mirror of https://github.com/ARMmbed/mbed-os.git
104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2016 u-blox
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* TODO: this needs testing */
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#include "port_api.h"
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#include "pinmap.h"
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#include "gpio_api.h"
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PinName port_pin(PortName port, int pin_n)
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{
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MBED_ASSERT (port < PortMaxNumber);
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(void) port;
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return (PinName)(pin_n);
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}
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void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
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{
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MBED_ASSERT (port < PortMaxNumber);
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obj->port = port;
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obj->mask = mask;
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obj->reg_dir = &GPIO_DIR;
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obj->reg_out = &GPIO_OUT;
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obj->reg_val = &GPIO_VALUE;
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obj->reg_drv = &GPIO_DRIVE;
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/* Claim the pins */
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for (uint8_t x = 0; x < NUM_PINS; x++) {
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if (mask & (1ul << x)) {
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pin_function((PinName) x, PIN_FUNCTION_GPIO);
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}
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}
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/* Set up the pins */
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port_dir(obj, dir);
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}
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void port_mode(port_t *obj, PinMode mode)
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{
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switch (mode) {
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case PullUp:
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{
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MBED_ASSERT(false); /* Not currently supported on HI2110 */
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}
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break;
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case PullDown:
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{
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GPIO_PULLEN_BITSET |= obj->mask;
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}
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break;
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case PullNone:
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{
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GPIO_PULLEN_BITCLR &= ~(obj->mask);
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}
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break;
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default:
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break;
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}
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}
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void port_dir(port_t *obj, PinDirection dir)
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{
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switch (dir) {
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case PIN_INPUT:
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{
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*(obj->reg_dir) &= ~(obj->mask);
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}
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break;
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case PIN_OUTPUT:
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{
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*(obj->reg_dir) |= obj->mask;
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/* TODO: do we need to set the drive strength? If so, how do we decide which way? */
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/* obj->reg_drv |= obj->mask; */
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}
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break;
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}
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}
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void port_write(port_t *obj, int value)
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{
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*(obj->reg_out) = value;
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}
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int port_read(port_t *obj)
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{
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return *(obj->reg_val);
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}
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