28335用McBSP口接12864LCD

只看该作者 · 2013-7-5 09:05

大家是否有用28335的McBSP口接12864LCD？是否把MCLKXx 连到SCLK，MDXx连接到SID，然后CS再选个IO口操作一下，就可以了？

下图为12864三线制连接工作时序。

G:\编码器\编码器标定系统V2.0开发\器件选型\液晶显示器\2.JPG

2万 · 2013-7-5 13:15

28335的McBSP接口完全可以模拟SPI接口  CS端也不需要你用IO口模拟的
查找一下这方面的资料
可以参考一下下面的代码
void LcdObj:lcdSpiSetup(void)
{
#if (ccsdebug == 0)
/*-----------------------------------------------------------
  硬件McBSP模块配置为SPI接口
实验目的：
  演练硬件McBSP模块配置为SPI接口的应用。
------------------------------------------------------------*/
  McBSP1->SPSA = SPCR1;
  McBSP1->SPSD = 0;
//  McBSP1->SPSD &= ~(1 << SPCR1_RRST);//禁止串口接收
  _delay_loop_(1);//延时等待
  McBSP1->SPSA = SPCR2;
  McBSP1->SPSD = 0;
//  McBSP1->SPSD &= ~(1 << SPCR2_XRST);//禁止串口发送
  _delay_loop_(1);//延时等待
  McBSP1->SPSA = SPCR1;
  McBSP1->SPSD = (0x02 << SPCR1_CLKSTP);//CLKSTP=10b
  _delay_loop_(1);//延时等待
  McBSP1->SPSA = PCR;
  McBSP1->SPSD = (1 << PCR_FSXM)  //设置FSX引脚为输出，控制LCD12864的片选信号SS
            | (0 << PCR_FSXP)  //FSX引脚平时输出低电平(LCD12864的片选信号SS无效)
            | (1 << PCR_CLKXM) //设置CLKX引脚为输出
            | (1 << PCR_CLKXP);//CLKXP引脚平时输出高电平
  _delay_loop_(1);//延时等待
  McBSP1->SPSA = SRGR1;
  McBSP1->SPSD = (0x07 << SRGR1_FWID) //0x00~0x07~0xff
            | (0x80 << SRGR1_CLKGDV);//速率0x80
  _delay_loop_(1);//延时等待
  McBSP1->SPSA = SRGR2;
  McBSP1->SPSD = (1 << SRGR2_CLKSM);//
  _delay_loop_(1);//延时等待
  McBSP1->SPSA = RCR1;
  McBSP1->SPSD = (0x00 << RCR1_RFRLEN1);//8BIT
  _delay_loop_(1);//延时等待
  McBSP1->SPSA = XCR1;//延时等待
  McBSP1->SPSD = (0x00 << XCR1_RFRLEN1);//8BIT
  _delay_loop_(1);//延时等待
  McBSP1->SPSA = RCR2;
  McBSP1->SPSD = (0x02 << RCR2_RDATDLY);//0x01
  _delay_loop_(1);//延时等待
  McBSP1->SPSA = XCR2;
  McBSP1->SPSD = (0x02 << XCR2_RDATDLY);//0x01
  _delay_loop_(1);//延时等待
  McBSP1->SPSA = SPCR2;
  McBSP1->SPSD |= (1 << SPCR2_GRST) | (1 << SPCR2_XRST) | (1 << SPCR2_FRST);
  _delay_loop_(1);//延时等待
#else
/*-----------------------------------------------------------
  硬件McBSP模块配置为普通IO软件模拟SPI时序
实验目的：
  演练硬件McBSP模块配置为普通IO的应用.以备IO紧缺时急用。
------------------------------------------------------------*/
  McBSP1->SPSA = SPCR1;
  McBSP1->SPSD = 0;
  McBSP1->SPSD &= ~(1 << SPCR1_RRST);//禁止串口接收
  McBSP1->SPSA = SPCR2;
  McBSP1->SPSD = 0;
  McBSP1->SPSD &= ~(1 << SPCR2_XRST);//禁止串口发送
  McBSP1->SPSA = PCR;
  McBSP1->SPSD = (1 << PCR_XIOEN) | (1 << PCR_RIOEN);//设置收发为IO接口,DX输出,DR,CLKS输入
  McBSP1->SPSD |= (1 << PCR_FSXM) | (1 << PCR_CLKXM);//设置FSX,CLKX可做IO输出
  McBSP1->SPSD |= (1 << PCR_FSRM) | (1 << PCR_CLKRM);//设置FSR,CLKR可做IO输出
  McBSP1->SPSD &= ~(1 << PCR_FSXP);//FSX信号=0
  McBSP1->SPSD |= (1 << PCR_CLKXP);//CLKX信号=1
  McBSP1->SPSD |= (1 << PCR_DX_STAT);//DX信号=1
#endif
}

void LcdObj:lcdSend(unsigned char cData)
{
  cData &= 0xff;
#if (ccsdebug == 0)
  McBSP1->DXR1 = cData;//发送串行数据或命令
  _delay_loop_(1);//延时等待
  McBSP1->SPSA = SPCR2;
  while((McBSP1->SPSD & (1 << SPCR2_XRDY)) == 0) {//等待发送结束
__nop();
__nop();
  }
  _delay_loop_(1);//延时等待
#else
unsigned int i;
  McBSP1->SPSA = PCR;
  for (i = 0; i < 8; i ++) {
McBSP1->SPSD &= ~(1 << PCR_CLKXP);//CLKX信号=0
_delay_loop_(1);//延时等待
if (cData & 0x80) {//MSB最高位为1时
   McBSP1->SPSD |= (1 << PCR_DX_STAT);//DX信号=1
}
else {
   McBSP1->SPSD &= ~(1 << PCR_DX_STAT);//DX信号=0
}
cData <<= 1;
_delay_loop_(1);//延时等待
McBSP1->SPSD |= (1 << PCR_CLKXP);//CLKX信号=1
_delay_loop_(1);//延时等待
  }
  McBSP1->SPSD |= (1 << PCR_DX_STAT);//DX信号=1
  _delay_loop_(1);//延时等待
#endif
}

28335用McBSP口接12864LCD

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