PIC32MZ: Add file for GPIO interrupt support. There are issues so configuration is EXPERIMENTAL for now
This commit is contained in:
Gregory Nutt
parent
1851c98ac7
commit
3dab31e5fd
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@ -1003,6 +1003,13 @@ config PIC32MX_USBPRIO
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endmenu
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config PIC32MX_GPIOIRQ
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bool "GPIO Interrupt"
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default n
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depends on EXPERIMENTAL
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---help---
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Build in support for interrupts based on GPIO inputs from IOPorts
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menu "PIC32MX PHY/Ethernet device driver settings"
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depends on PIC32MX_ETHERNET
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@ -74,7 +74,7 @@ ifneq ($(CONFIG_SCHED_TICKLESS),y)
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CHIP_CSRCS += pic32mx-timerisr.c
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endif
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ifeq ($(CONFIG_GPIO_IRQ),y)
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ifeq ($(CONFIG_PIC32MX_GPIOIRQ),y)
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CHIP_CSRCS += pic32mx_gpioirq.c
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endif
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@ -50,7 +50,7 @@
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#include "pic32mx-gpio.h"
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#include "pic32mx-internal.h"
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#ifdef CONFIG_GPIO_IRQ
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#ifdef CONFIG_PIC32MX_GPIOIRQ
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/****************************************************************************
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* Pre-processor Definitions
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@ -285,4 +285,4 @@ void pic32mx_gpioirqdisable(unsigned int cn)
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putreg32(1 << cn, PIC32MX_IOPORT_CNENCLR);
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}
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#endif /* CONFIG_GPIO_IRQ */
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#endif /* CONFIG_PIC32MX_GPIOIRQ */
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@ -305,7 +305,7 @@ bool pic32mx_gpioread(uint16_t pinset);
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*
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************************************************************************************/
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#ifdef CONFIG_GPIO_IRQ
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#ifdef CONFIG_PIC32MX_GPIOIRQ
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void pic32mx_gpioirqinitialize(void);
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#else
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# define pic32mx_gpioirqinitialize()
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@ -336,7 +336,7 @@ void pic32mx_gpioirqinitialize(void);
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*
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************************************************************************************/
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#ifdef CONFIG_GPIO_IRQ
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#ifdef CONFIG_PIC32MX_GPIOIRQ
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xcpt_t pic32mx_gpioattach(uint32_t pinset, unsigned int cn, xcpt_t handler);
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#else
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# define pic32mx_gpioattach(p,f) (NULL)
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@ -350,7 +350,7 @@ xcpt_t pic32mx_gpioattach(uint32_t pinset, unsigned int cn, xcpt_t handler);
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*
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************************************************************************************/
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#ifdef CONFIG_GPIO_IRQ
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#ifdef CONFIG_PIC32MX_GPIOIRQ
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void pic32mx_gpioirqenable(unsigned int cn);
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#else
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# define pic32mx_gpioirqenable(irq)
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@ -364,7 +364,7 @@ void pic32mx_gpioirqenable(unsigned int cn);
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*
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************************************************************************************/
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#ifdef CONFIG_GPIO_IRQ
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#ifdef CONFIG_PIC32MX_GPIOIRQ
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void pic32mx_gpioirqdisable(unsigned int cn);
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#else
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# define pic32mx_gpioirqdisable(irq)
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@ -149,7 +149,7 @@ void up_irqinitialize(void)
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/* Initialize GPIO change notification handling */
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#ifdef CONFIG_GPIO_IRQ
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#ifdef CONFIG_PIC32MX_GPIOIRQ
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pic32mx_gpioirqinitialize();
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#endif
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@ -248,6 +248,13 @@ config PIC32MZ_CTMU
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endmenu
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config PIC32MZ_GPIOIRQ
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bool "GPIO Interrupt"
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default n
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depends on EXPERIMENTAL
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---help---
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Build in support for interrupts based on GPIO inputs from IOPorts
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config PIC32MZ_T1_SOSC
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bool
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default n
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@ -257,14 +264,14 @@ menu "PIC32MZ PHY/Ethernet device driver settings"
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depends on PIC32MZ_ETHERNET
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config PHY_AUTONEG
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bool "Auto-negotion"
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bool "Auto-negotiation"
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default y
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depends on PIC32MZ_ETHERNET
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---help---
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Enable auto-negotion
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Enable auto-negotiation
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config PHY_SPEED100
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bool "100Mbps spped"
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bool "100Mbps speed"
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default n
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depends on PIC32MZ_ETHERNET && !PHY_AUTONEG
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---help---
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@ -69,3 +69,7 @@ CHIP_CSRCS += pic32mz-irq.c pic32mz-timerisr.c pic32mz-gpio.c
