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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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

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_NORDIC/TARGET_MCU_NRF51822/us_ticker.c@270:e2babe29baf8, 2014-08-01 (annotated)

Committer:
mbed_official
Date:
Fri Aug 01 14:45:06 2014 +0100
Revision:
270:e2babe29baf8
Parent:
targets/hal/TARGET_NORDIC/TARGET_NRF51822/us_ticker.c@224:e7c230c6cb31
Child:
300:55638feb26a4
Synchronized with git revision 988c22d5984ba5565d9e83305cc1eb6431a683ee



Full URL: https://github.com/mbedmicro/mbed/commit/988c22d5984ba5565d9e83305cc1eb6431a683ee/



Fixed L6235E link error for NRF51822 variants

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 85:e1a8e879a6a9 1 /* mbed Microcontroller Library
mbed_official 104:a6a92e2e5a92 2 * Copyright (c) 2013 Nordic Semiconductor
mbed_official 85:e1a8e879a6a9 3 *
mbed_official 85:e1a8e879a6a9 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 85:e1a8e879a6a9 5 * you may not use this file except in compliance with the License.
mbed_official 85:e1a8e879a6a9 6 * You may obtain a copy of the License at
mbed_official 85:e1a8e879a6a9 7 *
mbed_official 85:e1a8e879a6a9 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 85:e1a8e879a6a9 9 *
mbed_official 85:e1a8e879a6a9 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 85:e1a8e879a6a9 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 85:e1a8e879a6a9 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 85:e1a8e879a6a9 13 * See the License for the specific language governing permissions and
mbed_official 85:e1a8e879a6a9 14 * limitations under the License.
mbed_official 85:e1a8e879a6a9 15 */
mbed_official 85:e1a8e879a6a9 16 #include <stddef.h>
mbed_official 85:e1a8e879a6a9 17 #include "us_ticker_api.h"
mbed_official 85:e1a8e879a6a9 18 #include "cmsis.h"
mbed_official 85:e1a8e879a6a9 19 #include "PeripheralNames.h"
mbed_official 85:e1a8e879a6a9 20
mbed_official 85:e1a8e879a6a9 21 #define US_TICKER_TIMER NRF_TIMER1
mbed_official 85:e1a8e879a6a9 22 #define US_TICKER_TIMER_IRQn TIMER1_IRQn
mbed_official 85:e1a8e879a6a9 23
mbed_official 85:e1a8e879a6a9 24 int us_ticker_inited = 0;
mbed_official 85:e1a8e879a6a9 25 volatile uint16_t overflow=0; //overflow value that forms the upper 16 bits of the counter
mbed_official 85:e1a8e879a6a9 26 volatile uint16_t timeStamp=0;
mbed_official 85:e1a8e879a6a9 27
mbed_official 85:e1a8e879a6a9 28 #ifdef __cplusplus
mbed_official 85:e1a8e879a6a9 29 extern "C" {
mbed_official 85:e1a8e879a6a9 30 #endif
mbed_official 127:ce7cebc0511f 31 void TIMER1_IRQHandler(void){
mbed_official 127:ce7cebc0511f 32
