mirror of https://github.com/ARMmbed/mbed-os.git
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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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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#include "gpio_addrdefine.h"
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PinName port_pin(PortName port, int pin_n) {
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return (PinName)((port*0x10)+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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uint32_t i;
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obj->port = port;
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obj->mask = mask;
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obj->reg_dir = (volatile uint32_t *)PMSR(port);
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obj->reg_out = (volatile uint32_t *)PORT(port);
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obj->reg_in = (volatile uint32_t *)PPR(port);
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obj->reg_buf = (volatile uint32_t *)PIBC(port);
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// Do not use masking, because it prevents the use of the unmasked pins
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// port_reg->FIOMASK = ~mask;
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// The function is set per pin: reuse gpio logic
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for (i = 0; i < 32; i++) {
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if (obj->mask & (1 << i)) {
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gpio_set(port_pin(obj->port, i));
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}
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}
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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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uint32_t i;
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// The mode is set per pin: reuse pinmap logic
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for (i = 0; i < 32; 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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switch (dir) {
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case PIN_INPUT : *obj->reg_dir = (obj->mask << 16) | obj->mask;
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*obj->reg_buf |= obj->mask;
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break;
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case PIN_OUTPUT: *obj->reg_dir = (obj->mask << 16) | ~obj->mask;
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*obj->reg_buf &= ~obj->mask;
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break;
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default:
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// do nothing
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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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*obj->reg_out = (obj->mask << 16) | (value & obj->mask);
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}
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int port_read(port_t *obj) {
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return (*obj->reg_in & obj->mask);
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}
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