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Redesign of the LPC178x GPIO logic by Rommel Marcelo

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This commit is contained in:
Gregory Nutt 2013-04-05 07:58:30 -06:00
parent 31804030b2
commit f66e89b8cf
2 changed files with 414 additions and 74 deletions
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16
arch/arm/src/lpc17xx/chip/lpc178x_iocon.h
View File

@ -320,6 +320,8 @@
#define IOCON_ADMODE_MASK (1 << IOCON_ADMODE_SHIFT)
#define IOCON_FILTER_SHIFT (8) /* Bit 8: Type A */
#define IOCON_FILTER_MASK (1 << IOCON_FILTER_SHIFT)
#define IOCON_I2CHS_SHIFT (8)/* Bits 8: Type I */
#define IOCON_I2CHS_MASK (1 << IOCON_I2CHS_SHIFT)
#define IOCON_SLEW_SHIFT (9) /* Bit 9: Type W */
#define IOCON_SLEW_MASK (1 << IOCON_SLEW_SHIFT)
#define IOCON_HIDRIVE_SHIFT (9) /* Bit 9: Type I */
@ -344,6 +346,20 @@
#define IOCON_TYPE_I_MASK (0x00000347) /* I2C/USB P0:27-28, P5:2-3 */
#define IOCON_TYPE_W_MASK (0x000007ff) /* I2S P0:7-9 */
/* Slew rate modes */
#define IOCON_SLEWMODE_NORMAL (0 << IOCON_SLEW_SHIFT)
#define IOCON_SLEWMODE_FAST (1 << IOCON_SLEW_SHIFT)
/* I2C modes */
#define IOCON_I2CMODE_SHIFT (IOCON_I2CHS_SHIFT)
#define IOCON_I2CMODE_MASK (3 << IOCON_I2CMODE_SHIFT)
#define IOCON_I2CMODE_FAST (0 << IOCON_I2CMODE_SHIFT)
#define IOCON_I2CMODE_FASTPLUS (1 << IOCON_I2CMODE_SHIFT)/* */
#define IOCON_I2CMODE_HIOPENDRAIN (2 << IOCON_I2CMODE_SHIFT)/* */
#define IOCON_I2CMODE_OPENDRAIN (3 << IOCON_I2CMODE_SHIFT)/* */
/************************************************************************************
* Public Types
************************************************************************************/

472
arch/arm/src/lpc17xx/lpc178x_gpio.c
View File

@ -119,10 +119,10 @@ const uint32_t g_intbase[GPIO_NPORTS] =
****************************************************************************/
/****************************************************************************
* Name: lpc17_configiocon
* Name: lpc17_getioconmask
*
* Description:
* Set the LPC178x IOCON register
* Get the LPC178x IOCON register mask.
*
* Type D: FUNC, MODE, HYS, INV, SLEW, OD -
* Type A: FUNC, MODE, INV, ADMODE, FILTER, OD, DACEN -P0[12:13,23:26],P1[30:31]
@ -132,11 +132,9 @@ const uint32_t g_intbase[GPIO_NPORTS] =
*
****************************************************************************/
static int lpc17_configiocon(unsigned int port, unsigned int pin,
unsigned int value)
#if 0 /* Not used */
static uint32_t lpc17_getioconmask(unsigned int port, unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
uint32_t typemask = IOCON_TYPE_D_MASK;
/* Select the mask based on pin usage */
@ -207,13 +205,352 @@ static int lpc17_configiocon(unsigned int port, unsigned int pin,
break;
}
return typemask;
}
#endif
/****************************************************************************
* Name: lpc17_seti2cmode
*
* Description:
* Configure I2C pin drive mode. Applies to Type I pins
*
****************************************************************************/
#if 0 /* Not used */
static void lpc17_seti2cmode(unsigned int port,unsigned int pin, uint32_t value)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval |= value;
regval &= typemask;
regval &= ~IOCON_I2CMODE_MASK;
regval |= ((value << IOCON_I2CMODE_SHIFT) & IOCON_I2CMODE_MASK);
putreg32(regval, regaddr);
}
#endif
return OK;
/****************************************************************************
* Name: lpc17_setpinfunction
*
* Description:
* Select pin function.
