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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/gpio_api.c@627:4fa1328d9c60, 2015-09-25 (annotated)

Committer:
mbed_official
Date:
Fri Sep 25 14:15:10 2015 +0100
Revision:
627:4fa1328d9c60
Parent:
593:78ee8643776a 
Synchronized with git revision fe238a91ab7a4d1d72c4cab9da04967c619d54ad



Full URL: https://github.com/mbedmicro/mbed/commit/fe238a91ab7a4d1d72c4cab9da04967c619d54ad/



Silicon Labs - Add support for low-power async Serial

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 627:4fa1328d9c60 1 /***************************************************************************//**
mbed_official 627:4fa1328d9c60 2 * @file gpio_api.c
mbed_official 627:4fa1328d9c60 3 *******************************************************************************
mbed_official 627:4fa1328d9c60 4 * @section License
mbed_official 627:4fa1328d9c60 5 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
mbed_official 627:4fa1328d9c60 6 *******************************************************************************
mbed_official 525:c320967f86b9 7 *
mbed_official 627:4fa1328d9c60 8 * Permission is granted to anyone to use this software for any purpose,
mbed_official 627:4fa1328d9c60 9 * including commercial applications, and to alter it and redistribute it
mbed_official 627:4fa1328d9c60 10 * freely, subject to the following restrictions:
mbed_official 525:c320967f86b9 11 *
mbed_official 627:4fa1328d9c60 12 * 1. The origin of this software must not be misrepresented; you must not
mbed_official 627:4fa1328d9c60 13 * claim that you wrote the original software.
mbed_official 627:4fa1328d9c60 14 * 2. Altered source versions must be plainly marked as such, and must not be
mbed_official 627:4fa1328d9c60 15 * misrepresented as being the original software.
mbed_official 627:4fa1328d9c60 16 * 3. This notice may not be removed or altered from any source distribution.
mbed_official 525:c320967f86b9 17 *
mbed_official 627:4fa1328d9c60 18 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
mbed_official 627:4fa1328d9c60 19 * obligation to support this Software. Silicon Labs is providing the
mbed_official 627:4fa1328d9c60 20 * Software "AS IS", with no express or implied warranties of any kind,
mbed_official 627:4fa1328d9c60 21 * including, but not limited to, any implied warranties of merchantability
mbed_official 627:4fa1328d9c60 22 * or fitness for any particular purpose or warranties against infringement
mbed_official 627:4fa1328d9c60 23 * of any proprietary rights of a third party.
mbed_official 627:4fa1328d9c60 24 *
mbed_official 627:4fa1328d9c60 25 * Silicon Labs will not be liable for any consequential, incidental, or
mbed_official 627:4fa1328d9c60 26 * special damages, or any other relief, or for any claim by any third party,
mbed_official 627:4fa1328d9c60 27 * arising from your use of this Software.
mbed_official 627:4fa1328d9c60 28 *
mbed_official 627:4fa1328d9c60 29 ******************************************************************************/
mbed_official 627:4fa1328d9c60 30
mbed_official 525:c320967f86b9 31 #include "gpio_api.h"
mbed_official 525:c320967f86b9 32 #include "pinmap.h"
mbed_official 525:c320967f86b9 33 #include "em_cmu.h"
mbed_official 525:c320967f86b9 34 #include "mbed_assert.h"
mbed_official 526:7c4bdfe6a168 35 #include "sleepmodes.h"
mbed_official 525:c320967f86b9 36
mbed_official 593:78ee8643776a 37
mbed_official 593:78ee8643776a 38 void gpio_write(gpio_t *obj, int value)
mbed_official 525:c320967f86b9 39 {
mbed_official 593:78ee8643776a 40 if (value) {
mbed_official 593:78ee8643776a 41 GPIO_PinOutSet((GPIO_Port_TypeDef)(obj->pin >> 4 & 0xF), obj->pin & 0xF); // Pin number encoded in first four bits of obj->pin
mbed_official 593:78ee8643776a 42 } else {
mbed_official 593:78ee8643776a 43 GPIO_PinOutClear((GPIO_Port_TypeDef)(obj->pin >> 4 & 0xF), obj->pin & 0xF);
mbed_official 593:78ee8643776a 44 }
mbed_official 593:78ee8643776a 45 }
mbed_official 593:78ee8643776a 46
mbed_official 593:78ee8643776a 47 int gpio_read(gpio_t *obj)
mbed_official 593:78ee8643776a 48 {
mbed_official 593:78ee8643776a 49 if (obj->dir == PIN_INPUT) {
mbed_official 593:78ee8643776a 50 return GPIO_PinInGet((GPIO_Port_TypeDef)(obj->pin >> 4 & 0xF), obj->pin & 0xF); // Pin number encoded in first four bits of obj->pin
mbed_official 593:78ee8643776a 51 } else {
mbed_official 593:78ee8643776a 52 return GPIO_PinOutGet((GPIO_Port_TypeDef)(obj->pin >> 4 & 0xF), obj->pin & 0xF);
