366 lines
15 KiB
C
366 lines
15 KiB
C
/************************************************************************************
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* arch/arm/src/sam34/sam4l_gpio.h
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*
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* Copyright (C) 2013 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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#ifndef __ARCH_ARM_SRC_SAM34_SAM4L_GPIO_H
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#define __ARCH_ARM_SRC_SAM34_SAM4L_GPIO_H
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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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/************************************************************************************
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* Definitions
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************************************************************************************/
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/* Bit-encoded input to sam_configgpio() ********************************************/
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/* 24-bit Encoding. This could be compacted into 16-bits by making the bit usage
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* mode specific. However, by giving each bit field a unique position, we handle
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* bad combinations of properties safely.
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*
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* MODE BITFIELDS
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* ------------ -----------------------------
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* 2222 1111 1111 1100 0000 0000
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* 3210 9876 5432 1098 7654 3210
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* ------------ -----------------------------
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* GPIO Input: MMRR .... .... IIGT .PPB BBBB
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* GPIO Output: MM.. .... DDSV .... .PPB BBBB
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* Peripheral: MM.. FFFE .... IIG. .PPB BBBB
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* ------------ -----------------------------
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* MMRR FFFE DDSV IIGT .PPB BBBB
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*/
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/* Input/output/peripheral mode:
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*
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* MODE BITFIELDS
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* ------------ -----------------------------
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* 2222 1111 1111 1100 0000 0000
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* 3210 9876 5432 1098 7654 3210
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* ------------ -----------------------------
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* GPIO Input: MM.. .... .... .... .... ....
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* GPIO Output: MM.. .... .... .... .... ....
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* Peripheral: MM.. .... .... .... .... ....
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*/
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#define GPIO_MODE_SHIFT (22) /* Bits 22-23: GPIO mode */
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#define GPIO_MODE_MASK (3 << GPIO_MODE_SHIFT)
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# define GPIO_INPUT (0 << GPIO_MODE_SHIFT) /* GPIO Input */
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# define GPIO_OUTPUT (1 << GPIO_MODE_SHIFT) /* GPIO Output */
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# define GPIO_PERIPHERAL (2 << GPIO_MODE_SHIFT) /* Controlled by peripheral */
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# define GPIO_INTERRUPT (3 << GPIO_MODE_SHIFT) /* Interrupting input */
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/* Pull-up/down resistor control for inputs
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*
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* MODE BITFIELDS
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* ------------ -----------------------------
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* 2222 1111 1111 1100 0000 0000
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* 3210 9876 5432 1098 7654 3210
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* ------------ -----------------------------
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* GPIO Input: ..RR .... .... .... .... ....
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* GPIO Output: .... .... .... .... .... ....
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* Peripheral: .... .... .... .... .... ....
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*/
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#define GPIO_PULL_SHIFT (20) /* Bits 20-21: Pull-up/down resistor control */
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#define GPIO_PULL_MASK (3 << GPIO_PULL_SHIFT)
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# define GPIO_PULL_NONE (0 << GPIO_PULL_SHIFT)
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# define GPIO_PULL_UP (1 << GPIO_PULL_SHIFT)
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# define GPIO_PULL_DOWN (2 << GPIO_PULL_SHIFT)
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# define GPIO_PULL_BUSKEEPER (3 << GPIO_PULL_SHIFT)
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/* Peripheral Function
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*
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* MODE BITFIELDS
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* ------------ -----------------------------
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* 2222 1111 1111 1100 0000 0000
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* 3210 9876 5432 1098 7654 3210
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* ------------ -----------------------------
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* GPIO Input: .... .... .... .... .... ....
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* GPIO Output: .... .... .... .... .... ....
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* Peripheral: .... FFF. .... .... .... ....
