412 lines
13 KiB
C
412 lines
13 KiB
C
//###########################################################################
|
|
//
|
|
// FILE: interrupt.c
|
|
//
|
|
// TITLE: Stellaris style wrapper driver for C28x PIE Interrupt Controller.
|
|
//
|
|
//###########################################################################
|
|
// $TI Release: F2837xD Support Library v3.05.00.00 $
|
|
// $Release Date: Tue Jun 26 03:15:23 CDT 2018 $
|
|
// $Copyright:
|
|
// Copyright (C) 2013-2018 Texas Instruments Incorporated - http://www.ti.com/
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions
|
|
// are met:
|
|
//
|
|
// Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
//
|
|
// Redistributions in binary form must reproduce the above copyright
|
|
// notice, this list of conditions and the following disclaimer in the
|
|
// documentation and/or other materials provided with the
|
|
// distribution.
|
|
//
|
|
// Neither the name of Texas Instruments Incorporated nor the names of
|
|
// its contributors may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
// $
|
|
//###########################################################################
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! \addtogroup interrupt_api
|
|
//! @{
|
|
//
|
|
//*****************************************************************************
|
|
|
|
#include "F28x_Project.h"
|
|
|
|
#include "inc/hw_types.h"
|
|
#include "driverlib/interrupt.h"
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! \internal
|
|
//! The default interrupt handler.
|
|
//!
|
|
//! This is the default interrupt handler. Whenever an interrupt is
|
|
//! unregisterd this handler takes it place.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
__interrupt void IntDefaultHandler(void)
|
|
{
|
|
asm(" ESTOP0");
|
|
return;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Enables the processor interrupt.
|
|
//!
|
|
//! Allows the processor to respond to interrupts. This does not affect the
|
|
//! set of interrupts enabled in the interrupt controller; it just gates the
|
|
//! single interrupt from the controller to the processor.
|
|
//!
|
|
//! \note Previously, this function had no return value. As such, it was
|
|
//! possible to include <tt>interrupt.h</tt> and call this function without
|
|
//! having included <tt>hw_types.h</tt>. Now that the return is a
|
|
//! <tt>bool</tt>, a compiler error will occur in this case. The solution
|
|
//! is to include <tt>hw_types.h</tt> before including <tt>interrupt.h</tt>.
|
|
//!
|
|
//! \return Returns \b true if interrupts were disabled when the function was
|
|
//! called or \b false if they were initially enabled.
|
|
//
|
|
//*****************************************************************************
|
|
bool
|
|
IntMasterEnable(void)
|
|
{
|
|
//
|
|
// Enable processor interrupts.
|
|
//
|
|
return __enable_interrupts() & 0x1;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Disables the processor interrupt.
|
|
//!
|
|
//! Prevents the processor from receiving interrupts. This does not affect the
|
|
//! set of interrupts enabled in the interrupt controller; it just gates the
|
|
//! single interrupt from the controller to the processor.
|
|
//!
|
|
//! \note Previously, this function had no return value. As such, it was
|
|
//! possible to include <tt>interrupt.h</tt> and call this function without
|
|
//! having included <tt>hw_types.h</tt>. Now that the return is a
|
|
//! <tt>bool</tt>, a compiler error will occur in this case. The solution
|
|
//! is to include <tt>hw_types.h</tt> before including <tt>interrupt.h</tt>.
|
|
//!
|
|
//! \return Returns \b true if interrupts were already disabled when the
|
|
//! function was called or \b false if they were initially enabled.
|
|
//
|
|
//*****************************************************************************
|
|
bool
|
|
IntMasterDisable(void)
|
|
{
|
|
//
|
|
// Disable processor interrupts.
|
|
//
|
|
return __disable_interrupts() & 0x1;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Registers a function to be called when an interrupt occurs.
|
|
//
|
|
//! Assumes PIE is enabled
|
|
//!
|
|
//! \param ui32Interrupt specifies the interrupt in question.
|
|
//! \param pfnHandler is a pointer to the function to be called.
|
|
//!
|
|
//! This function is used to specify the handler function to be called when the
|
|
//! given interrupt is asserted to the processor. When the interrupt occurs,
|
|
//! if it is enabled (via IntEnable()), the handler function will be called in
|
|
//! interrupt context. Since the handler function can pre-empt other code, care
|
|
//! must be taken to protect memory or peripherals that are accessed by the
|
|
//! handler and other non-handler code.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
IntRegister(uint32_t ui32Interrupt, void (*pfnHandler)(void))
|
|
{
|
|
EALLOW;
|
|
//Copy ISR address into PIE table
|
|
memcpy((uint16_t *) &PieVectTable + ((ui32Interrupt & 0xFFFF0000) >> 16)*2, (uint16_t *) &pfnHandler, sizeof(pfnHandler));
|
|
EDIS;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Unregisters the function to be called when an interrupt occurs.
