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139 lines
6.1 KiB
C
139 lines
6.1 KiB
C
14 years ago
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/*******************************************************************************
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* DISCLAIMER
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* This software is supplied by Renesas Electronics Corporation and is only
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* intended for use with Renesas products. No other uses are authorized. This
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* software is owned by Renesas Electronics Corporation and is protected under
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* all 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
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* LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
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* AND NON-INFRINGEMENT. ALL SUCH WARRANTIES ARE EXPRESSLY DISCLAIMED.
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* TO THE MAXIMUM EXTENT PERMITTED NOT PROHIBITED BY LAW, NEITHER RENESAS
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* ELECTRONICS CORPORATION NOR ANY OF ITS AFFILIATED COMPANIES SHALL BE LIABLE
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* FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR
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* ANY REASON RELATED TO THIS SOFTWARE, EVEN IF RENESAS OR ITS AFFILIATES HAVE
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* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
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* Renesas reserves the right, without notice, to make changes to this software
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* and to discontinue the availability of this software. By using this software,
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* 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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/*
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* cgc.c
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*
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* Created on: 01 Oct 2011
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* Author: RJW
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* Reneses Electronics Europe Ltd
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*/
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/******************************************************************************
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System Includes
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******************************************************************************/
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/******************************************************************************
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User Includes
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******************************************************************************/
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#include "iodefine.h"
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#include "cgc.h"
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/*****************************************************************************/
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/* */
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/* Configure the CGC (Clock Generation Circuit) of the RX630 using the */
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/* using the 7 STEPS specified in cgc.h */
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/* */
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/*****************************************************************************/
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/******************************************************************************
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Function : InitCGC
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Description : Initialises the CGC registers based upon the settings
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made in file cgc.h
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Argument : none
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Return value : none
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******************************************************************************/
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void InitCGC(void)
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{
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unsigned long i;
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#if (ENABLE_SUB)
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SYSTEM.SOSCCR.BYTE = 0x00; /* Sub-clock oscillator ON */
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#else
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SYSTEM.SOSCCR.BYTE = 0x01; /* Sub-clock oscillator OFF */
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#endif
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#if (ENABLE_HOCO)
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SYSTEM.HOCOPCR.BYTE = 0x00; /* HOCO PSU ON */
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SYSTEM.HOCOCR.BYTE = 0x00; /* HOCO ON */
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#else
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SYSTEM.HOCOPCR.BYTE = 0x01; /* HOCO PSU OFF */
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SYSTEM.HOCOCR.BYTE = 0x01; /* HOCO OFF */
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#endif
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#if (ENABLE_MAIN)
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SYSTEM.MOSCWTCR.BYTE = 0x0e; /* Main Clock Oscillator Wait Control Register */
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/* 262144 states */
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SYSTEM.MOSCCR.BYTE = 0x00; /* EXTAL ON */
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#else
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SYSTEM.MOSCCR.BYTE = 0x01; /* EXTAL OFF */
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#endif
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#if (ENABLE_PLL)
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SYSTEM.MOSCWTCR.BYTE = 0x0e; /* Main Clock Oscillator Wait Control Register */
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/* 262144 states */
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SYSTEM.MOSCCR.BYTE = 0x00; /* EXTAL ON */
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SYSTEM.PLLWTCR.BYTE = 0x0e; /* PLL Wait Control Register */
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/* 2097152 states */
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SYSTEM.PLLCR2.BYTE = 0x01; /* PLL OFF */
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#if (PLL_INPUT_FREQ_DIV == 1)
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SYSTEM.PLLCR.BIT.PLIDIV = 0;
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#elif (PLL_INPUT_FREQ_DIV == 2)
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SYSTEM.PLLCR.BIT.PLIDIV = 1;
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#elif (PLL_INPUT_FREQ_DIV == 4)
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SYSTEM.PLLCR.BIT.PLIDIV = 2;
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#else
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SYSTEM.PLLCR.BIT.PLIDIV = 0;
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#endif
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SYSTEM.PLLCR.BIT.STC = (PLL_MUL - 1);
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/* External oscillation input selection */
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SYSTEM.PLLCR2.BYTE = 0x00; /* PLL ON */
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#else
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SYSTEM.PLLCR2.BYTE = 0x01; /* PLL OFF */
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#endif
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for(i = 0; i<2500; i++) /* Wait for stabilisation of */
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{ /* HOCO, LOCO, PLL and main clock */
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} /* = 20ms */
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/* (2500 x 1/125kHz = 20ms) */
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SYSTEM.SCKCR.LONG = FCLK_SCKCR |
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ICLK_SCKCR |
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PSTOP1_SCKCR |
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BCLK_SCKCR |
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PCLK1215_SCKCR |
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PCLKB_SCKCR |
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PCLK47_SCKCR |
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PCLK03_SCKCR ;
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SYSTEM.SCKCR2.WORD = UCK_SCKCR2 |
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IEBCK_SCKCR2 ;
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SYSTEM.SCKCR3.WORD = CLK_SOURCE;
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}
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