*
****************************************************************************/
static void lpc17_setpinfunction(unsigned int port, unsigned int pin,
unsigned int value)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval &= ~IOCON_FUNC_MASK;
regval |= ((value << IOCON_FUNC_SHIFT) & IOCON_FUNC_MASK);
putreg32(regval, regaddr);
}
/****************************************************************************
* Name: lpc17_setinvertinput
*
* Description:
* Configure pin input polarity. Applies to Type D, A, I and W pins.
*
****************************************************************************/
#if 0 /* Not used */
static void lpc17_setinvertinput(unsigned int port, unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval |= IOCON_INV_MASK;
putreg32(regval, regaddr);
}
#endif
/****************************************************************************
* Name: lpc17_setslewfast
*
* Description:
* Configure pin mode slew rate drive. Applies to Type D and Type W pins
*
****************************************************************************/
static void lpc17_setslewfast(unsigned int port, unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval |= IOCON_SLEW_MASK;
putreg32(regval, regaddr);
}
/****************************************************************************
* Name: lpc17_setslewnormal
*
* Description:
* Configure pin mode slew rate drive. Applies to Type D and Type W pins
*
****************************************************************************/
static void lpc17_setslewnormal(unsigned int port, unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval &= ~IOCON_SLEW_MASK;
putreg32(regval, regaddr);
}
/****************************************************************************
* Name: lpc17_setmodedigital
*
* Description:
* Configure pin mode as analog or digital IO. Applies to Type A pins
*
****************************************************************************/
#if 0 /* Not used */
static void lpc17_setmodedigital(unsigned int port, unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval |= IOCON_ADMODE_MASK;
putreg32(regval, regaddr);
}
#endif
/****************************************************************************
* Name: lpc17_setmodeanalog
*
* Description:
* Configure pin mode as analog or digital IO. Applies to Type A pins
*
****************************************************************************/
#if 0 /* Not used */
static void lpc17_setmodeanalog(unsigned int port, unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval &= ~IOCON_ADMODE_MASK;
putreg32(regval, regaddr);
}
#endif
/****************************************************************************
* Name: lpc17_setdacenable
*
* Description:
* Configure DAC output. Applies to Type A pins P0:26 only
*
****************************************************************************/
#if 0 /* Not used */
static void lpc17_setdacenable(unsigned int port, unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval |= IOCON_DACEN_MASK;
putreg32(regval, regaddr);
}
#endif
/****************************************************************************
* Name: lpc17_setdacdisable
*
* Description:
* Configure DAC output. Applies to Type A pins P0:26 only
*
****************************************************************************/
#if 0 /* Not used */
static void lpc17_setdacdisable(unsigned int port, unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval &= ~IOCON_DACEN_MASK;
putreg32(regval, regaddr);
}
#endif
/****************************************************************************
* Name: lpc17_setfilter
*
* Description:
* Configure analog pin's glitch filter. Applies to Type A and Type W pins
*
****************************************************************************/
#if 0 /* Not used */
static void lpc17_setfilter(unsigned int port, unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval &= ~IOCON_FILTER_MASK;
putreg32(regval, regaddr);
}
#endif
/****************************************************************************
* Name: lpc17_clrfilter
*
* Description:
* Configure analog pin's glitch filter. Applies to Type A and Type W pins
*
****************************************************************************/
#if 0 /* Not used */
static void lpc17_clrfilter(unsigned int port, unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval |= IOCON_FILTER_MASK;
putreg32(regval, regaddr);
}
#endif
/****************************************************************************
* Name: lpc17_setopendrain
*
* Description:
* Configure a GPIO's opendrain mode. Applies to Type A, Type D, and
* Type W pins.
*
****************************************************************************/
static void lpc17_setopendrain(unsigned int port, unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval |= IOCON_OD_MASK;
putreg32(regval, regaddr);
}
/****************************************************************************
* Name: lpc17_clropendrain
*
* Description:
* Configure a GPIO's opendrain mode. Applies to Type A, Type D, and
* Type W pins.
*
****************************************************************************/
static void lpc17_clropendrain(unsigned int port, unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval &= ~IOCON_OD_MASK;
putreg32(regval, regaddr);
}
/****************************************************************************
* Name: lpc17_clrhysteresis
*
* Description:
* Configure a GPIO's hysteresis mode. Applies to Type D and Type W pins
* Default is enabled.
