORSRAMInitStructure.FSMC_MemoryType =FSMC_MemoryType_SRAM;// FSMC_MemoryType_SRAM;  //SRAM   
    FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;//存储器数据宽度为16bit   
    FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode =FSMC_BurstAccessMode_Disable;// FSMC_BurstAccessMode_Disable; 
    FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
		FSMC_NORSRAMInitStructure.FSMC_AsynchronousWait=FSMC_AsynchronousWait_Disable; 
    FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;   
    FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;  
    FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;	//  存储器写使能
    FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;   
    FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Enable; // 读写使用不同的时序
    FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable; 
    FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &readWriteTiming; //读写时序
    FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &writeTiming;  //写时序

FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);  //初始化FSMC配置

FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM1, ENABLE);  // 使能BANK1 
			 
```

然后第三个问题，地址的设置。
我们用的是Blank1.setctor1 NE1 A19
因此：
#define LCD_CMD              (*((volatile unsigned short *) 0x60000000)) 
#define LCD_DATA               (*((volatile unsigned short *) (0x60000000 | 0x02 << 19)))

然后通过下面的函数可以读到正确的ID，但是继续下去好像就不行了
```		Delay(50); // delay 50 ms 
		LCD_DATA=0x0000;
		LCD_CMD =0x0001;
		Delay(50); // delay 50 ms 
		
 		//ILI9481读ID操作			  	
		LCD_CMD = 0xBF;
		data = LCD_DATA;
		//printf("data:0x%02x
",data);
		data = LCD_DATA;
		//printf("data:0x%02x
",data);
		data = LCD_DATA;
		//printf("data:0x%02x
",data);  	  
		lcddev.id=LCD_DATA;
		//printf("lcddev.id:0x%02x
",lcddev.id);
		lcddev.id <<= 8;
		data = LCD_DATA;
		//printf("data:0x%02x
",data);
		lcddev.id |= data;
		
 	
		printf(" LCD ID:%x
",lcddev.id); //打印LCD ID 
```

想继续初始化LCD然后显示点什么东西的，就还不会了