mbed_official 127:ce7cebc0511f 33 if ((US_TICKER_TIMER->EVENTS_COMPARE[1] != 0) &&
mbed_official 85:e1a8e879a6a9 34 ((US_TICKER_TIMER->INTENSET & TIMER_INTENSET_COMPARE1_Msk) != 0))
mbed_official 85:e1a8e879a6a9 35 {
mbed_official 85:e1a8e879a6a9 36 US_TICKER_TIMER->EVENTS_COMPARE[1] = 0;
mbed_official 85:e1a8e879a6a9 37 overflow++;
mbed_official 85:e1a8e879a6a9 38 US_TICKER_TIMER->CC[1] =0xFFFF;
mbed_official 85:e1a8e879a6a9 39 if(timeStamp>0)
mbed_official 85:e1a8e879a6a9 40 {
mbed_official 85:e1a8e879a6a9 41 timeStamp--;
mbed_official 85:e1a8e879a6a9 42 if(timeStamp==0)
mbed_official 85:e1a8e879a6a9 43 {
mbed_official 85:e1a8e879a6a9 44 us_ticker_clear_interrupt();
mbed_official 85:e1a8e879a6a9 45 us_ticker_disable_interrupt();
mbed_official 85:e1a8e879a6a9 46 us_ticker_irq_handler();
mbed_official 85:e1a8e879a6a9 47 return;
mbed_official 85:e1a8e879a6a9 48 }
mbed_official 85:e1a8e879a6a9 49 }
mbed_official 85:e1a8e879a6a9 50 }
mbed_official 85:e1a8e879a6a9 51 if ((US_TICKER_TIMER->EVENTS_COMPARE[0] != 0) &&
mbed_official 85:e1a8e879a6a9 52 ((US_TICKER_TIMER->INTENSET & TIMER_INTENSET_COMPARE0_Msk) != 0))
mbed_official 85:e1a8e879a6a9 53 {
mbed_official 85:e1a8e879a6a9 54 us_ticker_clear_interrupt();
mbed_official 85:e1a8e879a6a9 55 us_ticker_disable_interrupt();
mbed_official 85:e1a8e879a6a9 56 if(timeStamp==0)
mbed_official 85:e1a8e879a6a9 57 us_ticker_irq_handler();
mbed_official 85:e1a8e879a6a9 58 }
mbed_official 85:e1a8e879a6a9 59
mbed_official 85:e1a8e879a6a9 60 }
mbed_official 85:e1a8e879a6a9 61 #ifdef __cplusplus
mbed_official 85:e1a8e879a6a9 62 }
mbed_official 85:e1a8e879a6a9 63 #endif
mbed_official 85:e1a8e879a6a9 64 void us_ticker_init(void){
mbed_official 224:e7c230c6cb31 65 if (us_ticker_inited && US_TICKER_TIMER->POWER){
mbed_official 85:e1a8e879a6a9 66 return;
mbed_official 85:e1a8e879a6a9 67 }
mbed_official 85:e1a8e879a6a9 68
mbed_official 85:e1a8e879a6a9 69 us_ticker_inited = 1;
mbed_official 85:e1a8e879a6a9 70
mbed_official 85:e1a8e879a6a9 71 US_TICKER_TIMER->POWER = 0;
mbed_official 85:e1a8e879a6a9 72 US_TICKER_TIMER->POWER = 1;
mbed_official 85:e1a8e879a6a9 73
mbed_official 85:e1a8e879a6a9 74 US_TICKER_TIMER->MODE = TIMER_MODE_MODE_Timer;
mbed_official 85:e1a8e879a6a9 75
mbed_official 85:e1a8e879a6a9 76 US_TICKER_TIMER->PRESCALER = 4;
mbed_official 85:e1a8e879a6a9 77 US_TICKER_TIMER->BITMODE = TIMER_BITMODE_BITMODE_16Bit;
mbed_official 224:e7c230c6cb31 78 US_TICKER_TIMER->TASKS_CLEAR =1;
mbed_official 224:e7c230c6cb31 79 US_TICKER_TIMER->CC[1] = 0xFFFF;
mbed_official 224:e7c230c6cb31 80 US_TICKER_TIMER->INTENSET = TIMER_INTENSET_COMPARE1_Set << TIMER_INTENSET_COMPARE1_Pos;
mbed_official 85:e1a8e879a6a9 81
