mirror of https://github.com/ARMmbed/mbed-os.git
85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2013 Nordic Semiconductor
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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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#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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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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obj->port = port;
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obj->mask = mask;
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obj->reg_out = &NRF_GPIO->OUT;
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obj->reg_in = &NRF_GPIO->IN;
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obj->reg_cnf = NRF_GPIO->PIN_CNF;
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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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uint32_t i;
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// The mode is set per pin: reuse pinmap logic
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for (i = 0; i<31; i++) {
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if (obj->mask & (1 << i)) {
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pin_mode(port_pin(obj->port, i), mode);
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}
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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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int i;
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switch (dir) {
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case PIN_INPUT:
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for (i = 0; i<31; i++) {
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if (obj->mask & (1 << i)) {
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obj->reg_cnf[i] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
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| (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
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| (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
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| (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
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}
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}
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break;
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case PIN_OUTPUT:
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for (i = 0; i<31; i++) {
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if (obj->mask & (1 << i)) {
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obj->reg_cnf[i] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
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| (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
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| (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
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| (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
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| (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
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}
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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_in);
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}
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