mirror of https://github.com/ARMmbed/mbed-os.git
112 lines
3.7 KiB
C
112 lines
3.7 KiB
C
/* mbed Microcontroller Library
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*******************************************************************************
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* Copyright (c) 2015 WIZnet Co.,Ltd. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of ARM Limited nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*******************************************************************************
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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 "mbed_error.h"
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#if DEVICE_PORTIN || DEVICE_PORTOUT
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extern uint32_t Get_GPIO_BaseAddress(uint32_t port_idx);
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//port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
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PinName port_pin(PortName port, int pin_n)
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{
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int af_num = 0;
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if( (port == 2) && ((pin_n == 0) || (pin_n == 1) || (pin_n == 4) || (pin_n == 8) || (pin_n == 9)) )
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{
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af_num = 1;
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}
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return (PinName)(pin_n + (port << 4) + (af_num << 8));
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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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uint32_t port_num = (uint32_t)port;
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// Enable GPIO clock
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GPIO_TypeDef *gpio = (GPIO_TypeDef *)Get_GPIO_BaseAddress(port_num);
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// Fill PORT object structure for future use
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obj->port = port;
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obj->mask = mask;
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obj->direction = dir;
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obj->reg_in = &gpio->DATA;
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obj->reg_out = &gpio->DATAOUT;
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port_dir(obj, dir);
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}
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void port_dir(port_t *obj, PinDirection dir)
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{
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uint32_t i;
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obj->direction = dir;
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for (i = 0; i < 16; i++) { // Process all pins
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if (obj->mask & (1 << i)) { // If the pin is used
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if (dir == PIN_OUTPUT) {
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pin_function(port_pin(obj->port, i), WIZ_PIN_DATA(WIZ_MODE_OUTPUT, WIZ_GPIO_NOPULL, 0));
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} else { // PIN_INPUT
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pin_function(port_pin(obj->port, i), WIZ_PIN_DATA(WIZ_MODE_INPUT, WIZ_GPIO_NOPULL, 0));
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}
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}
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}
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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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for (i = 0; i < 16; i++) { // Process all pins
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if (obj->mask & (1 << i)) { // If the pin is used
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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_write(port_t *obj, int value)
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{
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*obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
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}
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int port_read(port_t *obj)
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{
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if (obj->direction == PIN_OUTPUT) {
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return (*obj->reg_out & obj->mask);
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} else { // PIN_INPUT
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return (*obj->reg_in & obj->mask);
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}
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}
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#endif
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