📄 dsp281x_init.c
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// dsp281x_init.c
// By RealSYS
#include "..\DSP281x_Device.h"
#include "..\DSP281x_Examples.h" // DSP281x Examples Include File
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
// Example: 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;
}
//---------------------------------------------------------------------------
// Example: DisableDog:
//---------------------------------------------------------------------------
// This function disables the watchdog timer.
void DisableDog(void)
{
EALLOW;
SysCtrlRegs.WDCR= 0x0068;
EDIS;
}
//---------------------------------------------------------------------------
// Example: InitPll:
//---------------------------------------------------------------------------
// This function initializes the PLLCR register.
void InitPll(Uint16 val)
{
volatile Uint16 iVol;
if (SysCtrlRegs.PLLCR.bit.DIV != val)
{
EALLOW;
SysCtrlRegs.PLLCR.bit.DIV = val;
EDIS;
// Optional: Wait for PLL to lock.
// During this time the CPU will switch to OSCCLK/2 until the PLL is
// stable. Once the PLL is stable the CPU will switch to the new PLL value.
//
// This switch time is 131072 CLKIN cycles as of Rev C silicon.
//
// Code is not required to sit and wait for the PLL to lock.
// However, if the code does anything that is timing critical,
// and requires the correct clock be locked, then it is best to
// wait until this switching has completed.
// If this function is run from waitstated memory, then the loop count can
// be reduced as long as the minimum switch time is still met.
// iVol is volatile so the compiler will not optimize this loop out
//
// The watchdog should be disabled before this loop, or fed within
// the loop.
DisableDog();
// Wait lock cycles.
// Note, This loop is tuned to 0-waitstate RAM memory. If this
// function is run from wait-stated memory such as Flash or XINTF,
// then the number of times through the loop can be reduced
// accordingly.
for(iVol= 0; iVol< ( (131072/2)/12 ); iVol++)
{
}
}
}
//--------------------------------------------------------------------------
// Example: InitPeripheralClocks:
//---------------------------------------------------------------------------
// This function initializes the clocks to the peripheral modules.
// First the high and low clock prescalers are set
// Second the clocks are enabled to each peripheral.
// To reduce power, leave clocks to unused peripherals disabled
// Note: If a peripherals clock is not enabled then you cannot
// read or write to the registers for that peripheral
void InitPeripheralClocks(void)
{
EALLOW;
// 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.SCIAENCLK=1;
SysCtrlRegs.PCLKCR.bit.SCIBENCLK=1;
SysCtrlRegs.PCLKCR.bit.MCBSPENCLK=1;
SysCtrlRegs.PCLKCR.bit.SPIENCLK=1;
SysCtrlRegs.PCLKCR.bit.ECANENCLK=1;
SysCtrlRegs.PCLKCR.bit.ADCENCLK=1;
EDIS;
}
void InitSysCtrl(void)
{
// On F2812/F2810 TMX samples prior to rev C this initialization was
// required. For Rev C and after this is no longer required
/*
EALLOW;
DevEmuRegs.M0RAMDFT = 0x0300;
DevEmuRegs.M1RAMDFT = 0x0300;
DevEmuRegs.L0RAMDFT = 0x0300;
DevEmuRegs.L1RAMDFT = 0x0300;
DevEmuRegs.H0RAMDFT = 0x0300;
EDIS;
*/
// Disable the watchdog
DisableDog();
// Initialize the PLLCR to 0xA
InitPll(0xA);
// Initialize the peripheral clocks
InitPeripheralClocks();
}
// InitPieCtrl:
// This function initializes the PIE control registers to a known state.
void InitPieCtrl(void)
{
// Disable Interrupts at the CPU level:
DINT;
// Disable the PIE
PieCtrlRegs.PIECRTL.bit.ENPIE = 0;
// Clear all PIEIER registers:
PieCtrlRegs.PIEIER1.all = 0;
PieCtrlRegs.PIEIER2.all = 0;
PieCtrlRegs.PIEIER3.all = 0;
PieCtrlRegs.PIEIER4.all = 0;
PieCtrlRegs.PIEIER5.all = 0;
PieCtrlRegs.PIEIER6.all = 0;
PieCtrlRegs.PIEIER7.all = 0;
PieCtrlRegs.PIEIER8.all = 0;
PieCtrlRegs.PIEIER9.all = 0;
PieCtrlRegs.PIEIER10.all = 0;
PieCtrlRegs.PIEIER11.all = 0;
PieCtrlRegs.PIEIER12.all = 0;
// Clear all PIEIFR registers:
PieCtrlRegs.PIEIFR1.all = 0;
PieCtrlRegs.PIEIFR2.all = 0;
