MacroRat / MouseCode

Mouse code for the MacroRat

Dependencies:   ITG3200 QEI

mbed-dev/targets/TARGET_STM/port_api.c@18:6a4db94011d3, 2017-05-14 (annotated)

Committer:
sahilmgandhi
Date:
Sun May 14 23:18:57 2017 +0000
Revision:
18:6a4db94011d3
Publishing again

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sahilmgandhi 18:6a4db94011d3 1 /* mbed Microcontroller Library
sahilmgandhi 18:6a4db94011d3 2 *******************************************************************************
sahilmgandhi 18:6a4db94011d3 3 * Copyright (c) 2016, STMicroelectronics
sahilmgandhi 18:6a4db94011d3 4 * All rights reserved.
sahilmgandhi 18:6a4db94011d3 5 *
sahilmgandhi 18:6a4db94011d3 6 * Redistribution and use in source and binary forms, with or without
sahilmgandhi 18:6a4db94011d3 7 * modification, are permitted provided that the following conditions are met:
sahilmgandhi 18:6a4db94011d3 8 *
sahilmgandhi 18:6a4db94011d3 9 * 1. Redistributions of source code must retain the above copyright notice,
sahilmgandhi 18:6a4db94011d3 10 * this list of conditions and the following disclaimer.
sahilmgandhi 18:6a4db94011d3 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
sahilmgandhi 18:6a4db94011d3 12 * this list of conditions and the following disclaimer in the documentation
sahilmgandhi 18:6a4db94011d3 13 * and/or other materials provided with the distribution.
sahilmgandhi 18:6a4db94011d3 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
sahilmgandhi 18:6a4db94011d3 15 * may be used to endorse or promote products derived from this software
sahilmgandhi 18:6a4db94011d3 16 * without specific prior written permission.
sahilmgandhi 18:6a4db94011d3 17 *
sahilmgandhi 18:6a4db94011d3 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
sahilmgandhi 18:6a4db94011d3 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sahilmgandhi 18:6a4db94011d3 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
sahilmgandhi 18:6a4db94011d3 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
sahilmgandhi 18:6a4db94011d3 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sahilmgandhi 18:6a4db94011d3 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
sahilmgandhi 18:6a4db94011d3 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
sahilmgandhi 18:6a4db94011d3 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
sahilmgandhi 18:6a4db94011d3 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
sahilmgandhi 18:6a4db94011d3 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
sahilmgandhi 18:6a4db94011d3 28 *******************************************************************************
sahilmgandhi 18:6a4db94011d3 29 */
sahilmgandhi 18:6a4db94011d3 30 #include "port_api.h"
sahilmgandhi 18:6a4db94011d3 31 #include "pinmap.h"
sahilmgandhi 18:6a4db94011d3 32 #include "gpio_api.h"
sahilmgandhi 18:6a4db94011d3 33 #include "mbed_error.h"
sahilmgandhi 18:6a4db94011d3 34
sahilmgandhi 18:6a4db94011d3 35 #if DEVICE_PORTIN || DEVICE_PORTOUT
sahilmgandhi 18:6a4db94011d3 36
sahilmgandhi 18:6a4db94011d3 37 extern GPIO_TypeDef *Set_GPIO_Clock(uint32_t port_idx);
sahilmgandhi 18:6a4db94011d3 38
sahilmgandhi 18:6a4db94011d3 39 // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
sahilmgandhi 18:6a4db94011d3 40 // low nibble = pin number