mbed_official 224:e7c230c6cb31 82 NVIC_SetPriority(US_TICKER_TIMER_IRQn, 3);
mbed_official 85:e1a8e879a6a9 83 NVIC_EnableIRQ(US_TICKER_TIMER_IRQn);
mbed_official 85:e1a8e879a6a9 84
mbed_official 85:e1a8e879a6a9 85 US_TICKER_TIMER->TASKS_START = 0x01;
mbed_official 85:e1a8e879a6a9 86 }
mbed_official 85:e1a8e879a6a9 87
mbed_official 85:e1a8e879a6a9 88 uint32_t us_ticker_read(){
mbed_official 224:e7c230c6cb31 89 if (!us_ticker_inited || US_TICKER_TIMER->POWER==0){
mbed_official 85:e1a8e879a6a9 90 us_ticker_init();
mbed_official 85:e1a8e879a6a9 91 }
mbed_official 85:e1a8e879a6a9 92
mbed_official 85:e1a8e879a6a9 93 uint16_t bufferedOverFlow = overflow;
mbed_official 85:e1a8e879a6a9 94 US_TICKER_TIMER->TASKS_CAPTURE[2] = 1;
mbed_official 85:e1a8e879a6a9 95
mbed_official 85:e1a8e879a6a9 96 if(overflow!=bufferedOverFlow){
mbed_official 85:e1a8e879a6a9 97 bufferedOverFlow = overflow;
mbed_official 85:e1a8e879a6a9 98 US_TICKER_TIMER->TASKS_CAPTURE[2] = 1;
mbed_official 85:e1a8e879a6a9 99 }
mbed_official 85:e1a8e879a6a9 100 return (((uint32_t)bufferedOverFlow<<16) | US_TICKER_TIMER->CC[2]);
mbed_official 85:e1a8e879a6a9 101 }
mbed_official 85:e1a8e879a6a9 102
mbed_official 85:e1a8e879a6a9 103 void us_ticker_set_interrupt(unsigned int timestamp){
mbed_official 224:e7c230c6cb31 104 if (!us_ticker_inited || US_TICKER_TIMER->POWER==0)
mbed_official 85:e1a8e879a6a9 105 {
mbed_official 85:e1a8e879a6a9 106 us_ticker_init();
mbed_official 85:e1a8e879a6a9 107 }
mbed_official 85:e1a8e879a6a9 108
mbed_official 85:e1a8e879a6a9 109 US_TICKER_TIMER->TASKS_CAPTURE[0] = 1;
mbed_official 85:e1a8e879a6a9 110 uint16_t tsUpper16 = (uint16_t)((timestamp-us_ticker_read())>>16);
mbed_official 85:e1a8e879a6a9 111 if(tsUpper16>0){
mbed_official 85:e1a8e879a6a9 112 if(timeStamp ==0 || timeStamp> tsUpper16){
mbed_official 85:e1a8e879a6a9 113 timeStamp = tsUpper16;
mbed_official 85:e1a8e879a6a9 114 }
mbed_official 85:e1a8e879a6a9 115 }
mbed_official 85:e1a8e879a6a9 116 else{
mbed_official 85:e1a8e879a6a9 117 US_TICKER_TIMER->INTENSET |= TIMER_INTENSET_COMPARE0_Set << TIMER_INTENSET_COMPARE0_Pos;
mbed_official 85:e1a8e879a6a9 118 US_TICKER_TIMER->CC[0] += timestamp-us_ticker_read();
mbed_official 85:e1a8e879a6a9 119 }
mbed_official 85:e1a8e879a6a9 120 }
mbed_official 85:e1a8e879a6a9 121
mbed_official 85:e1a8e879a6a9 122 void us_ticker_disable_interrupt(void){
mbed_official 85:e1a8e879a6a9 123 US_TICKER_TIMER->INTENCLR = TIMER_INTENCLR_COMPARE0_Clear << TIMER_INTENCLR_COMPARE0_Pos;
mbed_official 85:e1a8e879a6a9 124 }
mbed_official 85:e1a8e879a6a9 125 void us_ticker_clear_interrupt(void){
mbed_official 85:e1a8e879a6a9 126 US_TICKER_TIMER->EVENTS_COMPARE[0] = 0;
mbed_official 85:e1a8e879a6a9 127 }