|
|
//!
|
|
//! \param ui32Interrupt specifies the interrupt in question.
|
|
//!
|
|
//! This function is used to indicate that no handler should be called when the
|
|
//! given interrupt is asserted to the processor. The interrupt source will be
|
|
//! automatically disabled (via IntDisable()) if necessary.
|
|
//!
|
|
//! \sa IntRegister() for important information about registering interrupt
|
|
//! handlers.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
IntUnregister(uint32_t ui32Interrupt)
|
|
{
|
|
uint32_t temp;
|
|
|
|
temp = (uint32_t) IntDefaultHandler;
|
|
|
|
EALLOW;
|
|
//Copy default ISR address into PIE table
|
|
memcpy((uint16_t *) &PieVectTable + ((ui32Interrupt & 0xFFFF0000) >> 16)*2, (uint16_t *) &temp, sizeof(temp));
|
|
EDIS;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Enables an interrupt.
|
|
//!
|
|
//! \param ui32Interrupt specifies the interrupt to be enabled.
|
|
//!
|
|
//! The specified interrupt is enabled in the interrupt controller. Other
|
|
//! enables for the interrupt (such as at the peripheral level) are unaffected
|
|
//! by this function.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
IntEnable(uint32_t ui32Interrupt)
|
|
{
|
|
uint16_t ui16IntsEnabled;
|
|
|
|
ui32Interrupt = ui32Interrupt >> 16;
|
|
EALLOW;
|
|
//Ensure that PIE is enabled
|
|
PieCtrlRegs.PIECTRL.bit.ENPIE=1;
|
|
|
|
ui16IntsEnabled = IntMasterDisable();
|
|
|
|
if (ui32Interrupt >= 0x20 && ui32Interrupt <= 0x7F) //Lower PIE table
|
|
{
|
|
//Enable Individual PIE interrupt
|
|
*(uint16_t *)((&PieCtrlRegs.PIEIER1.all) + (((ui32Interrupt-0x20)/8))*2) |= 1 << ((ui32Interrupt-0x20)%8);
|
|
|
|
// Wait for any pending interrupts to get to the CPU
|
|
asm(" nop");
|
|
asm(" nop");
|
|
asm(" nop");
|
|
asm(" nop");
|
|
asm(" nop");
|
|
|
|
//Clear the CPU flag
|
|
IntIFRClear(1 << ((ui32Interrupt - 0x20)/8));
|
|
|
|
//Acknowlege any interrupts
|
|
PieCtrlRegs.PIEACK.all = 1 << ((ui32Interrupt - 0x20)/8);
|
|
|
|
//Enable PIE Group Interrupt
|
|
IER |= 1 << ((ui32Interrupt - 0x20)/8);
|
|
}
|
|
else if (ui32Interrupt >= 0x80) //Upper PIE table
|
|
{
|
|
//Enable Individual PIE interrupt
|
|
*(uint16_t *)((&PieCtrlRegs.PIEIER1.all) + (((ui32Interrupt-0x80)/8))*2) |= 1 << (((ui32Interrupt-0x80)%8)+8);
|
|
|
|
// Wait for any pending interrupts to get to the CPU
|
|
asm(" nop");
|
|
asm(" nop");
|
|
asm(" nop");
|
|
asm(" nop");
|
|
asm(" nop");
|
|
|
|
//Clear the CPU flag
|
|
IntIFRClear(1 << ((ui32Interrupt - 0x80)/8));
|
|
|
|
//Acknowlege any interrupts
|
|
PieCtrlRegs.PIEACK.all = 1 << ((ui32Interrupt - 0x80)/8);
|
|
|
|
//Enable PIE Group Interrupt
|
|
IER |= 1 << ((ui32Interrupt - 0x80)/8);
|
|
}
|
|
else if (ui32Interrupt >= 0x0D && ui32Interrupt <= 0x10) //INT13, INT14, DLOGINT, & RTOSINT
|
|
{
|
|
//Enable PIE Group Interrupt
|
|
IER |= 1 << (ui32Interrupt - 1);
|
|
}
|
|
else
|
|
{
|
|
//Other interrupts
|
|
}
|
|
|
|
EDIS;
|
|
|
|
//Re-enable interrupts if they were enabled
|
|
if(!ui16IntsEnabled){
|
|
IntMasterEnable();
|
|
}
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Disables an interrupt.
|
|
//!
|
|
//! \param ui32Interrupt specifies the interrupt to be disabled.
