rt-thread/bsp/pic32ethernet/board.c

123 lines
4.0 KiB
C

/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2011-05-23 aozima first implementation for PIC32.
*/
// Adds support for PIC32 Peripheral library functions and macros
#include <plib.h>
#include <rtthread.h>
// Configuration Bits
#pragma config FNOSC = PRIPLL // Oscillator Selection
#pragma config FPLLIDIV = DIV_2 // PLL Input Divider (PIC32 Starter Kit: use divide by 2 only)
#pragma config FPLLMUL = MUL_20 // PLL Multiplier
#pragma config FPLLODIV = DIV_1 // PLL Output Divider
#pragma config FPBDIV = DIV_1 // Peripheral Clock divisor
#pragma config FWDTEN = OFF // Watchdog Timer
#pragma config WDTPS = PS1 // Watchdog Timer Postscale
#pragma config FCKSM = CSDCMD // Clock Switching & Fail Safe Clock Monitor
#pragma config OSCIOFNC = OFF // CLKO Enable
#pragma config POSCMOD = XT // Primary Oscillator
#pragma config IESO = OFF // Internal/External Switch-over
#pragma config FSOSCEN = OFF // Secondary Oscillator Enable
#pragma config CP = OFF // Code Protect
#pragma config BWP = OFF // Boot Flash Write Protect
#pragma config PWP = OFF // Program Flash Write Protect
#pragma config ICESEL = ICS_PGx2 // ICE/ICD Comm Channel Select
#pragma config DEBUG = OFF // Debugger Disabled for Starter Kit
// The following is used by the main application
#define SYS_FREQ (80000000UL)
#define PB_DIV (1 << ((OSCCON&_OSCCON_PBDIV0_MASK)>>_OSCCON_PBDIV0_POSITION) )
#define PRESCALE 256
#define TOGGLES_PER_SEC RT_TICK_PER_SECOND
#define T1_TICK (SYS_FREQ/PB_DIV/PRESCALE/TOGGLES_PER_SEC)
static void rt_hw_show_info(void)
{
rt_kprintf("\r\n\r\n---------- board info ----------\r\n");
rt_kprintf("DEVICE_FAMILY: PIC32\r\n");
rt_kprintf("CPU_ARCHITECTURE: MIPS\r\n");
rt_kprintf("CPU_FREQ: %uMHz\r\n",SYS_FREQ/1000000UL);
}
static void rt_hw_timer_handler(void)
{
/* enter interrupt */
rt_interrupt_enter();
rt_tick_increase();
/* leave interrupt */
rt_interrupt_leave();
}
/**
* This function will initial board.
*/
void rt_hw_board_init()
{
// Configure the device for maximum performance, but do not change the PBDIV clock divisor.
// Given the options, this function will change the program Flash wait states,
// RAM wait state and enable prefetch cache, but will not change the PBDIV.
// The PBDIV value is already set via the pragma FPBDIV option above.
SYSTEMConfig(SYS_FREQ, SYS_CFG_WAIT_STATES | SYS_CFG_PCACHE);
/* use DBPRINTF */
/* rt_hw_console_init(); */
rt_hw_usart_init();
rt_console_set_device("uart1");
rt_hw_show_info();
// enable multi-vector interrupts
INTEnableSystemMultiVectoredInt();
rt_hw_interrupt_disable();
// // STEP 2. configure the core timer
// OpenCoreTimer(CORE_TICK_RATE);
//
// // set up the core timer interrupt with a prioirty of 2 and zero sub-priority
// mConfigIntCoreTimer((CT_INT_ON | CT_INT_PRIOR_2 | CT_INT_SUB_PRIOR_0));
// STEP 2. configure Timer 1 using internal clock, 1:256 prescale
OpenTimer1(T1_ON | T1_SOURCE_INT | T1_PS_1_256, T1_TICK);
// set up the timer interrupt with a priority of 2
ConfigIntTimer1(T1_INT_ON | T1_INT_PRIOR_2);
/* Setup the software interrupt. */
mConfigIntCoreSW0( CSW_INT_ON | CSW_INT_PRIOR_1 | CSW_INT_SUB_PRIOR_0 );
}
void __ISR(_TIMER_1_VECTOR, ipl2) Timer1Handler(void)
{
// clear the interrupt flag
mT1ClearIntFlag();
// .. things to do
rt_hw_timer_handler();
}
//void __ISR(_CORE_TIMER_VECTOR, ipl2) CoreTimerHandler(void)
//{
// // clear the interrupt flag
// mCTClearIntFlag();
//
// // .. things to do
// rt_hw_timer_handler();
//
// // update the period
// UpdateCoreTimer(CORE_TICK_RATE);
//}
void __ISR(_CORE_SOFTWARE_0_VECTOR, ipl1) CoreSW0Handler(void);