Gan likun / mbed-dev11

targets/TARGET_STM/port_api.c@0:06036f8bee2d, 2022-10-24 (annotated)

Committer:
ganlikun
Date:
Mon Oct 24 15:19:39 2022 +0000
Revision:
0:06036f8bee2d
11

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ganlikun 0:06036f8bee2d 1 /* mbed Microcontroller Library
ganlikun 0:06036f8bee2d 2 *******************************************************************************
ganlikun 0:06036f8bee2d 3 * Copyright (c) 2016, STMicroelectronics
ganlikun 0:06036f8bee2d 4 * All rights reserved.
ganlikun 0:06036f8bee2d 5 *
ganlikun 0:06036f8bee2d 6 * Redistribution and use in source and binary forms, with or without
ganlikun 0:06036f8bee2d 7 * modification, are permitted provided that the following conditions are met:
ganlikun 0:06036f8bee2d 8 *
ganlikun 0:06036f8bee2d 9 * 1. Redistributions of source code must retain the above copyright notice,
ganlikun 0:06036f8bee2d 10 * this list of conditions and the following disclaimer.
ganlikun 0:06036f8bee2d 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
ganlikun 0:06036f8bee2d 12 * this list of conditions and the following disclaimer in the documentation
ganlikun 0:06036f8bee2d 13 * and/or other materials provided with the distribution.
ganlikun 0:06036f8bee2d 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
ganlikun 0:06036f8bee2d 15 * may be used to endorse or promote products derived from this software
ganlikun 0:06036f8bee2d 16 * without specific prior written permission.
ganlikun 0:06036f8bee2d 17 *
ganlikun 0:06036f8bee2d 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
ganlikun 0:06036f8bee2d 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
ganlikun 0:06036f8bee2d 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
ganlikun 0:06036f8bee2d 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
ganlikun 0:06036f8bee2d 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
ganlikun 0:06036f8bee2d 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
ganlikun 0:06036f8bee2d 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
ganlikun 0:06036f8bee2d 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
ganlikun 0:06036f8bee2d 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
ganlikun 0:06036f8bee2d 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
ganlikun 0:06036f8bee2d 28 *******************************************************************************
ganlikun 0:06036f8bee2d 29 */
ganlikun 0:06036f8bee2d 30 #include "port_api.h"
ganlikun 0:06036f8bee2d 31 #include "pinmap.h"
ganlikun 0:06036f8bee2d 32 #include "gpio_api.h"
ganlikun 0:06036f8bee2d 33 #include "mbed_error.h"
ganlikun 0:06036f8bee2d 34
ganlikun 0:06036f8bee2d 35 #if DEVICE_PORTIN || DEVICE_PORTOUT
ganlikun 0:06036f8bee2d 36
ganlikun 0:06036f8bee2d 37 extern GPIO_TypeDef *Set_GPIO_Clock(uint32_t port_idx);
ganlikun 0:06036f8bee2d 38
ganlikun 0:06036f8bee2d 39 // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
ganlikun 0:06036f8bee2d 40 // low nibble = pin number
ganlikun 0:06036f8bee2d 41 PinName port_pin(PortName port, int pin_n)
ganlikun 0:06036f8bee2d 42 {
ganlikun 0:06036f8bee2d 43 return (PinName)(pin_n + (port << 4));
ganlikun 0:06036f8bee2d 44 }
ganlikun 0:06036f8bee2d 45
ganlikun 0:06036f8bee2d 46 void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
ganlikun 0:06036f8bee2d 47 {
ganlikun 0:06036f8bee2d 48 uint32_t port_index = (uint32_t)port;
ganlikun 0:06036f8bee2d 49
ganlikun 0:06036f8bee2d 50 // Enable GPIO clock
ganlikun 0:06036f8bee2d 51 GPIO_TypeDef *gpio = Set_GPIO_Clock(port_index);
ganlikun 0:06036f8bee2d 52
ganlikun 0:06036f8bee2d 53 // Fill PORT object structure for future use
ganlikun 0:06036f8bee2d 54 obj->port = port;
ganlikun 0:06036f8bee2d 55 obj->mask = mask;
ganlikun 0:06036f8bee2d 56 obj->direction = dir;
ganlikun 0:06036f8bee2d 57 obj->reg_in = &gpio->IDR;
ganlikun 0:06036f8bee2d 58 obj->reg_out = &gpio->ODR;
ganlikun 0:06036f8bee2d 59
ganlikun 0:06036f8bee2d 60 port_dir(obj, dir);
ganlikun 0:06036f8bee2d 61 }
ganlikun 0:06036f8bee2d 62
ganlikun 0:06036f8bee2d 63 void port_dir(port_t *obj, PinDirection dir)
ganlikun 0:06036f8bee2d 64 {
ganlikun 0:06036f8bee2d 65 uint32_t i;
ganlikun 0:06036f8bee2d 66 obj->direction = dir;
ganlikun 0:06036f8bee2d 67 for (i = 0; i < 16; i++) { // Process all pins
ganlikun 0:06036f8bee2d 68 if (obj->mask & (1 << i)) { // If the pin is used
ganlikun 0:06036f8bee2d 69 if (dir == PIN_OUTPUT) {
ganlikun 0:06036f8bee2d 70 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
ganlikun 0:06036f8bee2d 71 } else { // PIN_INPUT
ganlikun 0:06036f8bee2d 72 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
ganlikun 0:06036f8bee2d 73 }
ganlikun 0:06036f8bee2d 74 }
ganlikun 0:06036f8bee2d 75 }
ganlikun 0:06036f8bee2d 76 }
ganlikun 0:06036f8bee2d 77
ganlikun 0:06036f8bee2d 78 void port_mode(port_t *obj, PinMode mode)
ganlikun 0:06036f8bee2d 79 {
ganlikun 0:06036f8bee2d 80 uint32_t i;
ganlikun 0:06036f8bee2d 81 for (i = 0; i < 16; i++) { // Process all pins
ganlikun 0:06036f8bee2d 82 if (obj->mask & (1 << i)) { // If the pin is used
ganlikun 0:06036f8bee2d 83 pin_mode(port_pin(obj->port, i), mode);
ganlikun 0:06036f8bee2d 84 }
ganlikun 0:06036f8bee2d 85 }
ganlikun 0:06036f8bee2d 86 }
ganlikun 0:06036f8bee2d 87
ganlikun 0:06036f8bee2d 88 void port_write(port_t *obj, int value)
ganlikun 0:06036f8bee2d 89 {
ganlikun 0:06036f8bee2d 90 *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
ganlikun 0:06036f8bee2d 91 }
ganlikun 0:06036f8bee2d 92
ganlikun 0:06036f8bee2d 93 int port_read(port_t *obj)
ganlikun 0:06036f8bee2d 94 {
ganlikun 0:06036f8bee2d 95 if (obj->direction == PIN_OUTPUT) {
ganlikun 0:06036f8bee2d 96 return (*obj->reg_out & obj->mask);
ganlikun 0:06036f8bee2d 97 } else { // PIN_INPUT
ganlikun 0:06036f8bee2d 98 return (*obj->reg_in & obj->mask);
ganlikun 0:06036f8bee2d 99 }
ganlikun 0:06036f8bee2d 100 }
ganlikun 0:06036f8bee2d 101
ganlikun 0:06036f8bee2d 102 #endif
ganlikun 0:06036f8bee2d 103