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/************************************************************************************
* arch/arm/src/lm3s/lm_gpio.h
*
* Copyright (C) 2009-2010, 2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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.
*
************************************************************************************/
#ifndef __ARCH_ARM_SRC_LM3S_LM_GPIO_H
#define __ARCH_ARM_SRC_LM3S_LM_GPIO_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <stdint.h>
#include <stdbool.h>
#include "up_internal.h"
#include "chip.h"
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* Bit-encoded input to lm3s_configgpio() *******************************************/
/* Encoding:
* FFFS SPPP IIIn nnnn nnnn nnnn VPPP PBBB
*
* These bits set the primary function of the pin:
* FFFn nnnn nnnn nnnn nnnn nnnn nnnn nnnn
*/
#define GPIO_FUNC_SHIFT 29 /* Bit 31-29: GPIO function */
#define GPIO_FUNC_MASK (7 << GPIO_FUNC_SHIFT) /* (See table 9-1 in data sheet) */
#define GPIO_FUNC_INPUT (0 << GPIO_FUNC_SHIFT) /* Digital GPIO input */
#define GPIO_FUNC_OUTPUT (1 << GPIO_FUNC_SHIFT) /* Digital GPIO output */
#define GPIO_FUNC_ODINPUT (2 << GPIO_FUNC_SHIFT) /* Open-drain GPIO input */
#define GPIO_FUNC_ODOUTPUT (3 << GPIO_FUNC_SHIFT) /* Open-drain GPIO output */
#define GPIO_FUNC_PFODIO (4 << GPIO_FUNC_SHIFT) /* Open-drain input/output (I2C) */
#define GPIO_FUNC_PFINPUT (5 << GPIO_FUNC_SHIFT) /* Digital input (Timer, CCP) */
#define GPIO_FUNC_PFOUTPUT (5 << GPIO_FUNC_SHIFT) /* Digital output (Timer, PWM, Comparator) */
#define GPIO_FUNC_PFIO (5 << GPIO_FUNC_SHIFT) /* Digital input/output (SSI, UART) */
#define GPIO_FUNC_ANINPUT (6 << GPIO_FUNC_SHIFT) /* Analog input (Comparator) */
#define GPIO_FUNC_INTERRUPT (7 << GPIO_FUNC_SHIFT) /* Interrupt function */
#define GPIO_FUNC_MAX GPIO_FUNC_INTERRUPT
/* That primary may be modified by the following options
* nnnS SPPP nnnn nnnn nnnn nnnn nnnn nnnn
*/
#define GPIO_STRENGTH_SHIFT 27 /* Bits 28-27: Pad drive strength */
#define GPIO_STRENGTH_MASK (3 << GPIO_STRENGTH_SHIFT)
#define GPIO_STRENGTH_2MA (0 << GPIO_STRENGTH_SHIFT) /* 2mA pad drive strength */
#define GPIO_STRENGTH_4MA (1 << GPIO_STRENGTH_SHIFT) /* 4mA pad drive strength */
#define GPIO_STRENGTH_8MA (2 << GPIO_STRENGTH_SHIFT) /* 8mA pad drive strength */
#define GPIO_STRENGTH_8MASC (3 << GPIO_STRENGTH_SHIFT) /* 8mA Pad drive with slew rate control */
#define GPIO_STRENGTH_MAX GPIO_STRENGTH_8MASC
#define GPIO_PADTYPE_SHIFT 24 /* Bits 26-24: Pad type */
#define GPIO_PADTYPE_MASK (7 << GPIO_PADTYPE_SHIFT)
#define GPIO_PADTYPE_STD (0 << GPIO_PADTYPE_SHIFT) /* Push-pull */
#define GPIO_PADTYPE_STDWPU (1 << GPIO_PADTYPE_SHIFT) /* Push-pull with weak pull-up */
#define GPIO_PADTYPE_STDWPD (2 << GPIO_PADTYPE_SHIFT) /* Push-pull with weak pull-down */
#define GPIO_PADTYPE_OD (3 << GPIO_PADTYPE_SHIFT) /* Open-drain */
#define GPIO_PADTYPE_ODWPU (4 << GPIO_PADTYPE_SHIFT) /* Open-drain with weak pull-up */
#define GPIO_PADTYPE_ODWPD (5 << GPIO_PADTYPE_SHIFT) /* Open-drain with weak pull-down */
#define GPIO_PADTYPE_ANALOG (6 << GPIO_PADTYPE_SHIFT) /* Analog comparator */
/* If the pin is an interrupt, then the following options apply
* nnnn nnnn IIIn nnnn nnnn nnnn nnnn nnnn
*/
#define GPIO_INT_SHIFT 21 /* Bits 23-21: Interrupt type */
#define GPIO_INT_MASK (7 << GPIO_INT_SHIFT)
#define GPIO_INT_FALLINGEDGE (0 << GPIO_INT_SHIFT) /* Interrupt on falling edge */
#define GPIO_INT_RISINGEDGE (1 << GPIO_INT_SHIFT) /* Interrupt on rising edge */
#define GPIO_INT_BOTHEDGES (2 << GPIO_INT_SHIFT) /* Interrupt on both edges */
