lpc17xx_pinsel.c
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r16 | /********************************************************************** | ||
* $Id$ lpc17xx_pinsel.c 2010-05-21 | ||||
*//** | ||||
* @file lpc17xx_pinsel.c | ||||
* @brief Contains all functions support for Pin connect block firmware | ||||
* library on LPC17xx | ||||
* @version 2.0 | ||||
* @date 21. May. 2010 | ||||
* @author NXP MCU SW Application Team | ||||
* | ||||
* Copyright(C) 2010, NXP Semiconductor | ||||
* All rights reserved. | ||||
* | ||||
*********************************************************************** | ||||
* Software that is described herein is for illustrative purposes only | ||||
* which provides customers with programming information regarding the | ||||
* products. This software is supplied "AS IS" without any warranties. | ||||
* NXP Semiconductors assumes no responsibility or liability for the | ||||
* use of the software, conveys no license or title under any patent, | ||||
* copyright, or mask work right to the product. NXP Semiconductors | ||||
* reserves the right to make changes in the software without | ||||
* notification. NXP Semiconductors also make no representation or | ||||
* warranty that such application will be suitable for the specified | ||||
* use without further testing or modification. | ||||
**********************************************************************/ | ||||
/* Peripheral group ----------------------------------------------------------- */ | ||||
/** @addtogroup PINSEL | ||||
* @{ | ||||
*/ | ||||
/* Includes ------------------------------------------------------------------- */ | ||||
#include "lpc17xx_pinsel.h" | ||||
/* Public Functions ----------------------------------------------------------- */ | ||||
static void set_PinFunc ( uint8_t portnum, uint8_t pinnum, uint8_t funcnum); | ||||
static void set_ResistorMode ( uint8_t portnum, uint8_t pinnum, uint8_t modenum); | ||||
static void set_OpenDrainMode( uint8_t portnum, uint8_t pinnum, uint8_t modenum); | ||||
/*********************************************************************//** | ||||
* @brief Setup the pin selection function | ||||
* @param[in] portnum PORT number, | ||||
* should be one of the following: | ||||
* - PINSEL_PORT_0 : Port 0 | ||||
* - PINSEL_PORT_1 : Port 1 | ||||
* - PINSEL_PORT_2 : Port 2 | ||||
* - PINSEL_PORT_3 : Port 3 | ||||
* | ||||
* @param[in] pinnum Pin number, | ||||
* should be one of the following: | ||||
- PINSEL_PIN_0 : Pin 0 | ||||
- PINSEL_PIN_1 : Pin 1 | ||||
- PINSEL_PIN_2 : Pin 2 | ||||
- PINSEL_PIN_3 : Pin 3 | ||||
- PINSEL_PIN_4 : Pin 4 | ||||
- PINSEL_PIN_5 : Pin 5 | ||||
- PINSEL_PIN_6 : Pin 6 | ||||
- PINSEL_PIN_7 : Pin 7 | ||||
- PINSEL_PIN_8 : Pin 8 | ||||
- PINSEL_PIN_9 : Pin 9 | ||||
- PINSEL_PIN_10 : Pin 10 | ||||
- PINSEL_PIN_11 : Pin 11 | ||||