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*/
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#define GPIO_FUNC_SHIFT (17) /* Bits 17-19: Peripheral function */
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#define GPIO_FUNC_MASK (7 << GPIO_FUNC_SHIFT)
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# define _GPIO_FUNCA (0 << GPIO_FUNC_SHIFT) /* Function A */
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# define _GPIO_FUNCB (1 << GPIO_FUNC_SHIFT) /* Function B */
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# define _GPIO_FUNCC (2 << GPIO_FUNC_SHIFT) /* Function C */
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# define _GPIO_FUNCD (3 << GPIO_FUNC_SHIFT) /* Function D */
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# define _GPIO_FUNCE (4 << GPIO_FUNC_SHIFT) /* Function E */
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# define _GPIO_FUNCF (5 << GPIO_FUNC_SHIFT) /* Function F */
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# define _GPIO_FUNCG (6 << GPIO_FUNC_SHIFT) /* Function G */
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# define _GPIO_FUNCH (7 << GPIO_FUNC_SHIFT) /* Function H */
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/* Extended input/output/peripheral mode:
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*
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* MODE BITFIELDS
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* ------------ -----------------------------
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* 2222 1111 1111 1100 0000 0000
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* 3210 9876 5432 1098 7654 3210
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* ------------ -----------------------------
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* GPIO Input: .... .... .... .... .... ....
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* GPIO Output: .... .... .... .... .... ....
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* Peripheral: MM.. FFF. .... .... .... ....
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*/
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#define GPIO_FUNCA (GPIO_PERIPHERAL | _GPIO_FUNCA) /* Function A */
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#define GPIO_FUNCB (GPIO_PERIPHERAL | _GPIO_FUNCB) /* Function B */
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#define GPIO_FUNCC (GPIO_PERIPHERAL | _GPIO_FUNCC) /* Function C */
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#define GPIO_FUNCD (GPIO_PERIPHERAL | _GPIO_FUNCD) /* Function D */
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#define GPIO_FUNCE (GPIO_PERIPHERAL | _GPIO_FUNCE) /* Function E */
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#define GPIO_FUNCF (GPIO_PERIPHERAL | _GPIO_FUNCF) /* Function F */
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#define GPIO_FUNCG (GPIO_PERIPHERAL | _GPIO_FUNCG) /* Function G */
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#define GPIO_FUNCH (GPIO_PERIPHERAL | _GPIO_FUNCH) /* Function H */
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/* Peripheral event control
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*
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* MODE BITFIELDS
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* ------------ -----------------------------
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* 2222 1111 1111 1100 0000 0000
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* 3210 9876 5432 1098 7654 3210
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* ------------ -----------------------------
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* GPIO Input: .... .... .... .... .... ....
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* GPIO Output: .... .... .... .... .... ....
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* Peripheral: .... ...E .... .... .... ....
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*/
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#define GPIO_PERIPH_EVENTS (1 << 16) /* Bit 16: Enable peripheral events */
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/* Output drive control
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*
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* MODE BITFIELDS
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* ------------ -----------------------------
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* 2222 1111 1111 1100 0000 0000
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* 3210 9876 5432 1098 7654 3210
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* ------------ -----------------------------
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* GPIO Input: .... .... .... .... .... ....
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* GPIO Output: .... .... DD.. .... .... ....
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* Peripheral: .... .... .... .... .... ....
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*/
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#define GPIO_DRIVE_SHIFT (14) /* Bits 14-15: Interrupting input control */
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#define GPIO_DRIVE_MASK (3 << GPIO_INT_SHIFT) /* Lowest drive strength*/
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# define GPIO_DRIVE_LOW (0 << GPIO_INT_SHIFT)
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# define GPIO_DRIVE_MEDLOW (1 << GPIO_INT_SHIFT)
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# define GPIO_DRIVE_MEDHIGH (2 << GPIO_INT_SHIFT)
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# define GPIO_DRIVE_HIGH (3 << GPIO_INT_SHIFT) /* Highest drive strength */
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/* Output slew rate control
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*
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* MODE BITFIELDS
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* ------------ -----------------------------
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* 2222 1111 1111 1100 0000 0000
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* 3210 9876 5432 1098 7654 3210
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* ------------ -----------------------------
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* GPIO Input: .... .... .... .... .... ....
