国产毛片a精品毛-国产毛片黄片-国产毛片久久国产-国产毛片久久精品-青娱乐极品在线-青娱乐精品

電子工程網(wǎng)

標(biāo)題: DSP5402之McBSP從設(shè)備SPI硬件四種模式配置實(shí)例(經(jīng)過硬件測試) [打印本頁]

作者: HotTiDSP 時(shí)間: 2009-4-2 22:01
標(biāo)題: DSP5402之McBSP從設(shè)備SPI硬件四種模式配置實(shí)例(經(jīng)過硬件測試)
搜索"C5402def.h"看看~~~簡單明了~~~
雖然C5402cfg.h/c5402cfg.c"更強(qiáng)大，俺暫不想發(fā)布~~~

void McBSPObj::McBSP0Init(void)//McBSP從設(shè)備SPI硬件配置
{
/*-------------------------------------------------------------
  DSP5402之McBSP從設(shè)備SPI硬件四種模式配置實(shí)例(經(jīng)過硬件測試)
--------------------------------------------------------------*/
//PCR設(shè)置過程(FSM=0,CLKM=0)
  McBSP0->SPSA = PCR;
  McBSP1->SPSD = (0 << PCR_XIOEN) //發(fā)送非通用I/O模式位
            | (0 << PCR_RIOEN) //接收非通用I/O模式位
            | (0 << PCR_FSXM)  //外部發(fā)送幀同步脈沖(外部片選)
            | (0 << PCR_FSRM)  //外部接收幀同步脈沖(外部片選)
            | (0 << PCR_CLKXM) //外部發(fā)送時(shí)鐘(外部時(shí)鐘源)
            | (0 << PCR_CLKRM) //外部接收時(shí)鐘(外部時(shí)鐘源)
#if SPIMODE == 0
//SPI設(shè)置過程00(0--FS高電平有效,0--CLK上升沿收發(fā)數(shù)據(jù))

            | (0 << PCR_FSXP)  //發(fā)送幀同步脈沖極性(高電平有效)
            | (0 << PCR_FSRP)  //接收幀同步脈沖極性(高電平有效)
            | (0 << PCR_CLKXP) //發(fā)送時(shí)鐘極性(上升沿發(fā)送數(shù)據(jù))
            | (0 << PCR_CLKRP);//接收時(shí)鐘極性(上升沿接收數(shù)據(jù))
#endif
#if SPIMODE == 1
//SPI設(shè)置過程01(0--FS高電平有效,1--CLK下降沿收發(fā)數(shù)據(jù))
            | (0 << PCR_FSXP)  //發(fā)送幀同步脈沖極性(高電平有效)
            | (0 << PCR_FSRP)  //接收幀同步脈沖極性(高電平有效)
            | (1 << PCR_CLKXP) //發(fā)送時(shí)鐘極性(下降沿發(fā)送數(shù)據(jù))
            | (1 << PCR_CLKRP);//接收時(shí)鐘極性(下降沿接收數(shù)據(jù))
#endif
#if SPIMODE == 2
//SPI設(shè)置過程10(1--FS低電平有效,0--CLK上升沿收發(fā)數(shù)據(jù))
            | (1 << PCR_FSXP)  //發(fā)送幀同步脈沖極性(低電平有效)
            | (1 << PCR_FSRP)  //接收幀同步脈沖極性(低電平有效)
            | (0 << PCR_CLKXP) //發(fā)送時(shí)鐘極性(上升沿發(fā)送數(shù)據(jù))
            | (0 << PCR_CLKRP);//接收時(shí)鐘極性(上升沿接收數(shù)據(jù))
#endif
#if SPIMODE == 3
//SPI設(shè)置過程11(1--FS低電平有效,1--CLK下降沿收發(fā)數(shù)據(jù))
            | (1 << PCR_FSXP)  //發(fā)送幀同步脈沖極性(低電平有效)
            | (1 << PCR_FSRP)  //接收幀同步脈沖極性(低電平有效)
            | (1 << PCR_CLKXP) //發(fā)送時(shí)鐘極性(下降沿發(fā)送數(shù)據(jù))
            | (1 << PCR_CLKRP);//接收時(shí)鐘極性(下降沿接收數(shù)據(jù))
#endif
//MCR1設(shè)置過程(RMCM=0)
  McBSP0->SPSA = MCR1;//
  McBSP0->SPSD = (0 << MCR1_RMCM) //允許接收多通道選擇(0)
            | (0x00 << MCR1_RPBBLK)
            | (0x00 << MCR1_RPABLK)
            | (0x00 << MCR1_RCBLK);
//MCR2設(shè)置過程(XMCM=0)
  McBSP0->SPSA = MCR2;//
  McBSP0->SPSD = (0x00 << MCR2_XMCM) //允許發(fā)送多通道選擇(00b)
            | (0x00 << MCR2_XPBBLK)
            | (0x00 << MCR2_XPABLK)
            | (0x00 << MCR2_XCBLK);

//RCERA設(shè)置過程
  McBSP0->SPSA = RCERA;//
  McBSP0->SPSD = 0;

//RCERB設(shè)置過程
  McBSP0->SPSA = RCERB;//
  McBSP0->SPSD = 0;

//XCERA設(shè)置過程
  McBSP0->SPSA = XCERA;//
  McBSP0->SPSD = 0;

//XCERB設(shè)置過程
  McBSP0->SPSA = XCERB;//
  McBSP0->SPSD = 0;