#define GPIO_INT_LOWLEVEL (3 << GPIO_INT_SHIFT) /* Interrupt on low level */
#define GPIO_INT_HIGHLEVEL (4 << GPIO_INT_SHIFT) /* Interrupt on high level */
/* If the pin is an GPIO digital output, then this identifies the initial output value:
* nnnn nnnn nnnn nnnn nnnn nnnn Vnnn nnnn
*/
#define GPIO_VALUE_SHIFT 7 /* Bit 7: If output, inital value of output */
#define GPIO_VALUE_MASK (1 << GPIO_VALUE_SHIFT)
#define GPIO_VALUE_ZERO (0 << GPIO_VALUE_SHIFT) /* Initial value is zero */
#define GPIO_VALUE_ONE (1 << GPIO_VALUE_SHIFT) /* Initial value is one */
/* This identifies the GPIO port
* nnnn nnnn nnnn nnnn nnnn nnnn nPPP Pnnn
*/
#define GPIO_PORT_SHIFT 3 /* Bit 3-6: Port number */
#define GPIO_PORT_MASK (15 << GPIO_PORT_SHIFT)
#define GPIO_PORTA (0 << GPIO_PORT_SHIFT) /* GPIOA */
#define GPIO_PORTB (1 << GPIO_PORT_SHIFT) /* GPIOB */
#define GPIO_PORTC (2 << GPIO_PORT_SHIFT) /* GPIOC */
#define GPIO_PORTD (3 << GPIO_PORT_SHIFT) /* GPIOD */
#define GPIO_PORTE (4 << GPIO_PORT_SHIFT) /* GPIOE */
#define GPIO_PORTF (5 << GPIO_PORT_SHIFT) /* GPIOF */
#define GPIO_PORTG (6 << GPIO_PORT_SHIFT) /* GPIOG */
#define GPIO_PORTH (7 << GPIO_PORT_SHIFT) /* GPIOH */
#define GPIO_PORTJ (8 << GPIO_PORT_SHIFT) /* GPIOJ */
/* This identifies the bit in the port:
* nnnn nnnn nnnn nnnn nnnn nnnn nnnn nBBB
*/
#define GPIO_NUMBER_SHIFT 0 /* Bits 0-2: GPIO number: 0-7 */
#define GPIO_NUMBER_MASK (7 << GPIO_NUMBER_SHIFT)
/************************************************************************************
* Public Types
************************************************************************************/
/************************************************************************************
* Inline Functions
************************************************************************************/
#ifndef __ASSEMBLY__
/************************************************************************************
* Public Data
************************************************************************************/
#if defined(__cplusplus)
extern "C"
{
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: lm3s_configgpio
*
* Description:
* Configure a GPIO pin based on bit-encoded description of the pin.
*
****************************************************************************/
int lm3s_configgpio(uint32_t cfgset);
/****************************************************************************
* Name: lm3s_gpiowrite
*
* Description:
* Write one or zero to the selected GPIO pin
*
****************************************************************************/
void lm3s_gpiowrite(uint32_t pinset, bool value);
/****************************************************************************
* Name: lm3s_gpioread
*
* Description:
* Read one or zero from the selected GPIO pin
*
****************************************************************************/
bool lm3s_gpioread(uint32_t pinset, bool value);
/****************************************************************************
* Function: lm3s_dumpgpio
*
* Description:
* Dump all GPIO registers associated with the provided base address
*
****************************************************************************/
int lm3s_dumpgpio(uint32_t pinset, const char *msg);
/****************************************************************************
* Name: gpio_irqinitialize
*
* Description:
* Initialize all vectors to the unexpected interrupt handler
*
****************************************************************************/
int weak_function gpio_irqinitialize(void);
#if defined(__cplusplus)
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_ARM_SRC_LM3S_LM_GPIO_H */
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