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* GPIO Output: .... .... ..S. .... .... ....
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* Peripheral: .... .... .... .... .... ....
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*/
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#define GPIO_SLEW (1 << 13) /* Bit 13: Enable output slew control */
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/* If the pin is an GPIO output, then this identifies the initial output value:
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*
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* MODE BITFIELDS
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* ------------ -----------------------------
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* 2222 1111 1111 1100 0000 0000
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* 3210 9876 5432 1098 7654 3210
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* ------------ -----------------------------
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* GPIO Input: .... .... .... .... .... ....
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* GPIO Output: .... .... ...V .... .... ....
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* Peripheral: .... .... .... .... .... ....
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*/
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#define GPIO_OUTPUT_SET (1 << 12) /* Bit 12: Inital value of output */
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#define GPIO_OUTPUT_CLEAR (0)
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/* Selections for an interrupting input and peripheral events:
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*
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* MODE BITFIELDS
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* ------------ -----------------------------
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* 2222 1111 1111 1100 0000 0000
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* 3210 9876 5432 1098 7654 3210
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* ------------ -----------------------------
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* GPIO Input: .... .... .... II.. .... ....
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* GPIO Output: .... .... .... .... .... ....
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* Peripheral: .... .... .... II.. .... ....
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*/
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#define GPIO_INT_SHIFT (10) /* Bits 10-11: Interrupting input control */
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#define GPIO_INT_MASK (3 << GPIO_INT_SHIFT)
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# define GPIO_INT_CHANGE (0 << GPIO_INT_SHIFT) /* Pin change */
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# define GPIO_INT_RISING (1 << GPIO_INT_SHIFT) /* Rising edge */
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# define GPIO_INT_FALLING (2 << GPIO_INT_SHIFT) /* Falling edge */
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/* These combinations control events. These help to clean up pin definitions. */
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#define GPIO_EVENT_CHANGE (GPIO_PERIPH_EVENTS | GPIO_INT_CHANGE) /* Pin change */
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#define GPIO_EVENT_RISING (GPIO_PERIPH_EVENTS | GPIO_INT_RISING) /* Rising edge */
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#define GPIO_EVENT_FALLING (GPIO_PERIPH_EVENTS | GPIO_INT_FALLING) /* Falling edge */
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/* Enable input/periphal glitch filter
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*
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* MODE BITFIELDS
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* ------------ -----------------------------
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* 2222 1111 1111 1100 0000 0000
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* 3210 9876 5432 1098 7654 3210
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* ------------ -----------------------------
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* GPIO Input: .... .... .... ..G. .... ....
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* GPIO Output: .... .... .... .... .... ....
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* Peripheral: .... .... .... ..G. .... ....
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*/
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#define GPIO_GLITCH_FILTER (1 << 9) /* Bit 9: Enable input/peripheral glitch filter */
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/* Input Schmitt trigger
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*
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* MODE BITFIELDS
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* ------------ -----------------------------
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* 2222 1111 1111 1100 0000 0000
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* 3210 9876 5432 1098 7654 3210
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* ------------ -----------------------------
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* GPIO Input: .... .... .... ...T .... ....
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* GPIO Output: .... .... .... .... .... ....
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* Peripheral: .... .... .... .... .... ....
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*/
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#define GPIO_SCHMITT_TRIGGER (1 << 8) /* Bit 8: Enable Input Schmitt trigger */
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/* This identifies the GPIO port:
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*
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* MODE BITFIELDS
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* ------------ -----------------------------
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* 2222 1111 1111 1100 0000 0000
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* 3210 9876 5432 1098 7654 3210
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* ------------ -----------------------------
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* GPIO Input: .... .... .... .... .PP. ....
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* GPIO Output: .... .... .... .... .PP. ....
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* Peripheral: .... .... .... .... .PP. ....
