More updates to the LPC17x/18x GPIO driver from Rommel Marcelo
This commit is contained in:
Gregory Nutt
parent
52a0d9a0e5
commit
9bed2a5906
87
arch/arm/src/lpc17xx/lpc178x_gpio.c
Normal file → Executable file
87
arch/arm/src/lpc17xx/lpc178x_gpio.c
Normal file → Executable file
@ -217,7 +217,6 @@ static uint32_t lpc17_getioconmask(unsigned int port, unsigned int pin)
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*
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****************************************************************************/
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#if 0 /* Not used */
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static void lpc17_seti2cmode(unsigned int port,unsigned int pin, uint32_t value)
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{
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uint32_t regaddr;
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@ -229,7 +228,6 @@ static void lpc17_seti2cmode(unsigned int port,unsigned int pin, uint32_t value)
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regval |= ((value << IOCON_I2CMODE_SHIFT) & IOCON_I2CMODE_MASK);
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putreg32(regval, regaddr);
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}
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#endif
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/****************************************************************************
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* Name: lpc17_setpinfunction
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@ -247,6 +245,7 @@ static void lpc17_setpinfunction(unsigned int port, unsigned int pin,
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regaddr = LPC17_IOCON_P(port, pin);
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regval = getreg32(regaddr);
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regval &= ~IOCON_FUNC_MASK;
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regval |= ((value << IOCON_FUNC_SHIFT) & IOCON_FUNC_MASK);
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putreg32(regval, regaddr);
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@ -260,7 +259,6 @@ static void lpc17_setpinfunction(unsigned int port, unsigned int pin,
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*
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****************************************************************************/
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#if 0 /* Not used */
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static void lpc17_setinvertinput(unsigned int port, unsigned int pin)
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{
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uint32_t regaddr;
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@ -271,7 +269,6 @@ static void lpc17_setinvertinput(unsigned int port, unsigned int pin)
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regval |= IOCON_INV_MASK;
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putreg32(regval, regaddr);
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}
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#endif
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/****************************************************************************
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* Name: lpc17_setslewfast
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@ -340,7 +337,6 @@ static void lpc17_setmodedigital(unsigned int port, unsigned int pin)
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*
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****************************************************************************/
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#if 0 /* Not used */
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static void lpc17_setmodeanalog(unsigned int port, unsigned int pin)
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{
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uint32_t regaddr;
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@ -351,7 +347,6 @@ static void lpc17_setmodeanalog(unsigned int port, unsigned int pin)
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regval &= ~IOCON_ADMODE_MASK;
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putreg32(regval, regaddr);
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}
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#endif
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/****************************************************************************
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* Name: lpc17_setdacenable
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@ -361,7 +356,6 @@ static void lpc17_setmodeanalog(unsigned int port, unsigned int pin)
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*
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****************************************************************************/
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#if 0 /* Not used */
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static void lpc17_setdacenable(unsigned int port, unsigned int pin)
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{
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uint32_t regaddr;
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@ -372,7 +366,6 @@ static void lpc17_setdacenable(unsigned int port, unsigned int pin)
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regval |= IOCON_DACEN_MASK;
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putreg32(regval, regaddr);
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}
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#endif
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/****************************************************************************
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* Name: lpc17_setdacdisable
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@ -403,7 +396,6 @@ static void lpc17_setdacdisable(unsigned int port, unsigned int pin)
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*
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****************************************************************************/
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#if 0 /* Not used */
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static void lpc17_setfilter(unsigned int port, unsigned int pin)
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{
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uint32_t regaddr;
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@ -414,7 +406,6 @@ static void lpc17_setfilter(unsigned int port, unsigned int pin)
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regval &= ~IOCON_FILTER_MASK;
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putreg32(regval, regaddr);
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}
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#endif
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/****************************************************************************
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* Name: lpc17_clrfilter
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@ -508,7 +499,6 @@ static void lpc17_clrhysteresis(unsigned int port, unsigned int pin)
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*
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****************************************************************************/
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#if 0 /* Not used */
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static void lpc17_sethysteresis(unsigned int port, unsigned int pin)
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{
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uint32_t regaddr;
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@ -519,7 +509,6 @@ static void lpc17_sethysteresis(unsigned int port, unsigned int pin)
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regval |= IOCON_HYS_MASK;
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putreg32(regval, regaddr);
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}
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#endif
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/****************************************************************************
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* Name: lpc17_pullup
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@ -642,10 +631,6 @@ static inline int lpc17_configinput(lpc17_pinset_t cfgset, unsigned int port,
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#endif
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}
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/* Configure as GPIO */
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lpc17_setpinfunction(port, pin, IOCON_FUNC_GPIO);
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/* Set pull-up mode */
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lpc17_setpullup(cfgset, port, pin);
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@ -654,14 +639,32 @@ static inline int lpc17_configinput(lpc17_pinset_t cfgset, unsigned int port,
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lpc17_clropendrain(port, pin);
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/* Set analog pins as digital */
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//Todo
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/* Set input polarity */
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//Todo
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/* Set hysteresis mode */
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//Todo
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if ((cfgset & GPIO_INVERT) != 0)
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{
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lpc17_setinvertinput(port, pin);
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}
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/* Set hysteresis */
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if ((cfgset & GPIO_HYSTERESIS) != 0)
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{
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lpc17_sethysteresis(port, pin);
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}
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/* Set filtering */
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if ((cfgset & GPIO_FILTER) != 0)
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{
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/* Slew rate is normal mode at reset */
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lpc17_setfilter(port, pin);
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}
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/* Configure as GPIO */
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lpc17_setpinfunction(port, pin, IOCON_FUNC_GPIO);
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return OK;
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}
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@ -770,23 +773,45 @@ static inline int lpc17_configoutput(lpc17_pinset_t cfgset, unsigned int port,
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static int lpc17_configalternate(lpc17_pinset_t cfgset, unsigned int port,
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unsigned int pin, uint32_t alt)
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{
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uint32_t i2cmode;
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/* First, configure the port as an input so that we have a known
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* starting point and consistent behavior during the re-configuration.
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*/
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(void)lpc17_configinput(DEFAULT_INPUT, port, pin);
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/* Select the alternate pin */
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lpc17_setpinfunction(port, pin, alt);
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/* Set IO mode: Analog/Digital */
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//Todo
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/* Set pull-up mode */
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lpc17_setpullup(cfgset, port, pin);
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/* Check for analog mode */
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if ((cfgset & GPIO_ADMODE) != 0)
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{
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lpc17_setmodeanalog(port, pin);
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/* Check for DAC output enable */
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if ((cfgset & GPIO_DACEN) != 0)
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{
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lpc17_setdacenable(port, pin);
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}
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}
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/* Check for I2C modes */
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if ((cfgset & (GPIO_I2CHS | GPIO_HIDRIVE)) != 0)
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{
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/* WARNING: Using literal values (14) is a maintenance problem */
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i2cmode = ((cfgset & (GPIO_I2CHS | GPIO_HIDRIVE)) >> 14);
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/* Set I2C Modes */
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lpc17_seti2cmode(port, pin, i2cmode);
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}
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/* Check for open drain output */
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if ((cfgset & GPIO_OPEN_DRAIN) != 0)
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@ -796,6 +821,10 @@ static int lpc17_configalternate(lpc17_pinset_t cfgset, unsigned int port,
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lpc17_setopendrain(port, pin);
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}
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/* Select the alternate pin */
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lpc17_setpinfunction(port, pin, alt);
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return OK;
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}
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