mbed official
mbed library sources
Dependents: Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more
Superseded
This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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:
Import librarymbed
The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.
Last commit 20 Feb 2019 by 
mbed official
targets/hal/TARGET_NXP/TARGET_LPC11UXX/us_ticker.c@463:5c73c3744533, 2015-02-03 (annotated)
- Committer:
- mbed_official
- Date:
- Tue Feb 03 17:00:07 2015 +0000
- Revision:
- 463:5c73c3744533
- Parent:
- 304:89b9c3a9a045
Synchronized with git revision 134a67aab259d410373367cb96b73420b390d385
Full URL: https://github.com/mbedmicro/mbed/commit/134a67aab259d410373367cb96b73420b390d385/
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| emilmont | 10:3bc89ef62ce7 | 1 | /* mbed Microcontroller Library |
| emilmont | 10:3bc89ef62ce7 | 2 | * Copyright (c) 2006-2013 ARM Limited |
| emilmont | 10:3bc89ef62ce7 | 3 | * |
| emilmont | 10:3bc89ef62ce7 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| emilmont | 10:3bc89ef62ce7 | 5 | * you may not use this file except in compliance with the License. |
| emilmont | 10:3bc89ef62ce7 | 6 | * You may obtain a copy of the License at |
| emilmont | 10:3bc89ef62ce7 | 7 | * |
| emilmont | 10:3bc89ef62ce7 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| emilmont | 10:3bc89ef62ce7 | 9 | * |
| emilmont | 10:3bc89ef62ce7 | 10 | * Unless required by applicable law or agreed to in writing, software |
| emilmont | 10:3bc89ef62ce7 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| emilmont | 10:3bc89ef62ce7 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| emilmont | 10:3bc89ef62ce7 | 13 | * See the License for the specific language governing permissions and |
| emilmont | 10:3bc89ef62ce7 | 14 | * limitations under the License. |
| emilmont | 10:3bc89ef62ce7 | 15 | */ |
| emilmont | 10:3bc89ef62ce7 | 16 | #include <stddef.h> |
| emilmont | 10:3bc89ef62ce7 | 17 | #include "us_ticker_api.h" |
| emilmont | 10:3bc89ef62ce7 | 18 | #include "PeripheralNames.h" |
| emilmont | 10:3bc89ef62ce7 | 19 | |
| emilmont | 10:3bc89ef62ce7 | 20 | #define US_TICKER_TIMER ((LPC_CTxxBx_Type *)LPC_CT32B1_BASE) |
| emilmont | 10:3bc89ef62ce7 | 21 | #define US_TICKER_TIMER_IRQn TIMER_32_1_IRQn |
| emilmont | 10:3bc89ef62ce7 | 22 | |
| emilmont | 10:3bc89ef62ce7 | 23 | int us_ticker_inited = 0; |
| emilmont | 10:3bc89ef62ce7 | 24 | |
| emilmont | 10:3bc89ef62ce7 | 25 | void us_ticker_init(void) { |
| emilmont | 10:3bc89ef62ce7 | 26 | if (us_ticker_inited) return; |
| emilmont | 10:3bc89ef62ce7 | 27 | us_ticker_inited = 1; |
| emilmont | 10:3bc89ef62ce7 | 28 | |
| emilmont | 10:3bc89ef62ce7 | 29 | LPC_SYSCON->SYSAHBCLKCTRL |= (1<<10); // Clock TIMER_1 |
| emilmont | 10:3bc89ef62ce7 | 30 | uint32_t PCLK = SystemCoreClock; |
| emilmont | 10:3bc89ef62ce7 | 31 | |
| emilmont | 10:3bc89ef62ce7 | 32 | US_TICKER_TIMER->TCR = 0x2; // reset |
| emilmont | 10:3bc89ef62ce7 | 33 | |
| emilmont | 10:3bc89ef62ce7 | 34 | uint32_t prescale = PCLK / 1000000; // default to 1MHz (1 us ticks) |
| emilmont | 10:3bc89ef62ce7 | 35 | US_TICKER_TIMER->PR = prescale - 1; |
| emilmont | 10:3bc89ef62ce7 | 36 | US_TICKER_TIMER->TCR = 1; // enable = 1, reset = 0 |
| emilmont | 10:3bc89ef62ce7 | 37 | |
| emilmont | 10:3bc89ef62ce7 | 38 | NVIC_SetVector(US_TICKER_TIMER_IRQn, (uint32_t)us_ticker_irq_handler); |
| emilmont | 10:3bc89ef62ce7 | 39 | NVIC_EnableIRQ(US_TICKER_TIMER_IRQn); |
| emilmont | 10:3bc89ef62ce7 | 40 | } |
| emilmont | 10:3bc89ef62ce7 | 41 | |
| emilmont | 10:3bc89ef62ce7 | 42 | uint32_t us_ticker_read() { |
| emilmont | 10:3bc89ef62ce7 | 43 | if (!us_ticker_inited) |
| emilmont | 10:3bc89ef62ce7 | 44 | us_ticker_init(); |
| emilmont | 10:3bc89ef62ce7 | 45 | |
| emilmont | 10:3bc89ef62ce7 | 46 | return US_TICKER_TIMER->TC; |
| emilmont | 10:3bc89ef62ce7 | 47 | } |
| emilmont | 10:3bc89ef62ce7 | 48 | |
| mbed_official | 304:89b9c3a9a045 | 49 | void us_ticker_set_interrupt(timestamp_t timestamp) { |
| emilmont | 10:3bc89ef62ce7 | 50 | // set match value |
| mbed_official | 304:89b9c3a9a045 | 51 | US_TICKER_TIMER->MR0 = (uint32_t)timestamp; |
| emilmont | 10:3bc89ef62ce7 | 52 | // enable match interrupt |
| emilmont | 10:3bc89ef62ce7 | 53 | US_TICKER_TIMER->MCR |= 1; |
| emilmont | 10:3bc89ef62ce7 | 54 | } |
| emilmont | 10:3bc89ef62ce7 | 55 | |
| emilmont | 10:3bc89ef62ce7 | 56 | void us_ticker_disable_interrupt(void) { |
| emilmont | 10:3bc89ef62ce7 | 57 | US_TICKER_TIMER->MCR &= ~1; |
| emilmont | 10:3bc89ef62ce7 | 58 | } |
| emilmont | 10:3bc89ef62ce7 | 59 | |
| emilmont | 10:3bc89ef62ce7 | 60 | void us_ticker_clear_interrupt(void) { |
| emilmont | 10:3bc89ef62ce7 | 61 | US_TICKER_TIMER->IR = 1; |
| emilmont | 10:3bc89ef62ce7 | 62 | } |
