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319 lines
10 KiB
319 lines
10 KiB
8 years ago
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/**********************************************************************
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* $Id$ lpc17xx_pinsel.c 2010-05-21
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*//**
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* @file lpc17xx_pinsel.c
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* @brief Contains all functions support for Pin connect block firmware
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* library on LPC17xx
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* @version 2.0
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* @date 21. May. 2010
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* @author NXP MCU SW Application Team
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*
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* Copyright(C) 2010, NXP Semiconductor
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* All rights reserved.
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*
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***********************************************************************
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* products. This software is supplied "AS IS" without any warranties.
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* NXP Semiconductors assumes no responsibility or liability for the
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* use of the software, conveys no license or title under any patent,
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* copyright, or mask work right to the product. NXP Semiconductors
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* reserves the right to make changes in the software without
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* notification. NXP Semiconductors also make no representation or
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* warranty that such application will be suitable for the specified
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* use without further testing or modification.
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, under NXP Semiconductors'
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* relevant copyright in the software, without fee, provided that it
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* is used in conjunction with NXP Semiconductors microcontrollers. This
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* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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**********************************************************************/
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/* Peripheral group ----------------------------------------------------------- */
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/** @addtogroup PINSEL
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* @{
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*/
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/* Includes ------------------------------------------------------------------- */
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#include "lpc17xx_pinsel.h"
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/* Public Functions ----------------------------------------------------------- */
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static void set_PinFunc ( uint8_t portnum, uint8_t pinnum, uint8_t funcnum);
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static void set_ResistorMode ( uint8_t portnum, uint8_t pinnum, uint8_t modenum);
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static void set_OpenDrainMode( uint8_t portnum, uint8_t pinnum, uint8_t modenum);
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/*********************************************************************//**
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* @brief Setup the pin selection function
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* @param[in] portnum PORT number,
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* should be one of the following:
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* - PINSEL_PORT_0 : Port 0
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* - PINSEL_PORT_1 : Port 1
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* - PINSEL_PORT_2 : Port 2
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* - PINSEL_PORT_3 : Port 3
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*
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* @param[in] pinnum Pin number,
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* should be one of the following:
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- PINSEL_PIN_0 : Pin 0
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- PINSEL_PIN_1 : Pin 1
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- PINSEL_PIN_2 : Pin 2
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- PINSEL_PIN_3 : Pin 3
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- PINSEL_PIN_4 : Pin 4
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- PINSEL_PIN_5 : Pin 5
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- PINSEL_PIN_6 : Pin 6
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- PINSEL_PIN_7 : Pin 7
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- PINSEL_PIN_8 : Pin 8
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- PINSEL_PIN_9 : Pin 9
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- PINSEL_PIN_10 : Pin 10
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- PINSEL_PIN_11 : Pin 11
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- PINSEL_PIN_12 : Pin 12
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- PINSEL_PIN_13 : Pin 13
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- PINSEL_PIN_14 : Pin 14
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- PINSEL_PIN_15 : Pin 15
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- PINSEL_PIN_16 : Pin 16
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- PINSEL_PIN_17 : Pin 17
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- PINSEL_PIN_18 : Pin 18
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- PINSEL_PIN_19 : Pin 19
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- PINSEL_PIN_20 : Pin 20
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- PINSEL_PIN_21 : Pin 21
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- PINSEL_PIN_22 : Pin 22
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- PINSEL_PIN_23 : Pin 23
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- PINSEL_PIN_24 : Pin 24
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- PINSEL_PIN_25 : Pin 25
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- PINSEL_PIN_26 : Pin 26
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- PINSEL_PIN_27 : Pin 27
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- PINSEL_PIN_28 : Pin 28
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- PINSEL_PIN_29 : Pin 29
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- PINSEL_PIN_30 : Pin 30
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- PINSEL_PIN_31 : Pin 31
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* @param[in] funcnum Function number,
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* should be one of the following:
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* - PINSEL_FUNC_0 : default function
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* - PINSEL_FUNC_1 : first alternate function
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* - PINSEL_FUNC_2 : second alternate function
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* - PINSEL_FUNC_3 : third alternate function
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*
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* @return None
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**********************************************************************/
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static void set_PinFunc ( uint8_t portnum, uint8_t pinnum, uint8_t funcnum)
