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/*******************************************************************************
* 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_ecm.c
* Version : 0.1
* Device : R7S9100xx
* Abstract : API for ECM function
* Tool-Chain : IAR Embedded Workbench Ver.7.20
* OS : not use
* H/W Platform : Renesas Starter Kit for RZ/T1(Preliminary)
* Description : ECM API of RZ/T1
* Limitation : LOCO operation is necessary for clearing ERROROUT# pin.
*******************************************************************************/
/*******************************************************************************
* 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_ecm.h"
#include "r_reset.h"
#include "r_icu_init.h"
/*******************************************************************************
Macro definitions
*******************************************************************************/
#define ECM_CMT0_CLOCK_PCLKD_32 (1)
#define ECM_CMT0_CMI0_ENABLE (1)
#define ECM_CMT0_CONST_15_us (0x22)
#define ECM_CMT0_START (1)
#define ECM_CMT0_STOP (0)
#define ECM_CMT_REG_CLEAR (0x0000)
/*******************************************************************************
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
*******************************************************************************/
static uint32_t *g_pcmd_reg_adrr[ECM_TYPE_MAX] =
{
(uint32_t *) &ECMM.ECMMPCMD0.LONG,
(uint32_t *) &ECMC.ECMCPCMD0.LONG,
(uint32_t *) &ECM.ECMPCMD1.LONG
};
/*******************************************************************************
* Function Name : R_ECM_Init
* Description : Initialize ECM function.
* - Clear all error source
* - Clear ERROROUT# pin output to in-active (High) level.
* Arguments : none
* Return Value : none
*******************************************************************************/
void R_ECM_Init(void)
{
volatile uint8_t result;
/* Clear all error source (ECMESSTC0, ECMESSTC1, ECMESSTC2) */
result = R_ECM_Write_Reg32(ECM_COMMON, &(ECM.ECMESSTC0.LONG), 0xDFFFFFF7);
result = R_ECM_Write_Reg32(ECM_COMMON, &(ECM.ECMESSTC1.LONG), 0x000001FF);
result = R_ECM_Write_Reg32(ECM_COMMON, &(ECM.ECMESSTC2.LONG), 0x70000000);
/* Mask all error source (ECMEMK0, ECMEMK1, ECMEMK2) for clearing ERROROUT# */
result = R_ECM_Write_Reg32(ECM_COMMON, &(ECM.ECMEMK0.LONG), 0xDFFFFFF7);
result = R_ECM_Write_Reg32(ECM_COMMON, &(ECM.ECMEMK1.LONG), 0x000001FF);
result = R_ECM_Write_Reg32(ECM_COMMON, &(ECM.ECMEMK2.LONG), 0x30000000);
/* Mask ECM maskable, non-maskable interrupt and ECM reset of ECM compare match
error (ECMMICFG2, ECMNMICFG2, ECMIRCFG2) */
result = R_ECM_Write_Reg32(ECM_COMMON, &(ECM.ECMMICFG2.LONG), 0x00000000);
result = R_ECM_Write_Reg32(ECM_COMMON, &(ECM.ECMNMICFG2.LONG), 0x00000000);
result = R_ECM_Write_Reg32(ECM_COMMON, &(ECM.ECMIRCFG2.LONG), 0x00000000);
/* Clear ERROROUT# pin output to in-active (High) level */
result = R_ECM_Write_Reg8(ECM_MASTER, &(ECMM.ECMMECLR.BYTE), 0x01);
result = R_ECM_Write_Reg8(ECM_CHECKER, &(ECMC.ECMCECLR.BYTE), 0x01);
/* Wait 15us for ECM compare error stabilization */
R_ECM_CompareError_Wait();
/* Clear ECM compare error (ECMESSTC2) again */
result = R_ECM_Write_Reg32(ECM_COMMON, &(ECM.ECMESSTC2.LONG), 0x10000000);
/* Initialize the all error mask settings (ECMEMK0, ECMEMK1, ECMEMK2) */
result = R_ECM_Write_Reg32(ECM_COMMON, &(ECM.ECMEMK0.LONG), 0x00000000);
result = R_ECM_Write_Reg32(ECM_COMMON, &(ECM.ECMEMK1.LONG), 0x00000000);
result = R_ECM_Write_Reg32(ECM_COMMON, &(ECM.ECMEMK2.LONG), 0x00000000);
}
/*******************************************************************************
End of function R_ECM_Init
*******************************************************************************/
/*******************************************************************************
* Function Name : R_ECM_CompareError_Wait
* Description : Wait about 15 us for ECM compare error stabilizeation by using CMT0
* Arguments : none
* Return Value : none
*******************************************************************************/
void R_ECM_CompareError_Wait(void)
{
/* Enables writing to the registers related to Reset and Low-Power function */
r_rst_write_enable();
/* Release from the CMT0 module-stop state */
MSTP(CMT0) = 0;
/* Disables writing to the registers related to Reset and Low-Power function */
r_rst_write_disable();
/* Set CMT0 to 100us interval operation */