*
****************************************************************************/
#if 0 /* Not used */
static void lpc17_clrhysteresis(unsigned int port, unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval &= ~IOCON_HYS_MASK;
putreg32(regval, regaddr);
}
#endif
/****************************************************************************
* Name: lpc17_sethysteresis
*
* Description:
* Configure a GPIO's hysteresis mode. Applies to Type D and Type W pins
* Default is enabled.
*
****************************************************************************/
#if 0 /* Not used */
static void lpc17_sethysteresis(unsigned int port, unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
regval |= IOCON_HYS_MASK;
putreg32(regval, regaddr);
}
#endif
/****************************************************************************
* Name: lpc17_pullup
*
* Description:
* Clear and set the pin mode bits. Applies to Type A, Type D, and
* Type W pins.
*
****************************************************************************/
static void lpc17_setpullup(lpc17_pinset_t cfgset, unsigned int port,
unsigned int pin)
{
uint32_t regaddr;
uint32_t regval;
uint32_t pinmode;
/* Decode the request pull-up mode */
pinmode = ((cfgset & GPIO_PUMODE_MASK) >> GPIO_PUMODE_SHIFT);
/* Get the current IOCON register contents */
regaddr = LPC17_IOCON_P(port, pin);
regval = getreg32(regaddr);
/* Set the new mode bits */
regval &= ~IOCON_MODE_MASK;
regval |= (pinmode << IOCON_MODE_SHIFT);
putreg32(regval, regaddr);
}
/****************************************************************************
@ -259,11 +596,12 @@ static void lpc17_setintedge(unsigned int port, unsigned int pin,
* Name: lpc17_configinput
*
* Description:
* Configure a GPIO inpue pin based on bit-encoded description of the pin.
* Configure a GPIO input pin based on bit-encoded description of the pin.
*
****************************************************************************/
static inline int lpc17_configinput(lpc17_pinset_t cfgset, unsigned int port, unsigned int pin)
static inline int lpc17_configinput(lpc17_pinset_t cfgset, unsigned int port,
unsigned int pin)
{
uint32_t regval;
uint32_t fiobase;
@ -276,7 +614,7 @@ static inline int lpc17_configinput(lpc17_pinset_t cfgset, unsigned int port, un
/* Set as input */
regval = getreg32(fiobase + LPC17_FIO_DIR_OFFSET);
regval = getreg32(fiobase + LPC17_FIO_DIR_OFFSET);
regval &= ~pinmask;
putreg32(regval, fiobase + LPC17_FIO_DIR_OFFSET);
@ -293,7 +631,7 @@ static inline int lpc17_configinput(lpc17_pinset_t cfgset, unsigned int port, un
/* Disable any falling edge interrupts */
regval = getreg32(intbase + LPC17_GPIOINT_INTENF_OFFSET);
regval = getreg32(intbase + LPC17_GPIOINT_INTENF_OFFSET);
regval &= ~pinmask;
putreg32(regval, intbase + LPC17_GPIOINT_INTENF_OFFSET);
@ -304,36 +642,26 @@ static inline int lpc17_configinput(lpc17_pinset_t cfgset, unsigned int port, un
#endif
}
/* Set up PINSEL registers */
/* Configure the pin as a GPIO. Clear opendrain, input inversion,
* hysteris, slew. Set analog pins as digital.
*/
/* Configure as GPIO */
regval = IOCON_FUNC_GPIO;
lpc17_setpinfunction(port, pin, IOCON_FUNC_GPIO);
/* Set pull-up mode. Isolate the field from the cfgset and move it
* into the correct position in the register value.
