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nrf52_gpiote: add support for TASK mode

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This commit is contained in:
Matias N 2020-08-22 17:19:02 -03:00 committed by Mateusz Szafoni
parent 3241ebf811
commit da88467d6e
2 changed files with 125 additions and 2 deletions
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88
arch/arm/src/nrf52/nrf52_gpiote.c
View File

@ -183,7 +183,9 @@ int nrf52_gpiosetevent(uint32_t pinset, bool risingedge, bool fallingedge,
int ret = OK;
int i = 0;
int pin = 0;
#ifdef CONFIG_NRF52_HAVE_PORT1
int port = 0;
#endif
uint32_t regval = 0;
bool found = false;
irqstate_t flags;
@ -218,15 +220,18 @@ int nrf52_gpiosetevent(uint32_t pinset, bool risingedge, bool fallingedge,
/* Select GPIOTE pin */
pin = (pinset & GPIO_PIN_MASK) >> GPIO_PIN_SHIFT;
port = (pinset & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
regval = (pin << GPIOTE_CONFIG_PSEL_SHIFT);
#ifdef CONFIG_NRF52_HAVE_PORT1
port = (pinset & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
regval |= (port << GPIOTE_CONFIG_PORT_SHIFT);
#endif
/* Select EVENT mode */
if (event || func)
{
regval &= ~GPIOTE_CONFIG_MODE_MASK;
regval |= GPIOTE_CONFIG_MODE_EV;
}
@ -285,3 +290,82 @@ int nrf52_gpiote_init(void)
return OK;
}
/****************************************************************************
* Name: nrf52_gpiotaskset
*
* Description:
* Configure GPIO in TASK mode (to be controlled via tasks).
* Note that a pin can only be either in TASK or EVENT mode (set by
* nrf52_gpiosetevent with event set to true). Also, once set to TASK mode,
* pin control is only possible via tasks on the via nrf52_gpio_write and
* will automatically set the output mode.
* Finally, a given pin should only be assigned to a given channel.
*
* Input Parameters:
* - pinset: gpio pin configuration (only port + pin is important here)
* - channel: the GPIOTE channel used to control the given pin
* - output_high: set pin initially to output HIGH or LOW.
* - outcfg: configure pin behavior one OUT task is triggered
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure indicating the
* nature of the failure.
*
****************************************************************************/
int nrf52_gpiotaskset(uint32_t pinset, int channel,
bool output_high, enum nrf52_gpiote_outcfg_e outcfg)
{
uint32_t regval;
int pin;
#ifdef CONFIG_NRF52_HAVE_PORT1
int port;
#endif
/* Select GPIOTE pin */
pin = (pinset & GPIO_PIN_MASK) >> GPIO_PIN_SHIFT;
regval = (pin << GPIOTE_CONFIG_PSEL_SHIFT);
#ifdef CONFIG_NRF52_HAVE_PORT1
port = (pinset & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
regval |= (port << GPIOTE_CONFIG_PORT_SHIFT);
#endif
/* Select TASK mode */
regval |= GPIOTE_CONFIG_MODE_TS;
/* Select pin number */
regval |= (pin << GPIOTE_CONFIG_PSEL_SHIFT);
/* Select initial output */
if (output_high)
{
regval |= (1 << GPIOTE_CONFIG_OUTINIT_SHIFT);
}
/* Set polarity mode */
switch (outcfg)
{
case NRF52_GPIOTE_SET:
regval |= GPIOTE_CONFIG_POL_LTH;
break;
case NRF52_GPIOTE_CLEAR:
regval |= GPIOTE_CONFIG_POL_HTL;
break;
case NRF52_GPIOTE_TOGGLE:
regval |= GPIOTE_CONFIG_POL_TG;
break;
}
/* Write register */
nrf52_gpiote_putreg(NRF52_GPIOTE_CONFIG_OFFSET(channel), regval);
return OK;
}

39
arch/arm/src/nrf52/nrf52_gpiote.h
View File

@ -46,6 +46,19 @@
#include "chip.h"
/****************************************************************************
* Public Types
****************************************************************************/
/* GPIOTE OUT task configuration */
enum nrf52_gpiote_outcfg_e
{
NRF52_GPIOTE_SET = 0,
NRF52_GPIOTE_CLEAR = 1,
NRF52_GPIOTE_TOGGLE = 2,
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
@ -72,6 +85,32 @@
int nrf52_gpiosetevent(uint32_t pinset, bool risingedge, bool fallingedge,
bool event, xcpt_t func, FAR void *arg);
/****************************************************************************
* Name: nrf52_gpiotaskset
*
* Description:
* Configure GPIO in TASK mode (to be controlled via tasks).
* Note that a pin can only be either in TASK or EVENT mode (set by
* nrf52_gpiosetevent with event set to true). Also, once set to TASK mode,
* pin control is only possible via tasks on the via nrf52_gpio_write and
* will automatically set the output mode.
* Finally, a given pin should only be assigned to a given channel.
*
* Input Parameters:
* - pinset: gpio pin configuration (only port + pin is important here)
* - channel: the GPIOTE channel used to control the given pin
* - output_high: set pin initially to output HIGH or LOW.
* - outcfg: configure pin behavior one OUT task is triggered
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure indicating the
* nature of the failure.
*
****************************************************************************/
int nrf52_gpiotaskset(uint32_t pinset, int channel, bool output_high,
enum nrf52_gpiote_outcfg_e outcfg);
/****************************************************************************
* Name: nrf52_gpiote_init
*