| /******************************************************************************* | |
| * 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) 2014 Renesas Electronics Corporation. All rights reserved. | |
| *******************************************************************************/ | |
| /******************************************************************************* | |
| * System Name : RZ/T1 Init program | |
| * File Name : r_ram_init.c | |
| * Version : 0.1 | |
| * Device : R7S9100xx | |
| * Abstract : API for internal extended RAM function | |
| * Tool-Chain : IAR Embedded Workbench Ver.7.20 | |
| * OS : not use | |
| * H/W Platform : Renesas Starter Kit for RZ/T1(Preliminary) | |
| * Description : internal extended RAM setting API of RZ/T1 | |
| * Limitation : none | |
| *******************************************************************************/ | |
| /******************************************************************************* | |
| * History : DD.MM.YYYY Version Description | |
| * : First Release | |
| *******************************************************************************/ | |
| /******************************************************************************* | |
| Includes <System Includes> , "Project Includes" | |
| *******************************************************************************/ | |
| #include <stdint.h> | |
| #include <Renesas/ior7s910017.h> | |
| #include "r_system.h" | |
| #include "r_ram_init.h" | |
| /******************************************************************************* | |
| Macro definitions | |
| *******************************************************************************/ | |
| #define RAM_ECC_ENABLE (0x00000001) | |
| #define RAM_ECC_DISABLE (0x00000000) | |
| #define RAM_PROTECT (0x00000000) | |
| /******************************************************************************* | |
| Typedef definitions | |
| *******************************************************************************/ | |
| /******************************************************************************* | |
| Imported global variables and functions (from other files) | |
| *******************************************************************************/ | |
| /******************************************************************************* | |
| Exported global variables and functions (to be accessed by other files) | |
| *******************************************************************************/ | |
| /******************************************************************************* | |
| Private variables and functions | |
| *******************************************************************************/ | |
| /******************************************************************************* | |
| * Function Name : R_RAM_ECC_Enable | |
| * Description : Enable ECC function for internal extended RAM. | |
| * Arguments : none | |
| * Return Value : none | |
| *******************************************************************************/ | |
| void R_RAM_ECC_Enable(void) | |
| { | |
| /* Enables writing to the protected registers related to RAM function */ | |
| R_RAM_WriteEnable(); | |
| /* Enable ECC function */ | |
| ECCRAM.RAMEDC.LONG = RAM_ECC_ENABLE; | |
| /* Disables writing to the protected registers related to RAM function */ | |
| R_RAM_WriteDisable(); | |
| } | |
| /******************************************************************************* | |
| End of function R_RAM_ECC_Enable | |
| *******************************************************************************/ | |
| /******************************************************************************* | |
| * Function Name : R_RAM_WriteEnable | |
| * Description : Enable writing to the protected registers related to RAM. | |
| * And dummy read the register in order to fix the register value. | |
| * Arguments : none | |
| * Return Value : none | |
| *******************************************************************************/ | |
| void R_RAM_WriteEnable(void) | |
| { | |
| volatile uint32_t dummy; | |
| /* Special sequence for protect release */ | |
| ECCRAM.RAMPCMD.LONG = 0x000000A5; // Write fixed value 0x000000A5 | |
| ECCRAM.RAMPCMD.LONG = 0x00000001; // Write expected value | |
| ECCRAM.RAMPCMD.LONG = 0x0000FFFE; // Write inversed value of the expected value | |
| ECCRAM.RAMPCMD.LONG = 0x00000001; // Write expected value again | |
| dummy = ECCRAM.RAMPCMD.LONG; | |
| } | |
| /******************************************************************************* | |
| End of function R_RAM_WriteEnable | |
| *******************************************************************************/ | |
| /******************************************************************************* | |
| * Function Name : R_RAM_WriteDisable | |
| * Description : Disable writing to the protected registers related to RAM. | |
| * And dummy read the register in order to fix the register value. | |
| * Arguments : none | |
| * Return Value : none | |
| *******************************************************************************/ | |
| void R_RAM_WriteDisable(void) | |
| { | |
| volatile uint32_t dummy; | |
| /* Clear RAMPCMD register to zero */ | |
| ECCRAM.RAMPCMD.LONG = RAM_PROTECT; | |
| dummy = ECCRAM.RAMPCMD.LONG; | |
| } | |
| /******************************************************************************* | |
| End of function R_RAM_WriteDisable | |
| *******************************************************************************/ | |
| /* End of File */ | |