*/
/* Set pull-up mode */
regval |= (((cfgset & GPIO_PUMODE_MASK) >> GPIO_PUMODE_SHIFT) << IOCON_MODE_SHIFT);
lpc17_setpullup(cfgset, port, pin);
/* Select input polarity */
/* Clear opendrain */
if ((cfgset & GPIO_INVERT) != 0)
{
regval |= IOCON_INV_MASK;
}
lpc17_clropendrain(port, pin);
/* Select hysteresis enable */
/* Set analog pins as digital */
//Todo
if ((cfgset & GPIO_HYSTERESIS) != 0)
{
regval |= IOCON_HYS_MASK;
}
/* Set input polarity */
//Todo
/* Set IOCON register */
lpc17_configiocon(port, pin, regval);
/* Set hysteresis mode */
//Todo
return OK;
}
@ -391,39 +719,42 @@ static inline int lpc17_configoutput(lpc17_pinset_t cfgset, unsigned int port,
regval |= (1 << pin);
putreg32(regval, fiobase + LPC17_FIO_DIR_OFFSET);
/* Configure the pin as a GPIO. Clear opendrain, input inversion,
* hysteris, slew. Set analog pins as digital.
*/
regval = IOCON_FUNC_GPIO;
/* Select open drain output */
/* Check for open drain output */
if ((cfgset & GPIO_OPEN_DRAIN) != 0)
{
regval |= IOCON_OD_MASK;
/* Set pull-up mode. This normally only applies to input pins, but does have
* meaning if the port is an open drain output.
*/
lpc17_setpullup(cfgset, port, pin);
/* Select open drain output */
lpc17_setopendrain(port, pin);
}
/* Select slew output */
/* Check for slew rate output */
if ((cfgset & GPIO_SLEW) != 0)
{
regval |= IOCON_SLEW_MASK;
/* Slew rate is normal mode at reset */
lpc17_setslewfast(port, pin);
}
else
{
/* But we still may need to set the normal mode because we may
* be reconfiguring the GPIO pin.
*/
/* Set pull-up mode. Isolate the field from the cfgset and move it
* into the correct position in the register value.
*/
regval |= (((cfgset & GPIO_PUMODE_MASK) >> GPIO_PUMODE_SHIFT) << IOCON_MODE_SHIFT);
/* Set IOCON register */
lpc17_configiocon(port, pin, regval);
lpc17_setslewnormal(port, pin);
}
/* Set the initial value of the output */
lpc17_gpiowrite(cfgset, ((cfgset & GPIO_VALUE) != GPIO_VALUE_ZERO));
return OK;
}
@ -439,8 +770,6 @@ static inline int lpc17_configoutput(lpc17_pinset_t cfgset, unsigned int port,
static int lpc17_configalternate(lpc17_pinset_t cfgset, unsigned int port,
unsigned int pin, uint32_t alt)
{
uint32_t regval;
/* First, configure the port as an input so that we have a known
* starting point and consistent behavior during the re-configuration.
*/
@ -449,32 +778,24 @@ static int lpc17_configalternate(lpc17_pinset_t cfgset, unsigned int port,
/* Select the alternate pin */
regval = (alt & IOCON_FUNC_MASK);
lpc17_setpinfunction(port, pin, alt);
/* Select analog mode */
/* Set IO mode: Analog/Digital */
//Todo
if ((cfgset & GPIO_ADMODE) != 0)
{
regval |= IOCON_ADMODE_MASK;
}
/* Set pull-up mode */
/* Set pull-up mode. Isolate the field from the cfgset and move it
* into the correct position in the register value.
*/
lpc17_setpullup(cfgset, port, pin);
regval |= (((cfgset & GPIO_PUMODE_MASK) >> GPIO_PUMODE_SHIFT) << IOCON_MODE_SHIFT);
/* Select open drain output */
/* Check for open drain output */
if ((cfgset & GPIO_OPEN_DRAIN) != 0)
{
regval |= IOCON_OD_MASK;
/* Select open drain output */
lpc17_setopendrain(port, pin);
}
/* Set IOCON register */
lpc17_configiocon(port, pin, regval);
return OK;
}
@ -494,6 +815,7 @@ int lpc17_configgpio(lpc17_pinset_t cfgset)
{
unsigned int port;
unsigned int pin;
int ret = -EINVAL;
/* Verify that this hardware supports the select GPIO port */
@ -501,7 +823,9 @@ int lpc17_configgpio(lpc17_pinset_t cfgset)
port = (cfgset & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
if (port < GPIO_NPORTS)
{
/* Get the pin number and select the port configuration register for that pin */
/* Get the pin number and select the port configuration register for
* that pin.
*/
pin = (cfgset & GPIO_PIN_MASK) >> GPIO_PIN_SHIFT;