- PINSEL_PIN_12 : Pin 12 | ||||
- PINSEL_PIN_13 : Pin 13 | ||||
- PINSEL_PIN_14 : Pin 14 | ||||
- PINSEL_PIN_15 : Pin 15 | ||||
- PINSEL_PIN_16 : Pin 16 | ||||
- PINSEL_PIN_17 : Pin 17 | ||||
- PINSEL_PIN_18 : Pin 18 | ||||
- PINSEL_PIN_19 : Pin 19 | ||||
- PINSEL_PIN_20 : Pin 20 | ||||
- PINSEL_PIN_21 : Pin 21 | ||||
- PINSEL_PIN_22 : Pin 22 | ||||
- PINSEL_PIN_23 : Pin 23 | ||||
- PINSEL_PIN_24 : Pin 24 | ||||
- PINSEL_PIN_25 : Pin 25 | ||||
- PINSEL_PIN_26 : Pin 26 | ||||
- PINSEL_PIN_27 : Pin 27 | ||||
- PINSEL_PIN_28 : Pin 28 | ||||
- PINSEL_PIN_29 : Pin 29 | ||||
- PINSEL_PIN_30 : Pin 30 | ||||
- PINSEL_PIN_31 : Pin 31 | ||||
* @param[in] funcnum Function number, | ||||
* should be one of the following: | ||||
* - PINSEL_FUNC_0 : default function | ||||
* - PINSEL_FUNC_1 : first alternate function | ||||
* - PINSEL_FUNC_2 : second alternate function | ||||
* - PINSEL_FUNC_3 : third alternate function | ||||
* | ||||
* @return None | ||||
**********************************************************************/ | ||||
static void set_PinFunc ( uint8_t portnum, uint8_t pinnum, uint8_t funcnum) | ||||
{ | ||||
uint32_t pinnum_t = pinnum; | ||||
uint32_t pinselreg_idx = 2 * portnum; | ||||
uint32_t *pPinCon = (uint32_t *)&LPC_PINCON->PINSEL0; | ||||
if (pinnum_t >= 16) { | ||||
pinnum_t -= 16; | ||||
pinselreg_idx++; | ||||
} | ||||
*(uint32_t *)(pPinCon + pinselreg_idx) &= ~(0x03UL << (pinnum_t * 2)); | ||||
*(uint32_t *)(pPinCon + pinselreg_idx) |= ((uint32_t)funcnum) << (pinnum_t * 2); | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Setup resistor mode for each pin | ||||
* @param[in] portnum PORT number, | ||||
* should be one of the following: | ||||
* - PINSEL_PORT_0 : Port 0 | ||||
* - PINSEL_PORT_1 : Port 1 | ||||
* - PINSEL_PORT_2 : Port 2 | ||||
* - PINSEL_PORT_3 : Port 3 | ||||
* @param[in] pinnum Pin number, | ||||
* should be one of the following: | ||||
- PINSEL_PIN_0 : Pin 0 | ||||
- PINSEL_PIN_1 : Pin 1 | ||||
- PINSEL_PIN_2 : Pin 2 | ||||
- PINSEL_PIN_3 : Pin 3 | ||||
- PINSEL_PIN_4 : Pin 4 | ||||
- PINSEL_PIN_5 : Pin 5 | ||||
- PINSEL_PIN_6 : Pin 6 | ||||
- PINSEL_PIN_7 : Pin 7 | ||||
- PINSEL_PIN_8 : Pin 8 | ||||
- PINSEL_PIN_9 : Pin 9 | ||||
- PINSEL_PIN_10 : Pin 10 | ||||
- PINSEL_PIN_11 : Pin 11 | ||||
- PINSEL_PIN_12 : Pin 12 | ||||
- PINSEL_PIN_13 : Pin 13 | ||||
- PINSEL_PIN_14 : Pin 14 | ||||
- PINSEL_PIN_15 : Pin 15 | ||||
- PINSEL_PIN_16 : Pin 16 | ||||
- PINSEL_PIN_17 : Pin 17 | ||||
- PINSEL_PIN_18 : Pin 18 | ||||
- PINSEL_PIN_19 : Pin 19 | ||||
- PINSEL_PIN_20 : Pin 20 | ||||
- PINSEL_PIN_21 : Pin 21 | ||||
- PINSEL_PIN_22 : Pin 22 | ||||
- PINSEL_PIN_23 : Pin 23 | ||||
- PINSEL_PIN_24 : Pin 24 | ||||
- PINSEL_PIN_25 : Pin 25 | ||||
- PINSEL_PIN_26 : Pin 26 | ||||
- PINSEL_PIN_27 : Pin 27 | ||||
- PINSEL_PIN_28 : Pin 28 | ||||
- PINSEL_PIN_29 : Pin 29 | ||||
- PINSEL_PIN_30 : Pin 30 | ||||
