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/************************************************************************************
* arch/arm/src/tiva/tiva_gpio.h
*
* Copyright (C) 2009-2010, 2013-2014 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_TIVA_TIVA_GPIO_H
#define __ARCH_ARM_SRC_TIVA_TIVA_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 tiva_configgpio() *******************************************/
/* Encoding:
*
* LM3S: FFFS SPPP III. .... .... ...V PPPP PBBB
* LM4F: FFFS SPPP III. AAAA .... ...V PPPP PBBB
* TM4C: FFFS SPPP III. AAAA .... ...V PPPP PBBB
*
* TODO: The LM4F/TM4C also support configuration of pins to trigger ADC and/or uDMA.
* That configuration is not addressed in this this encoding.
*/
/* These bits set the primary function of the pin:
*
* FFFn .... .... .... .... .... .... ....
*/
#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 (ADC, Comparator) */
# define GPIO_FUNC_ANIO (6 << GPIO_FUNC_SHIFT) /* REVISIT: Analog input/output (USB) */
# 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
*
* ...S SPPP .... .... .... .... .... ....
*/
#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
*
* .... .... III. .... .... .... .... ....
*/
#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 */
/* The LM4F/TM4C supports up to 15 alternate functions per pin:
*
* LM4F: .... .... .... AAAA .... .... .... ....
* TM4C: .... .... .... AAAA .... .... .... ....
*/
#if defined(LM4F) || defined(TM4C)
# define GPIO_ALT_SHIFT 16 /* Bits 16-19: Alternate function */
# define GPIO_ALT_MASK (15 << GPIO_ALT_SHIFT)
# define GPIO_ALT(n) ((n) << GPIO_ALT_SHIFT)
# define GPIO_ALT_NONE (0 << GPIO_ALT_SHIFT)
# define GPIO_ALT_1 (1 << GPIO_ALT_SHIFT)
# define GPIO_ALT_2 (2 << GPIO_ALT_SHIFT)
# define GPIO_ALT_3 (3 << GPIO_ALT_SHIFT)
# define GPIO_ALT_4 (4 << GPIO_ALT_SHIFT)
# define GPIO_ALT_5 (5 << GPIO_ALT_SHIFT)
# define GPIO_ALT_6 (6 << GPIO_ALT_SHIFT)
# define GPIO_ALT_7 (7 << GPIO_ALT_SHIFT)
# define GPIO_ALT_8 (8 << GPIO_ALT_SHIFT)
# define GPIO_ALT_9 (9 << GPIO_ALT_SHIFT)
# define GPIO_ALT_10 (10 << GPIO_ALT_SHIFT)
# define GPIO_ALT_11 (11 << GPIO_ALT_SHIFT)
# define GPIO_ALT_12 (12 << GPIO_ALT_SHIFT)
# define GPIO_ALT_13 (13 << GPIO_ALT_SHIFT)
# define GPIO_ALT_14 (14 << GPIO_ALT_SHIFT)
# define GPIO_ALT_15 (15 << GPIO_ALT_SHIFT)
#endif
/* If the pin is an GPIO digital output, then this identifies the initial output value:
* .... .... .... .... .... ...V .... ....
*/
#define GPIO_VALUE_SHIFT 8 /* Bit 8: 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
* .... .... .... .... .... .... .PPP P...
*/
#define GPIO_PORT_SHIFT 3 /* Bit 3-7: Port number */
#define GPIO_PORT_MASK (31 << 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 */
# define GPIO_PORTK (9 << GPIO_PORT_SHIFT) /* GPIOK */
# define GPIO_PORTL (10 << GPIO_PORT_SHIFT) /* GPIOL */
# define GPIO_PORTM (11 << GPIO_PORT_SHIFT) /* GPIOM */
# define GPIO_PORTN (12 << GPIO_PORT_SHIFT) /* GPION */
# define GPIO_PORTP (13 << GPIO_PORT_SHIFT) /* GPIOP */
# define GPIO_PORTQ (14 << GPIO_PORT_SHIFT) /* GPIOQ */
# define GPIO_PORTR (15 << GPIO_PORT_SHIFT) /* GPIOR */
# define GPIO_PORTS (16 << GPIO_PORT_SHIFT) /* GPIOS */
# define GPIO_PORTT (17 << GPIO_PORT_SHIFT) /* GPIOT */
/* This identifies the pin number in the port:
* .... .... .... .... .... .... .... .BBB
*/
#define GPIO_PIN_SHIFT 0 /* Bits 0-2: GPIO pin: 0-7 */
#define GPIO_PIN_MASK (7 << GPIO_PIN_SHIFT)
# define GPIO_PIN_0 (0 << GPIO_PIN_SHIFT)
# define GPIO_PIN_1 (1 << GPIO_PIN_SHIFT)
# define GPIO_PIN_2 (2 << GPIO_PIN_SHIFT)
# define GPIO_PIN_3 (3 << GPIO_PIN_SHIFT)
# define GPIO_PIN_4 (4 << GPIO_PIN_SHIFT)
# define GPIO_PIN_5 (5 << GPIO_PIN_SHIFT)
# define GPIO_PIN_6 (6 << GPIO_PIN_SHIFT)
# define GPIO_PIN_7 (7 << GPIO_PIN_SHIFT)
/************************************************************************************
* Public Types
************************************************************************************/
/************************************************************************************
* Inline Functions
************************************************************************************/
#ifndef __ASSEMBLY__
/************************************************************************************
* Public Data
************************************************************************************/
#if defined(__cplusplus)
extern "C"
{
#endif
/************************************************************************************
* Public Function Prototypes
************************************************************************************/
/************************************************************************************
* Name: tiva_configgpio
*
* Description:
* Configure a GPIO pin based on bit-encoded description of the pin.
*
************************************************************************************/
int tiva_configgpio(uint32_t cfgset);
/************************************************************************************
* Name: tiva_gpiowrite
*
* Description:
* Write one or zero to the selected GPIO pin
*
************************************************************************************/
void tiva_gpiowrite(uint32_t pinset, bool value);
/************************************************************************************
* Name: tiva_gpioread
*
* Description:
* Read one or zero from the selected GPIO pin
*
************************************************************************************/
bool tiva_gpioread(uint32_t pinset);
/************************************************************************************
* Function: tiva_dumpgpio
*
* Description:
* Dump all GPIO registers associated with the provided base address
*
************************************************************************************/
int tiva_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_TIVA_TIVA_GPIO_H */
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