PHung Tung / SRC_STM32F7

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Dependents:   WAV

targets/hal/TARGET_STM/TARGET_STM32F7/port_api.c@0:e87aa4c49e95, 2019-06-04 (annotated)

Committer:
phungductung
Date:
Tue Jun 04 21:51:46 2019 +0000
Revision:
0:e87aa4c49e95
libray

Who changed what in which revision?

UserRevisionLine numberNew contents of line
phungductung 0:e87aa4c49e95 1 /* mbed Microcontroller Library
phungductung 0:e87aa4c49e95 2 *******************************************************************************
phungductung 0:e87aa4c49e95 3 * Copyright (c) 2015, STMicroelectronics
phungductung 0:e87aa4c49e95 4 * All rights reserved.
phungductung 0:e87aa4c49e95 5 *
phungductung 0:e87aa4c49e95 6 * Redistribution and use in source and binary forms, with or without
phungductung 0:e87aa4c49e95 7 * modification, are permitted provided that the following conditions are met:
phungductung 0:e87aa4c49e95 8 *
phungductung 0:e87aa4c49e95 9 * 1. Redistributions of source code must retain the above copyright notice,
phungductung 0:e87aa4c49e95 10 * this list of conditions and the following disclaimer.
phungductung 0:e87aa4c49e95 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
phungductung 0:e87aa4c49e95 12 * this list of conditions and the following disclaimer in the documentation
phungductung 0:e87aa4c49e95 13 * and/or other materials provided with the distribution.
phungductung 0:e87aa4c49e95 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
phungductung 0:e87aa4c49e95 15 * may be used to endorse or promote products derived from this software
phungductung 0:e87aa4c49e95 16 * without specific prior written permission.
phungductung 0:e87aa4c49e95 17 *
phungductung 0:e87aa4c49e95 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
phungductung 0:e87aa4c49e95 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
phungductung 0:e87aa4c49e95 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
phungductung 0:e87aa4c49e95 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
phungductung 0:e87aa4c49e95 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
phungductung 0:e87aa4c49e95 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
phungductung 0:e87aa4c49e95 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
phungductung 0:e87aa4c49e95 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
phungductung 0:e87aa4c49e95 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
phungductung 0:e87aa4c49e95 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
phungductung 0:e87aa4c49e95 28 *******************************************************************************
phungductung 0:e87aa4c49e95 29 */
phungductung 0:e87aa4c49e95 30 #include "port_api.h"
phungductung 0:e87aa4c49e95 31 #include "pinmap.h"
phungductung 0:e87aa4c49e95 32 #include "gpio_api.h"
phungductung 0:e87aa4c49e95 33 #include "mbed_error.h"
phungductung 0:e87aa4c49e95 34
phungductung 0:e87aa4c49e95 35 #if DEVICE_PORTIN || DEVICE_PORTOUT
phungductung 0:e87aa4c49e95 36
phungductung 0:e87aa4c49e95 37 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
phungductung 0:e87aa4c49e95 38
phungductung 0:e87aa4c49e95 39 // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
phungductung 0:e87aa4c49e95 40 // low nibble = pin number
phungductung 0:e87aa4c49e95 41 PinName port_pin(PortName port, int pin_n)
phungductung 0:e87aa4c49e95 42 {
phungductung 0:e87aa4c49e95 43 return (PinName)(pin_n + (port << 4));
phungductung 0:e87aa4c49e95 44 }
phungductung 0:e87aa4c49e95 45
phungductung 0:e87aa4c49e95 46 void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
phungductung 0:e87aa4c49e95 47 {
phungductung 0:e87aa4c49e95 48 uint32_t port_index = (uint32_t)port;
phungductung 0:e87aa4c49e95 49
phungductung 0:e87aa4c49e95 50 // Enable GPIO clock
phungductung 0:e87aa4c49e95 51 uint32_t gpio_add = Set_GPIO_Clock(port_index);
phungductung 0:e87aa4c49e95 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
phungductung 0:e87aa4c49e95 53
phungductung 0:e87aa4c49e95 54 // Fill PORT object structure for future use
phungductung 0:e87aa4c49e95 55 obj->port = port;
phungductung 0:e87aa4c49e95 56 obj->mask = mask;
phungductung 0:e87aa4c49e95 57 obj->direction = dir;
phungductung 0:e87aa4c49e95 58 obj->reg_in = &gpio->IDR;
phungductung 0:e87aa4c49e95 59 obj->reg_out = &gpio->ODR;
phungductung 0:e87aa4c49e95 60
phungductung 0:e87aa4c49e95 61 port_dir(obj, dir);
phungductung 0:e87aa4c49e95 62 }
phungductung 0:e87aa4c49e95 63
phungductung 0:e87aa4c49e95 64 void port_dir(port_t *obj, PinDirection dir)
phungductung 0:e87aa4c49e95 65 {
phungductung 0:e87aa4c49e95 66 uint32_t i;
phungductung 0:e87aa4c49e95 67 obj->direction = dir;
phungductung 0:e87aa4c49e95 68 for (i = 0; i < 16; i++) { // Process all pins
phungductung 0:e87aa4c49e95 69 if (obj->mask & (1 << i)) { // If the pin is used
phungductung 0:e87aa4c49e95 70 if (dir == PIN_OUTPUT) {
phungductung 0:e87aa4c49e95 71 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
phungductung 0:e87aa4c49e95 72 } else { // PIN_INPUT
phungductung 0:e87aa4c49e95 73 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
phungductung 0:e87aa4c49e95 74 }
phungductung 0:e87aa4c49e95 75 }
phungductung 0:e87aa4c49e95 76 }
phungductung 0:e87aa4c49e95 77 }
phungductung 0:e87aa4c49e95 78
phungductung 0:e87aa4c49e95 79 void port_mode(port_t *obj, PinMode mode)
phungductung 0:e87aa4c49e95 80 {
phungductung 0:e87aa4c49e95 81 uint32_t i;
phungductung 0:e87aa4c49e95 82 for (i = 0; i < 16; i++) { // Process all pins
phungductung 0:e87aa4c49e95 83 if (obj->mask & (1 << i)) { // If the pin is used
phungductung 0:e87aa4c49e95 84 pin_mode(port_pin(obj->port, i), mode);
phungductung 0:e87aa4c49e95 85 }
phungductung 0:e87aa4c49e95 86 }
phungductung 0:e87aa4c49e95 87 }
phungductung 0:e87aa4c49e95 88
phungductung 0:e87aa4c49e95 89 void port_write(port_t *obj, int value)
phungductung 0:e87aa4c49e95 90 {
phungductung 0:e87aa4c49e95 91 *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
phungductung 0:e87aa4c49e95 92 }
phungductung 0:e87aa4c49e95 93
phungductung 0:e87aa4c49e95 94 int port_read(port_t *obj)
phungductung 0:e87aa4c49e95 95 {
phungductung 0:e87aa4c49e95 96 if (obj->direction == PIN_OUTPUT) {
phungductung 0:e87aa4c49e95 97 return (*obj->reg_out & obj->mask);
phungductung 0:e87aa4c49e95 98 } else { // PIN_INPUT
phungductung 0:e87aa4c49e95 99 return (*obj->reg_in & obj->mask);
phungductung 0:e87aa4c49e95 100 }
phungductung 0:e87aa4c49e95 101 }
phungductung 0:e87aa4c49e95 102
phungductung 0:e87aa4c49e95 103 #endif