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Release 6.1.9
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Yuxin Zhou
189
ports_module/rxv2/iar/example_build/hwsetup.c
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189
ports_module/rxv2/iar/example_build/hwsetup.c
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/* Adapted for use with IAR Embedded Workbench */
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/***********************************************************************************************************************
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* DISCLAIMER
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* This software is supplied by Renesas Electronics Corporation and is only intended for use with Renesas products. No
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* other uses are authorized. This software is owned by Renesas Electronics Corporation and is protected under all
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* applicable laws, including copyright laws.
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* THIS SOFTWARE IS PROVIDED "AS IS" AND RENESAS MAKES NO WARRANTIES REGARDING
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* THIS SOFTWARE, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. ALL SUCH WARRANTIES ARE EXPRESSLY DISCLAIMED. TO THE MAXIMUM
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* EXTENT PERMITTED NOT PROHIBITED BY LAW, NEITHER RENESAS ELECTRONICS CORPORATION NOR ANY OF ITS AFFILIATED COMPANIES
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* SHALL BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR ANY REASON RELATED TO THIS
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* SOFTWARE, EVEN IF RENESAS OR ITS AFFILIATES HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
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* Renesas reserves the right, without notice, to make changes to this software and to discontinue the availability of
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* this software. By using this software, you agree to the additional terms and conditions found by accessing the
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* following link:
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* http://www.renesas.com/disclaimer
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*
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* Copyright (C) 2012 Renesas Electronics Corporation. All rights reserved.
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***********************************************************************************************************************/
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/***********************************************************************************************************************
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* File Name : hwsetup.c
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* Version : 1.0
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* Device(s) : RX
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* H/W Platform : RX65N
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* Description : Defines the initialisation routines used each time the MCU is restarted.
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***********************************************************************************************************************/
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/***********************************************************************************************************************
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Includes <System Includes> , "Project Includes"
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***********************************************************************************************************************/
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#include <stdint.h>
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#include <intrinsics.h>
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/* Contains delcarations for the functions defined in this file */
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#include "hwsetup.h"
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/***********************************************************************************************************************
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Private global variables and functions
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***********************************************************************************************************************/
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/* Clock configuration function delcaration */
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void operating_frequency_set(void);
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/* MCU I/O port configuration function delcaration */
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//static void output_ports_configure(void);
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/* Interrupt configuration function delcaration */
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static void interrupts_configure(void);
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/* MCU peripheral module configuration function declaration */
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//static void peripheral_modules_enable(void);
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/*******************************************************************************
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* Function name: hardware_setup
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* Description : Contains setup functions called at device restart
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* Arguments : none
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* Return value : none
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*******************************************************************************/
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void hardware_setup(void)
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{
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operating_frequency_set();
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interrupts_configure();
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}
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/*******************************************************************************
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* Function name: operating_frequency_set
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* Description : Configures the clock settings for each of the device clocks
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* Arguments : none
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* Return value : none
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*******************************************************************************/
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void operating_frequency_set(void)
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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............ 24 MHz
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Divisor.......................... 2
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PLL frequency (x16).............. 192 MHz
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Internal Clock Frequency......... 96 MHz
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Peripheral Clock Frequency....... 48 MHz
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USB Clock Frequency.............. 48 MHz
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External Bus Clock Frequency..... 24 MHz */
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volatile unsigned int i;
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/* Protect off. */
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SYSTEM.PRCR.WORD = 0xA50B;
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/* Uncomment if not using sub-clock */
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//SYSTEM.SOSCCR.BYTE = 0x01; /* stop sub-clock */
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SYSTEM.SOSCCR.BYTE = 0x00; /* Enable sub-clock for RTC */
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/* Wait 131,072 cycles * 12 MHz = 10.9 ms */
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SYSTEM.MOSCWTCR.BYTE = 0x0D;
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/* x16 @PLL, 2 divisor */
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SYSTEM.PLLCR.WORD = 0x0F01;
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/* EXTAL ON */
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SYSTEM.MOSCCR.BYTE = 0x00;
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/* PLL ON */
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SYSTEM.PLLCR2.BYTE = 0x00;
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for(i = 0;i< 0x168;i++)
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{
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/* Wait over 12ms */
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__no_operation();
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}
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/* Setup system clocks
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SCKCR - System Clock Control Register
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b31:b28 FCK[3:0] 0x02 = Flash clock: PLL/4 = (192 / 4) = 48 MHz
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b27:b24 ICK[3:0] 0x01 = System clock: PLL/2 = (192 / 2) = 96 MHz
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b23 PSTOP1 0x00 = BCLK pin output is enabled
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b19:b16 BCK[3:0] 0x03 = BCLK: PLL/8 = 24 MHz
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b11:b8 PCKB[3:0] 0x02 = Peripheral clock B: PLL/4 = 48 MHz
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*/
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SYSTEM.SCKCR.LONG = 0x21031222; /* ICK=PLL/2,BCK,FCK,PCK=PLL/4 */
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/* Setup IEBUS and USB clocks
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SCKCR2 - System Clock Control Register 2
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b7:b4 UCK[3:0] 0x03 = USB clock is PLL/4 = 48 MHz
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b3:b0 IEBCK[3:0] 0x01 = IE Bus clock is PLL/2 = 96 MHz
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*/
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SYSTEM.SCKCR2.WORD = 0x0031;
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/* ICLK, PCLKB, FCLK, BCLK, IECLK, and USBCLK all come from PLL circuit */
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SYSTEM.SCKCR3.WORD = 0x0400;
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/* Protect on. */
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SYSTEM.PRCR.WORD = 0xA500;
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}
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/***********************************************************************************************************************
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* Function name: interrupts_configure
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* Description : Configures interrupts used
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* Arguments : none
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* Return value : none
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***********************************************************************************************************************/
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void interrupts_configure(void)
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{
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/* Protect off. */
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SYSTEM.PRCR.WORD = 0xA50B;
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/* Enable the bus error interrupt to catch accesses to illegal/reserved areas
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of memory. */
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/* Clear any pending interrupts */
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IR(BSC,BUSERR) = 0;
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/* Make this the highest priority interrupt (adjust as necessary for your
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application) */
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IPR(BSC,BUSERR) = 0x0F;
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/* Enable the interrupt in the ICU */
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IEN(BSC,BUSERR) = 1;
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/* Enable illegal address interrupt in the BSC */
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BSC.BEREN.BIT.IGAEN = 1;
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}
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/******************************************************************************
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* Function name: buserr_isr
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* Description : Sample ISR for bus error (must do hardware setup first!)
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* By default, this demo code enables the Bus Error Interrupt.
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* This interrupt will fire if the user tries to access code
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* or data from one of the reserved areas in the memory map,
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* including the areas covered by disabled chip selects.
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* A nop statement is included here as a convenient place
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* to set a breakpoint during debugging and development, and
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* further handling should be added by the user for their
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* application.
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* Arguments : none
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* Return value : none
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******************************************************************************/
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#pragma vector = VECT_BSC_BUSERR
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__interrupt void buserr_isr(void)
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{
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/* To find the address that was accessed when the bus error occured, read
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the register BSC.BERSR2.WORD. The upper 13 bits of this register
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contain the upper 13-bits of the offending address (in 512K byte units).
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*/
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/* Add your own code here to handle this interrupt */
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__no_operation();
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}
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