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rt-thread/bsp/nxp/lpc/lpc178x/drivers/lpc177x_8x_pinsel.c

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/**********************************************************************
* $Id$ lpc177x_8x_pinsel.c 2011-06-02
*//**
* @file lpc177x_8x_pinsel.c
* @brief Contains all functions support for Pin-connection block
* firmware library on LPC177x_8x
* @version 1.0
* @date 02. June. 2011
* @author NXP MCU SW Application Team
*
* Copyright(C) 2011, 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 "lpc177x_8x_pinsel.h"
#define PINSEL_I2C_MODE_POS (8)
#define PINSEL_I2C_MODE_NUMBITS (2)
#define PINSEL_I2C_MODE_BITMASK (0x03)
#define PINSEL_BASIC_MODE_POS (3)
#define PINSEL_BASIC_MODE_NUMBITS (2)
#define PINSEL_BASIC_MODE_BITMASK (0x03)
#define PINSEL_DACEN_POS (16)
#define PINSEL_DACEN_BITMASK (0x01)
#define PINSEL_DACEN_NUMBITS (1)
#define PINSEL_GLITCH_FILTER_POS (8)
#define PINSEL_GLITCH_FILTER_BITMASK (0x01)
#define PINSEL_GLITCH_FILTER_NUMBITS (1)
#define PINSEL_ADMODE_POS (7)
#define PINSEL_ADMODE_BITMASK (0x01)
#define PINSEL_ADMODE_NUMBITS (1)
/* Private Functions ---------------------------------------------------------- */
/*********************************************************************//**
* @brief Get pointer to GPIO peripheral due to GPIO port
* @param[in] portnum Port Number value, should be in range from 0..3.
* @param[in] pinnum Pin number value, should be in range from 0..31
* @return Pointer to GPIO peripheral
**********************************************************************/
static uint32_t * PIN_GetPointer(uint8_t portnum, uint8_t pinnum)
{
uint32_t *pPIN = NULL;
pPIN = (uint32_t *)(LPC_IOCON_BASE + ((portnum * 32 + pinnum)*sizeof(uint32_t)));
return pPIN;
}
/* Public Functions ----------------------------------------------------------- */
/** @addtogroup PINSEL_Public_Functions
* @{
*/
/*********************************************************************//**
* @brief Setup the pin selection function
* @param[in] portnum PORT number, should be in range: 0..3
* @param[in] pinnum Pin number, should be in range: 0..31
* @param[in] funcnum Function number, should be range: 0..7
* - 0: Select GPIO (Default)
* - 1: Selects the 1st alternate function
* - 2: Selects the 2nd alternate function
* ...
* - 7: Selects the 7th alternate function
* @return None
**********************************************************************/
void PINSEL_ConfigPin ( uint8_t portnum, uint8_t pinnum, uint8_t funcnum)
{
uint32_t *pPIN = NULL;
pPIN = PIN_GetPointer(portnum, pinnum);
*pPIN &= 0x00000007;//Clear function bits
*pPIN |= funcnum;
}
/*********************************************************************//**
* @brief Setup resistor mode for each pin
* @param[in] portnum PORT number, should be in range: 0..3
* @param[in] pinnum Pin number, should be in range: 0..31
* @param[in] modenum: Mode number, should be in range: 0..3
- IOCON_MODE_PLAIN: Plain output
- IOCON_MODE_PULLDOWN: Pull-down enable
- IOCON_MODE_PULLUP: Pull-up enable
- IOCON_MODE_REPEATER: Repeater mode
* @return None
**********************************************************************/
void PINSEL_SetPinMode ( uint8_t portnum, uint8_t pinnum, PinSel_BasicMode modenum)
{
uint32_t *pPIN = NULL;
pPIN = PIN_GetPointer(portnum, pinnum);
*(uint32_t *)pPIN &= ~(3<<3);//Clear function bits
*(uint32_t *)pPIN |= modenum;
}
/*********************************************************************//**
