fft.rar_ 2812 FFT_2812_2812 正弦_fft_正弦波fft

// // TMDX ALPHA RELEASE // Intended for product evaluation purposes // //########################################################################### // // FILE: DSP28_SysCtrl.c // // TITLE: DSP28 Device System Control Initialization & Support Functions. // //########################################################################### // // Ver | dd mmm yyyy | Who | Description of changes // =====|=============|======|=============================================== // 0.55| 06 May 2002 | L.H. | EzDSP Alpha Release // 0.56| 20 May 2002 | L.H. | No change // 0.57| 24 May 2002 | L.H. | Added initialization of RAM control registers // | | | for TMX samples. // 0.58| 29 Jun 2002 | L.H. | Added InitFlash function. Must be run from RAM //########################################################################### #include "DSP28_Device.h" // Functions that will be run from RAM need to be assigned to // a different section. This section will then be mapped using // the linker cmd file. #pragma CODE_SECTION(InitFlash, "ramfuncs"); //--------------------------------------------------------------------------- // InitSysCtrl: //--------------------------------------------------------------------------- // This function initializes the System Control registers to a known state. // void InitSysCtrl(void) { Uint16 i; EALLOW; // On TMX samples, to get the best performance of on chip RAM blocks M0/M1/L0/L1/H0 internal // control registers bit have to be enabled. The bits are in Device emulation registers. DevEmuRegs.M0RAMDFT = 0x0300; DevEmuRegs.M1RAMDFT = 0x0300; DevEmuRegs.L0RAMDFT = 0x0300; DevEmuRegs.L1RAMDFT = 0x0300; DevEmuRegs.H0RAMDFT = 0x0300; // Disable watchdog module SysCtrlRegs.WDCR= 0x0068; // Initalize PLL SysCtrlRegs.PLLCR = 0xA; // Wait for PLL to lock for(i= 0; i< 5000; i++){} // HISPCP/LOSPCP prescale register settings, normally it will be set to default values SysCtrlRegs.HISPCP.all = 0x0001; SysCtrlRegs.LOSPCP.all = 0x0002; // Peripheral clock enables set for the selected peripherals. SysCtrlRegs.PCLKCR.bit.EVAENCLK=1; SysCtrlRegs.PCLKCR.bit.EVBENCLK=1; SysCtrlRegs.PCLKCR.bit.SCIENCLKA=1; SysCtrlRegs.PCLKCR.bit.SCIENCLKB=1; SysCtrlRegs.PCLKCR.bit.MCBSPENCLK=1; SysCtrlRegs.PCLKCR.bit.SPIENCLK=1; SysCtrlRegs.PCLKCR.bit.ECANENCLK=1; SysCtrlRegs.PCLKCR.bit.ADCENCLK=1; EDIS; } // This function initializes the Flash Control registers // CAUTION // This function MUST be executed out of RAM. Executing it // out of OTP/Flash will yield unpredictable results void InitFlash(void) { EALLOW; //Enable Flash Pipeline mode to improve performance //of code executed from Flash. FlashRegs.FOPT.bit.ENPIPE = 1; // CAUTION //Minimum waitstates required for the flash operating //at a given CPU rate must be characterized by TI. //Refer to the datasheet for the latest information. //Set the Random Waitstate for the Flash FlashRegs.FBANKWAIT.bit.RANDWAIT = 5; //Set the Paged Waitstate for the Flash FlashRegs.FBANKWAIT.bit.PAGEWAIT = 5; // CAUTION //Minimum cycles required to move between power states //at a given CPU rate must be characterized by TI. //Refer to the datasheet for the latest information. //For now use the default count //Set number of cycles to transition from sleep to standby FlashRegs.FSTDBYWAIT.bit.STDBYWAIT = 0x01FF; //Set number of cycles to transition from standby to active FlashRegs.FACTIVEWAIT.bit.ACTIVEWAIT = 0x01FF; EDIS; } //--------------------------------------------------------------------------- // KickDog: //--------------------------------------------------------------------------- // This function resets the watchdog timer. // Enable this function for using KickDog in the application /* void KickDog(void) { EALLOW; SysCtrlRegs.WDKEY = 0x0055; SysCtrlRegs.WDKEY = 0x00AA; EDIS; } */ //=========================================================================== // No more. //===========================================================================