Helmut Tschemernjak / mbed-dev

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Fork of mbed-dev by mbed official

api/InterruptIn.h@128:c31e94a47539, 2016-05-13 (annotated)

Committer:
mbed_official
Date:
Fri May 13 16:00:11 2016 +0100
Revision:
128:c31e94a47539
Parent:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Synchronized with git revision 7bd986845c110b2c4e8bc58739a74757dd6ff493



Full URL: https://github.com/mbedmicro/mbed/commit/7bd986845c110b2c4e8bc58739a74757dd6ff493/



* [STM32F1 F4] Fix #1705 MBED_37



The transmit data register needs to be flushed at the initialisation of

the uart.

In case previous transmission was interrupted by a uart init, uart may

contain a char that will be transmitted at the next start.



This is the case in MBED_37 test (serial_auto_nc_rx).

The MCU is writting {{start}}\n

At the moment of the \n the main program is handling 'new serial'. The

next time the main program is handling a printf, the previous \n is

still present in the uart->DR register and is transmitted.

This cannot happen anymore with this commit



* [STM32_F1] Fix #1705 MBED_37 by resetting the uart

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 0:9b334a45a8ff 5 * you may not use this file except in compliance with the License.
bogdanm 0:9b334a45a8ff 6 * You may obtain a copy of the License at
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 0:9b334a45a8ff 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 0:9b334a45a8ff 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 0:9b334a45a8ff 13 * See the License for the specific language governing permissions and
bogdanm 0:9b334a45a8ff 14 * limitations under the License.
bogdanm 0:9b334a45a8ff 15 */
bogdanm 0:9b334a45a8ff 16 #ifndef MBED_INTERRUPTIN_H
bogdanm 0:9b334a45a8ff 17 #define MBED_INTERRUPTIN_H
bogdanm 0:9b334a45a8ff 18
bogdanm 0:9b334a45a8ff 19 #include "platform.h"
bogdanm 0:9b334a45a8ff 20
bogdanm 0:9b334a45a8ff 21 #if DEVICE_INTERRUPTIN
bogdanm 0:9b334a45a8ff 22
bogdanm 0:9b334a45a8ff 23 #include "gpio_api.h"
bogdanm 0:9b334a45a8ff 24 #include "gpio_irq_api.h"
bogdanm 0:9b334a45a8ff 25 #include "FunctionPointer.h"
bogdanm 0:9b334a45a8ff 26
bogdanm 0:9b334a45a8ff 27 namespace mbed {
bogdanm 0:9b334a45a8ff 28
bogdanm 0:9b334a45a8ff 29 /** A digital interrupt input, used to call a function on a rising or falling edge
bogdanm 0:9b334a45a8ff 30 *
bogdanm 0:9b334a45a8ff 31 * Example:
bogdanm 0:9b334a45a8ff 32 * @code
bogdanm 0:9b334a45a8ff 33 * // Flash an LED while waiting for events
bogdanm 0:9b334a45a8ff 34 *
bogdanm 0:9b334a45a8ff 35 * #include "mbed.h"
bogdanm 0:9b334a45a8ff 36 *
bogdanm 0:9b334a45a8ff 37 * InterruptIn event(p16);
bogdanm 0:9b334a45a8ff 38 * DigitalOut led(LED1);
bogdanm 0:9b334a45a8ff 39 *
bogdanm 0:9b334a45a8ff 40 * void trigger() {
bogdanm 0:9b334a45a8ff 41 * printf("triggered!\n");
bogdanm 0:9b334a45a8ff 42 * }
bogdanm 0:9b334a45a8ff 43 *
bogdanm 0:9b334a45a8ff 44 * int main() {
bogdanm 0:9b334a45a8ff 45 * event.rise(&trigger);
bogdanm 0:9b334a45a8ff 46 * while(1) {
bogdanm 0:9b334a45a8ff 47 * led = !led;
bogdanm 0:9b334a45a8ff 48 * wait(0.25);
bogdanm 0:9b334a45a8ff 49 * }
bogdanm 0:9b334a45a8ff 50 * }
bogdanm 0:9b334a45a8ff 51 * @endcode
bogdanm 0:9b334a45a8ff 52 */
bogdanm 0:9b334a45a8ff 53 class InterruptIn {
bogdanm 0:9b334a45a8ff 54
bogdanm 0:9b334a45a8ff 55 public:
bogdanm 0:9b334a45a8ff 56
bogdanm 0:9b334a45a8ff 57 /** Create an InterruptIn connected to the specified pin
bogdanm 0:9b334a45a8ff 58 *
bogdanm 0:9b334a45a8ff 59 * @param pin InterruptIn pin to connect to
bogdanm 0:9b334a45a8ff 60 * @param name (optional) A string to identify the object
bogdanm 0:9b334a45a8ff 61 */
bogdanm 0:9b334a45a8ff 62 InterruptIn(PinName pin);
