Cortney Padua / mbed-dev

fixed drive strength

Dependents:   capstone_i2c

Fork of mbed-dev by mbed official

targets/TARGET_STM/port_api.c@163:1d4c9d0af1e9, 2017-04-11 (annotated)

Committer:
cpadua
Date:
Tue Apr 11 20:39:24 2017 +0000
Revision:
163:1d4c9d0af1e9
Parent:
160:d5399cc887bb 
fixed i2c-api.c

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 160:d5399cc887bb 1 /* mbed Microcontroller Library
<> 160:d5399cc887bb 2 *******************************************************************************
<> 160:d5399cc887bb 3 * Copyright (c) 2016, STMicroelectronics
<> 160:d5399cc887bb 4 * All rights reserved.
<> 160:d5399cc887bb 5 *
<> 160:d5399cc887bb 6 * Redistribution and use in source and binary forms, with or without
<> 160:d5399cc887bb 7 * modification, are permitted provided that the following conditions are met:
<> 160:d5399cc887bb 8 *
<> 160:d5399cc887bb 9 * 1. Redistributions of source code must retain the above copyright notice,
<> 160:d5399cc887bb 10 * this list of conditions and the following disclaimer.
<> 160:d5399cc887bb 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 160:d5399cc887bb 12 * this list of conditions and the following disclaimer in the documentation
<> 160:d5399cc887bb 13 * and/or other materials provided with the distribution.
<> 160:d5399cc887bb 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 160:d5399cc887bb 15 * may be used to endorse or promote products derived from this software
<> 160:d5399cc887bb 16 * without specific prior written permission.
<> 160:d5399cc887bb 17 *
<> 160:d5399cc887bb 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 160:d5399cc887bb 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 160:d5399cc887bb 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 160:d5399cc887bb 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 160:d5399cc887bb 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 160:d5399cc887bb 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 160:d5399cc887bb 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 160:d5399cc887bb 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 160:d5399cc887bb 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 160:d5399cc887bb 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 160:d5399cc887bb 28 *******************************************************************************
<> 160:d5399cc887bb 29 */
<> 160:d5399cc887bb 30 #include "port_api.h"
<> 160:d5399cc887bb 31 #include "pinmap.h"
<> 160:d5399cc887bb 32 #include "gpio_api.h"
<> 160:d5399cc887bb 33 #include "mbed_error.h"
<> 160:d5399cc887bb 34
<> 160:d5399cc887bb 35 #if DEVICE_PORTIN || DEVICE_PORTOUT
<> 160:d5399cc887bb 36
<> 160:d5399cc887bb 37 extern GPIO_TypeDef *Set_GPIO_Clock(uint32_t port_idx);
<> 160:d5399cc887bb 38
<> 160:d5399cc887bb 39 // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
<> 160:d5399cc887bb 40 // low nibble = pin number
<> 160:d5399cc887bb 41 PinName port_pin(PortName port, int pin_n)
<> 160:d5399cc887bb 42 {
<> 160:d5399cc887bb 43 return (PinName)(pin_n + (port << 4));
<> 160:d5399cc887bb 44 }
<> 160:d5399cc887bb 45
<> 160:d5399cc887bb 46 void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
<> 160:d5399cc887bb 47 {
<> 160:d5399cc887bb 48 uint32_t port_index = (uint32_t)port;
<> 160:d5399cc887bb 49
<> 160:d5399cc887bb 50 // Enable GPIO clock
<> 160:d5399cc887bb 51 GPIO_TypeDef *gpio = Set_GPIO_Clock(port_index);
<> 160:d5399cc887bb 52
<> 160:d5399cc887bb 53 // Fill PORT object structure for future use
<> 160:d5399cc887bb 54 obj->port = port;
<> 160:d5399cc887bb 55 obj->mask = mask;
<> 160:d5399cc887bb 56 obj->direction = dir;
<> 160:d5399cc887bb 57 obj->reg_in = &gpio->IDR;
<> 160:d5399cc887bb 58 obj->reg_out = &gpio->ODR;
<> 160:d5399cc887bb 59
<> 160:d5399cc887bb 60 port_dir(obj, dir);
<> 160:d5399cc887bb 61 }
<> 160:d5399cc887bb 62
<> 160:d5399cc887bb 63 void port_dir(port_t *obj, PinDirection dir)
<> 160:d5399cc887bb 64 {
<> 160:d5399cc887bb 65 uint32_t i;
<> 160:d5399cc887bb 66 obj->direction = dir;
<> 160:d5399cc887bb 67 for (i = 0; i < 16; i++) { // Process all pins
<> 160:d5399cc887bb 68 if (obj->mask & (1 << i)) { // If the pin is used
<> 160:d5399cc887bb 69 if (dir == PIN_OUTPUT) {
<> 160:d5399cc887bb 70 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
<> 160:d5399cc887bb 71 } else { // PIN_INPUT
<> 160:d5399cc887bb 72 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
<> 160:d5399cc887bb 73 }
<> 160:d5399cc887bb 74 }
<> 160:d5399cc887bb 75 }
<> 160:d5399cc887bb 76 }
<> 160:d5399cc887bb 77
<> 160:d5399cc887bb 78 void port_mode(port_t *obj, PinMode mode)
<> 160:d5399cc887bb 79 {
<> 160:d5399cc887bb 80 uint32_t i;
<> 160:d5399cc887bb 81 for (i = 0; i < 16; i++) { // Process all pins
<> 160:d5399cc887bb 82 if (obj->mask & (1 << i)) { // If the pin is used
<> 160:d5399cc887bb 83 pin_mode(port_pin(obj->port, i), mode);
<> 160:d5399cc887bb 84 }
<> 160:d5399cc887bb 85 }
<> 160:d5399cc887bb 86 }
<> 160:d5399cc887bb 87
<> 160:d5399cc887bb 88 void port_write(port_t *obj, int value)
<> 160:d5399cc887bb 89 {
<> 160:d5399cc887bb 90 *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
<> 160:d5399cc887bb 91 }
<> 160:d5399cc887bb 92
<> 160:d5399cc887bb 93 int port_read(port_t *obj)
<> 160:d5399cc887bb 94 {
<> 160:d5399cc887bb 95 if (obj->direction == PIN_OUTPUT) {
<> 160:d5399cc887bb 96 return (*obj->reg_out & obj->mask);
<> 160:d5399cc887bb 97 } else { // PIN_INPUT
<> 160:d5399cc887bb 98 return (*obj->reg_in & obj->mask);
<> 160:d5399cc887bb 99 }
<> 160:d5399cc887bb 100 }
<> 160:d5399cc887bb 101
<> 160:d5399cc887bb 102 #endif