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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2009-09-22 Bernard add board.h to this bsp
* 2018-09-02 xuzhuoyi modify for TMS320F28379D version
* 2022-06-21 guyunjie fix bugs in trap_rtosint and enable interrupt nesting
*/
#include <rtthread.h>
#include "board.h"
#include "drv_sci.h"
#include "F28x_Project.h"
#ifndef RT_USING_SMP
extern volatile rt_uint8_t rt_interrupt_nest;
#endif
extern rt_uint32_t rt_thread_switch_interrupt_flag;
extern interrupt void RTOSINT_Handler();
void trap_rtosint()
{
if(rt_thread_switch_interrupt_flag)
{
/* only do pendsv at the end of the last level of interrupt nesting,
* so that threads do not preempt any isrs. */
if(rt_interrupt_nest == 1)
{
/* rt_interrupt_leave_hook is called before rt_interrupt_nest --
* in rt_interrupt_leave. We need to do this manually here to indicate
* that all isrs have been cleared before we switch to thread. */
rt_interrupt_nest --;
asm(" trap #16");
/* increment rt_interrupt_nest to compensate for the previous decrement. */
rt_interrupt_nest ++;
}
}
}
/**
* This is the timer interrupt service routine.
*
*/
interrupt void cpu_timer2_isr(void)
{
CpuTimer2Regs.TCR.all = 0xC000;
ALLOW_ISR_PREEMPT();
/* enter interrupt */
rt_interrupt_enter();
rt_tick_increase();
/* leave interrupt */
rt_interrupt_leave();
}
/**
* This function will initial TMS320F28379D board.
*/
void rt_hw_board_init()
{
/* Configure the system clock @ 84 Mhz */
InitSysCtrl();
DINT;
InitPieCtrl();
IER = 0x0000;
IFR = 0x0000;
InitPieVectTable();
EALLOW; // This is needed to write to EALLOW protected registers
PieVectTable.TIMER2_INT = &cpu_timer2_isr;
PieVectTable.RTOS_INT = &RTOSINT_Handler;
EDIS;
InitCpuTimers();
ConfigCpuTimer(&CpuTimer2, 200, 1000000 / RT_TICK_PER_SECOND);
CpuTimer2Regs.TCR.all = 0x4000;
IER |= M_INT14;
#ifdef RT_USING_HEAP
rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
#endif
rt_hw_sci_init();
#ifdef RT_USING_COMPONENTS_INIT
rt_components_board_init();
#endif
#if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif
/*this hook may cause problem for reasons unknown*/
rt_interrupt_leave_sethook((void (*)(void))trap_rtosint);
}
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