Thomas Lyp / DevLibMemoryController

Initial commit

Dependencies:   FastPWM

mbed-dev-master/targets/TARGET_STM/port_api.c@0:bb348c97df44, 2020-09-16 (annotated)

Committer:
lypinator
Date:
Wed Sep 16 01:11:49 2020 +0000
Revision:
0:bb348c97df44
Added PWM

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lypinator 0:bb348c97df44 1 /* mbed Microcontroller Library
lypinator 0:bb348c97df44 2 *******************************************************************************
lypinator 0:bb348c97df44 3 * Copyright (c) 2016, STMicroelectronics
lypinator 0:bb348c97df44 4 * All rights reserved.
lypinator 0:bb348c97df44 5 *
lypinator 0:bb348c97df44 6 * Redistribution and use in source and binary forms, with or without
lypinator 0:bb348c97df44 7 * modification, are permitted provided that the following conditions are met:
lypinator 0:bb348c97df44 8 *
lypinator 0:bb348c97df44 9 * 1. Redistributions of source code must retain the above copyright notice,
lypinator 0:bb348c97df44 10 * this list of conditions and the following disclaimer.
lypinator 0:bb348c97df44 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
lypinator 0:bb348c97df44 12 * this list of conditions and the following disclaimer in the documentation
lypinator 0:bb348c97df44 13 * and/or other materials provided with the distribution.
lypinator 0:bb348c97df44 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
lypinator 0:bb348c97df44 15 * may be used to endorse or promote products derived from this software
lypinator 0:bb348c97df44 16 * without specific prior written permission.
lypinator 0:bb348c97df44 17 *
lypinator 0:bb348c97df44 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
lypinator 0:bb348c97df44 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
lypinator 0:bb348c97df44 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
lypinator 0:bb348c97df44 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
lypinator 0:bb348c97df44 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
lypinator 0:bb348c97df44 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
lypinator 0:bb348c97df44 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
lypinator 0:bb348c97df44 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
lypinator 0:bb348c97df44 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
lypinator 0:bb348c97df44 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
lypinator 0:bb348c97df44 28 *******************************************************************************
lypinator 0:bb348c97df44 29 */
lypinator 0:bb348c97df44 30 #include "port_api.h"
lypinator 0:bb348c97df44 31 #include "pinmap.h"
lypinator 0:bb348c97df44 32 #include "gpio_api.h"
lypinator 0:bb348c97df44 33 #include "mbed_error.h"
lypinator 0:bb348c97df44 34
lypinator 0:bb348c97df44 35 #if DEVICE_PORTIN || DEVICE_PORTOUT
lypinator 0:bb348c97df44 36
lypinator 0:bb348c97df44 37 extern GPIO_TypeDef *Set_GPIO_Clock(uint32_t port_idx);
lypinator 0:bb348c97df44 38
lypinator 0:bb348c97df44 39 // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
lypinator 0:bb348c97df44 40 // low nibble = pin number
lypinator 0:bb348c97df44 41 PinName port_pin(PortName port, int pin_n)
lypinator 0:bb348c97df44 42 {
lypinator 0:bb348c97df44 43 return (PinName)(pin_n + (port << 4));
lypinator 0:bb348c97df44 44 }
lypinator 0:bb348c97df44 45
lypinator 0:bb348c97df44 46 void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
lypinator 0:bb348c97df44 47 {
lypinator 0:bb348c97df44 48 uint32_t port_index = (uint32_t)port;
lypinator 0:bb348c97df44 49
lypinator 0:bb348c97df44 50 // Enable GPIO clock
lypinator 0:bb348c97df44 51 GPIO_TypeDef *gpio = Set_GPIO_Clock(port_index);
lypinator 0:bb348c97df44 52
lypinator 0:bb348c97df44 53 // Fill PORT object structure for future use
lypinator 0:bb348c97df44 54 obj->port = port;
lypinator 0:bb348c97df44 55 obj->mask = mask;
lypinator 0:bb348c97df44 56 obj->direction = dir;
lypinator 0:bb348c97df44 57 obj->reg_in = &gpio->IDR;
lypinator 0:bb348c97df44 58 obj->reg_out = &gpio->ODR;
lypinator 0:bb348c97df44 59
lypinator 0:bb348c97df44 60 port_dir(obj, dir);
lypinator 0:bb348c97df44 61 }
lypinator 0:bb348c97df44 62
lypinator 0:bb348c97df44 63 void port_dir(port_t *obj, PinDirection dir)
lypinator 0:bb348c97df44 64 {
lypinator 0:bb348c97df44 65 uint32_t i;
lypinator 0:bb348c97df44 66 obj->direction = dir;
lypinator 0:bb348c97df44 67 for (i = 0; i < 16; i++) { // Process all pins
lypinator 0:bb348c97df44 68 if (obj->mask & (1 << i)) { // If the pin is used
lypinator 0:bb348c97df44 69 if (dir == PIN_OUTPUT) {
lypinator 0:bb348c97df44 70 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
lypinator 0:bb348c97df44 71 } else { // PIN_INPUT
lypinator 0:bb348c97df44 72 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
lypinator 0:bb348c97df44 73 }
lypinator 0:bb348c97df44 74 }
lypinator 0:bb348c97df44 75 }
lypinator 0:bb348c97df44 76 }
lypinator 0:bb348c97df44 77
lypinator 0:bb348c97df44 78 void port_mode(port_t *obj, PinMode mode)
lypinator 0:bb348c97df44 79 {
lypinator 0:bb348c97df44 80 uint32_t i;
lypinator 0:bb348c97df44 81 for (i = 0; i < 16; i++) { // Process all pins
lypinator 0:bb348c97df44 82 if (obj->mask & (1 << i)) { // If the pin is used
lypinator 0:bb348c97df44 83 pin_mode(port_pin(obj->port, i), mode);
lypinator 0:bb348c97df44 84 }
lypinator 0:bb348c97df44 85 }
lypinator 0:bb348c97df44 86 }
lypinator 0:bb348c97df44 87
lypinator 0:bb348c97df44 88 void port_write(port_t *obj, int value)
lypinator 0:bb348c97df44 89 {
lypinator 0:bb348c97df44 90 *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
lypinator 0:bb348c97df44 91 }
lypinator 0:bb348c97df44 92
lypinator 0:bb348c97df44 93 int port_read(port_t *obj)
lypinator 0:bb348c97df44 94 {
lypinator 0:bb348c97df44 95 if (obj->direction == PIN_OUTPUT) {
lypinator 0:bb348c97df44 96 return (*obj->reg_out & obj->mask);
lypinator 0:bb348c97df44 97 } else { // PIN_INPUT
lypinator 0:bb348c97df44 98 return (*obj->reg_in & obj->mask);
lypinator 0:bb348c97df44 99 }
lypinator 0:bb348c97df44 100 }
lypinator 0:bb348c97df44 101
lypinator 0:bb348c97df44 102 #endif