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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_LPC13XX/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
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library
bogdanm 13:0645d8841f51 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 13:0645d8841f51 3 *
bogdanm 13:0645d8841f51 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 13:0645d8841f51 5 * you may not use this file except in compliance with the License.
bogdanm 13:0645d8841f51 6 * You may obtain a copy of the License at
bogdanm 13:0645d8841f51 7 *
bogdanm 13:0645d8841f51 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 13:0645d8841f51 9 *
bogdanm 13:0645d8841f51 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 13:0645d8841f51 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 13:0645d8841f51 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 13:0645d8841f51 13 * See the License for the specific language governing permissions and
bogdanm 13:0645d8841f51 14 * limitations under the License.
bogdanm 13:0645d8841f51 15 */
bogdanm 13:0645d8841f51 16 #include <stddef.h>
bogdanm 13:0645d8841f51 17 #include "us_ticker_api.h"
bogdanm 13:0645d8841f51 18 #include "PeripheralNames.h"
bogdanm 13:0645d8841f51 19
bogdanm 13:0645d8841f51 20 #define US_TICKER_TIMER ((LPC_CT32B1_Type *)LPC_CT32B1_BASE)
bogdanm 13:0645d8841f51 21 #define US_TICKER_TIMER_IRQn CT32B1_IRQn
bogdanm 13:0645d8841f51 22
bogdanm 13:0645d8841f51 23 int us_ticker_inited = 0;
bogdanm 13:0645d8841f51 24
bogdanm 13:0645d8841f51 25 void us_ticker_init(void) {
bogdanm 13:0645d8841f51 26 if (us_ticker_inited) return;
bogdanm 13:0645d8841f51 27 us_ticker_inited = 1;
bogdanm 13:0645d8841f51 28
bogdanm 13:0645d8841f51 29 LPC_SYSCON->SYSAHBCLKCTRL |= (1<<10); // Clock TIMER_1
bogdanm 13:0645d8841f51 30 uint32_t PCLK = SystemCoreClock;
bogdanm 13:0645d8841f51 31
bogdanm 13:0645d8841f51 32 US_TICKER_TIMER->TCR = 0x2; // reset
bogdanm 13:0645d8841f51 33
bogdanm 13:0645d8841f51 34 uint32_t prescale = PCLK / 1000000; // default to 1MHz (1 us ticks)
bogdanm 13:0645d8841f51 35 US_TICKER_TIMER->PR = prescale - 1;
bogdanm 13:0645d8841f51 36 US_TICKER_TIMER->TCR = 1; // enable = 1, reset = 0
bogdanm 13:0645d8841f51 37
bogdanm 13:0645d8841f51 38 NVIC_SetVector(US_TICKER_TIMER_IRQn, (uint32_t)us_ticker_irq_handler);
bogdanm 13:0645d8841f51 39 NVIC_EnableIRQ(US_TICKER_TIMER_IRQn);
bogdanm 13:0645d8841f51 40 }
bogdanm 13:0645d8841f51 41
bogdanm 13:0645d8841f51 42 uint32_t us_ticker_read() {
bogdanm 13:0645d8841f51 43 if (!us_ticker_inited)
bogdanm 13:0645d8841f51 44 us_ticker_init();
bogdanm 13:0645d8841f51 45
bogdanm 13:0645d8841f51 46 return US_TICKER_TIMER->TC;
bogdanm 13:0645d8841f51 47 }
bogdanm 13:0645d8841f51 48
mbed_official 304:89b9c3a9a045 49 void us_ticker_set_interrupt(timestamp_t timestamp) {
bogdanm 13:0645d8841f51 50 // set match value
mbed_official 304:89b9c3a9a045 51 US_TICKER_TIMER->MR0 = (uint32_t)timestamp;
bogdanm 13:0645d8841f51 52 // enable match interrupt
bogdanm 13:0645d8841f51 53 US_TICKER_TIMER->MCR |= 1;
bogdanm 13:0645d8841f51 54 }
bogdanm 13:0645d8841f51 55
bogdanm 13:0645d8841f51 56 void us_ticker_disable_interrupt(void) {
bogdanm 13:0645d8841f51 57 US_TICKER_TIMER->MCR &= ~1;
bogdanm 13:0645d8841f51 58 }
bogdanm 13:0645d8841f51 59
bogdanm 13:0645d8841f51 60 void us_ticker_clear_interrupt(void) {
bogdanm 13:0645d8841f51 61 US_TICKER_TIMER->IR = 1;
bogdanm 13:0645d8841f51 62 }