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https://github.com/taubel/sdk-ameba-v4.0b-gcc.git
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137 lines
4.4 KiB
C
137 lines
4.4 KiB
C
/** mbed Microcontroller Library
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******************************************************************************
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* @file port_api.c
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* @author
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* @version V1.0.0
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* @date 2016-08-01
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* @brief This file provides mbed API for GPIO PORT.
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******************************************************************************
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* @attention
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*
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* This module is a confidential and proprietary property of RealTek and
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* possession or use of this module requires written permission of RealTek.
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*
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* Copyright(c) 2016, Realtek Semiconductor Corporation. All rights reserved.
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******************************************************************************
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*/
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#include "objects.h"
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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 "PinNames.h"
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//#include "mbed_error.h"
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#define GPIO_PORT_NUM 2
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/**
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* @brief Get GPIO port pin name
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* @param port: PortName according to pinmux spec, this parameter can be one of the following values:
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* @arg PortA: port number is A, has 32 pins
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* @arg PortB: port number is B, has 7 pins
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* @param pin_n: pin number.
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* @note pin_n must be set to a value in the 0~31 range when PortA
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* @note pin_n must be set to a value in the 0~6 range when PortB
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* @retval none
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*/
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PinName port_pin(PortName port, int pin_n)
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{
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return (PinName)(port << 5 | pin_n);
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}
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/**
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* @brief Initializes the GPIO device port, include data direction registers.
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* @param obj: gpio port object define in application software.
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* @param port: PortName according to pinmux spec, this parameter can be one of the following values:
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* @arg PortA: port A, has 32 pins
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* @arg PortB: port B, has 7 pins
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* @param mask: One bit one gpio pin, select one or multiple pins of the specified port.
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* @param dir: gpio port direction, this parameter can be one of the following values:
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* @arg PIN_INPUT: port pins are input
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* @arg PIN_OUTPUT: port pins are output
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* @retval none
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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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u32 i;
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RCC_PeriphClockCmd(APBPeriph_GPIO, APBPeriph_GPIO_CLOCK, ENABLE);
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assert_param(port < GPIO_PORT_NUM);
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obj->port = port;
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obj->mask = mask;
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port_dir(obj, dir);
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}
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/**
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* @brief Set GPIO port pins data direction.
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* @param obj: gpio port object define in application software.
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* @param dir: this parameter can be one of the following values:
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* @arg PIN_INPUT: port pins are input
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* @arg PIN_OUTPUT: port pins are output
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* @retval none
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*/
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void port_dir(port_t *obj, PinDirection dir)
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{
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if (dir == PIN_OUTPUT) {
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GPIO_PortDirection(obj->port, obj->mask, GPIO_Mode_OUT);
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} else {
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GPIO_PortDirection(obj->port, obj->mask, GPIO_Mode_IN);
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}
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}
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/**
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* @brief Configure GPIO port pins pull up/pull down.
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* @param obj: gpio port object define in application software.
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* @param mode: this parameter can be one of the following values:
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* @arg PullNone: HighZ
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* @arg OpenDrain(is OpenDrain output): no pull + OUT + GPIO[gpio_bit] = 0
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* @arg PullDown: pull down
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* @arg PullUp: pull up
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* @retval none
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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 pin_idx;
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uint32_t max_num = 0;
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if (obj->port == PORT_A) {
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max_num = 32;
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} else {
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max_num = 7;
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}
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for (pin_idx = 0; pin_idx < max_num; pin_idx++) {
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if (obj->mask & BIT(pin_idx)) {
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/* PinName = (obj->port << 5 | pin_idx) */
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pin_mode((obj->port << 5 | pin_idx), mode);
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}
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}
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}
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/**
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* @brief Sets value to the selected port pins.
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* @param obj: gpio port object define in application software.
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* @param value: One bit one gpio pin, set value to one or multiple pins of the specified port.
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* @note corresponding bit is 1, pin state set to high; corresponding bit is 0, pin state set to low
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* @retval none
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*/
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void port_write(port_t *obj, int value)
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{
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GPIO_PortWrite(obj->port, obj->mask, value);
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}
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/**
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* @brief Reads the specified gpio port pins.
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* @param obj: gpio port object define in application software.
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* @retval state of the specified gpio port pins
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* @note corresponding bit is 1, pin state is high; corresponding bit is 0, pin state is low
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*/
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int port_read(port_t *obj)
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{
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u32 value = GPIO_PortRead(obj->port, obj->mask);
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return value;
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}
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/******************* (C) COPYRIGHT 2016 Realtek Semiconductor *****END OF FILE****/
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