PieCtrlRegs.PIEIFR3.all = 0;
PieCtrlRegs.PIEIFR4.all = 0;
PieCtrlRegs.PIEIFR5.all = 0;
PieCtrlRegs.PIEIFR6.all = 0;
PieCtrlRegs.PIEIFR7.all = 0;
PieCtrlRegs.PIEIFR8.all = 0;
PieCtrlRegs.PIEIFR9.all = 0;
PieCtrlRegs.PIEIFR10.all = 0;
PieCtrlRegs.PIEIFR11.all = 0;
PieCtrlRegs.PIEIFR12.all = 0;
}
//---------------------------------------------------------------------------
// EnableInterrupts:
//---------------------------------------------------------------------------
// This function enables the PIE module and CPU interrupts
//
void EnableInterrupts()
{
// Enable the PIE
PieCtrlRegs.PIECRTL.bit.ENPIE = 1;
// Enables PIE to drive a pulse into the CPU
PieCtrlRegs.PIEACK.all = 0xFFFF;
// Enable Interrupts at the CPU level
EINT;
}
const struct PIE_VECT_TABLE PieVectTableInit = {
PIE_RESERVED, // Reserved space
PIE_RESERVED,
PIE_RESERVED,
PIE_RESERVED,
PIE_RESERVED,
PIE_RESERVED,
PIE_RESERVED,
PIE_RESERVED,
PIE_RESERVED,
PIE_RESERVED,
PIE_RESERVED,
PIE_RESERVED,
PIE_RESERVED,
// Non-Peripheral Interrupts
INT13_ISR, // XINT13 or CPU-Timer 1
INT14_ISR, // CPU-Timer2
DATALOG_ISR, // Datalogging interrupt
RTOSINT_ISR, // RTOS interrupt
EMUINT_ISR, // Emulation interrupt
NMI_ISR, // Non-maskable interrupt
ILLEGAL_ISR, // Illegal operation TRAP
USER1_ISR, // User Defined trap 1
USER2_ISR, // User Defined trap 2
USER3_ISR, // User Defined trap 3
USER4_ISR, // User Defined trap 4
USER5_ISR, // User Defined trap 5
USER6_ISR, // User Defined trap 6
USER7_ISR, // User Defined trap 7
USER8_ISR, // User Defined trap 8
USER9_ISR, // User Defined trap 9
USER10_ISR, // User Defined trap 10
USER11_ISR, // User Defined trap 11
USER12_ISR, // User Defined trap 12
// Group 1 PIE Vectors
PDPINTA_ISR, // EV-A
PDPINTB_ISR, // EV-B
rsvd_ISR,
XINT1_ISR,
XINT2_ISR,
ADCINT_ISR, // ADC
TINT0_ISR, // Timer 0
WAKEINT_ISR, // WD
// Group 2 PIE Vectors
CMP1INT_ISR, // EV-A
CMP2INT_ISR, // EV-A
CMP3INT_ISR, // EV-A
T1PINT_ISR, // EV-A
T1CINT_ISR, // EV-A
T1UFINT_ISR, // EV-A
T1OFINT_ISR, // EV-A
rsvd_ISR,
// Group 3 PIE Vectors
T2PINT_ISR, // EV-A
T2CINT_ISR, // EV-A
T2UFINT_ISR, // EV-A
T2OFINT_ISR, // EV-A
CAPINT1_ISR, // EV-A
CAPINT2_ISR, // EV-A
CAPINT3_ISR, // EV-A
rsvd_ISR,
// Group 4 PIE Vectors
CMP4INT_ISR, // EV-B
CMP5INT_ISR, // EV-B
CMP6INT_ISR, // EV-B
T3PINT_ISR, // EV-B
T3CINT_ISR, // EV-B
T3UFINT_ISR, // EV-B
T3OFINT_ISR, // EV-B
rsvd_ISR,
// Group 5 PIE Vectors
T4PINT_ISR, // EV-B
T4CINT_ISR, // EV-B
T4UFINT_ISR, // EV-B
T4OFINT_ISR, // EV-B
CAPINT4_ISR, // EV-B
CAPINT5_ISR, // EV-B
CAPINT6_ISR, // EV-B
rsvd_ISR,
// Group 6 PIE Vectors
SPIRXINTA_ISR, // SPI-A
SPITXINTA_ISR, // SPI-A
rsvd_ISR,
rsvd_ISR,
MRINTA_ISR, // McBSP-A
MXINTA_ISR, // McBSP-A
rsvd_ISR,
rsvd_ISR,
// Group 7 PIE Vectors
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
// Group 8 PIE Vectors
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
// Group 9 PIE Vectors
SCIRXINTA_ISR, // SCI-A
SCITXINTA_ISR, // SCI-A
SCIRXINTB_ISR, // SCI-B
SCITXINTB_ISR, // SCI-B
ECAN0INTA_ISR, // eCAN
ECAN1INTA_ISR, // eCAN
rsvd_ISR,
rsvd_ISR,
// Group 10 PIE Vectors
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
// Group 11 PIE Vectors
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
// Group 12 PIE Vectors
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
rsvd_ISR,
};
//---------------------------------------------------------------------------
// InitPieVectTable:
//---------------------------------------------------------------------------
// This function initializes the PIE vector table to a known state.
// This function must be executed after boot time.
//
void InitPieVectTable(void)
{
int16 i;
Uint32 *Source = (void *) &PieVectTableInit;
Uint32 *Dest = (void *) &PieVectTable;
EALLOW;
for(i=0; i < 128; i++)
*Dest++ = *Source++;
EDIS;
// Enable the PIE Vector Table
PieCtrlRegs.PIECRTL.bit.ENPIE = 1;
}
struct CPUTIMER_VARS CpuTimer0;
// CpuTimer 1 and CpuTimer2 are reserved for DSP BIOS & other RTOS
//struct CPUTIMER_VARS CpuTimer1;
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