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Commit 3 RX100 low power demos.
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Richard Barry
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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) 2011 Renesas Electronics Corporation. All rights reserved.
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***********************************************************************************************************************/
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/***********************************************************************************************************************
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* File Name : r_switches.c
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* Description : Functions for using switches with callback functions.
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************************************************************************************************************************
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* History : DD.MM.YYYY Version Description
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* : 17.01.2012 1.00 First Release
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* : 17.02.2012 1.10 Added RSKRX210 support.
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* : 08.03.2012 1.20 Added GetVersion() function (though it's really a macro).
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* : 04.06.2012 1.30 Code can now be interrupt or poll driven.
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* : 07.11.2012 1.40 Added support for RSKRX111
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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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/* Board and MCU support. */
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#include "platform.h"
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/* Switches prototypes. */
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#include "r_switches_if.h"
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/* Scheduler includes. */
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#include "FreeRTOS.h"
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typedef int bool;
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/***********************************************************************************************************************
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Macro definitions
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***********************************************************************************************************************/
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/* This helps reduce the amount of unique code for each supported board. */
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#define X_IRQ( x ) XX_IRQ( x )
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#define XX_IRQ( x ) _ICU_IRQ##x
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/* These macros define which IRQ pins are used for the switches. Note that these defintions cannot have parentheses
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around them. */
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#if defined(PLATFORM_BOARD_RSKRX111)
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#define SW1_IRQ_NUMBER 0
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#define SW2_IRQ_NUMBER 1
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#define SW3_IRQ_NUMBER 4
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#else
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#error This file is only for use on the RX100 RSK
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#endif
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/* Number of switches on this board. */
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#define SWITCHES_NUM (3)
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/* Register definitions not yet correct in iorx111.h. */
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#define MPC_P30PFS_REG ( * ( unsigned char * ) 0x0008C158 )
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#define MPC_P31PFS_REG ( * ( unsigned char * ) 0x0008C159 )
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#define MPC_PE4PFS_REG ( * ( unsigned char * ) 0x0008C1B4 )
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/***********************************************************************************************************************
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Typedef definitions
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***********************************************************************************************************************/
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typedef struct
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{
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bool active;
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int32_t debounce_cnt;
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} switch_t;
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/***********************************************************************************************************************
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Private global variables and functions
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***********************************************************************************************************************/
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#if SWITCHES_DETECTION_MODE == 1
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/* Update Hz */
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static uint32_t g_sw_debounce_cnts;
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/* Used for debounce. */
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switch_t g_switches[SWITCHES_NUM];
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#endif
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/***********************************************************************************************************************
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* Function Name: R_SWITCHES_Init
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* Description : Initializes pins to be input and interrupt on switch presses.
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* Arguments :
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* Return Value : none
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***********************************************************************************************************************/
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void R_SWITCHES_Init (void)
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{
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/* Unlock protection register */
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MPC.PWPR.BYTE &= 0x7F;
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/* Unlock MPC registers */
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MPC.PWPR.BYTE |= 0x40;
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/* Make switch pins inputs. */
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PORT3.PDR.BYTE &= 0xFC;
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PORTE.PDR.BYTE &= 0xEF;
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/* Set port mode registers for switches. */
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PORT3.PMR.BYTE &= 0xFC;
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PORTE.PMR.BYTE &= 0xEF;
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MPC_P30PFS_REG = 0x40; /* P30 is used as IRQ pin */
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MPC_P31PFS_REG = 0x40; /* P31 is used as IRQ pin */
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MPC_PE4PFS_REG = 0x40; /* PE4 is used as IRQ pin */
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/* Set IRQ type (falling edge) */
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ICU.IRQCR[ SW1_IRQ_NUMBER ].BYTE = 0x04;
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ICU.IRQCR[ SW2_IRQ_NUMBER ].BYTE = 0x04;
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ICU.IRQCR[ SW3_IRQ_NUMBER ].BYTE = 0x04;
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/* Set interrupt priorities, which must be below
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configMAX_SYSCALL_INTERRUPT_PRIORITY. */
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_IPR( X_IRQ(SW1_IRQ_NUMBER) ) = configKERNEL_INTERRUPT_PRIORITY;
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_IPR( X_IRQ(SW2_IRQ_NUMBER) ) = configKERNEL_INTERRUPT_PRIORITY;
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_IPR( X_IRQ(SW3_IRQ_NUMBER) ) = configKERNEL_INTERRUPT_PRIORITY;
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/* Clear any pending interrupts */
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_IR( X_IRQ(SW1_IRQ_NUMBER) ) = 0;
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_IR( X_IRQ(SW2_IRQ_NUMBER) ) = 0;
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_IR( X_IRQ(SW3_IRQ_NUMBER) ) = 0;
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/* Enable the interrupts */
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_IEN( X_IRQ(SW1_IRQ_NUMBER) ) = 1;
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_IEN( X_IRQ(SW2_IRQ_NUMBER) ) = 1;
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_IEN( X_IRQ(SW3_IRQ_NUMBER) ) = 1;
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}
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/* If using polling then the user must call the update function. */
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/***********************************************************************************************************************
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* Function name: R_SWITCHES_Update
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* Description : Polls switches and calls callback functions as needed. If you are using IRQ mode then this function
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* is not needed and can be removed if desired. It is left in so that code will not fail when switching
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* between polling or IRQ mode.
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* Arguments : none
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* Return value : none
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***********************************************************************************************************************/
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void R_SWITCHES_Update (void)
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{
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#if SWITCHES_DETECTION_MODE == 1
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/* This code is only needed for polling mode. */
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/* Check switch 1. */
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if (SW1 == SW_ACTIVE)
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{
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if (g_switches[0].active != true)
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{
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if (++g_switches[0].debounce_cnt >= g_sw_debounce_cnts)
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{
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/* Set this to true so we only call the callback function once per press. */
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g_switches[0].active = true;
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/* Call callback function. */
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SW1_CALLBACK_FUNCTION();
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}
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}
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}
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else
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{
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if (0 == g_switches[0].debounce_cnt)
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{
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g_switches[0].active = false;
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}
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else
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{
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g_switches[0].debounce_cnt--;
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}
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}
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/* Check switch 2. */
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if (SW2 == SW_ACTIVE)
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{
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if (g_switches[1].active != true)
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{
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if (++g_switches[1].debounce_cnt >= g_sw_debounce_cnts)
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{
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/* Set this to true so we only call the callback function once per press. */
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g_switches[1].active = true;
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/* Call callback function. */
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SW2_CALLBACK_FUNCTION();
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}
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}
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}
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else
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{
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if (0 == g_switches[1].debounce_cnt)
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{
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g_switches[1].active = false;
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}
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else
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{
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g_switches[1].debounce_cnt--;
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}
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}
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/* Check switch 3. */
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if (SW3 == SW_ACTIVE)
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{
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if (g_switches[2].active != true)
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{
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if (++g_switches[2].debounce_cnt >= g_sw_debounce_cnts)
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{
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/* Set this to true so we only call the callback function once per press. */
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g_switches[2].active = true;
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/* Call callback function. */
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SW3_CALLBACK_FUNCTION();
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}
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}
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}
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else
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{
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if (0 == g_switches[2].debounce_cnt)
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{
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g_switches[2].active = false;
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}
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else
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{
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g_switches[2].debounce_cnt--;
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}
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}
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#endif /* SWITCHES_DETECTION_MODE */
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}
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