Greg Steiert / maxim-dev

Maxim mbed development library

Dependents:   MAX34417_demo MAXREFDES1265 MAXREFDES1265

Fork of mbed-dev by mbed official

targets/TARGET_STM/gpio_api.c@164:2e7515f8c45d, 2017-03-24 (annotated)

Committer:
switches
Date:
Fri Mar 24 15:15:13 2017 +0000
Revision:
164:2e7515f8c45d
Parent:
157:ff67d9f36b67 
Added low level init to clear IO registers

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 157:ff67d9f36b67 1 /* mbed Microcontroller Library
<> 157:ff67d9f36b67 2 *******************************************************************************
<> 157:ff67d9f36b67 3 * Copyright (c) 2015, STMicroelectronics
<> 157:ff67d9f36b67 4 * All rights reserved.
<> 157:ff67d9f36b67 5 *
<> 157:ff67d9f36b67 6 * Redistribution and use in source and binary forms, with or without
<> 157:ff67d9f36b67 7 * modification, are permitted provided that the following conditions are met:
<> 157:ff67d9f36b67 8 *
<> 157:ff67d9f36b67 9 * 1. Redistributions of source code must retain the above copyright notice,
<> 157:ff67d9f36b67 10 * this list of conditions and the following disclaimer.
<> 157:ff67d9f36b67 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 157:ff67d9f36b67 12 * this list of conditions and the following disclaimer in the documentation
<> 157:ff67d9f36b67 13 * and/or other materials provided with the distribution.
<> 157:ff67d9f36b67 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 157:ff67d9f36b67 15 * may be used to endorse or promote products derived from this software
<> 157:ff67d9f36b67 16 * without specific prior written permission.
<> 157:ff67d9f36b67 17 *
<> 157:ff67d9f36b67 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 157:ff67d9f36b67 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 157:ff67d9f36b67 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 157:ff67d9f36b67 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 157:ff67d9f36b67 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 157:ff67d9f36b67 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 157:ff67d9f36b67 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 157:ff67d9f36b67 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 157:ff67d9f36b67 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 157:ff67d9f36b67 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 157:ff67d9f36b67 28 *******************************************************************************
<> 157:ff67d9f36b67 29 */
<> 157:ff67d9f36b67 30 #include "mbed_assert.h"
<> 157:ff67d9f36b67 31 #include "gpio_api.h"
<> 157:ff67d9f36b67 32 #include "pinmap.h"
<> 157:ff67d9f36b67 33 #include "mbed_error.h"
<> 157:ff67d9f36b67 34
<> 157:ff67d9f36b67 35 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
<> 157:ff67d9f36b67 36
<> 157:ff67d9f36b67 37 uint32_t gpio_set(PinName pin) {
<> 157:ff67d9f36b67 38 MBED_ASSERT(pin != (PinName)NC);
<> 157:ff67d9f36b67 39
<> 157:ff67d9f36b67 40 pin_function(pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
<> 157:ff67d9f36b67 41
<> 157:ff67d9f36b67 42 return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
<> 157:ff67d9f36b67 43 }
<> 157:ff67d9f36b67 44
<> 157:ff67d9f36b67 45 void gpio_init(gpio_t *obj, PinName pin) {
<> 157:ff67d9f36b67 46 obj->pin = pin;
<> 157:ff67d9f36b67 47 if (pin == (PinName)NC) {
<> 157:ff67d9f36b67 48 return;
<> 157:ff67d9f36b67 49 }
<> 157:ff67d9f36b67 50
<> 157:ff67d9f36b67 51 uint32_t port_index = STM_PORT(pin);
<> 157:ff67d9f36b67 52
<> 157:ff67d9f36b67 53 // Enable GPIO clock
<> 157:ff67d9f36b67 54 uint32_t gpio_add = Set_GPIO_Clock(port_index);
<> 157:ff67d9f36b67 55 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
<> 157:ff67d9f36b67 56
<> 157:ff67d9f36b67 57 // Fill GPIO object structure for future use
<> 157:ff67d9f36b67 58 obj->mask = gpio_set(pin);
<> 157:ff67d9f36b67 59 obj->reg_in = &gpio->IDR;
<> 157:ff67d9f36b67 60 obj->reg_set = &gpio->BSRR;
<> 157:ff67d9f36b67 61 #ifdef GPIO_IP_WITHOUT_BRR
<> 157:ff67d9f36b67 62 obj->reg_clr = &gpio->BSRR;
<> 157:ff67d9f36b67 63 #else
<> 157:ff67d9f36b67 64 obj->reg_clr = &gpio->BRR;
<> 157:ff67d9f36b67 65 #endif
<> 157:ff67d9f36b67 66 }
<> 157:ff67d9f36b67 67
<> 157:ff67d9f36b67 68 void gpio_mode(gpio_t *obj, PinMode mode) {
<> 157:ff67d9f36b67 69 pin_mode(obj->pin, mode);
<> 157:ff67d9f36b67 70 }
<> 157:ff67d9f36b67 71
<> 157:ff67d9f36b67 72 void gpio_dir(gpio_t *obj, PinDirection direction) {
<> 157:ff67d9f36b67 73 MBED_ASSERT(obj->pin != (PinName)NC);
<> 157:ff67d9f36b67 74 if (direction == PIN_OUTPUT) {
<> 157:ff67d9f36b67 75 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
<> 157:ff67d9f36b67 76 } else { // PIN_INPUT
<> 157:ff67d9f36b67 77 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
<> 157:ff67d9f36b67 78 }
<> 157:ff67d9f36b67 79 }