rt-thread-official/bsp/rx/drivers/board.c

97 lines
1.9 KiB
C

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