diff options
Diffstat (limited to 'nuttx/arch/arm/src/kinetis/kinetis_pinirq.c')
| -rw-r--r-- | nuttx/arch/arm/src/kinetis/kinetis_pinirq.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/kinetis/kinetis_pinirq.c b/nuttx/arch/arm/src/kinetis/kinetis_pinirq.c new file mode 100644 index 000000000..fdb9f8dc8 --- /dev/null +++ b/nuttx/arch/arm/src/kinetis/kinetis_pinirq.c @@ -0,0 +1,211 @@ +/**************************************************************************** + * arch/arm/src/kinetis/kinetis_pinirq.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <arch/board/board.h> +#include <nuttx/config.h> + +#include <nuttx/arch.h> +#include "up_internal.h" + +#ifdef CONFIG_GPIO_IRQ + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ +/* Configuration ************************************************************/ + +#ifdndef CONFIG_KINESIS_NGPIOIRQS +# define CONFIG_KINESIS_NGPIOIRQS 8 +#endif + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/************************************************************************************ + * Name: kinetis_pinirqinitialize + * + * Description: + * Initialize logic to support a second level of interrupt decoding for GPIO pins. + * + ************************************************************************************/ + +void kinetis_pinirqinitialize(void) +{ +# warning "Missing logic" +} + +/************************************************************************************ + * Name: kinetis_pinirqconfig + * + * Description: + * Sets/clears PIN and interrupt triggers. On return PIN interrupts are always + * disabled. + * + * Parameters: + * - pinset: Pin configuration + * - pinisr: Pin interrupt service routine + * + * Returns: + * The previous value of the interrupt handler function pointer. This value may, + * for example, be used to restore the previous handler when multiple handlers are + * used. + * + ************************************************************************************/ + +xcpt_t kinetis_pinirqconfig(uint32_t pinset, xcpt_t pinisr) +{ + + /* It only makes sense to call this function for input pins that are configured + * as interrupts. + */ + + DEBUGASSERT((pinset & _PIN_INTDMA_MASK) == _PIN_INTERRUPT); + DEBUGASSERT((pinset & _PIN_IO_MASK) == _PIN_INPUT); + +# warning "Missing logic" + return NULL; +} + +/************************************************************************************ + * Name: kinetis_pinirqenable + * + * Description: + * Enable the interrupt for specified pin IRQ + * + ************************************************************************************/ + +void kinetis_pinirqenable(uint32_t pinset) +{ + uintptr_t base; + uint32_t regval; + unsigned int port; + unsigned int pin; + + /* Get the port number and pin number */ + + port = (pinset & _PIN_PORT_MASK) >> _PIN_PORT_SHIFT; + pin = (pinset & _PIN_MASK) >> _PIN_SHIFT; + + DEBUGASSERT(port < KINETIS_NPORTS); + if (port < KINETIS_NPORTS) + { + /* Modify the IRQC field of the port PCR register in order to enable + * the interrupt. + */ + + regval = getreg32(base + KINETIS_PORT_PCR_OFFSET(pin)); + regval &= ~PORT_PCR_IRQC_MASK; + + switch (pinset & _PIN_INT_MASK) + { + case PIN_INT_ZERO : /* Interrupt when logic zero */ + regval |= PORT_PCR_IRQC_ZERO; + break; + + case PIN_INT_RISING : /* Interrupt on rising edge*/ + regval |= PORT_PCR_IRQC_RISING; + break; + + case PIN_INT_BOTH : /* Interrupt on falling edge */ + regval |= PORT_PCR_IRQC_FALLING; + break; + + case PIN_DMA_FALLING : /* nterrupt on either edge */ + regval |= PORT_PCR_IRQC_BOTH; + break; + + case PIN_INT_ONE : /* IInterrupt when logic one */ + regval |= PORT_PCR_IRQC_ONE; + break; + + default: + return; + } + + putreg32(regval, base + KINETIS_PORT_PCR_OFFSET(pin)); + } +} + +/************************************************************************************ + * Name: kinetis_pinirqdisable + * + * Description: + * Disable the interrupt for specified pin + * + ************************************************************************************/ + +void kinetis_pinirqdisable(uint32_t pinset) +{ + uintptr_t base; + uint32_t regval; + unsigned int port; + unsigned int pin; + + /* Get the port number and pin number */ + + port = (pinset & _PIN_PORT_MASK) >> _PIN_PORT_SHIFT; + pin = (pinset & _PIN_MASK) >> _PIN_SHIFT; + + DEBUGASSERT(port < KINETIS_NPORTS); + if (port < KINETIS_NPORTS) + { + /* Clear the IRQC field of the port PCR register in order to disable + * the interrupt. + */ + + regval = getreg32(base + KINETIS_PORT_PCR_OFFSET(pin)); + regval &= ~PORT_PCR_IRQC_MASK; + putreg32(regval, base + KINETIS_PORT_PCR_OFFSET(pin)); + } +} + +#endif /* CONFIG_GPIO_IRQ */ |