mirror of https://github.com/ARMmbed/mbed-os.git
129 lines
4.0 KiB
C
129 lines
4.0 KiB
C
/*
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* Copyright (c) 2020 SparkFun Electronics
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "mbed_assert.h"
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#include "pinmap.h"
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#include "mbed_error.h"
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#include "mbed_critical.h"
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#include "extensions.h"
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#include "am_mcu_apollo.h"
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void pin_config(PinName pin, am_hal_gpio_pincfg_t pincfg)
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{
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if (pin == (PinName)NC) {
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return;
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}
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MBED_ASSERT(AM_HAL_STATUS_SUCCESS == am_hal_gpio_pinconfig(pin, pincfg));
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}
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void pinmap_config(PinName pin, const PinMap *map)
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{
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// fully configure a pin by a pin map entry
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if (pin == NC) {
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return;
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}
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am_hal_gpio_pincfg_t pincfg;
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while (map->pin != NC) {
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if (map->pin == pin) {
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pincfg = *((am_hal_gpio_pincfg_t *)(map->function));
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pin_config(pin, pincfg);
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return;
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}
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map++;
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}
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MBED_ERROR1(MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_CODE_PINMAP_INVALID), "could not pinmap_config", pin);
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}
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void pin_function(PinName pin, int function)
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{
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#define PADREG_FLD_FNSEL_S 3
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uint32_t ui32Padreg;
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uint32_t ui32Funcsel;
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MBED_ASSERT(pin < AM_HAL_GPIO_MAX_PADS);
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//
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// Initialize the PADREG accumulator variables.
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//
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ui32Padreg = 0;
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// Get the requested function
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ui32Funcsel = (uint32_t)function;
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ui32Padreg |= ui32Funcsel << PADREG_FLD_FNSEL_S;
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//
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// At this point, the configuration variable ui32Padreg,
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// values is set (at bit position 0) and ready to write
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// to its respective register bitfields.
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//
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uint32_t ui32PadregAddr;
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uint32_t ui32PadClearMask;
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uint32_t ui32PadShft;
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ui32PadregAddr = AM_REGADDR(GPIO, PADREGA) + (pin & ~0x3);
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ui32PadShft = ((pin & 0x3) << 3);
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ui32PadClearMask = ~((uint32_t)0x38 << ui32PadShft);
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// Get the new values into their rightful bit positions.
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ui32Padreg <<= ui32PadShft;
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core_util_critical_section_enter();
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GPIO->PADKEY = GPIO_PADKEY_PADKEY_Key;
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AM_REGVAL(ui32PadregAddr) = (AM_REGVAL(ui32PadregAddr) & ui32PadClearMask) | ui32Padreg;
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GPIO->PADKEY = 0;
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core_util_critical_section_exit();
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}
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//pin_mode should not be utilized by apollo3 hal, but is provided to complete the pinmap API
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//Use pinmap_config for apollo3 target insted of pinmap_pinout, this will have better hal verification of settings
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//if this function does not provide sufficient functionality, try pinmap_config or gpio_mode
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void pin_mode(PinName pin, PinMode mode)
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{
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am_hal_gpio_pincfg_t bfGpioCfg = {0};
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am_hal_gpio_pincfg_allow_t sAllowableChanges = {0};
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if (mode & (PinMode)PullNone) {
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bfGpioCfg.ePullup = AM_HAL_GPIO_PIN_PULLUP_NONE;
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sAllowableChanges.ePullup = true;
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}
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if (mode & (PinMode)PullUp) {
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bfGpioCfg.ePullup = AM_HAL_GPIO_PIN_PULLUP_WEAK;
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sAllowableChanges.ePullup = true;
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}
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if (mode & (PinMode)PullDown) {
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bfGpioCfg.ePullup = AM_HAL_GPIO_PIN_PULLDOWN;
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sAllowableChanges.ePullup = true;
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}
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ap3_hal_gpio_pinconfig_partial(pin, bfGpioCfg, sAllowableChanges);
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}
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