Sigve Sebastian Farstad / mbed-src

mbed w/ spi bug fig

Dependents:   display-puck

Fork of mbed-src by mbed official

targets/hal/TARGET_NORDIC/TARGET_NRF51822/us_ticker.c@224:e7c230c6cb31, 2014-06-11 (annotated)

Committer:
mbed_official
Date:
Wed Jun 11 08:45:06 2014 +0100
Revision:
224:e7c230c6cb31
Parent:
127:ce7cebc0511f 
Synchronized with git revision aba739c87ab2f5818b5d93891d83ff87538d55e5



Full URL: https://github.com/mbedmicro/mbed/commit/aba739c87ab2f5818b5d93891d83ff87538d55e5/



[NRF51822] Re-init NRF Timer if powered down

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 }