* @brief Setup hysteresis for each pin
* @param[in] portnum Port number, should be in range: 0..3
* @param[in] pinnum Pin number, should be in range: 0..31
* @param[in] NewState new state of Hysteresis mode, should be:
* - ENABLE: Hysteresis enable
* - DISABLE: Hysteresis disable
* @return None
**********************************************************************/
void PINSEL_SetHysMode(uint8_t portnum, uint8_t pinnum, FunctionalState NewState)
{
uint32_t *pPIN = NULL;
pPIN = PIN_GetPointer(portnum, pinnum);
if(NewState == DISABLE)
{
*(uint32_t *)pPIN &= ~IOCON_HYS;//Clear hys bits
}
else
*(uint32_t *)pPIN |= IOCON_HYS;
}
/*********************************************************************//**
* @brief Setup Slew rate for each pin
* @param[in] portnum Port number, should be in range: 0..3
* @param[in] pinnum Pin number, should be in range: 0..31
* @param[in] NewState new state of Slew rate control, should be:
* - ENABLE: Output slew rate control is enable
* - DISABLE: Output slew rate control is disable
* @return None
**********************************************************************/
void PINSEL_SetSlewMode(uint8_t portnum, uint8_t pinnum, FunctionalState NewState)
{
uint32_t *pPIN = NULL;
pPIN = PIN_GetPointer(portnum, pinnum);
if(NewState == DISABLE)
{
*(uint32_t *)pPIN &= ~IOCON_SLEW;//Clear hys bits
}
else
*(uint32_t *)pPIN |= IOCON_SLEW;
}
/*********************************************************************//**
* @brief Setup Input Buffer for each pin
* @param[in] portnum Port number, should be in range: 0..3
* @param[in] pinnum Pin number, should be in range: 0..31
* @param[in] NewState new state of Input buffer mode, should be:
* - ENABLE: The input buffer is enable
* - DISABLE: The input buffer is disable
* @return None
**********************************************************************/
void PINSEL_SetInBufMode(uint8_t portnum, uint8_t pinnum, FunctionalState NewState)
{
uint32_t *pPIN = NULL;
pPIN = PIN_GetPointer(portnum, pinnum);
if(NewState == DISABLE)
{
*(uint32_t *)pPIN &= ~IOCON_INBUF;//Clear hys bits
}
else
*(uint32_t *)pPIN |= IOCON_INBUF;
}
/*********************************************************************//**
* @brief Setup I2CMode for only pins that provide special I2C functionality
* @param[in] portnum Port number, should be in range: 0..3
* @param[in] pinnum Pin number, should be in range: 0..31
* @param[in] I2CMode I2C mode, should be:
* - IOCON_I2CMODE_FAST: Fast mode and standard I2C mode
* - IOCON_I2CMODE_OPENDRAIN: Open drain I/O
* - IOCON_I2CMODE_FASTPLUS: Fast Mode Plus I/O
* - IOCON_I2CMODE_HIGHOPENDRAIN: High drive open drain I/O
* @return None
**********************************************************************/
void PINSEL_SetI2CMode(uint8_t portnum, uint8_t pinnum, PinSel_I2cMode I2CMode)
{
uint32_t *pPIN = NULL;
pPIN = PIN_GetPointer(portnum, pinnum);
*(uint32_t *)pPIN &= ~(PINSEL_I2C_MODE_BITMASK<< PINSEL_I2C_MODE_POS);
*(uint32_t *)pPIN |= (I2CMode << PINSEL_I2C_MODE_POS);
}
/*********************************************************************//**
* @brief Setup Open-drain mode in each pin
* @param[in] portnum Port number, should be in range: 0..3
* @param[in] pinnum Pin number, should be in range: 0..31
* @param[in] NewState new state of Open-drain mode:
* - DISABLE: Normal pin I/O mode
* - ENABLE: Open-drain enable
* @return None
**********************************************************************/
void PINSEL_SetOpenDrainMode(uint8_t portnum, uint8_t pinnum, FunctionalState NewState)