- PINSEL_PIN_31 : Pin 31 | ||||
* @param[in] modenum: Mode number, | ||||
* should be one of the following: | ||||
- PINSEL_PINMODE_PULLUP : Internal pull-up resistor | ||||
- PINSEL_PINMODE_TRISTATE : Tri-state | ||||
- PINSEL_PINMODE_PULLDOWN : Internal pull-down resistor | ||||
* @return None | ||||
**********************************************************************/ | ||||
void set_ResistorMode ( uint8_t portnum, uint8_t pinnum, uint8_t modenum) | ||||
{ | ||||
uint32_t pinnum_t = pinnum; | ||||
uint32_t pinmodereg_idx = 2 * portnum; | ||||
uint32_t *pPinCon = (uint32_t *)&LPC_PINCON->PINMODE0; | ||||
if (pinnum_t >= 16) { | ||||
pinnum_t -= 16; | ||||
pinmodereg_idx++ ; | ||||
} | ||||
*(uint32_t *)(pPinCon + pinmodereg_idx) &= ~(0x03UL << (pinnum_t * 2)); | ||||
*(uint32_t *)(pPinCon + pinmodereg_idx) |= ((uint32_t)modenum) << (pinnum_t * 2); | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Setup Open drain mode for each pin | ||||
* @param[in] portnum PORT number, | ||||
* should be one of the following: | ||||
* - PINSEL_PORT_0 : Port 0 | ||||
* - PINSEL_PORT_1 : Port 1 | ||||
* - PINSEL_PORT_2 : Port 2 | ||||
* - PINSEL_PORT_3 : Port 3 | ||||
* | ||||
* @param[in] pinnum Pin number, | ||||
* should be one of the following: | ||||
- PINSEL_PIN_0 : Pin 0 | ||||
- PINSEL_PIN_1 : Pin 1 | ||||
- PINSEL_PIN_2 : Pin 2 | ||||
- PINSEL_PIN_3 : Pin 3 | ||||
- PINSEL_PIN_4 : Pin 4 | ||||
- PINSEL_PIN_5 : Pin 5 | ||||
- PINSEL_PIN_6 : Pin 6 | ||||
- PINSEL_PIN_7 : Pin 7 | ||||
- PINSEL_PIN_8 : Pin 8 | ||||
- PINSEL_PIN_9 : Pin 9 | ||||
- PINSEL_PIN_10 : Pin 10 | ||||
- PINSEL_PIN_11 : Pin 11 | ||||
- PINSEL_PIN_12 : Pin 12 | ||||
- PINSEL_PIN_13 : Pin 13 | ||||
- PINSEL_PIN_14 : Pin 14 | ||||
- PINSEL_PIN_15 : Pin 15 | ||||
- PINSEL_PIN_16 : Pin 16 | ||||
- PINSEL_PIN_17 : Pin 17 | ||||
- PINSEL_PIN_18 : Pin 18 | ||||
- PINSEL_PIN_19 : Pin 19 | ||||
- PINSEL_PIN_20 : Pin 20 | ||||
- PINSEL_PIN_21 : Pin 21 | ||||
- PINSEL_PIN_22 : Pin 22 | ||||
- PINSEL_PIN_23 : Pin 23 | ||||
- PINSEL_PIN_24 : Pin 24 | ||||
- PINSEL_PIN_25 : Pin 25 | ||||
- PINSEL_PIN_26 : Pin 26 | ||||
- PINSEL_PIN_27 : Pin 27 | ||||
- PINSEL_PIN_28 : Pin 28 | ||||
- PINSEL_PIN_29 : Pin 29 | ||||
- PINSEL_PIN_30 : Pin 30 | ||||
- PINSEL_PIN_31 : Pin 31 | ||||
* @param[in] modenum Open drain mode number, | ||||
* should be one of the following: | ||||
* - PINSEL_PINMODE_NORMAL : Pin is in the normal (not open drain) mode | ||||
* - PINSEL_PINMODE_OPENDRAIN : Pin is in the open drain mode | ||||
* | ||||
* @return None | ||||
**********************************************************************/ | ||||
void set_OpenDrainMode( uint8_t portnum, uint8_t pinnum, uint8_t modenum) | ||||
{ | ||||
uint32_t *pPinCon = (uint32_t *)&LPC_PINCON->PINMODE_OD0; | ||||
if (modenum == PINSEL_PINMODE_OPENDRAIN){ | ||||