bogdanm 0:9b334a45a8ff 63 virtual ~InterruptIn();
bogdanm 0:9b334a45a8ff 64
bogdanm 0:9b334a45a8ff 65 int read();
bogdanm 0:9b334a45a8ff 66 #ifdef MBED_OPERATORS
bogdanm 0:9b334a45a8ff 67 operator int();
bogdanm 0:9b334a45a8ff 68
bogdanm 0:9b334a45a8ff 69 #endif
bogdanm 0:9b334a45a8ff 70
bogdanm 0:9b334a45a8ff 71 /** Attach a function to call when a rising edge occurs on the input
bogdanm 0:9b334a45a8ff 72 *
bogdanm 0:9b334a45a8ff 73 * @param fptr A pointer to a void function, or 0 to set as none
bogdanm 0:9b334a45a8ff 74 */
bogdanm 0:9b334a45a8ff 75 void rise(void (*fptr)(void));
bogdanm 0:9b334a45a8ff 76
bogdanm 0:9b334a45a8ff 77 /** Attach a member function to call when a rising edge occurs on the input
bogdanm 0:9b334a45a8ff 78 *
bogdanm 0:9b334a45a8ff 79 * @param tptr pointer to the object to call the member function on
bogdanm 0:9b334a45a8ff 80 * @param mptr pointer to the member function to be called
bogdanm 0:9b334a45a8ff 81 */
bogdanm 0:9b334a45a8ff 82 template<typename T>
bogdanm 0:9b334a45a8ff 83 void rise(T* tptr, void (T::*mptr)(void)) {
bogdanm 0:9b334a45a8ff 84 _rise.attach(tptr, mptr);
bogdanm 0:9b334a45a8ff 85 gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
bogdanm 0:9b334a45a8ff 86 }
bogdanm 0:9b334a45a8ff 87
bogdanm 0:9b334a45a8ff 88 /** Attach a function to call when a falling edge occurs on the input
bogdanm 0:9b334a45a8ff 89 *
bogdanm 0:9b334a45a8ff 90 * @param fptr A pointer to a void function, or 0 to set as none
bogdanm 0:9b334a45a8ff 91 */
bogdanm 0:9b334a45a8ff 92 void fall(void (*fptr)(void));
bogdanm 0:9b334a45a8ff 93
bogdanm 0:9b334a45a8ff 94 /** Attach a member function to call when a falling edge occurs on the input
bogdanm 0:9b334a45a8ff 95 *
bogdanm 0:9b334a45a8ff 96 * @param tptr pointer to the object to call the member function on
bogdanm 0:9b334a45a8ff 97 * @param mptr pointer to the member function to be called
bogdanm 0:9b334a45a8ff 98 */
bogdanm 0:9b334a45a8ff 99 template<typename T>
bogdanm 0:9b334a45a8ff 100 void fall(T* tptr, void (T::*mptr)(void)) {
bogdanm 0:9b334a45a8ff 101 _fall.attach(tptr, mptr);
bogdanm 0:9b334a45a8ff 102 gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
bogdanm 0:9b334a45a8ff 103 }
bogdanm 0:9b334a45a8ff 104
bogdanm 0:9b334a45a8ff 105 /** Set the input pin mode
bogdanm 0:9b334a45a8ff 106 *
bogdanm 0:9b334a45a8ff 107 * @param mode PullUp, PullDown, PullNone
bogdanm 0:9b334a45a8ff 108 */
bogdanm 0:9b334a45a8ff 109 void mode(PinMode pull);
bogdanm 0:9b334a45a8ff 110
bogdanm 0:9b334a45a8ff 111 /** Enable IRQ. This method depends on hw implementation, might enable one
bogdanm 0:9b334a45a8ff 112 * port interrupts. For further information, check gpio_irq_enable().
bogdanm 0:9b334a45a8ff 113 */
bogdanm 0:9b334a45a8ff 114 void enable_irq();
bogdanm 0:9b334a45a8ff 115
bogdanm 0:9b334a45a8ff 116 /** Disable IRQ. This method depends on hw implementation, might disable one
bogdanm 0:9b334a45a8ff 117 * port interrupts. For further information, check gpio_irq_disable().
bogdanm 0:9b334a45a8ff 118 */
bogdanm 0:9b334a45a8ff 119 void disable_irq();
bogdanm 0:9b334a45a8ff 120
bogdanm 0:9b334a45a8ff 121 static void _irq_handler(uint32_t id, gpio_irq_event event);
bogdanm 0:9b334a45a8ff 122
bogdanm 0:9b334a45a8ff 123 protected:
bogdanm 0:9b334a45a8ff 124 gpio_t gpio;
bogdanm 0:9b334a45a8ff 125 gpio_irq_t gpio_irq;
bogdanm 0:9b334a45a8ff 126
bogdanm 0:9b334a45a8ff 127 FunctionPointer _rise;
bogdanm 0:9b334a45a8ff 128 FunctionPointer _fall;
bogdanm 0:9b334a45a8ff 129 };
bogdanm 0:9b334a45a8ff 130
bogdanm 0:9b334a45a8ff 131 } // namespace mbed
bogdanm 0:9b334a45a8ff 132
bogdanm 0:9b334a45a8ff 133 #endif
bogdanm 0:9b334a45a8ff 134
bogdanm 0:9b334a45a8ff 135 #endif