{
uint32_t *pPIN = NULL;
pPIN = PIN_GetPointer(portnum, pinnum);
if(NewState == DISABLE)
{
*(uint32_t *)pPIN &= ~IOCON_ODMODE;//Clear hys bits
}
else
{
*(uint32_t *)pPIN |= IOCON_ODMODE;
}
}
/*********************************************************************//**
* @brief Enable the Analog mode for each pin (default is as Digital pins)
* @param[in] portnum PORT number, should be in range: 0..3
* @param[in] pinnum Pin number, should be in range: 0..31
* @param[in] enable: the state of the pin that is expected to run
- ENABLE: Enable the DAC mode of the pin
- DISABLE: Disable the DAC mode
* @return None
**********************************************************************/
void PINSEL_SetAnalogPinMode (uint8_t portnum, uint8_t pinnum, uint8_t enable)
{
uint32_t *pPIN = NULL;
uint8_t condition = 0;
condition = ((portnum == 0) && (pinnum == 12)) || ((portnum == 0) && (pinnum == 13))
| ((portnum == 0) && (pinnum <= 26) && (pinnum >= 23))
| ((portnum == 1) && (pinnum == 30)) || ((portnum == 1) && (pinnum == 31));
if(!condition)
{
return;
}
pPIN = PIN_GetPointer(portnum, pinnum);
//Clear this bit to set the pin to Analog mode
*(uint32_t *)pPIN &= ~(PINSEL_ADMODE_BITMASK << PINSEL_ADMODE_POS);
if(enable)
{
}
else
{
*(uint32_t *)pPIN |= (1 << PINSEL_ADMODE_POS);//Set 16th bit to one
}
return;
}
/*********************************************************************//**
* @brief Choose the DAC mode for each pin
* @param[in] portnum PORT number, should be in range: 0..3
* @param[in] pinnum Pin number, should be in range: 0..31
* @param[in] enable: the state of the pin that is expected to run
- ENABLE: Enable the DAC mode of the pin
- DISABLE: Disable the DAC mode
* @return None
**********************************************************************/
void PINSEL_DacEnable (uint8_t portnum, uint8_t pinnum, uint8_t enable)
{
uint32_t *pPIN = NULL;
// This setting is only for DAC pin (output pin)
if(!((portnum == 0) && (pinnum == 26)))
{
return;
}
pPIN = PIN_GetPointer(portnum, pinnum);
//Clear DAC Enable function bits
*(uint32_t *)pPIN &= ~(PINSEL_DACEN_BITMASK << PINSEL_DACEN_POS);
if(enable)
{
*(uint32_t *)pPIN |= (1 << PINSEL_DACEN_POS);//Set 16th bit to one
}
else
{
}
return;
}
/*********************************************************************//**
* @brief Control the glitch filter for each pin
* @param[in] portnum PORT number, should be in range: 0..3
* @param[in] pinnum Pin number, should be in range: 0..31
* @param[in] enable: the state of the pin that is expected to run
- ENABLE: The noise pulses below approximately 10ns are filtered out
- DISABLE: No input filtering is done.
* @return None
**********************************************************************/
void PINSEL_SetFilter (uint8_t portnum, uint8_t pinnum, uint8_t enable)
{
uint32_t *pPIN = NULL;
// This setting is only for DAC pin (output pin)
if(!((portnum == 0) && ((pinnum == 7) || (pinnum == 8) || (pinnum == 9))))
{
return;
}
pPIN = PIN_GetPointer(portnum, pinnum);
*(uint32_t *)pPIN |= (1 << 7);//Set 7th bit for normal operation following the UM1.0
//Clear Filter bits
*(uint32_t *)pPIN &= ~(PINSEL_GLITCH_FILTER_BITMASK << PINSEL_GLITCH_FILTER_POS);
if(!enable)
{
*(uint32_t *)pPIN |= (1 << PINSEL_GLITCH_FILTER_POS);//Set 8th bit to one
}
else
{
}
*pPIN = *pPIN;
return;
}
/**
* @}
*/
/**
* @}
*/
/* --------------------------------- End Of File ------------------------------ */
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