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*/
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#define GPIO_PORT_SHIFT (5) /* Bit 5-6: Port number */
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#define GPIO_PORT_MASK (3 << GPIO_PORT_SHIFT)
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# define GPIO_PORTA (0 << GPIO_PORT_SHIFT)
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# define GPIO_PORTB (1 << GPIO_PORT_SHIFT)
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# define GPIO_PORTC (2 << GPIO_PORT_SHIFT)
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/* This identifies the bit in the port:
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*
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* MODE BITFIELDS
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* ------------ -----------------------------
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* 2222 1111 1111 1100 0000 0000
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* 3210 9876 5432 1098 7654 3210
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* ------------ -----------------------------
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* GPIO Input: .... .... .... .... ...B BBBB
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* GPIO Output: .... .... .... .... ...B BBBB
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* Peripheral: .... .... .... .... ...B BBBB
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*/
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#define GPIO_PIN_SHIFT 0 /* Bits 0-4: GPIO number: 0-31 */
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#define GPIO_PIN_MASK (31 << GPIO_PIN_SHIFT)
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#define GPIO_PIN0 (0 << GPIO_PIN_SHIFT)
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#define GPIO_PIN1 (1 << GPIO_PIN_SHIFT)
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#define GPIO_PIN2 (2 << GPIO_PIN_SHIFT)
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#define GPIO_PIN3 (3 << GPIO_PIN_SHIFT)
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#define GPIO_PIN4 (4 << GPIO_PIN_SHIFT)
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#define GPIO_PIN5 (5 << GPIO_PIN_SHIFT)
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#define GPIO_PIN6 (6 << GPIO_PIN_SHIFT)
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#define GPIO_PIN7 (7 << GPIO_PIN_SHIFT)
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#define GPIO_PIN8 (8 << GPIO_PIN_SHIFT)
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#define GPIO_PIN9 (9 << GPIO_PIN_SHIFT)
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#define GPIO_PIN10 (10 << GPIO_PIN_SHIFT)
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#define GPIO_PIN11 (11 << GPIO_PIN_SHIFT)
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#define GPIO_PIN12 (12 << GPIO_PIN_SHIFT)
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#define GPIO_PIN13 (13 << GPIO_PIN_SHIFT)
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#define GPIO_PIN14 (14 << GPIO_PIN_SHIFT)
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#define GPIO_PIN15 (15 << GPIO_PIN_SHIFT)
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#define GPIO_PIN16 (16 << GPIO_PIN_SHIFT)
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#define GPIO_PIN17 (17 << GPIO_PIN_SHIFT)
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#define GPIO_PIN18 (18 << GPIO_PIN_SHIFT)
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#define GPIO_PIN19 (19 << GPIO_PIN_SHIFT)
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#define GPIO_PIN20 (20 << GPIO_PIN_SHIFT)
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#define GPIO_PIN21 (21 << GPIO_PIN_SHIFT)
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#define GPIO_PIN22 (22 << GPIO_PIN_SHIFT)
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#define GPIO_PIN23 (23 << GPIO_PIN_SHIFT)
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#define GPIO_PIN24 (24 << GPIO_PIN_SHIFT)
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#define GPIO_PIN25 (25 << GPIO_PIN_SHIFT)
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#define GPIO_PIN26 (26 << GPIO_PIN_SHIFT)
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#define GPIO_PIN27 (27 << GPIO_PIN_SHIFT)
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#define GPIO_PIN28 (28 << GPIO_PIN_SHIFT)
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#define GPIO_PIN29 (29 << GPIO_PIN_SHIFT)
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#define GPIO_PIN30 (30 << GPIO_PIN_SHIFT)
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#define GPIO_PIN31 (31 << GPIO_PIN_SHIFT)
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/************************************************************************************
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* Public Types
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************************************************************************************/
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/* Must be big enough to hold the 24-bit encoding */
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typedef uint32_t gpio_pinset_t;
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/************************************************************************************
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* Inline Functions
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************************************************************************************/
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#ifndef __ASSEMBLY__
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/************************************************************************************
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* Public Data
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************************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/************************************************************************************
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* Public Function Prototypes
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************************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_SRC_SAM34_SAM4L_GPIO_H */
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