Team DIANA / mbed-src

I don't know

Dependents:   MX106-finaltest

Fork of mbed-src 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 }