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CHIP_CSRCS += pic32mz-lowconsole.c pic32mz-serial.c
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# Configuration-dependent PIC32MZ files
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ifeq ($(CONFIG_PIC32MZ_GPIOIRQ),y)
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CHIP_CSRCS += pic32mz-gpioirq.c
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endif
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@ -175,7 +175,7 @@ bool pic32mz_gpioread(uint16_t pinset);
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*
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************************************************************************************/
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#ifdef CONFIG_GPIO_IRQ
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#ifdef CONFIG_PIC32MZ_GPIOIRQ
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void pic32mz_gpioirqinitialize(void);
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#else
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# define pic32mz_gpioirqinitialize()
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@ -206,7 +206,7 @@ void pic32mz_gpioirqinitialize(void);
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*
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************************************************************************************/
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#ifdef CONFIG_GPIO_IRQ
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#ifdef CONFIG_PIC32MZ_GPIOIRQ
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xcpt_t pic32mz_gpioattach(uint32_t pinset, unsigned int cn, xcpt_t handler);
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#else
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# define pic32mz_gpioattach(p,f) (NULL)
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@ -220,7 +220,7 @@ xcpt_t pic32mz_gpioattach(uint32_t pinset, unsigned int cn, xcpt_t handler);
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*
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************************************************************************************/
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#ifdef CONFIG_GPIO_IRQ
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#ifdef CONFIG_PIC32MZ_GPIOIRQ
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void pic32mz_gpioirqenable(unsigned int cn);
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#else
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# define pic32mz_gpioirqenable(irq)
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@ -234,7 +234,7 @@ void pic32mz_gpioirqenable(unsigned int cn);
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*
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************************************************************************************/
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#ifdef CONFIG_GPIO_IRQ
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#ifdef CONFIG_PIC32MZ_GPIOIRQ
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void pic32mz_gpioirqdisable(unsigned int cn);
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#else
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# define pic32mz_gpioirqdisable(irq)
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@ -0,0 +1,288 @@
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/****************************************************************************
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* arch/mips/src/pic32mz/pic32mz-gpio.c
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <assert.h>
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#include <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include <arch/board/board.h>
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#include "up_arch.h"
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#include "chip/pic32mz-ioport.h"
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#include "pic32mz-gpio.h"
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#ifdef CONFIG_PIC32MZ_GPIOIRQ
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static xcpt_t g_cnisrs[IOPORT_NUMCN];
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: Inline PIN set field extractors
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****************************************************************************/
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static inline bool pic32mz_input(uint16_t pinset)
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{
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return ((pinset & GPIO_MODE_MASK) != GPIO_INPUT);
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}
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static inline bool pic32mz_interrupt(uint16_t pinset)
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{
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return ((pinset & GPIO_INTERRUPT) != 0);
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}
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static inline bool pic32mz_pullup(uint16_t pinset)
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{
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return ((pinset & GPIO_INT_MASK) == GPIO_PUINT);
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}
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/****************************************************************************
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* Name: pic32mz_cninterrupt
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*
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* Description:
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* Change notification interrupt handler.
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*
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****************************************************************************/
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static int pic32mz_cninterrupt(int irq, FAR void *context)
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{
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int status;
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int ret = OK;
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int i;
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/* Call all attached handlers */
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for (i = 0; i < IOPORT_NUMCN; i++)
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{
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/* Is this one attached */
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if (g_cnisrs[i])
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{
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/* Call the attached handler */
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status = g_cnisrs[i](irq, context);
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/* Keep track of the status of the last handler that failed */
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if (status < 0)
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{
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ret = status;
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}
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}
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/* Clear the pending interrupt */
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up_clrpend_irq(PIC32MZ_IRQ_CN);
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return ret;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pic32mz_gpioirqinitialize
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*
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* Description:
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* Initialize logic to support a GPIO change notification interrupts.
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* This function is called internally by the system on power up and should
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* not be called again.
