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/* Adapted for use with IAR Embedded Workbench */
/***********************************************************************************************************************
* DISCLAIMER
* This software is supplied by Renesas Electronics Corporation and is only intended for use with Renesas products. No
* other uses are authorized. This software is owned by Renesas Electronics Corporation and is protected under all
* applicable laws, including copyright laws.
* THIS SOFTWARE IS PROVIDED "AS IS" AND RENESAS MAKES NO WARRANTIES REGARDING
* THIS SOFTWARE, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. ALL SUCH WARRANTIES ARE EXPRESSLY DISCLAIMED. TO THE MAXIMUM
* EXTENT PERMITTED NOT PROHIBITED BY LAW, NEITHER RENESAS ELECTRONICS CORPORATION NOR ANY OF ITS AFFILIATED COMPANIES
* SHALL BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR ANY REASON RELATED TO THIS
* SOFTWARE, EVEN IF RENESAS OR ITS AFFILIATES HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
* Renesas reserves the right, without notice, to make changes to this software and to discontinue the availability of
* this software. By using this software, you agree to the additional terms and conditions found by accessing the
* following link:
* http://www.renesas.com/disclaimer
*
* Copyright (C) 2012 Renesas Electronics Corporation. All rights reserved.
***********************************************************************************************************************/
/***********************************************************************************************************************
* File Name : hwsetup.c
* Version : 1.0
* Device(s) : RX
* H/W Platform : RX65N
* Description : Defines the initialisation routines used each time the MCU is restarted.
***********************************************************************************************************************/
/***********************************************************************************************************************
Includes <System Includes> , "Project Includes"
***********************************************************************************************************************/
#include <stdint.h>
#include <intrinsics.h>
/* Contains delcarations for the functions defined in this file */
#include "hwsetup.h"
/***********************************************************************************************************************
Private global variables and functions
***********************************************************************************************************************/
/* Clock configuration function delcaration */
void operating_frequency_set(void);
/* MCU I/O port configuration function delcaration */
//static void output_ports_configure(void);
/* Interrupt configuration function delcaration */
static void interrupts_configure(void);
/* MCU peripheral module configuration function declaration */
//static void peripheral_modules_enable(void);
/*******************************************************************************
* Function name: hardware_setup
* Description : Contains setup functions called at device restart
* Arguments : none
* Return value : none
*******************************************************************************/
void hardware_setup(void)
{
operating_frequency_set();
interrupts_configure();
}
/*******************************************************************************
* Function name: operating_frequency_set
* Description : Configures the clock settings for each of the device clocks
* Arguments : none
* Return value : none
*******************************************************************************/
void operating_frequency_set(void)
{
/*
Clock Description Frequency
----------------------------------------
Input Clock Frequency............ 24 MHz
Divisor.......................... 2
PLL frequency (x16).............. 192 MHz
Internal Clock Frequency......... 96 MHz
Peripheral Clock Frequency....... 48 MHz
USB Clock Frequency.............. 48 MHz
External Bus Clock Frequency..... 24 MHz */
volatile unsigned int i;
/* Protect off. */
SYSTEM.PRCR.WORD = 0xA50B;
/* Uncomment if not using sub-clock */
//SYSTEM.SOSCCR.BYTE = 0x01; /* stop sub-clock */
SYSTEM.SOSCCR.BYTE = 0x00; /* Enable sub-clock for RTC */
/* Wait 131,072 cycles * 12 MHz = 10.9 ms */
SYSTEM.MOSCWTCR.BYTE = 0x0D;
/* x16 @PLL, 2 divisor */
SYSTEM.PLLCR.WORD = 0x0F01;
/* EXTAL ON */
SYSTEM.MOSCCR.BYTE = 0x00;
/* PLL ON */
SYSTEM.PLLCR2.BYTE = 0x00;
for(i = 0;i< 0x168;i++)
{
/* Wait over 12ms */
__no_operation();
}
/* Setup system clocks
SCKCR - System Clock Control Register
b31:b28 FCK[3:0] 0x02 = Flash clock: PLL/4 = (192 / 4) = 48 MHz
b27:b24 ICK[3:0] 0x01 = System clock: PLL/2 = (192 / 2) = 96 MHz
b23 PSTOP1 0x00 = BCLK pin output is enabled
b19:b16 BCK[3:0] 0x03 = BCLK: PLL/8 = 24 MHz
b11:b8 PCKB[3:0] 0x02 = Peripheral clock B: PLL/4 = 48 MHz
*/
SYSTEM.SCKCR.LONG = 0x21031222; /* ICK=PLL/2,BCK,FCK,PCK=PLL/4 */
/* Setup IEBUS and USB clocks
SCKCR2 - System Clock Control Register 2
b7:b4 UCK[3:0] 0x03 = USB clock is PLL/4 = 48 MHz
b3:b0 IEBCK[3:0] 0x01 = IE Bus clock is PLL/2 = 96 MHz
*/
SYSTEM.SCKCR2.WORD = 0x0031;
/* ICLK, PCLKB, FCLK, BCLK, IECLK, and USBCLK all come from PLL circuit */
SYSTEM.SCKCR3.WORD = 0x0400;
/* Protect on. */
SYSTEM.PRCR.WORD = 0xA500;
}
/***********************************************************************************************************************
* Function name: interrupts_configure
* Description : Configures interrupts used
* Arguments : none
* Return value : none
***********************************************************************************************************************/
void interrupts_configure(void)
{
/* Protect off. */
SYSTEM.PRCR.WORD = 0xA50B;
/* Enable the bus error interrupt to catch accesses to illegal/reserved areas
of memory. */
/* Clear any pending interrupts */
IR(BSC,BUSERR) = 0;
/* Make this the highest priority interrupt (adjust as necessary for your
application) */
IPR(BSC,BUSERR) = 0x0F;
/* Enable the interrupt in the ICU */
IEN(BSC,BUSERR) = 1;
/* Enable illegal address interrupt in the BSC */
BSC.BEREN.BIT.IGAEN = 1;
}
/******************************************************************************
* Function name: buserr_isr
* Description : Sample ISR for bus error (must do hardware setup first!)
* By default, this demo code enables the Bus Error Interrupt.
* This interrupt will fire if the user tries to access code
* or data from one of the reserved areas in the memory map,
* including the areas covered by disabled chip selects.
* A nop statement is included here as a convenient place
* to set a breakpoint during debugging and development, and
* further handling should be added by the user for their
* application.
* Arguments : none
* Return value : none
******************************************************************************/
#pragma vector = VECT_BSC_BUSERR
__interrupt void buserr_isr(void)
{
/* To find the address that was accessed when the bus error occured, read
the register BSC.BERSR2.WORD. The upper 13 bits of this register
contain the upper 13-bits of the offending address (in 512K byte units).
*/
/* Add your own code here to handle this interrupt */
__no_operation();
}
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