piectrl_bios.c

来自「DSP_UCOS_run_in_flash_nonBIOS」· C语言 代码 · 共 66 行

/**********************************************************************
* File: PieCtrl_BIOS.c
* Devices: TMS320F2833x
* Author: David M. Alter, Texas Instruments Inc.
* History:
*   12/18/07 - original (D. Alter)
**********************************************************************/
#include "DSP2833x_Device.h"			// Peripheral address definitions
#include "F28335_example.h"				// Main include file


/**********************************************************************
* Function: InitPieCtrl()
*
* Description: Initializes and enables the PIE interrupts on the F280x.
**********************************************************************/
void InitPieCtrl(void)
{
//--- Disable interrupts
	asm(" SETC INTM, DBGM");			// Disable global interrupts

//--- Initialize the PIE_RAM
	PieCtrlRegs.PIECTRL.bit.ENPIE = 0;	// Disable the PIE
	asm(" EALLOW");						// Enable EALLOW protected register access
	memcpy(&hwi_vec_runstart, &hwi_vec_loadstart, &hwi_vec_loadend - &hwi_vec_loadstart);
	asm(" EDIS");						// Disable EALLOW protected register access

//--- Disable all PIE interrupts
	PieCtrlRegs.PIEIER1.all =  0x0000;
	PieCtrlRegs.PIEIER2.all =  0x0000;
	PieCtrlRegs.PIEIER3.all =  0x0000;
	PieCtrlRegs.PIEIER4.all =  0x0000;
	PieCtrlRegs.PIEIER5.all =  0x0000;
	PieCtrlRegs.PIEIER6.all =  0x0000;
	PieCtrlRegs.PIEIER7.all =  0x0000;
	PieCtrlRegs.PIEIER8.all =  0x0000;
	PieCtrlRegs.PIEIER9.all =  0x0000;
	PieCtrlRegs.PIEIER10.all = 0x0000;
	PieCtrlRegs.PIEIER11.all = 0x0000;
	PieCtrlRegs.PIEIER12.all = 0x0000;

//--- Clear any potentially pending PIEIFR flags
	PieCtrlRegs.PIEIFR1.all  = 0x0000;
	PieCtrlRegs.PIEIFR2.all  = 0x0000;
	PieCtrlRegs.PIEIFR3.all  = 0x0000;	
	PieCtrlRegs.PIEIFR4.all  = 0x0000;
	PieCtrlRegs.PIEIFR5.all  = 0x0000;
	PieCtrlRegs.PIEIFR6.all  = 0x0000;
	PieCtrlRegs.PIEIFR7.all  = 0x0000;
	PieCtrlRegs.PIEIFR8.all  = 0x0000;
	PieCtrlRegs.PIEIFR9.all  = 0x0000;
	PieCtrlRegs.PIEIFR10.all = 0x0000;
	PieCtrlRegs.PIEIFR11.all = 0x0000;
	PieCtrlRegs.PIEIFR12.all = 0x0000;

//--- Acknowlege all PIE interrupt groups
	PieCtrlRegs.PIEACK.all = 0xFFFF;

//--- Enable the PIE
	PieCtrlRegs.PIECTRL.bit.ENPIE = 1;		// Enable the PIE

} // end of InitPieCtrl()


//--- end of file -----------------------------------------------------