DSP最小專業(yè)系統(tǒng)設(shè)計方案報告

DSP最小系統(tǒng)匯報TMS320F2812最小系統(tǒng)1.1TMS320F2812最小系統(tǒng)TMS320F2812最小系統(tǒng)圖1-1所表示。電路關(guān)鍵由TMS320F2812芯片、30MHz有源晶振和電路電源和電容、電阻電感等少許器件組成。另外，考慮到DSP在下載時需要下載端口，所以在最小系統(tǒng)上加一個14腳JTAG仿真燒寫口。該最小系統(tǒng)不管是在仿真模式下還是在實時模式下，全部能夠正常運行。通常來說，在設(shè)計電源而過程中，模擬地和數(shù)字地最終經(jīng)過電感連接起來，電源和地經(jīng)過電容連接起來。圖1-1TMS320F2812最小系統(tǒng)1.2電源電路設(shè)計TMS320X2812工作時所要求電壓分為兩部分：3.3VFlash電壓和1.8V內(nèi)核電壓。TMS320X2812對電源很敏感，所以在此推薦選擇電壓精度比較高電源芯片TPS767D301或TPS767D318。TPS767D301芯片輸入電壓為+5V，芯片起振，正常工作以后，能夠產(chǎn)生3.3V和1.8V兩種電壓供DSP使用。圖1-2電源電路1.3JTAG下載口電路及復(fù)位電路考慮到TPS767D301芯片能夠本身產(chǎn)生復(fù)位信號，此復(fù)位信號可直接供DSP芯片使用，所以不用為DSP設(shè)置專門復(fù)位芯片。復(fù)位芯片和DSP芯片連接如上電路圖。而對于JTAG電路，在實際設(shè)計過程中，需要考慮到JTAG下載口抗干擾性，在和DSP相連接端口需要采取上拉設(shè)計，JTAG電路以下圖所表示。圖1-3-1JTAG下載口電路圖1-3-2復(fù)位電路二．外設(shè)電路我設(shè)計流水燈電路使用了GPIOA0到GPIOA4五個端口，其中GPIOA0到GPIOA45個IO口輸出連接LED5個燈。最終試驗結(jié)果：5個LED燈被循環(huán)點亮。圖2-1LED流水燈程序3.1CMD文件MEMORY{PAGE0:PRAMH0:origin=0x3f8000,length=0x001000PAGE1:/*SARAM*/RAMM0:origin=0x000000,length=0x000400RAMM1:origin=0x000400,length=0x000400/*PeripheralFrame0:*/DEV_EMU:origin=0x000880,length=0x000180FLASH_REGS:origin=0x000A80,length=0x000060CSM:origin=0x000AE0,length=0x000010XINTF:origin=0x000B20,length=0x000020CPU_TIMER0:origin=0x000C00,length=0x000008CPU_TIMER1:origin=0x000C08,length=0x000008 CPU_TIMER2:origin=0x000C10,length=0x000008 PIE_CTRL:origin=0x000CE0,length=0x000020PIE_VECT:origin=0x000D00,length=0x000100/*PeripheralFrame1:*/ECAN_A:origin=0x006000,length=0x000100ECAN_AMBOX:origin=0x006100,length=0x000100/*PeripheralFrame2:*/SYSTEM:origin=0x007010,length=0x000020SPI_A:origin=0x007040,length=0x000010SCI_A:origin=0x007050,length=0x000010XINTRUPT:origin=0x007070,length=0x000010GPIOMUX:origin=0x0070C0,length=0x000020GPIODAT:origin=0x0070E0,length=0x000020ADC:origin=0x007100,length=0x000020EV_A:origin=0x007400,length=0x000040EV_B:origin=0x007500,length=0x000040SPI_B:origin=0x007740,length=0x000010SCI_B:origin=0x007750,length=0x000010MCBSP_A:origin=0x007800,length=0x000040/*CSMPasswordLocations*/CSM_PWL:origin=0x3F7FF8,length=0x000008/*SARAM*/DRAMH0:origin=0x3f9000,length=0x001000}SECTIONS{/*Allocateprogramareas:*/.reset:>PRAMH0,PAGE=0.text:>PRAMH0,PAGE=0.cinit:>PRAMH0,PAGE=0/*Allocatedataareas:*/.stack:>RAMM1,PAGE=1.bss:>DRAMH0,PAGE=1.ebss:>DRAMH0,PAGE=1.const:>DRAMH0,PAGE=1.econst:>DRAMH0,PAGE=1.sysmem:>DRAMH0,PAGE=1/*AllocatePeripheralFrame0RegisterStructures:*/DevEmuRegsFile:>DEV_EMU,PAGE=1FlashRegsFile:>FLASH_REGS,PAGE=1CsmRegsFile:>CSM,PAGE=1XintfRegsFile:>XINTF,PAGE=1CpuTimer0RegsFile:>CPU_TIMER0,PAGE=1CpuTimer1RegsFile:>CPU_TIMER1,PAGE=1CpuTimer2RegsFile:>CPU_TIMER2,PAGE=1PieCtrlRegsFile:>PIE_CTRL,PAGE=1PieVectTable:>PIE_VECT,PAGE=1/*AllocatePeripheralFrame2RegisterStructures:*/ECanaRegsFile:>ECAN_A,PAGE=1ECanaMboxesFile:>ECAN_AMBOXPAGE=1/*AllocatePeripheralFrame1RegisterStructures:*/SysCtrlRegsFile:>SYSTEM,PAGE=1SpiaRegsFile:>SPI_A,PAGE=1SciaRegsFile:>SCI_A,PAGE=1XIntruptRegsFile:>XINTRUPT,PAGE=1GpioMuxRegsFile:>GPIOMUX,PAGE=1GpioDataRegsFile:>GPIODATPAGE=1AdcRegsFile:>ADC,PAGE=1EvaRegsFile:>EV_A,PAGE=1EvbRegsFile:>EV_B,PAGE=1ScibRegsFile:>SCI_B,PAGE=1McbspaRegsFile:>MCBSP_A,PAGE=1/*CSMPasswordLocations*/CsmPwlFile:>CSM_PWL,PAGE=1}3.2系統(tǒng)初始化函數(shù)#include"DSP28_Device.h"http:////InitSysCtrl:////ThisfunctioninitializestheSystemControlregisterstoaknownstate.//voidInitSysCtrl(void){Uint16i;EALLOW;SysCtrlRegs.WDCR=0x0068;//嚴(yán)禁看門狗模塊SysCtrlRegs.PLLCR=0xA;for(i=0;i<5000;i++){}//延時，使得PLL模塊能夠完成初始化操作//高速時鐘預(yù)定標(biāo)器和低速時鐘預(yù)定標(biāo)器，產(chǎn)生高速外設(shè)時鐘HSPCLK和低速外設(shè)時鐘LSPCLKSysCtrlRegs.HISPCP.all=0x0001;SysCtrlRegs.LOSPCP.all=0x0002; EDIS;}3.3GPIO初始化函數(shù)////TMDXALPHARELEASE//Intendedforproductevaluationpurposes////###########################################################################////FILE: DSP28_Gpio.c////TITLE: DSP28GeneralPurposeI/OInitialization&SupportFunctions.////###########################################################################////Ver|ddmmmyyyy|Who|Descriptionofchanges//=====|=============|======|===============================================//0.55|06May|L.H.|EzDSPAlphaRelease//0.56|20May|L.H.|Nochange//0.57|27May|L.H.|Nochange//############################################################################include"DSP28_Device.h" ////InitGpio:////ThisfunctioninitializestheGpiotoaknownstate.//voidInitGpio(void){EALLOW; GpioMuxRegs.GPAMUX.bit.PWM1GPIOA0=0; GpioMuxRegs.GPADIR.bit.GPIOA0=1; GpioMuxRegs.GPAMUX.bit.PWM2GPIOA1=0; GpioMuxRegs.GPADIR.bit.GPIOA1=1;GpioMuxRegs.GPAMUX.bit.PWM3GPIOA2=0; GpioMuxRegs.GPADIR.bit.GPIOA2=1; GpioMuxRegs.GPAMUX.bit.PWM4GPIOA3=0; GpioMuxRegs.GPADIR.bit.GPIOA3=1;GpioMuxRegs.GPAMUX.bit.PWM5GPIOA4=0; GpioMuxRegs.GPADIR.bit.GPIOA4=1;EDIS;} 3.4主函數(shù)#include"DSP28_Device.h" voidmain(void){intkk=0;InitSysCtrl();//初始化系統(tǒng)函數(shù) DINT; IER=Ox0000;//嚴(yán)禁CPU中止 IFR=Ox0000;//清除CPU中止標(biāo)志InitPieCtrl();//初始化PIE控制寄存器InitPieVectTable();//初始化PIE中止向量表InitGpio();//初始化GPIO口while(1){GpioDataRegs.GPACLEAR.bit.GPIOA0=1;//PWM1引腳輸出低電平，LED1燈亮 for(kk=0;kk<100;kk++)delay_loop();//延時保持 GpioDataRegs.GPASET.bit.GPIOA0=1;//PWM1引腳輸出高電平，LED1燈滅 for(kk=0;kk<100;kk++)delay_loop();//延時保持 GpioDataRegs.GPACLEAR.bit.GPIOA1=1;//PWM2引腳輸出低電平，LED2燈亮 for(kk=0;kk<100;kk++)delay_loop();//延時保持 GpioDataRegs.GPASET.bit.GPIOA1=1;//PWM2引腳輸出高電平，LED2燈滅 for(kk=0;kk<100;kk++)delay_loop();//延時保持 GpioDataRegs.GPACLEAR.bit.GPIOA2=1;//PWM3引腳輸出低電平，LED3燈亮 for(kk=0;kk<100;kk++)delay_loop();//延時保持 GpioDataRegs.GPASET.