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/* mbed Microcontroller Library
* Copyright (c) 2006-2013 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "port_api.h"
#if DEVICE_PORTIN || DEVICE_PORTOUT
#include "pinmap.h"
#include "gpio_api.h"
PinName port_pin(PortName port, int pin_n) {
return (PinName)((port << GPIO_PORT_SHIFT) | pin_n);
}
void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
obj->port = port;
obj->mask = mask;
// The function is set per pin: reuse gpio logic
for (uint32_t i = 0; i < 32; i++) {
if (obj->mask & (1 << i)) {
gpio_set(port_pin(obj->port, i));
}
}
port_dir(obj, dir);
}
void port_mode(port_t *obj, PinMode mode) {
// The mode is set per pin: reuse pinmap logic
for (uint32_t i = 0; i < 32; i++) {
if (obj->mask & (1 << i)) {
pin_mode(port_pin(obj->port, i), mode);
}
}
}
void port_dir(port_t *obj, PinDirection dir) {
uint32_t port_addrs[] = PORT_BASE_ADDRS;
uint32_t direction = GPIO_HAL_GetPortDir(port_addrs[obj->port]);
switch (dir) {
case PIN_INPUT :
direction &= ~obj->mask;
GPIO_HAL_SetPortDir(port_addrs[obj->port], direction);
break;
case PIN_OUTPUT:
direction |= obj->mask;
GPIO_HAL_SetPortDir(port_addrs[obj->port], direction);
break;
}
}
void port_write(port_t *obj, int value) {
uint32_t port_addrs[] = PORT_BASE_ADDRS;
uint32_t input = GPIO_HAL_ReadPortInput(port_addrs[obj->port]) & ~obj->mask;
GPIO_HAL_WritePortOutput(port_addrs[obj->port], input | (uint32_t)(value & obj->mask));
}
int port_read(port_t *obj) {
uint32_t port_addrs[] = PORT_BASE_ADDRS;
return (int)(GPIO_HAL_ReadPortInput(port_addrs[obj->port]) & obj->mask);
}
#endif
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