//XCR1設(shè)置過程
  McBSP0->SPSA = XCR1;//
  McBSP0->SPSD = (0x00 << XCR1_XFRLEN1) //每幀1個(gè)字(每幀中斷的次數(shù)1!!!)
//             | (0x02 << XCR1_XWDLEN1);//每字16位長(每次中斷的字節(jié)數(shù)2!!!)
            | (0x00 << XCR1_XWDLEN1);//每字8位長(每次中斷的字節(jié)數(shù)2!!!)
//XCR2設(shè)置過程
  McBSP0->SPSA = XCR2;
  McBSP0->SPSD = (0 << XCR2_XPHASE) //單相幀(其他設(shè)置都為0)
            | (0x00 << XCR2_XCOMPAND)//發(fā)送數(shù)據(jù)從最高位(MSB)開始
            | (0x00 << XCR2_XDATDLY);//同步后延遲0位數(shù)據(jù)
//RCR1設(shè)置過程
  McBSP0->SPSA = RCR1;
  McBSP0->SPSD = (0x00 << RCR1_RFRLEN1) //每幀1個(gè)字(每幀中斷的次數(shù)1!!!)
//             | (0x02 << RCR1_RWDLEN1);//每字16位長(每次中斷的字節(jié)數(shù)2!!!)
            | (0x00 << RCR1_RWDLEN1);//每字8位長(每次中斷的字節(jié)數(shù)2!!!)
//RCR2設(shè)置過程
  McBSP0->SPSA = RCR2;
  McBSP0->SPSD = (0 << RCR2_RPHASE) //單相幀(其他設(shè)置都為0)
            | (0x00 << RCR2_RCOMPAND)//接收數(shù)據(jù)從最高位(MSB)開始
            | (0x00 << RCR2_RDATDLY);//同步后延遲0位數(shù)據(jù)
//SRGR1設(shè)置過程
  McBSP0->SPSA = SRGR1;
  McBSP0->SPSD = (0x00 << SRGR1_CLKGDV);//1
//SRGR2設(shè)置過程
  McBSP0->SPSA = SRGR2;
  McBSP0->SPSD = (0 << SRGR2_FSGM)
            | (1 << SRGR2_CLKSM)//由CPU時(shí)鐘產(chǎn)生的采樣率時(shí)鐘1
            | (0 << SRGR2_CLKSP)//0
            | (1 << SRGR2_GSYNC)//
            | (0x0f << SRGR2_FPER);//0x0f
//SPCR1設(shè)置過程(CLKSTP=1Xb,RINTM=00b)
  McBSP0->SPSA = SPCR1;
  McBSP0->SPSD = (0x00 << SPCR1_RINTM)  //接收中斷模式00(每幀接收1次中?
                           | (0 << SPCR1_DLB)    //禁止回送
            | (1 << SPCR1_DXENA)    //DX使能
            | (0x00 << SPCR1_RJUST)  //接收符號(hào)不擴(kuò)展
            | (0x02 << SPCR1_CLKSTP);//SPI模式時(shí)鐘開始于上升沿（無延遲）
//SPCR2設(shè)置過程(XINTM=02b)
  McBSP0->SPSA = SPCR2;
  McBSP0->SPSD = (0x02 << SPCR2_XINTM)//發(fā)送中斷模式02
            | (1 << SPCR2_XEMPTY)  //發(fā)送移位寄存器空
            | (1 << SPCR2_XRDY); //發(fā)送準(zhǔn)備好
//SPCR1復(fù)位過程
  McBSP0->SPSA = SPCR1;
  McBSP0->SPSD|= (1 << SPCR1_RRST);//接收器復(fù)位
//SPCR2復(fù)位過程
  McBSP0->SPSA = SPCR2;
  McBSP0->SPSD|= (1 << SPCR2_XRST)//發(fā)送器復(fù)位
            | (1 << SPCR2_GRST)//采樣率發(fā)生器復(fù)位
            | (1 << SPCR2_FRST);//幀同步發(fā)生器復(fù)位
//清除允許BXINT0中斷過程
//  SREG->IFR = (1 << IFR_BXINT0);//清除BXINT0中斷標(biāo)志
//  SREG->IMR |= (1 << IMR_BXINT0);//允許BXINT0中斷
//清除允許BRINT0中斷過程
  SREG->IFR = (1 << IFR_BRINT0);//清除BRINT0中斷標(biāo)志
  SREG->IMR |= (1 << IMR_BRINT0);//允許BRINT0中斷
}

void McBSPObj::McBSP1Init(void)//GPIO配置
{
  McBSP1->SPSA = SPCR1;
  McBSP1->SPSD = 0;
  McBSP1->SPSA = SPCR2;
  McBSP1->SPSD = 0;
  McBSP1->SPSA = PCR;
//設(shè)置收發(fā)為IO接口,DX輸出,DR,CLKS輸入
  McBSP1->SPSD = (1 << PCR_RIOEN) //通用I/O模式位
//硬件RDDOG喂狗信號(hào)(BDX1)管腳輸出模式默認(rèn)I/O設(shè)置
            | (1 << PCR_XIOEN) //通用I/O模式位
//硬件RD SIA信號(hào)(BFSR1)管腳輸入模式設(shè)置
            | (0 << PCR_FSRM) //FSR為輸入IO
//硬件FM CE信號(hào)(BFSX1)管腳輸出模式設(shè)置
            | (1 << PCR_FSXM) //FSR為輸出IO,FLASH的片選信號(hào)
//硬件FM CE信號(hào)(BFSX1)管腳高電平輸出控制
            | (1 << PCR_FSXP) //關(guān)閉FLASH的片選信號(hào)(FSX=1)
            | (0 << PCR_CLKRM) //CLKR為輸入IO
            | (0 << PCR_CLKXM);  //CLKX為輸入IO,CLKX信號(hào)
}

菜農(nóng)HotPower@126.com

歡迎光臨電子工程網(wǎng) (http://m.qingdxww.cn/)