106 lines
2.1 KiB
C
106 lines
2.1 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include "board.h"
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#include "uart.h"
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#include <stdint.h>
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#include <stdbool.h>
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#include "r_pdl_cgc.h"
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/* General RPDL function definitions */
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#include "r_pdl_definitions.h"
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#include "intrinsics.h"
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#include "iorx62n.h"
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/**
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* This is the timer interrupt service routine.
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*
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*/
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#pragma vector = VECT_CMT0_CMI0
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__interrupt
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void SysTick_Handler(void)
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{
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// __enable_interrupt();
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/* enter interrupt */
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rt_interrupt_enter();
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rt_tick_increase();
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/* leave interrupt */
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rt_interrupt_leave();
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}
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void rt_hw_systick_init(void)
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{
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/* Enable compare match timer 0. */
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MSTP( CMT0 ) = 0;
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/* Interrupt on compare match. */
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CMT0.CMCR.BIT.CMIE = 1;
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/* Set the compare match value. */
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CMT0.CMCOR = ( unsigned short ) (((XTAL_FREQUENCY * PCLK_MUL) / RT_TICK_PER_SECOND)/8 -1);
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/* Divide the PCLK by 128. */
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CMT0.CMCR.BIT.CKS = 0;
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/* Enable the interrupt... */
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_IEN( _CMT0_CMI0 ) = 1;
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/* ...and set its priority to the application defined kernel priority. */
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_IPR( _CMT0_CMI0 ) = 4;
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/* Start the timer. */
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CMT.CMSTR0.BIT.STR0 = 1;
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}
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void rt_hw_system_freq_init(void)
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{
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/* Declare error flag */
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bool err = true;
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/* Modify the MCU clocks, all are based off Epson 12 MHz clock */
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err &= R_CGC_Set
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(
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12E6,
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96E6,
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48E6,
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24E6,
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PDL_NO_DATA
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);
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/*
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Clock Description Frequency
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----------------------------------------
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Input Clock Frequency..............12MHz
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Internal Clock Frequency...........96MHz
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Peripheral Clock Frequency.........48MHz
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External Bus Clock Frequency.......24MHz */
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/* Halt in while loop when RPDL errors detected */
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while (!err);
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}
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/**
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* This function will initial rx62n board
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*/
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void rt_hw_board_init()
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{
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rt_hw_system_freq_init();
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rt_hw_systick_init();
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rt_hw_uart_init();
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#ifdef RT_USING_CONSOLE
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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#endif
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}
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