sahilmgandhi 18:6a4db94011d3 41 PinName port_pin(PortName port, int pin_n)
sahilmgandhi 18:6a4db94011d3 42 {
sahilmgandhi 18:6a4db94011d3 43 return (PinName)(pin_n + (port << 4));
sahilmgandhi 18:6a4db94011d3 44 }
sahilmgandhi 18:6a4db94011d3 45
sahilmgandhi 18:6a4db94011d3 46 void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
sahilmgandhi 18:6a4db94011d3 47 {
sahilmgandhi 18:6a4db94011d3 48 uint32_t port_index = (uint32_t)port;
sahilmgandhi 18:6a4db94011d3 49
sahilmgandhi 18:6a4db94011d3 50 // Enable GPIO clock
sahilmgandhi 18:6a4db94011d3 51 GPIO_TypeDef *gpio = Set_GPIO_Clock(port_index);
sahilmgandhi 18:6a4db94011d3 52
sahilmgandhi 18:6a4db94011d3 53 // Fill PORT object structure for future use
sahilmgandhi 18:6a4db94011d3 54 obj->port = port;
sahilmgandhi 18:6a4db94011d3 55 obj->mask = mask;
sahilmgandhi 18:6a4db94011d3 56 obj->direction = dir;
sahilmgandhi 18:6a4db94011d3 57 obj->reg_in = &gpio->IDR;
sahilmgandhi 18:6a4db94011d3 58 obj->reg_out = &gpio->ODR;
sahilmgandhi 18:6a4db94011d3 59
sahilmgandhi 18:6a4db94011d3 60 port_dir(obj, dir);
sahilmgandhi 18:6a4db94011d3 61 }
sahilmgandhi 18:6a4db94011d3 62
sahilmgandhi 18:6a4db94011d3 63 void port_dir(port_t *obj, PinDirection dir)
sahilmgandhi 18:6a4db94011d3 64 {
sahilmgandhi 18:6a4db94011d3 65 uint32_t i;
sahilmgandhi 18:6a4db94011d3 66 obj->direction = dir;
sahilmgandhi 18:6a4db94011d3 67 for (i = 0; i < 16; i++) { // Process all pins
sahilmgandhi 18:6a4db94011d3 68 if (obj->mask & (1 << i)) { // If the pin is used
sahilmgandhi 18:6a4db94011d3 69 if (dir == PIN_OUTPUT) {
sahilmgandhi 18:6a4db94011d3 70 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
sahilmgandhi 18:6a4db94011d3 71 } else { // PIN_INPUT
sahilmgandhi 18:6a4db94011d3 72 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
sahilmgandhi 18:6a4db94011d3 73 }
sahilmgandhi 18:6a4db94011d3 74 }
sahilmgandhi 18:6a4db94011d3 75 }
sahilmgandhi 18:6a4db94011d3 76 }
sahilmgandhi 18:6a4db94011d3 77
sahilmgandhi 18:6a4db94011d3 78 void port_mode(port_t *obj, PinMode mode)
sahilmgandhi 18:6a4db94011d3 79 {
sahilmgandhi 18:6a4db94011d3 80 uint32_t i;
sahilmgandhi 18:6a4db94011d3 81 for (i = 0; i < 16; i++) { // Process all pins
sahilmgandhi 18:6a4db94011d3 82 if (obj->mask & (1 << i)) { // If the pin is used
sahilmgandhi 18:6a4db94011d3 83 pin_mode(port_pin(obj->port, i), mode);
sahilmgandhi 18:6a4db94011d3 84 }
sahilmgandhi 18:6a4db94011d3 85 }
sahilmgandhi 18:6a4db94011d3 86 }
sahilmgandhi 18:6a4db94011d3 87
sahilmgandhi 18:6a4db94011d3 88 void port_write(port_t *obj, int value)
sahilmgandhi 18:6a4db94011d3 89 {
sahilmgandhi 18:6a4db94011d3 90 *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
sahilmgandhi 18:6a4db94011d3 91 }
sahilmgandhi 18:6a4db94011d3 92
sahilmgandhi 18:6a4db94011d3 93 int port_read(port_t *obj)
sahilmgandhi 18:6a4db94011d3 94 {
sahilmgandhi 18:6a4db94011d3 95 if (obj->direction == PIN_OUTPUT) {
sahilmgandhi 18:6a4db94011d3 96 return (*obj->reg_out & obj->mask);
sahilmgandhi 18:6a4db94011d3 97 } else { // PIN_INPUT
sahilmgandhi 18:6a4db94011d3 98 return (*obj->reg_in & obj->mask);
sahilmgandhi 18:6a4db94011d3 99 }
sahilmgandhi 18:6a4db94011d3 100 }
sahilmgandhi 18:6a4db94011d3 101
sahilmgandhi 18:6a4db94011d3 102 #endif