shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F334R8/port_api.c@237:f3da66175598, 2014-06-24 (annotated)

Committer:
mbed_official
Date:
Tue Jun 24 14:45:08 2014 +0100
Revision:
237:f3da66175598
Child:
250:a49055e7a707
Synchronized with git revision 8ef659bca81f12dfc896b5a7af7c2abbd1a1b8b7



Full URL: https://github.com/mbedmicro/mbed/commit/8ef659bca81f12dfc896b5a7af7c2abbd1a1b8b7/



[NUCLEO_F334R8] Add platform files

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 237:f3da66175598 1 /* mbed Microcontroller Library
mbed_official 237:f3da66175598 2 *******************************************************************************
mbed_official 237:f3da66175598 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 237:f3da66175598 4 * All rights reserved.
mbed_official 237:f3da66175598 5 *
mbed_official 237:f3da66175598 6 * Redistribution and use in source and binary forms, with or without
mbed_official 237:f3da66175598 7 * modification, are permitted provided that the following conditions are met:
mbed_official 237:f3da66175598 8 *
mbed_official 237:f3da66175598 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 237:f3da66175598 10 * this list of conditions and the following disclaimer.
mbed_official 237:f3da66175598 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 237:f3da66175598 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 237:f3da66175598 13 * and/or other materials provided with the distribution.
mbed_official 237:f3da66175598 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 237:f3da66175598 15 * may be used to endorse or promote products derived from this software
mbed_official 237:f3da66175598 16 * without specific prior written permission.
mbed_official 237:f3da66175598 17 *
mbed_official 237:f3da66175598 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 237:f3da66175598 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 237:f3da66175598 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 237:f3da66175598 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 237:f3da66175598 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 237:f3da66175598 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 237:f3da66175598 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 237:f3da66175598 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 237:f3da66175598 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 237:f3da66175598 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 237:f3da66175598 28 *******************************************************************************
mbed_official 237:f3da66175598 29 */
mbed_official 237:f3da66175598 30 #include "port_api.h"
mbed_official 237:f3da66175598 31 #include "pinmap.h"
mbed_official 237:f3da66175598 32 #include "gpio_api.h"
mbed_official 237:f3da66175598 33 #include "error.h"
mbed_official 237:f3da66175598 34
mbed_official 237:f3da66175598 35 #if DEVICE_PORTIN || DEVICE_PORTOUT
mbed_official 237:f3da66175598 36
mbed_official 237:f3da66175598 37 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 237:f3da66175598 38
mbed_official 237:f3da66175598 39 // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
mbed_official 237:f3da66175598 40 // low nibble = pin number
mbed_official 237:f3da66175598 41 PinName port_pin(PortName port, int pin_n)
mbed_official 237:f3da66175598 42 {
mbed_official 237:f3da66175598 43 return (PinName)(pin_n + (port << 4));
mbed_official 237:f3da66175598 44 }
mbed_official 237:f3da66175598 45
mbed_official 237:f3da66175598 46 void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
mbed_official 237:f3da66175598 47 {
mbed_official 237:f3da66175598 48 uint32_t port_index = (uint32_t)port;
mbed_official 237:f3da66175598 49
mbed_official 237:f3da66175598 50 // Enable GPIO clock
mbed_official 237:f3da66175598 51 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 237:f3da66175598 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 237:f3da66175598 53
mbed_official 237:f3da66175598 54 // Fill PORT object structure for future use
mbed_official 237:f3da66175598 55 obj->port = port;
mbed_official 237:f3da66175598 56 obj->mask = mask;
mbed_official 237:f3da66175598 57 obj->direction = dir;
mbed_official 237:f3da66175598 58 obj->reg_in = &gpio->IDR;
mbed_official 237:f3da66175598 59 obj->reg_out = &gpio->ODR;
mbed_official 237:f3da66175598 60
mbed_official 237:f3da66175598 61 port_dir(obj, dir);
mbed_official 237:f3da66175598 62 }
mbed_official 237:f3da66175598 63
mbed_official 237:f3da66175598 64 void port_dir(port_t *obj, PinDirection dir)
mbed_official 237:f3da66175598 65 {
mbed_official 237:f3da66175598 66 uint32_t i;
mbed_official 237:f3da66175598 67 obj->direction = dir;
mbed_official 237:f3da66175598 68 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 237:f3da66175598 69 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 237:f3da66175598 70 if (dir == PIN_OUTPUT) {
mbed_official 237:f3da66175598 71 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
mbed_official 237:f3da66175598 72 } else { // PIN_INPUT
mbed_official 237:f3da66175598 73 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 237:f3da66175598 74 }
mbed_official 237:f3da66175598 75 }
mbed_official 237:f3da66175598 76 }
mbed_official 237:f3da66175598 77 }
mbed_official 237:f3da66175598 78
mbed_official 237:f3da66175598 79 void port_mode(port_t *obj, PinMode mode)
mbed_official 237:f3da66175598 80 {
mbed_official 237:f3da66175598 81 uint32_t i;
mbed_official 237:f3da66175598 82 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 237:f3da66175598 83 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 237:f3da66175598 84 pin_mode(port_pin(obj->port, i), mode);
mbed_official 237:f3da66175598 85 }
mbed_official 237:f3da66175598 86 }
mbed_official 237:f3da66175598 87 }
mbed_official 237:f3da66175598 88
mbed_official 237:f3da66175598 89 void port_write(port_t *obj, int value)
mbed_official 237:f3da66175598 90 {
mbed_official 237:f3da66175598 91 *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
mbed_official 237:f3da66175598 92 }
mbed_official 237:f3da66175598 93
mbed_official 237:f3da66175598 94 int port_read(port_t *obj)
mbed_official 237:f3da66175598 95 {
mbed_official 237:f3da66175598 96 if (obj->direction == PIN_OUTPUT) {
mbed_official 237:f3da66175598 97 return (*obj->reg_out & obj->mask);
mbed_official 237:f3da66175598 98 } else { // PIN_INPUT
mbed_official 237:f3da66175598 99 return (*obj->reg_in & obj->mask);
mbed_official 237:f3da66175598 100 }
mbed_official 237:f3da66175598 101 }
mbed_official 237:f3da66175598 102
mbed_official 237:f3da66175598 103 #endif