mbed_official 593:78ee8643776a 53 }
mbed_official 593:78ee8643776a 54 }
mbed_official 593:78ee8643776a 55
mbed_official 593:78ee8643776a 56 int gpio_is_connected(const gpio_t *obj)
mbed_official 593:78ee8643776a 57 {
mbed_official 593:78ee8643776a 58 return (obj->pin | 0xFFFFFF00 )!= (PinName)NC;
mbed_official 525:c320967f86b9 59 }
mbed_official 525:c320967f86b9 60
mbed_official 525:c320967f86b9 61 /*
mbed_official 525:c320967f86b9 62 * @return the GPIO port mask for this pin
mbed_official 525:c320967f86b9 63 * Pin and port index encoded in one uint32.
mbed_official 525:c320967f86b9 64 * First four bits represent the pin number
mbed_official 525:c320967f86b9 65 * The remaining bits represent the pin mode
mbed_official 525:c320967f86b9 66 */
mbed_official 525:c320967f86b9 67 uint32_t gpio_set(PinName pin)
mbed_official 525:c320967f86b9 68 {
mbed_official 525:c320967f86b9 69 return 1 << ((uint32_t) pin & 0xF);
mbed_official 525:c320967f86b9 70 }
mbed_official 525:c320967f86b9 71
mbed_official 525:c320967f86b9 72 void gpio_init(gpio_t *obj, PinName pin)
mbed_official 525:c320967f86b9 73 {
mbed_official 525:c320967f86b9 74 MBED_ASSERT(pin != NC);
mbed_official 525:c320967f86b9 75
mbed_official 525:c320967f86b9 76 CMU_ClockEnable(cmuClock_HFPER, true);
mbed_official 525:c320967f86b9 77 CMU_ClockEnable(cmuClock_GPIO, true);
mbed_official 525:c320967f86b9 78 obj->pin = pin;
mbed_official 525:c320967f86b9 79 }
mbed_official 525:c320967f86b9 80
mbed_official 525:c320967f86b9 81 void gpio_mode(gpio_t *obj, PinMode mode)
mbed_official 525:c320967f86b9 82 {
mbed_official 593:78ee8643776a 83 if(obj->dir == PIN_INPUT) {
mbed_official 593:78ee8643776a 84 switch(mode) {
mbed_official 593:78ee8643776a 85 case PullDefault:
mbed_official 593:78ee8643776a 86 mode = Input;
mbed_official 593:78ee8643776a 87 break;
mbed_official 593:78ee8643776a 88 case PullUp:
mbed_official 593:78ee8643776a 89 mode = InputPullUp;
mbed_official 593:78ee8643776a 90 break;
mbed_official 593:78ee8643776a 91 case PullDown:
mbed_official 593:78ee8643776a 92 mode = InputPullDown;
mbed_official 593:78ee8643776a 93 break;
mbed_official 593:78ee8643776a 94 default:
mbed_official 593:78ee8643776a 95 break;
mbed_official 593:78ee8643776a 96 }
mbed_official 593:78ee8643776a 97
mbed_official 593:78ee8643776a 98 //Handle DOUT setting
mbed_official 593:78ee8643776a 99 if((mode & 0x10) != 0) {
mbed_official 593:78ee8643776a 100 //Set DOUT
mbed_official 593:78ee8643776a 101 GPIO->P[(obj->pin >> 4) & 0xF].DOUTSET = 1 << (obj->pin & 0xF);
mbed_official 593:78ee8643776a 102 } else {
mbed_official 593:78ee8643776a 103 //Clear DOUT
mbed_official 593:78ee8643776a 104 GPIO->P[(obj->pin >> 4) & 0xF].DOUTCLR = 1 << (obj->pin & 0xF);
mbed_official 593:78ee8643776a 105 }
mbed_official 593:78ee8643776a 106 } else {
mbed_official 593:78ee8643776a 107 switch(mode) {
mbed_official 593:78ee8643776a 108 case PullDefault:
mbed_official 593:78ee8643776a 109 mode = PushPull;
mbed_official 593:78ee8643776a 110 break;
mbed_official 593:78ee8643776a 111 case PullUp:
mbed_official 593:78ee8643776a 112 mode = WiredAndPullUp;
mbed_official 593:78ee8643776a 113 break;
mbed_official 593:78ee8643776a 114 case PullDown:
mbed_official 593:78ee8643776a 115 mode = WiredOrPullDown;
mbed_official 593:78ee8643776a 116 break;
mbed_official 593:78ee8643776a 117 default:
mbed_official 593:78ee8643776a 118 break;
mbed_official 593:78ee8643776a 119 }
mbed_official 593:78ee8643776a 120 }
mbed_official 593:78ee8643776a 121
mbed_official 525:c320967f86b9 122 obj->mode = mode; // Update object
mbed_official 525:c320967f86b9 123 pin_mode(obj->pin, mode); // Update register
mbed_official 525:c320967f86b9 124 }
mbed_official 525:c320967f86b9 125
mbed_official 525:c320967f86b9 126 // Used by DigitalInOut to set correct mode when direction is set
mbed_official 525:c320967f86b9 127 void gpio_dir(gpio_t *obj, PinDirection direction)
mbed_official 525:c320967f86b9 128 {
mbed_official 525:c320967f86b9 129 obj->dir = direction;
mbed_official 525:c320967f86b9 130 switch (direction) {
mbed_official 525:c320967f86b9 131 case PIN_INPUT:
mbed_official 525:c320967f86b9 132 gpio_mode(obj, PullDefault);
mbed_official 525:c320967f86b9 133 break;
mbed_official 525:c320967f86b9 134 case PIN_OUTPUT:
mbed_official 525:c320967f86b9 135 gpio_mode(obj, PullNone);
mbed_official 525:c320967f86b9 136 break;
mbed_official 525:c320967f86b9 137 }
mbed_official 525:c320967f86b9 138 }