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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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

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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_LPC11XX_11CXX/us_ticker.c@440:8a0b45cd594f, 2014-12-16 (annotated)

Committer:
mbed_official
Date:
Tue Dec 16 08:15:08 2014 +0000
Revision:
440:8a0b45cd594f
Parent:
304:89b9c3a9a045 
Synchronized with git revision 67fbbf0b635d0c0d93fbe433306c537c2ad206aa



Full URL: https://github.com/mbedmicro/mbed/commit/67fbbf0b635d0c0d93fbe433306c537c2ad206aa/



Targets: nrf51 - updating app_timer.c from Norid'c SDKv7.1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 30:91c1d09ada54 1 /* mbed Microcontroller Library
mbed_official 30:91c1d09ada54 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 30:91c1d09ada54 3 *
mbed_official 30:91c1d09ada54 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 30:91c1d09ada54 5 * you may not use this file except in compliance with the License.
mbed_official 30:91c1d09ada54 6 * You may obtain a copy of the License at
mbed_official 30:91c1d09ada54 7 *
mbed_official 30:91c1d09ada54 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 30:91c1d09ada54 9 *
mbed_official 30:91c1d09ada54 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 30:91c1d09ada54 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 30:91c1d09ada54 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 30:91c1d09ada54 13 * See the License for the specific language governing permissions and
mbed_official 30:91c1d09ada54 14 * limitations under the License.
mbed_official 30:91c1d09ada54 15 */
mbed_official 30:91c1d09ada54 16 #include <stddef.h>
mbed_official 30:91c1d09ada54 17 #include "us_ticker_api.h"
mbed_official 30:91c1d09ada54 18 #include "PeripheralNames.h"
mbed_official 30:91c1d09ada54 19
mbed_official 30:91c1d09ada54 20 #define US_TICKER_TIMER ((LPC_TMR_TypeDef *)LPC_CT32B1_BASE)
mbed_official 30:91c1d09ada54 21 #define US_TICKER_TIMER_IRQn TIMER_32_1_IRQn
mbed_official 30:91c1d09ada54 22
mbed_official 30:91c1d09ada54 23 int us_ticker_inited = 0;
mbed_official 30:91c1d09ada54 24
mbed_official 30:91c1d09ada54 25 void us_ticker_init(void) {
mbed_official 30:91c1d09ada54 26 if (us_ticker_inited) return;
mbed_official 30:91c1d09ada54 27 us_ticker_inited = 1;
mbed_official 30:91c1d09ada54 28
mbed_official 30:91c1d09ada54 29 LPC_SYSCON->SYSAHBCLKCTRL |= (1<<10); // Clock TIMER_1
mbed_official 30:91c1d09ada54 30 uint32_t PCLK = SystemCoreClock;
mbed_official 30:91c1d09ada54 31
mbed_official 30:91c1d09ada54 32 US_TICKER_TIMER->TCR = 0x2; // reset
mbed_official 30:91c1d09ada54 33
mbed_official 30:91c1d09ada54 34 uint32_t prescale = PCLK / 1000000; // default to 1MHz (1 us ticks)
mbed_official 30:91c1d09ada54 35 US_TICKER_TIMER->PR = prescale - 1;
mbed_official 30:91c1d09ada54 36 US_TICKER_TIMER->TCR = 1; // enable = 1, reset = 0
mbed_official 30:91c1d09ada54 37
mbed_official 30:91c1d09ada54 38 NVIC_SetVector(US_TICKER_TIMER_IRQn, (uint32_t)us_ticker_irq_handler);
mbed_official 30:91c1d09ada54 39 NVIC_EnableIRQ(US_TICKER_TIMER_IRQn);
mbed_official 30:91c1d09ada54 40 }
mbed_official 30:91c1d09ada54 41
mbed_official 30:91c1d09ada54 42 uint32_t us_ticker_read() {
mbed_official 30:91c1d09ada54 43 if (!us_ticker_inited)
mbed_official 30:91c1d09ada54 44 us_ticker_init();
mbed_official 30:91c1d09ada54 45
mbed_official 30:91c1d09ada54 46 return US_TICKER_TIMER->TC;
mbed_official 30:91c1d09ada54 47 }
mbed_official 30:91c1d09ada54 48
mbed_official 304:89b9c3a9a045 49 void us_ticker_set_interrupt(timestamp_t timestamp) {
mbed_official 30:91c1d09ada54 50 // set match value
mbed_official 304:89b9c3a9a045 51 US_TICKER_TIMER->MR0 = (uint32_t)timestamp;
mbed_official 30:91c1d09ada54 52 // enable match interrupt
mbed_official 30:91c1d09ada54 53 US_TICKER_TIMER->MCR |= 1;
mbed_official 30:91c1d09ada54 54 }
mbed_official 30:91c1d09ada54 55
mbed_official 30:91c1d09ada54 56 void us_ticker_disable_interrupt(void) {
mbed_official 30:91c1d09ada54 57 US_TICKER_TIMER->MCR &= ~1;
mbed_official 30:91c1d09ada54 58 }
mbed_official 30:91c1d09ada54 59
mbed_official 30:91c1d09ada54 60 void us_ticker_clear_interrupt(void) {
mbed_official 30:91c1d09ada54 61 US_TICKER_TIMER->IR = 1;
mbed_official 30:91c1d09ada54 62 }