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*
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****************************************************************************/
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void pic32mz_gpioirqinitialize(void)
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{
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int ret;
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/* Attach the change notice interrupt handler */
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ret = irqattach(PIC32MZ_IRQ_CN, pic32mz_cninterrupt);
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DEBUGASSERT(ret == OK);
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/* Set the interrupt priority */
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#ifdef CONFIG_ARCH_IRQPRIO
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ret = up_prioritize_irq(PIC32MZ_IRQ_CN, CONFIG_PIC32MZ_CNPRIO);
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DEBUGASSERT(ret == OK);
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#endif
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/* Reset all registers and enable the CN module */
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putreg32(IOPORT_CN_ALL, PIC32MZ_IOPORT_CNENCLR);
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putreg32(IOPORT_CN_ALL, PIC32MZ_IOPORT_CNPUECLR);
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putreg32(IOPORT_CNCON_ON, PIC32MZ_IOPORT_CNCON);
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/* And enable the GPIO interrupt */
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ret = up_enable_irq(PIC32MZ_IRQSRC_CN);
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DEBUGASSERT(ret == OK);
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}
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/****************************************************************************
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* Name: pic32mz_gpioattach
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*
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* Description:
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* Attach an interrupt service routine to a GPIO interrupt. This will
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* also reconfigure the pin as an interrupting input. The change
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* notification number is associated with all interrupt-capabile GPIO pins.
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* The association could, however, differ from part to part and must be
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* provided by the caller.
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*
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* When an interrupt occurs, it is due to a change on the GPIO input pin.
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* In that case, all attached handlers will be called. Each handler must
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* maintain state and determine if the unlying GPIO input value changed.
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*
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* Parameters:
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* - pinset: GPIO pin configuration
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* - cn: The change notification number associated with the pin.
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* - handler: Interrupt handler (may be NULL to detach)
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*
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* Returns:
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* The previous value of the interrupt handler function pointer. This
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* value may, for example, be used to restore the previous handler when
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* multiple handlers are used.
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*
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****************************************************************************/
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xcpt_t pic32mz_gpioattach(uint32_t pinset, unsigned int cn, xcpt_t handler)
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{
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xcpt_t oldhandler = NULL;
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irqstate_t flags;
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DEBUGASSERT(cn < IOPORT_NUMCN);
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/* First verify that the pinset is configured as an interrupting input */
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if (pic32mz_input(pinset) && pic32mz_interrupt(pinset))
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{
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/* Get the previously attached handler as the return value */
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flags = irqsave();
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oldhandler = g_cnisrs[cn];
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/* Are we attaching or detaching? */
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if (handler != NULL)
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{
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/* Attaching... Make sure that the GPIO is properly configured as
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* an input
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*/
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pic32mz_configgpio(pinset);
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/* Pull-up requested? */
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if (pic32mz_pullup(pinset))
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{
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putreg32(1 << cn, PIC32MZ_IOPORT_CNPUESET);
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}
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else
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{
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putreg32(1 << cn, PIC32MZ_IOPORT_CNPUECLR);
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}
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}
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else
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{
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/* Make sure that any further interrupts are disabled.
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* (disable the pull-up as well).
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*/
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putreg32(1 << cn, PIC32MZ_IOPORT_CNENCLR);
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putreg32(1 << cn, PIC32MZ_IOPORT_CNPUECLR);
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}
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/* Set the new handler (perhaps NULLifying the current handler) */
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g_cnisrs[cn] = handler;
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irqrestore(flags);
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}
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return oldhandler;
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}
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/****************************************************************************
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* Name: pic32mz_gpioirqenable
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*
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* Description:
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* Enable the interrupt for specified GPIO IRQ
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*
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****************************************************************************/
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void pic32mz_gpioirqenable(unsigned int cn)
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{
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DEBUGASSERT(cn < IOPORT_NUMCN);
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putreg32(1 << cn, PIC32MZ_IOPORT_CNENSET);
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}
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/****************************************************************************
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* Name: pic32mz_gpioirqdisable
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*
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* Description:
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* Disable the interrupt for specified GPIO IRQ
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*
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****************************************************************************/
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void pic32mz_gpioirqdisable(unsigned int cn)
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{
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DEBUGASSERT(cn < IOPORT_NUMCN);
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putreg32(1 << cn, PIC32MZ_IOPORT_CNENCLR);
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}
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#endif /* CONFIG_PIC32MZ_GPIOIRQ */
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@ -229,7 +229,7 @@ void up_irqinitialize(void)
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/* Initialize GPIO change notification handling */
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#ifdef CONFIG_GPIO_IRQ
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#ifdef CONFIG_PIC32MZ_GPIOIRQ
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pic32mz_gpioirqinitialize();
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#endif
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