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{
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uint32_t pinnum_t = pinnum;
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uint32_t pinselreg_idx = 2 * portnum;
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uint32_t *pPinCon = (uint32_t *)&LPC_PINCON->PINSEL0;
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if (pinnum_t >= 16) {
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pinnum_t -= 16;
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pinselreg_idx++;
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}
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*(uint32_t *)(pPinCon + pinselreg_idx) &= ~(0x03UL << (pinnum_t * 2));
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*(uint32_t *)(pPinCon + pinselreg_idx) |= ((uint32_t)funcnum) << (pinnum_t * 2);
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}
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/*********************************************************************//**
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* @brief Setup resistor mode for each pin
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* @param[in] portnum PORT number,
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* should be one of the following:
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* - PINSEL_PORT_0 : Port 0
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* - PINSEL_PORT_1 : Port 1
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* - PINSEL_PORT_2 : Port 2
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* - PINSEL_PORT_3 : Port 3
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* @param[in] pinnum Pin number,
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* should be one of the following:
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- PINSEL_PIN_0 : Pin 0
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- PINSEL_PIN_1 : Pin 1
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- PINSEL_PIN_2 : Pin 2
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- PINSEL_PIN_3 : Pin 3
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- PINSEL_PIN_4 : Pin 4
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- PINSEL_PIN_5 : Pin 5
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- PINSEL_PIN_6 : Pin 6
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- PINSEL_PIN_7 : Pin 7
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- PINSEL_PIN_8 : Pin 8
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- PINSEL_PIN_9 : Pin 9
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- PINSEL_PIN_10 : Pin 10
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- PINSEL_PIN_11 : Pin 11
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- PINSEL_PIN_12 : Pin 12
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- PINSEL_PIN_13 : Pin 13
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- PINSEL_PIN_14 : Pin 14
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- PINSEL_PIN_15 : Pin 15
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- PINSEL_PIN_16 : Pin 16
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- PINSEL_PIN_17 : Pin 17
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- PINSEL_PIN_18 : Pin 18
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- PINSEL_PIN_19 : Pin 19
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- PINSEL_PIN_20 : Pin 20
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- PINSEL_PIN_21 : Pin 21
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- PINSEL_PIN_22 : Pin 22
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- PINSEL_PIN_23 : Pin 23
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- PINSEL_PIN_24 : Pin 24
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- PINSEL_PIN_25 : Pin 25
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- PINSEL_PIN_26 : Pin 26
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- PINSEL_PIN_27 : Pin 27
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- PINSEL_PIN_28 : Pin 28
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- PINSEL_PIN_29 : Pin 29
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- PINSEL_PIN_30 : Pin 30
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- PINSEL_PIN_31 : Pin 31
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* @param[in] modenum: Mode number,
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* should be one of the following:
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- PINSEL_PINMODE_PULLUP : Internal pull-up resistor
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- PINSEL_PINMODE_TRISTATE : Tri-state
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- PINSEL_PINMODE_PULLDOWN : Internal pull-down resistor
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* @return None
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**********************************************************************/
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void set_ResistorMode ( uint8_t portnum, uint8_t pinnum, uint8_t modenum)
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{
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uint32_t pinnum_t = pinnum;
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uint32_t pinmodereg_idx = 2 * portnum;
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uint32_t *pPinCon = (uint32_t *)&LPC_PINCON->PINMODE0;
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if (pinnum_t >= 16) {
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pinnum_t -= 16;
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pinmodereg_idx++ ;
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}
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*(uint32_t *)(pPinCon + pinmodereg_idx) &= ~(0x03UL << (pinnum_t * 2));
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*(uint32_t *)(pPinCon + pinmodereg_idx) |= ((uint32_t)modenum) << (pinnum_t * 2);
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}
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/*********************************************************************//**
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* @brief Setup Open drain mode for each pin
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* @param[in] portnum PORT number,
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* should be one of the following:
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* - PINSEL_PORT_0 : Port 0
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* - PINSEL_PORT_1 : Port 1
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* - PINSEL_PORT_2 : Port 2
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* - PINSEL_PORT_3 : Port 3
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*
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* @param[in] pinnum Pin number,
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* should be one of the following:
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- PINSEL_PIN_0 : Pin 0
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- PINSEL_PIN_1 : Pin 1
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- PINSEL_PIN_2 : Pin 2
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- PINSEL_PIN_3 : Pin 3
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- PINSEL_PIN_4 : Pin 4
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- PINSEL_PIN_5 : Pin 5
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- PINSEL_PIN_6 : Pin 6
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- PINSEL_PIN_7 : Pin 7
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- PINSEL_PIN_8 : Pin 8
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- PINSEL_PIN_9 : Pin 9
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- PINSEL_PIN_10 : Pin 10
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- PINSEL_PIN_11 : Pin 11
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- PINSEL_PIN_12 : Pin 12
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- PINSEL_PIN_13 : Pin 13
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- PINSEL_PIN_14 : Pin 14
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- PINSEL_PIN_15 : Pin 15
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- PINSEL_PIN_16 : Pin 16
