mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_ARM_SSG/TARGET_MPS2/us_ticker.c@169:e3b6fe271b81, 2017-07-19 (annotated)

Committer:
Kojto
Date:
Wed Jul 19 17:31:21 2017 +0100
Revision:
169:e3b6fe271b81
Parent:
149:156823d33999
Child:
174:b96e65c34a4d
This updates the lib to the mbed lib v 147

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2015 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #include <stddef.h>
<> 144:ef7eb2e8f9f7 17 #include "us_ticker_api.h"
<> 144:ef7eb2e8f9f7 18 #include "PeripheralNames.h"
<> 144:ef7eb2e8f9f7 19
<> 144:ef7eb2e8f9f7 20 #define US_TICKER_TIMER1 CMSDK_DUALTIMER1
<> 144:ef7eb2e8f9f7 21 #define US_TICKER_TIMER2 CMSDK_DUALTIMER2
<> 144:ef7eb2e8f9f7 22 #define US_TICKER_TIMER_IRQn DUALTIMER_IRQn
<> 144:ef7eb2e8f9f7 23
<> 144:ef7eb2e8f9f7 24 int us_ticker_inited = 0;
<> 144:ef7eb2e8f9f7 25
<> 144:ef7eb2e8f9f7 26 void us_ticker_init(void) {
<> 144:ef7eb2e8f9f7 27 if (us_ticker_inited) return;
<> 144:ef7eb2e8f9f7 28 us_ticker_inited = 1;
<> 144:ef7eb2e8f9f7 29
<> 144:ef7eb2e8f9f7 30 US_TICKER_TIMER1->TimerControl = 0x0; // disable timer
<> 144:ef7eb2e8f9f7 31 US_TICKER_TIMER2->TimerControl = 0x00; // disable timer
<> 144:ef7eb2e8f9f7 32 US_TICKER_TIMER1->TimerLoad = 0xFFFFFFFF;
<> 144:ef7eb2e8f9f7 33 US_TICKER_TIMER2->TimerLoad = 0xFFFFFFFF;
<> 144:ef7eb2e8f9f7 34
<> 144:ef7eb2e8f9f7 35 US_TICKER_TIMER1->TimerControl = 0x62; // enable interrupt and set to 32 bit counter and set to periodic mode
<> 144:ef7eb2e8f9f7 36 US_TICKER_TIMER2->TimerControl = 0x42; // enable interrupt and set to 32 bit counter
<> 144:ef7eb2e8f9f7 37
<> 144:ef7eb2e8f9f7 38 US_TICKER_TIMER1->TimerControl |= 0x80; // enable counter
<> 144:ef7eb2e8f9f7 39 US_TICKER_TIMER2->TimerControl |= 0x80; // enable counter
<> 144:ef7eb2e8f9f7 40
<> 144:ef7eb2e8f9f7 41 NVIC_SetVector(US_TICKER_TIMER_IRQn, (uint32_t)us_ticker_irq_handler);
<> 144:ef7eb2e8f9f7 42 NVIC_EnableIRQ(US_TICKER_TIMER_IRQn);
<> 144:ef7eb2e8f9f7 43 }
<> 144:ef7eb2e8f9f7 44
<> 144:ef7eb2e8f9f7 45 uint32_t us_ticker_read() {
<> 144:ef7eb2e8f9f7 46 uint32_t return_value = 0;
<> 144:ef7eb2e8f9f7 47 if (!us_ticker_inited)
<> 144:ef7eb2e8f9f7 48 us_ticker_init();
<> 144:ef7eb2e8f9f7 49 return_value = ((~US_TICKER_TIMER2->TimerValue)/25);
<> 144:ef7eb2e8f9f7 50 return return_value;
<> 144:ef7eb2e8f9f7 51 }
<> 144:ef7eb2e8f9f7 52
<> 144:ef7eb2e8f9f7 53 void us_ticker_set_interrupt(timestamp_t timestamp) {
<> 144:ef7eb2e8f9f7 54 int delta = 0;
<> 144:ef7eb2e8f9f7 55 if (!us_ticker_inited)
<> 144:ef7eb2e8f9f7 56 us_ticker_init();
<> 144:ef7eb2e8f9f7 57 delta = (int)(timestamp - us_ticker_read());
<> 144:ef7eb2e8f9f7 58 if (delta <= 0) {
<> 144:ef7eb2e8f9f7 59 // This event was in the past:
<> 144:ef7eb2e8f9f7 60 us_ticker_irq_handler();
<> 144:ef7eb2e8f9f7 61 return;
<> 144:ef7eb2e8f9f7 62 }
<> 144:ef7eb2e8f9f7 63 // enable interrupt
<> 144:ef7eb2e8f9f7 64 US_TICKER_TIMER1->TimerControl = 0x0; // disable timer
<> 144:ef7eb2e8f9f7 65 US_TICKER_TIMER1->TimerControl = 0x62; // enable interrupt and set to 32 bit counter and set to periodic mode
<> 144:ef7eb2e8f9f7 66 US_TICKER_TIMER1->TimerLoad = (delta)*25; //initialise the timer value
<> 144:ef7eb2e8f9f7 67 US_TICKER_TIMER1->TimerControl |= 0x80; //enable timer
<> 144:ef7eb2e8f9f7 68 }
<> 144:ef7eb2e8f9f7 69
<> 144:ef7eb2e8f9f7 70 void us_ticker_disable_interrupt(void) {
<> 144:ef7eb2e8f9f7 71
<> 144:ef7eb2e8f9f7 72 US_TICKER_TIMER1->TimerControl &= 0xDF;
<> 144:ef7eb2e8f9f7 73 US_TICKER_TIMER2->TimerControl &= 0xDF;
<> 144:ef7eb2e8f9f7 74
<> 144:ef7eb2e8f9f7 75 }
<> 144:ef7eb2e8f9f7 76
<> 144:ef7eb2e8f9f7 77 void us_ticker_clear_interrupt(void) {
<> 144:ef7eb2e8f9f7 78
<> 144:ef7eb2e8f9f7 79 US_TICKER_TIMER1->TimerIntClr = 0x1;
<> 144:ef7eb2e8f9f7 80 US_TICKER_TIMER2->TimerIntClr = 0x1;
<> 144:ef7eb2e8f9f7 81
<> 144:ef7eb2e8f9f7 82 }