117 lines
3.7 KiB
C
117 lines
3.7 KiB
C
/** @defgroup syscon_file SYSCON peripheral API
|
|
* @ingroup peripheral_apis
|
|
* @brief SWM050 SYSCON API.
|
|
* LGPL License Terms @ref lgpl_license
|
|
* @author @htmlonly © @endhtmlonly 2019
|
|
* Icenowy Zheng <icenowy@aosc.io>
|
|
* @author @htmlonly © @endhtmlonly 2019
|
|
* Caleb Szalacinski <contact@skiboy.net>
|
|
*/
|
|
/*
|
|
* This file is part of the libopencm3 project.
|
|
*
|
|
* Copyright (C) 2019 Icenowy Zheng <icenowy@aosc.io>
|
|
* Copyright (C) 2019 Caleb Szalacinski <contact@skiboy.net>
|
|
*
|
|
* This library is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/**@{*/
|
|
#include <libopencm3/swm050/syscon.h>
|
|
#include <libopencm3/swm050/gpio.h>
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Select the alternative function of a Group of Pins
|
|
|
|
Select the alternative function of one or more pins of GPIO.
|
|
|
|
@param[in] gpios Pin identifiers @ref gpio_pin_id
|
|
If multiple pins are to be changed, use bitwise OR '|' to separate
|
|
them.
|
|
@param[in] af_en Whether alternative function is selected
|
|
*/
|
|
void syscon_sel_af(uint16_t gpios, bool af_en)
|
|
{
|
|
uint32_t masked_reg32;
|
|
|
|
if (gpios & GPIO0) {
|
|
masked_reg32 = SYSCON_PORTA_SEL & (~0x3);
|
|
SYSCON_PORTA_SEL = masked_reg32 | (af_en ? 0x1 : 0x0);
|
|
}
|
|
if (gpios & GPIO1) {
|
|
masked_reg32 = SYSCON_PORTA_SEL & (~0xc);
|
|
SYSCON_PORTA_SEL = masked_reg32 | (af_en ? 0x4 : 0x0);
|
|
}
|
|
if (gpios & GPIO2) {
|
|
masked_reg32 = SYSCON_PORTA_SEL & (~0x30);
|
|
SYSCON_PORTA_SEL = masked_reg32 | (af_en ? 0x10 : 0x0);
|
|
}
|
|
if (gpios & GPIO7) {
|
|
masked_reg32 = SYSCON_PORTA_SEL & (~0xc000);
|
|
SYSCON_PORTA_SEL = masked_reg32 | (af_en ? 0x4000 : 0x0);
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Enable the internal pull-up of a Group of Pins
|
|
|
|
Enable or disable the internal pull-up of one or more pins of GPIO.
|
|
|
|
@param[in] gpios Pin identifiers @ref gpio_pin_id
|
|
If multiple pins are to be changed, use bitwise OR '|' to separate
|
|
them.
|
|
@param[in] en True to enable pull-up, false to disable.
|
|
*/
|
|
void syscon_pullup(uint16_t gpios, bool en)
|
|
{
|
|
if (en) {
|
|
SYSCON_PORTA_PULLUP |= gpios;
|
|
} else {
|
|
SYSCON_PORTA_PULLUP &= ~gpios;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Enable the input function of a Group of Pins
|
|
|
|
Enable or disable the input function of one or more pins of GPIO. Disabling
|
|
the input function of pins decreases the power usage of the MCU.
|
|
|
|
@param[in] gpios Pin identifiers @ref gpio_pin_id
|
|
If multiple pins are to be changed, use bitwise OR '|' to separate
|
|
them.
|
|
@param[in] en True to enable input function.
|
|
*/
|
|
void syscon_input_enable(uint16_t gpios, bool en)
|
|
{
|
|
if (en) {
|
|
SYSCON_PORTA_INEN &= ~gpios;
|
|
} else {
|
|
SYSCON_PORTA_INEN |= gpios;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Select the SWD function of GPIO 1/2
|
|
|
|
Enable or disable the SWD debugging port at GPIO 1/2. When SWD debugging port
|
|
is enabled, GPIO and AF of the SWD pins will be both unavailable.
|
|
|
|
@param[in] en True to enable SWD.
|
|
*/
|
|
void syscon_sel_swd(bool en)
|
|
{
|
|
SYSCON_SWD_SEL = en;
|
|
}
|
|
/**@}*/
|