CMT0.CMCR.BIT.CKS = ECM_CMT0_CLOCK_PCLKD_32; // Count clock = PCLKD/32
CMT0.CMCR.BIT.CMIE = ECM_CMT0_CMI0_ENABLE; // Enable CMI0 interrupt
CMT0.CMCNT = ECM_CMT_REG_CLEAR; // Clear CMCNT counter
CMT0.CMCOR = ECM_CMT0_CONST_15_us; // Set constant value for 15us
/* Set IRQ21(CMI0) for polloing sequence */
VIC.IEC0.BIT.IEC21 = ICU_IEC_MASK_SET; // Mask IRQ21 interrupt
VIC.PLS0.BIT.PLS21 = ICU_TYPE_EDGE; // Set EDGE type interrupt
VIC.PIC0.BIT.PIC21 = ICU_PIC_EDGE_CLEAR; // Clear interrupt detection edge
/* Enable IRQ interrupt (Clear CPSR.I bit to 0) */
asm("cpsie i"); // Clear CPSR.I bit to 0
asm("isb"); // Ensuring Context-changing
/* Start CMT0 count */
CMT.CMSTR0.BIT.STR0 = ECM_CMT0_START;
/* Wait for 15us (IRQ21 is generated) */
while ( ! (VIC.RAIS0.BIT.RAI21) )
{
/* Wait */
}
/* Stop CMT0 count */
CMT.CMSTR0.BIT.STR0 = ECM_CMT0_STOP;
/* Initialize CMT0 settings and clear interrupt detection edge */
CMT0.CMCR.WORD = ECM_CMT_REG_CLEAR;
CMT0.CMCNT = ECM_CMT_REG_CLEAR;
CMT0.CMCOR = ECM_CMT_REG_CLEAR;
CMT.CMSTR0.WORD = ECM_CMT_REG_CLEAR;
VIC.PIC0.BIT.PIC21 = ICU_PIC_EDGE_CLEAR; // Clear interrupt detection edge
/* Disable IRQ interrupt (Set CPSR.I bit to 1) */
asm("cpsid i");
asm("isb");
/* Enables writing to the registers related to Reset and Low-Power function */
r_rst_write_enable();
/* Set CMT0 to module-stop state */
MSTP(CMT0) = 1;
/* Disables writing to the registers related to Reset and Low-Power function */
r_rst_write_disable();
}
/*******************************************************************************
End of function R_ECM_CompareError_Wait
*******************************************************************************/
/*******************************************************************************
* Function Name : R_ECM_Write_Reg8
* Description : Writing the special sequence for 8-bit ECM protected register
* Arguments : reg_type
* The type of ECM register (ECM_MASETR, ECM_CHECKER, ECM_COMMON)
* *reg
* The address of ECM protected register
* value
* The 8-bit value of writing to protected register
* Return Value : none
*******************************************************************************/
uint8_t R_ECM_Write_Reg8( uint8_t reg_type, volatile unsigned char *reg, uint8_t value)
{
uint8_t result;
volatile uint8_t dummy_8;
volatile uint32_t dummy_32;
/* Special write sequence */
*g_pcmd_reg_adrr[reg_type] = ECM_COMMAND_KEY; // Write fixed value
dummy_32 = *g_pcmd_reg_adrr[reg_type];
*reg = value; // Write expected value
*reg = ~value; // Write inversed value of the expected value
*reg = value; // Write expected value
dummy_8 = *reg;
/* Check the ECMPS register whether special sequence is success or failure
result = 0 : Special sequence is success.
= 1 : Special sequence is failure. */
result = ECM.ECMPS.BYTE;
return result;
}
/*******************************************************************************
End of function R_ECM_Write_Reg8
*******************************************************************************/
/*******************************************************************************
* Function Name : R_ECM_Write_Reg32
* Description : Writing the special sequence for 32-bit ECM protected register
* Arguments : reg_type
* The type of ECM register (ECM_MASETR, ECM_CHECKER, ECM_COMMON)
* *reg
* The address of ECM protected register
* value
* The 32-bit value of writing to protected register
* Return Value : none
*******************************************************************************/
uint8_t R_ECM_Write_Reg32( uint8_t reg_type, volatile unsigned long *reg, uint32_t value)
{
uint8_t result;
volatile uint32_t dummy_32;
/* Special write sequence */
*g_pcmd_reg_adrr[reg_type] = ECM_COMMAND_KEY; // Write fixed value
dummy_32 = *g_pcmd_reg_adrr[reg_type];
*reg = value; // Write expected value
*reg = ~value; // Write inversed value of the expected value
*reg = value; // Write expected value
dummy_32 = *reg;
/* Check the ECMPS register whether special sequence is success or failure
result = 0 : Special sequence is success.
= 1 : Special sequence is failure. */
result = ECM.ECMPS.BYTE;
return result;
}
/*******************************************************************************
End of function R_ECM_Write_Reg32
*******************************************************************************/
/* End of File */
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