DSP最小系统设计报告

年4月19日DSP最小系统设计报告文档仅供参考DSP最小系统报告TMS320F2812最小系统1.1TMS320F2812最小系统TMS320F2812的最小系统如图1-1所示。电路主要由TMS320F2812芯片、30MHz有源晶振和电路电源以及电容、电阻电感等少量器件构成。另外，考虑到DSP在下载时需要下载端口，因此在最小系统上加一个14脚的JTAG仿真烧写口。该最小系统不论是在仿真模式下还是在实时模式下，都能够正常运行。一般来说，在设计电源的而过程中，模拟地和数字地最后经过电感连接起来，电源和地经过电容连接起来。图1-1TMS320F2812最小系统1.2电源电路的设计TMS320X2812工作时所要求的电压分为两部分：3.3V的Flash电压和1.8V的内核电压。TMS320X2812对电源很敏感，因此在此推荐选择电压精度比较高的电源芯片TPS767D301或者TPS767D318。TPS767D301芯片的输入电压为+5V，芯片起振，正常工作之后，能够产生3.3V和1.8V的两种电压供DSP使用。图1-2电源电路1.3JTAG下载口电路及复位电路考虑到TPS767D301芯片能够自身产生复位信号，此复位信号可直接供DSP芯片使用，因此不用为DSP设置专门的复位芯片。复位芯片与DSP芯片的连接如上电路图。而对于JTAG电路，在实际设计过程中，需要考虑到JTAG下载口的抗干扰性，在与DSP相连接的端口需要采用上拉设计，JTAG电路如下图所示。图1-3-1JTAG下载口电路图1-3-2复位电路二．外设电路我设计的流水灯电路使用了GPIOA0到GPIOA4的五个端口，其中GPIOA0到GPIOA4的5个IO口输出连接LED的5个灯。最后的实验结果：5个LED灯被循环点亮。图2-1LED流水灯程序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系统初始化函数#include"DSP28_Device.h"////InitSysCtrl:////ThisfunctioninitializestheSystemControlregisterstoaknownstate.//voidInitSysCtrl(void){Uint16i;EALLOW;SysCtrlRegs.WDCR=0x0068;//禁止看门狗模块SysCtrlRegs.PLLCR=0xA;for(i=0;i<5000;i++){}//延时，使得PLL模块能够完成初始化操作//高速时钟预定标器和低速时钟预定标器，产生高速外设时钟HSPCLK和低速外设时钟LSPCLKSysCtrlRegs.HISPCP.all=0x0001;SysCtrlRegs.LOSPCP.all=0x0002; EDIS;}3.3GPIO初始化函数////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主函数#include"DSP28_Device.h" voidmain(void){intkk=0;InitSysCtrl();//初始化系统函数 DINT; IER=Ox0000;//禁止CPU中断 IFR=Ox0000;//清除CPU中断标志InitPieCtrl();//初始化PIE控制寄存器InitPieVectTable();//初始化PIE中断向量表InitGpio();//初始化GPIO口while(1){GpioDataRegs.GPACLEAR.bit.GPIOA0=1;//PWM1引脚输出低电平，LED1灯亮 for(kk=0;kk<100;kk++)delay_loop();//延时保持 GpioDataRegs.GPASET.bit.GPIOA0=1;//PWM1引脚输出高电平，LED1灯灭 for(kk=0;kk<100;kk++)delay_loop();//延时保持 GpioDataRegs.GPACLEAR.bit.GPIOA1=1;//PWM2引脚输出低电平，LED2灯亮 for(kk=0;kk<100;kk++)delay_loop();//延时保持 GpioDataRegs.GPASET.bit.GPIOA1=1;//PWM2引脚输出高电平，LED2灯灭 for(kk=0;kk<100;kk++)delay_loop();//延时保持 GpioDataRegs.GPACLEAR.bit.GPIOA2=1;//PWM3引脚输出低电平，LED3灯亮 for(kk=0;kk<100;kk++)delay_loop();//延时保持 GpioDataRegs.GP