*(uint32_t *)(pPinCon + portnum) |= (0x01UL << pinnum); | ||||
} else { | ||||
*(uint32_t *)(pPinCon + portnum) &= ~(0x01UL << pinnum); | ||||
} | ||||
} | ||||
/* End of Public Functions ---------------------------------------------------- */ | ||||
/* Public Functions ----------------------------------------------------------- */ | ||||
/** @addtogroup PINSEL_Public_Functions | ||||
* @{ | ||||
*/ | ||||
/*********************************************************************//** | ||||
* @brief Configure trace function | ||||
* @param[in] NewState State of the Trace function configuration, | ||||
* should be one of the following: | ||||
* - ENABLE : Enable Trace Function | ||||
* - DISABLE : Disable Trace Function | ||||
* | ||||
* @return None | ||||
**********************************************************************/ | ||||
void PINSEL_ConfigTraceFunc(FunctionalState NewState) | ||||
{ | ||||
if (NewState == ENABLE) { | ||||
LPC_PINCON->PINSEL10 |= (0x01UL << 3); | ||||
} else if (NewState == DISABLE) { | ||||
LPC_PINCON->PINSEL10 &= ~(0x01UL << 3); | ||||
} | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Setup I2C0 pins | ||||
* @param[in] i2cPinMode I2C pin mode, | ||||
* should be one of the following: | ||||
* - PINSEL_I2C_Normal_Mode : The standard drive mode | ||||
* - PINSEL_I2C_Fast_Mode : Fast Mode Plus drive mode | ||||
* | ||||
* @param[in] filterSlewRateEnable should be: | ||||
* - ENABLE: Enable filter and slew rate. | ||||
* - DISABLE: Disable filter and slew rate. | ||||
* | ||||
* @return None | ||||
**********************************************************************/ | ||||
void PINSEL_SetI2C0Pins(uint8_t i2cPinMode, FunctionalState filterSlewRateEnable) | ||||
{ | ||||
uint32_t regVal; | ||||
if (i2cPinMode == PINSEL_I2C_Fast_Mode){ | ||||
regVal = PINSEL_I2CPADCFG_SCLDRV0 | PINSEL_I2CPADCFG_SDADRV0; | ||||
} | ||||
if (filterSlewRateEnable == DISABLE){ | ||||
regVal = PINSEL_I2CPADCFG_SCLI2C0 | PINSEL_I2CPADCFG_SDAI2C0; | ||||
} | ||||
LPC_PINCON->I2CPADCFG = regVal; | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Configure Pin corresponding to specified parameters passed | ||||
* in the PinCfg | ||||
* @param[in] PinCfg Pointer to a PINSEL_CFG_Type structure | ||||
* that contains the configuration information for the | ||||
* specified pin. | ||||
* @return None | ||||
**********************************************************************/ | ||||
void PINSEL_ConfigPin(PINSEL_CFG_Type *PinCfg) | ||||
{ | ||||
set_PinFunc(PinCfg->Portnum, PinCfg->Pinnum, PinCfg->Funcnum); | ||||
set_ResistorMode(PinCfg->Portnum, PinCfg->Pinnum, PinCfg->Pinmode); | ||||
set_OpenDrainMode(PinCfg->Portnum, PinCfg->Pinnum, PinCfg->OpenDrain); | ||||
} | ||||
/** | ||||
* @} | ||||
*/ | ||||
/** | ||||
* @} | ||||
*/ | ||||
/* --------------------------------- End Of File ------------------------------ */ | ||||