Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

api/PortIn.h@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #ifndef MBED_PORTIN_H
<> 144:ef7eb2e8f9f7 17 #define MBED_PORTIN_H
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 #include "platform.h"
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 #if DEVICE_PORTIN
<> 144:ef7eb2e8f9f7 22
<> 144:ef7eb2e8f9f7 23 #include "port_api.h"
<> 144:ef7eb2e8f9f7 24 #include "critical.h"
<> 144:ef7eb2e8f9f7 25
<> 144:ef7eb2e8f9f7 26 namespace mbed {
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28 /** A multiple pin digital input
<> 144:ef7eb2e8f9f7 29 *
<> 144:ef7eb2e8f9f7 30 * @Note Synchronization level: Interrupt safe
<> 144:ef7eb2e8f9f7 31 *
<> 144:ef7eb2e8f9f7 32 * Example:
<> 144:ef7eb2e8f9f7 33 * @code
<> 144:ef7eb2e8f9f7 34 * // Switch on an LED if any of mbed pins 21-26 is high
<> 144:ef7eb2e8f9f7 35 *
<> 144:ef7eb2e8f9f7 36 * #include "mbed.h"
<> 144:ef7eb2e8f9f7 37 *
<> 144:ef7eb2e8f9f7 38 * PortIn p(Port2, 0x0000003F); // p21-p26
<> 144:ef7eb2e8f9f7 39 * DigitalOut ind(LED4);
<> 144:ef7eb2e8f9f7 40 *
<> 144:ef7eb2e8f9f7 41 * int main() {
<> 144:ef7eb2e8f9f7 42 * while(1) {
<> 144:ef7eb2e8f9f7 43 * int pins = p.read();
<> 144:ef7eb2e8f9f7 44 * if(pins) {
<> 144:ef7eb2e8f9f7 45 * ind = 1;
<> 144:ef7eb2e8f9f7 46 * } else {
<> 144:ef7eb2e8f9f7 47 * ind = 0;
<> 144:ef7eb2e8f9f7 48 * }
<> 144:ef7eb2e8f9f7 49 * }
<> 144:ef7eb2e8f9f7 50 * }
<> 144:ef7eb2e8f9f7 51 * @endcode
<> 144:ef7eb2e8f9f7 52 */
<> 144:ef7eb2e8f9f7 53 class PortIn {
<> 144:ef7eb2e8f9f7 54 public:
<> 144:ef7eb2e8f9f7 55
<> 144:ef7eb2e8f9f7 56 /** Create an PortIn, connected to the specified port
<> 144:ef7eb2e8f9f7 57 *
<> 144:ef7eb2e8f9f7 58 * @param port Port to connect to (Port0-Port5)
<> 144:ef7eb2e8f9f7 59 * @param mask A bitmask to identify which bits in the port should be included (0 - ignore)
<> 144:ef7eb2e8f9f7 60 */
<> 144:ef7eb2e8f9f7 61 PortIn(PortName port, int mask = 0xFFFFFFFF) {
<> 144:ef7eb2e8f9f7 62 core_util_critical_section_enter();
<> 144:ef7eb2e8f9f7 63 port_init(&_port, port, mask, PIN_INPUT);
<> 144:ef7eb2e8f9f7 64 core_util_critical_section_exit();
<> 144:ef7eb2e8f9f7 65 }
<> 144:ef7eb2e8f9f7 66
<> 144:ef7eb2e8f9f7 67 /** Read the value currently output on the port
<> 144:ef7eb2e8f9f7 68 *
<> 144:ef7eb2e8f9f7 69 * @returns
<> 144:ef7eb2e8f9f7 70 * An integer with each bit corresponding to associated port pin setting
<> 144:ef7eb2e8f9f7 71 */
<> 144:ef7eb2e8f9f7 72 int read() {
<> 144:ef7eb2e8f9f7 73 return port_read(&_port);
<> 144:ef7eb2e8f9f7 74 }
<> 144:ef7eb2e8f9f7 75
<> 144:ef7eb2e8f9f7 76 /** Set the input pin mode
<> 144:ef7eb2e8f9f7 77 *
<> 144:ef7eb2e8f9f7 78 * @param mode PullUp, PullDown, PullNone, OpenDrain
<> 144:ef7eb2e8f9f7 79 */
<> 144:ef7eb2e8f9f7 80 void mode(PinMode mode) {
<> 144:ef7eb2e8f9f7 81 core_util_critical_section_enter();
<> 144:ef7eb2e8f9f7 82 port_mode(&_port, mode);
<> 144:ef7eb2e8f9f7 83 core_util_critical_section_exit();
<> 144:ef7eb2e8f9f7 84 }
<> 144:ef7eb2e8f9f7 85
<> 144:ef7eb2e8f9f7 86 /** A shorthand for read()
<> 144:ef7eb2e8f9f7 87 */
<> 144:ef7eb2e8f9f7 88 operator int() {
<> 144:ef7eb2e8f9f7 89 return read();
<> 144:ef7eb2e8f9f7 90 }
<> 144:ef7eb2e8f9f7 91
<> 144:ef7eb2e8f9f7 92 private:
<> 144:ef7eb2e8f9f7 93 port_t _port;
<> 144:ef7eb2e8f9f7 94 };
<> 144:ef7eb2e8f9f7 95
<> 144:ef7eb2e8f9f7 96 } // namespace mbed
<> 144:ef7eb2e8f9f7 97
<> 144:ef7eb2e8f9f7 98 #endif
<> 144:ef7eb2e8f9f7 99
<> 144:ef7eb2e8f9f7 100 #endif