利用STM32F417VCT6的FSMC驱动液晶控制器RA8835，自己定义的寄存器，没有采用ST的固件库。

1 STM32F417VCT6与RA8835硬件连接

2 FSMC的初始化

Void InitFsmc(void)

{

  /*
PD15、PD14、PD7、PD5、PD4、PD1、PD0设置为AFIO模式，

其余IO设置为输出模式 */

 
GPIOD->ODR = 0x00000000;

 
GPIOD->MODER = 0xa5559a5a;

 
GPIOD->OTYPER = 0x00000000;

 
GPIOD->OSPEEDR = 0x55555555;  /*
IO速度25MHz */

 
GPIOD->PUPDR = 0x00000000;   
/* 无上、下拉电阻
*/

 
GPIOD->AFR[1] = 0xcc000000;

 
GPIOD->AFR[0] = 0xc0cc00cc;    
/* FSMC复用端口设置为AF12 */

 

 
GPIOE->ODR = 0x00000000;

 
GPIOE->MODER = 0x556a9655;

 
GPIOE->OTYPER = 0x00000000;

 
GPIOE->OSPEEDR = 0x55555555;

 
GPIOE->PUPDR = 0x00000000;

 
GPIOE->AFR[1] = 0x00000ccc;

 
GPIOE->AFR[0] = 0xc00c0000;

 

  /* FSMC BANK1设置为模式1，

写允许，8位数据总线，存储器类型为SRAM，地址数据不复用*/

 
FSMC_Bank1->BCR1 = 0x00001081;

 

/*根据FSMC的时钟频率和RA8835的工作频率设置
*/

FSMC_Bank1->BTR1 = 0x00081000;

}

3 RA8835初始化

根据硬件连接图，RA8835的地址如下：

/* 写指令地址 */

#define  
WriteInstAddr       (volatile
unsigned char *)0x60100000

/* 写数据地址 */

#define  
WriteDataAddr       (volatile
unsigned char *)0x60000000

/* 读状态地址 */

#define  
ReadStatusAddr      (volatile
unsigned char *)0x60000000

/* 读数据地址 */

#define  
ReadDataAddr        (volatile
unsigned char *)0x60100000

RA8835的初始化程序如下：

/* 系统设置参数 */

unsigned char SysTab[] =
{0x30,0x07,0x0f,0x27,0x48,0xf0,0x30,0x00};

/* 显示控制参数 */

unsigned char ScrTab[] =
{0x00,0x00,0xf0,0x00,0x40,0xf0,0x00,0x80,0x00,0x00};

Void InitRa8835(void)

{

 
unsigned char Count;

 

 
*WriteInstAddr = 0x40;  /* 系统设置 */

 
for(Count=0;Count<=7;Count++)

  {

   
*WriteDataAddr = SysTab[Count];

  }

 
*WriteInstAddr = 0x44;  /* 显示控制 */

 
for(Count=0;Count<=9;Count++)

  {

   
*WriteDataAddr = ScrTab[Count];

  }

 
*WriteInstAddr = 0x5d;

 
*WriteDataAddr = 0x07;

 
*WriteDataAddr = 0x8b;

 
*WriteInstAddr = 0x5a;

 
*WriteDataAddr = 0x00;

 
*WriteInstAddr = 0x5b;

 
*WriteDataAddr = 0x0c;

 
*WriteInstAddr = 0x59;

 
*WriteDataAddr = 0x54;

}