121 lines
3.5 KiB
C
121 lines
3.5 KiB
C
/****************************************************************************
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* arch/arm/src/s32k1xx/s32k1xx_pingpio.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <assert.h>
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#include <errno.h>
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#include "arm_arch.h"
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#include "hardware/s32k1xx_gpio.h"
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#include "s32k1xx_pin.h"
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#include <arch/board/board.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: s32k1xx_gpiowrite
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*
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* Description:
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* Write one or zero to the selected GPIO pin
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*
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****************************************************************************/
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void s32k1xx_gpiowrite(uint32_t pinset, bool value)
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{
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uintptr_t base;
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unsigned int port;
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unsigned int pin;
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DEBUGASSERT((pinset & _PIN_MODE_MASK) == _PIN_MODE_GPIO);
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DEBUGASSERT((pinset & _PIN_IO_MASK) == _PIN_OUTPUT);
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/* Get the port number and pin number */
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port = (pinset & _PIN_PORT_MASK) >> _PIN_PORT_SHIFT;
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pin = (pinset & _PIN_MASK) >> _PIN_SHIFT;
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DEBUGASSERT(port < S32K1XX_NPORTS);
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if (port < S32K1XX_NPORTS)
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{
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/* Get the base address of GPIO block for this port */
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base = S32K1XX_GPIO_BASE(port);
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/* Set or clear the output */
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if (value)
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{
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putreg32((1 << pin), base + S32K1XX_GPIO_PSOR_OFFSET);
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}
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else
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{
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putreg32((1 << pin), base + S32K1XX_GPIO_PCOR_OFFSET);
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}
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}
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}
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/****************************************************************************
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* Name: s32k1xx_gpioread
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*
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* Description:
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* Read one or zero from the selected GPIO pin
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*
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****************************************************************************/
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bool s32k1xx_gpioread(uint32_t pinset)
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{
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uintptr_t base;
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uint32_t regval;
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unsigned int port;
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unsigned int pin;
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bool ret = false;
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DEBUGASSERT((pinset & _PIN_MODE_MASK) == _PIN_MODE_GPIO);
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DEBUGASSERT((pinset & _PIN_IO_MASK) == _PIN_INPUT);
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/* Get the port number and pin number */
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port = (pinset & _PIN_PORT_MASK) >> _PIN_PORT_SHIFT;
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pin = (pinset & _PIN_MASK) >> _PIN_SHIFT;
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DEBUGASSERT(port < S32K1XX_NPORTS);
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if (port < S32K1XX_NPORTS)
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{
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/* Get the base address of GPIO block for this port */
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base = S32K1XX_GPIO_BASE(port);
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/* return the state of the pin */
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regval = getreg32(base + S32K1XX_GPIO_PDIR_OFFSET);
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ret = ((regval & (1 << pin)) != 0);
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}
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return ret;
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}
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