C8051F340单片机SPI串行驱动JCM12232F液晶屏遇到问题

ID:63990 · 发表于 2014-7-14 22:10

程序代码如下，求大神指点

#include "c8051F340.h"
#include "def.h"
//#include "USB_API.h"
#include "intrins.h"
//#endif

// ********************************
// *** 局部常数

// ****** MCU
#define MCU_SYS_CLK (12000000) // clock frequency in MHz
#define MCU_SPI_CLK (1000000) // MCU与RC522之间的通信速率最大为1MHz
#define MCU_UART_RATE (9600) // Baud rate of UART in bps

sbit LCD_CS = P0^7; // LCD片选信号

// ********************************
// *** 全局变量
dbyte KEY_XDATA gRecevBuffer[30] = {0x00};
uint1 gCount = 0;
dbool gCompl = 0;

dvoid McuDelayUs(uint1 aUs)
{
while(aUs--)
{
      _nop_();_nop_();_nop_();_nop_();
      _nop_();_nop_();_nop_();_nop_();
      _nop_();_nop_();_nop_();_nop_();
      _nop_();_nop_();_nop_();_nop_();
}
}

dvoid McuDelayMs(uint1 aMs)
{
   while(aMs--)
   {
      McuDelayUs(1000);
   }
}

void SpiInit()
{
SPI0CFG = 0x60; // 允许主方式
SPI0CN = 0x0D; // 4线单主方式，使能SPI0
SPI0CKR = MCU_SYS_CLK / (2 * MCU_SPI_CLK) - 1; // 注意选择SPI时钟
NSSMD0 = 1; // NSS的输出值由NSSMD0（SPI0CN.2）控制
}

dbyte SpiWrite(dbyte aByte)
{
SPIF = 0;
SPI0DAT = aByte;
while(!SPIF);
SPIF = 0;
return SPI0DAT;
}

dvoid Spi0SelectLcd()
{
NSSMD0 = 0;
}
dvoid Spi0DisableAllDevices()
{
NSSMD0 = 1;
}

// ********************************
// *** 全局函数

dvoid McuInit()
{
PCA0MD &= ~0x40;
EA = 1;
OSCICN |= 0x83; // 内部振荡器使能，SYSCLK为内部振荡器不分频
RSTSRC |= 0x04; // 使能时钟丢失检测器
//-----------------------------------------------------------------------------
// PORT_Init
//-----------------------------------------------------------------------------
// P0.0  -  SCK  (SPI0), Push-Pull,  Digital
// P0.1  -  MISO (SPI0), Open-Drain, Digital
// P0.2  -  MOSI (SPI0), Push-Pull,  Digital
// P0.3  -  NSS  (SPI0), Push-Pull,  Digital
// P0.4  -  TX0  (UART0), Push-Pull,  Digital
// P0.5  -  RX0  (UART0), Open-Drain, Digital
// p2.4  -  RST  (SPI0), Push-Pull,  Digital, skipped
// P0.7  -  LCD_CS(SPI0),Push-Pull,  Digital, skipped
P0MDOUT = 0xDD;
P0SKIP = 0xC0;
P2MDOUT |= 0x10;
P2SKIP |= 0x10;
P4MDOUT |= 0x80;
// P4 &= 0x7f;// 接收
P4 |= 0x80;// 发送
XBR0 = 0x03; // SPI I/O连到端口引脚
XBR1 = 0x40; // 交叉开关使能
//-----------------------------------------------------------------------------
SpiInit();
}

void Lcd_Write(uint1 flag, dbyte command_data)
{
uint1 i_data,temp_data1,temp_data2;

LCD_CS = 1;

if(1 == flag) //flag是1，写入指令
{
      Spi0SelectLcd();
      SpiWrite(0xf8);
      Spi0DisableAllDevices();
}
else       //flag非1，写入数据
{
      Spi0SelectLcd();
      SpiWrite(0xfa);
      Spi0DisableAllDevices();
}

i_data = command_data;
i_data &= 0xf0;

Spi0SelectLcd();
SpiWrite(i_data);
Spi0DisableAllDevices();

i_data = command_data;
temp_data1 = i_data & 0xf0;
temp_data2 = i_data & 0x0f;
temp_data1 >>= 4;
temp_data2 <<= 4;
i_data = temp_data1 | temp_data2;
i_data &= 0xf0;

Spi0SelectLcd();
SpiWrite(i_data);
Spi0DisableAllDevices();

LCD_CS = 0;
McuDelayMs(10);
}

void Lcd_init()
{
uint1 command_data;
McuDelayMs(100);
command_data = 0x30;
Lcd_Write(1,command_data); /*功能设置:一次送8位数据,基本指令集*/
command_data = 0x04;
Lcd_Write(1,command_data); /*点设定:显示字符/光标从左到右移位,DDRAM地址加1*/
command_data = 0x0f;
Lcd_Write(1,command_data); /*显示设定:开显示,显示光标,当前显示位反白闪动*/
command_data = 0x01;
Lcd_Write(1,command_data); /*清DDRAM*/
command_data = 0x02;
Lcd_Write(1,command_data); /*DDRAM地址归位*/
command_data = 0x80;
Lcd_Write(1,command_data); /*把显示地址设为0X80，即为第一行的首位*/
}

void Lcd_Display()
{
uint1 command_data;

command_data = 0x01;
Lcd_Write(1,command_data); /*清DDRAM*/
command_data = 0x80;
Lcd_Write(1,command_data); /*把显示地址设为0X80，即为第一行的首位*/
Lcd_Write(2,'a');
McuDelayMs(3000);
}

int main()
{
McuInit();
Lcd_init();
Lcd_Display();
while(1);
return 0;
}

ID:44262 · 发表于 2014-7-17 16:38

程序运行以后是什么效果？

帐号		自动登录	找回密码
密码			立即注册