|
|
//!
|
|
//! The specified interrupt is disabled in the interrupt controller. Other
|
|
//! enables for the interrupt (such as at the peripheral level) are unaffected
|
|
//! by this function.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
IntDisable(uint32_t ui32Interrupt)
|
|
{
|
|
uint16_t ui16IntsEnabled;
|
|
|
|
ui32Interrupt = ui32Interrupt >> 16;
|
|
EALLOW;
|
|
|
|
ui16IntsEnabled = IntMasterDisable();
|
|
|
|
if (ui32Interrupt >= 0x20 && ui32Interrupt <= 0x7F) //Lower PIE table
|
|
{
|
|
//Disable Individual PIE interrupt
|
|
*(uint16_t *)((&PieCtrlRegs.PIEIER1.all) + (((ui32Interrupt-0x20)/8))*2) &= ~(1 << ((ui32Interrupt-0x20)%8));
|
|
|
|
// Wait for any pending interrupts to get to the CPU
|
|
asm(" nop");
|
|
asm(" nop");
|
|
asm(" nop");
|
|
asm(" nop");
|
|
asm(" nop");
|
|
|
|
//Clear the CPU flag
|
|
IntIFRClear(1 << ((ui32Interrupt - 0x20)/8));
|
|
|
|
//Acknowlege any interrupts
|
|
PieCtrlRegs.PIEACK.all = 1 << ((ui32Interrupt - 0x20)/8);
|
|
}
|
|
else if (ui32Interrupt >= 0x80) //Upper PIE table
|
|
{
|
|
//Disable Individual PIE interrupt
|
|
*(uint16_t *)((&PieCtrlRegs.PIEIER1.all) + (((ui32Interrupt-0x80)/8))*2) &= ~(1 << (((ui32Interrupt-0x80)%8)+8));
|
|
|
|
// Wait for any pending interrupts to get to the CPU
|
|
asm(" nop");
|
|
asm(" nop");
|
|
asm(" nop");
|
|
asm(" nop");
|
|
asm(" nop");
|
|
|
|
//Clear the CPU flag
|
|
IntIFRClear(1 << ((ui32Interrupt - 0x80)/8));
|
|
|
|
//Acknowlege any interrupts
|
|
PieCtrlRegs.PIEACK.all = 1 << ((ui32Interrupt - 0x80)/8);
|
|
}
|
|
else if (ui32Interrupt >= 0x0D && ui32Interrupt <= 0x10) //INT13, INT14, DLOGINT, & RTOSINT //Work-around Case
|
|
{
|
|
//Disable PIE Group Interrupt
|
|
IER &= ~(1 << (ui32Interrupt - 1));
|
|
}
|
|
else
|
|
{
|
|
//Other Interrupts
|
|
}
|
|
EDIS;
|
|
|
|
//Re-enable interrupts if they were enabled
|
|
if(!ui16IntsEnabled){
|
|
IntMasterEnable();
|
|
}
|
|
}
|
|
|
|
void IntIFRClear(uint16_t ui16Interrupts)
|
|
{
|
|
switch(ui16Interrupts){
|
|
case 0x0001:
|
|
IFR &= ~0x0001;
|
|
break;
|
|
case 0x0002:
|
|
IFR &= ~0x0002;
|
|
break;
|
|
case 0x0004:
|
|
IFR &= ~0x0004;
|
|
break;
|
|
case 0x0008:
|
|
IFR &= ~0x0008;
|
|
break;
|
|
case 0x0010:
|
|
IFR &= ~0x0010;
|
|
break;
|
|
case 0x0020:
|
|
IFR &= ~0x0020;
|
|
break;
|
|
case 0x0040:
|
|
IFR &= ~0x0040;
|
|
break;
|
|
case 0x0080:
|
|
IFR &= ~0x0080;
|
|
break;
|
|
case 0x0100:
|
|
IFR &= ~0x0100;
|
|
break;
|
|
case 0x0200:
|
|
IFR &= ~0x0200;
|
|
break;
|
|
case 0x0400:
|
|
IFR &= ~0x0400;
|
|
break;
|
|
case 0x0800:
|
|
IFR &= ~0x0800;
|
|
break;
|
|
case 0x1000:
|
|
IFR &= ~0x1000;
|
|
break;
|
|
case 0x2000:
|
|
IFR &= ~0x2000;
|
|
break;
|
|
case 0x4000:
|
|
IFR &= ~0x4000;
|
|
break;
|
|
case 0x8000:
|
|
IFR &= ~0x8000;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
// Close the Doxygen group.
|
|
//! @}
|
|
//
|
|
//*****************************************************************************
|
|
|
|
|