lzbp li / mbed-stm32l0l1-src-1

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Fork of mbed-stm32l0/l1-src by lzbp li

targets/hal/TARGET_STM/TARGET_STM32L0/port_api.c@491:b97b6b70036c, 2015-03-16 (annotated)

Committer:
mbed_official
Date:
Mon Mar 16 09:45:08 2015 +0000
Revision:
491:b97b6b70036c
Parent:
targets/hal/TARGET_STM/TARGET_DISCO_L053C8/port_api.c@439:c4382fcbbaed
Child:
531:47d2b67c511f
Synchronized with git revision cc6830bf9eef1149fb6a6ebe64e20df7e6afc028



Full URL: https://github.com/mbedmicro/mbed/commit/cc6830bf9eef1149fb6a6ebe64e20df7e6afc028/



NUCLEO_L053R8/DISCO_L053C8 - hal files refactoring

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 376:cb4d9db17537 1 /* mbed Microcontroller Library
mbed_official 376:cb4d9db17537 2 *******************************************************************************
mbed_official 376:cb4d9db17537 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 376:cb4d9db17537 4 * All rights reserved.
mbed_official 376:cb4d9db17537 5 *
mbed_official 376:cb4d9db17537 6 * Redistribution and use in source and binary forms, with or without
mbed_official 376:cb4d9db17537 7 * modification, are permitted provided that the following conditions are met:
mbed_official 376:cb4d9db17537 8 *
mbed_official 376:cb4d9db17537 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 376:cb4d9db17537 10 * this list of conditions and the following disclaimer.
mbed_official 376:cb4d9db17537 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 376:cb4d9db17537 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 376:cb4d9db17537 13 * and/or other materials provided with the distribution.
mbed_official 376:cb4d9db17537 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 376:cb4d9db17537 15 * may be used to endorse or promote products derived from this software
mbed_official 376:cb4d9db17537 16 * without specific prior written permission.
mbed_official 376:cb4d9db17537 17 *
mbed_official 376:cb4d9db17537 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 376:cb4d9db17537 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 376:cb4d9db17537 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 376:cb4d9db17537 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 376:cb4d9db17537 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 376:cb4d9db17537 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 376:cb4d9db17537 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 376:cb4d9db17537 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 376:cb4d9db17537 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 376:cb4d9db17537 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 376:cb4d9db17537 28 *******************************************************************************
mbed_official 376:cb4d9db17537 29 */
mbed_official 376:cb4d9db17537 30 #include "port_api.h"
mbed_official 376:cb4d9db17537 31 #include "pinmap.h"
mbed_official 376:cb4d9db17537 32 #include "gpio_api.h"
mbed_official 376:cb4d9db17537 33 #include "mbed_error.h"
mbed_official 376:cb4d9db17537 34
mbed_official 376:cb4d9db17537 35 #if DEVICE_PORTIN || DEVICE_PORTOUT
mbed_official 376:cb4d9db17537 36
mbed_official 376:cb4d9db17537 37 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 376:cb4d9db17537 38
mbed_official 376:cb4d9db17537 39 // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
mbed_official 376:cb4d9db17537 40 // low nibble = pin number
mbed_official 439:c4382fcbbaed 41 PinName port_pin(PortName port, int pin_n)
mbed_official 439:c4382fcbbaed 42 {
mbed_official 376:cb4d9db17537 43 return (PinName)(pin_n + (port << 4));
mbed_official 376:cb4d9db17537 44 }
mbed_official 376:cb4d9db17537 45
mbed_official 439:c4382fcbbaed 46 void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
mbed_official 439:c4382fcbbaed 47 {
mbed_official 376:cb4d9db17537 48 uint32_t port_index = (uint32_t)port;
mbed_official 376:cb4d9db17537 49
mbed_official 376:cb4d9db17537 50 // Enable GPIO clock
mbed_official 376:cb4d9db17537 51 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 376:cb4d9db17537 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 376:cb4d9db17537 53
mbed_official 376:cb4d9db17537 54 // Fill PORT object structure for future use
mbed_official 376:cb4d9db17537 55 obj->port = port;
mbed_official 376:cb4d9db17537 56 obj->mask = mask;
mbed_official 376:cb4d9db17537 57 obj->direction = dir;
mbed_official 376:cb4d9db17537 58 obj->reg_in = &gpio->IDR;
mbed_official 376:cb4d9db17537 59 obj->reg_out = &gpio->ODR;
mbed_official 376:cb4d9db17537 60
mbed_official 376:cb4d9db17537 61 port_dir(obj, dir);
mbed_official 376:cb4d9db17537 62 }
mbed_official 376:cb4d9db17537 63
mbed_official 439:c4382fcbbaed 64 void port_dir(port_t *obj, PinDirection dir)
mbed_official 439:c4382fcbbaed 65 {
mbed_official 376:cb4d9db17537 66 uint32_t i;
mbed_official 376:cb4d9db17537 67 obj->direction = dir;
mbed_official 376:cb4d9db17537 68 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 376:cb4d9db17537 69 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 376:cb4d9db17537 70 if (dir == PIN_OUTPUT) {
mbed_official 376:cb4d9db17537 71 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
mbed_official 376:cb4d9db17537 72 } else { // PIN_INPUT
mbed_official 376:cb4d9db17537 73 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 376:cb4d9db17537 74 }
mbed_official 376:cb4d9db17537 75 }
mbed_official 376:cb4d9db17537 76 }
mbed_official 376:cb4d9db17537 77 }
mbed_official 376:cb4d9db17537 78
mbed_official 439:c4382fcbbaed 79 void port_mode(port_t *obj, PinMode mode)
mbed_official 439:c4382fcbbaed 80 {
mbed_official 376:cb4d9db17537 81 uint32_t i;
mbed_official 376:cb4d9db17537 82 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 376:cb4d9db17537 83 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 376:cb4d9db17537 84 pin_mode(port_pin(obj->port, i), mode);
mbed_official 376:cb4d9db17537 85 }
mbed_official 376:cb4d9db17537 86 }
mbed_official 376:cb4d9db17537 87 }
mbed_official 376:cb4d9db17537 88
mbed_official 439:c4382fcbbaed 89 void port_write(port_t *obj, int value)
mbed_official 439:c4382fcbbaed 90 {
mbed_official 376:cb4d9db17537 91 *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
mbed_official 376:cb4d9db17537 92 }
mbed_official 376:cb4d9db17537 93
mbed_official 439:c4382fcbbaed 94 int port_read(port_t *obj)
mbed_official 439:c4382fcbbaed 95 {
mbed_official 376:cb4d9db17537 96 if (obj->direction == PIN_OUTPUT) {
mbed_official 376:cb4d9db17537 97 return (*obj->reg_out & obj->mask);
mbed_official 376:cb4d9db17537 98 } else { // PIN_INPUT
mbed_official 376:cb4d9db17537 99 return (*obj->reg_in & obj->mask);
mbed_official 376:cb4d9db17537 100 }
mbed_official 376:cb4d9db17537 101 }
mbed_official 376:cb4d9db17537 102
mbed_official 376:cb4d9db17537 103 #endif