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- PINSEL_PIN_17 : Pin 17
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- PINSEL_PIN_18 : Pin 18
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- PINSEL_PIN_19 : Pin 19
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- PINSEL_PIN_20 : Pin 20
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- PINSEL_PIN_21 : Pin 21
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- PINSEL_PIN_22 : Pin 22
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- PINSEL_PIN_23 : Pin 23
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- PINSEL_PIN_24 : Pin 24
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- PINSEL_PIN_25 : Pin 25
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- PINSEL_PIN_26 : Pin 26
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- PINSEL_PIN_27 : Pin 27
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- PINSEL_PIN_28 : Pin 28
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- PINSEL_PIN_29 : Pin 29
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- PINSEL_PIN_30 : Pin 30
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- PINSEL_PIN_31 : Pin 31
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* @param[in] modenum Open drain mode number,
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* should be one of the following:
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* - PINSEL_PINMODE_NORMAL : Pin is in the normal (not open drain) mode
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* - PINSEL_PINMODE_OPENDRAIN : Pin is in the open drain mode
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*
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* @return None
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**********************************************************************/
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void set_OpenDrainMode( uint8_t portnum, uint8_t pinnum, uint8_t modenum)
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{
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uint32_t *pPinCon = (uint32_t *)&LPC_PINCON->PINMODE_OD0;
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if (modenum == PINSEL_PINMODE_OPENDRAIN){
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*(uint32_t *)(pPinCon + portnum) |= (0x01UL << pinnum);
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} else {
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*(uint32_t *)(pPinCon + portnum) &= ~(0x01UL << pinnum);
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}
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}
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/* End of Public Functions ---------------------------------------------------- */
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/* Public Functions ----------------------------------------------------------- */
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/** @addtogroup PINSEL_Public_Functions
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* @{
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*/
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/*********************************************************************//**
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* @brief Configure trace function
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* @param[in] NewState State of the Trace function configuration,
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* should be one of the following:
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* - ENABLE : Enable Trace Function
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* - DISABLE : Disable Trace Function
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*
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* @return None
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**********************************************************************/
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void PINSEL_ConfigTraceFunc(FunctionalState NewState)
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{
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if (NewState == ENABLE) {
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LPC_PINCON->PINSEL10 |= (0x01UL << 3);
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} else if (NewState == DISABLE) {
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LPC_PINCON->PINSEL10 &= ~(0x01UL << 3);
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}
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}
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/*********************************************************************//**
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* @brief Setup I2C0 pins
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* @param[in] i2cPinMode I2C pin mode,
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* should be one of the following:
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* - PINSEL_I2C_Normal_Mode : The standard drive mode
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* - PINSEL_I2C_Fast_Mode : Fast Mode Plus drive mode
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*
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* @param[in] filterSlewRateEnable should be:
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* - ENABLE: Enable filter and slew rate.
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* - DISABLE: Disable filter and slew rate.
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*
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* @return None
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**********************************************************************/
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void PINSEL_SetI2C0Pins(uint8_t i2cPinMode, FunctionalState filterSlewRateEnable)
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{
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uint32_t regVal;
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if (i2cPinMode == PINSEL_I2C_Fast_Mode){
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regVal = PINSEL_I2CPADCFG_SCLDRV0 | PINSEL_I2CPADCFG_SDADRV0;
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}
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if (filterSlewRateEnable == DISABLE){
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regVal = PINSEL_I2CPADCFG_SCLI2C0 | PINSEL_I2CPADCFG_SDAI2C0;
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}
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LPC_PINCON->I2CPADCFG = regVal;
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}
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/*********************************************************************//**
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* @brief Configure Pin corresponding to specified parameters passed
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* in the PinCfg
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* @param[in] PinCfg Pointer to a PINSEL_CFG_Type structure
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* that contains the configuration information for the
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* specified pin.
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* @return None
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**********************************************************************/
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void PINSEL_ConfigPin(PINSEL_CFG_Type *PinCfg)
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{
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set_PinFunc(PinCfg->Portnum, PinCfg->Pinnum, PinCfg->Funcnum);
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set_ResistorMode(PinCfg->Portnum, PinCfg->Pinnum, PinCfg->Pinmode);
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set_OpenDrainMode(PinCfg->Portnum, PinCfg->Pinnum, PinCfg->OpenDrain);
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/* --------------------------------- End Of File ------------------------------ */
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