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_IOTSS/us_ticker.c@174:b96e65c34a4d, 2017-10-02 (annotated)

Committer:
AnnaBridge
Date:
Mon Oct 02 15:33:19 2017 +0100
Revision:
174:b96e65c34a4d
Parent:
149:156823d33999
Child:
188:bcfe06ba3d64
This updates the lib to the mbed lib v 152

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 80:bdf1132a57cf 1 /* mbed Microcontroller Library
mbed_official 80:bdf1132a57cf 2 * Copyright (c) 2006-2015 ARM Limited
mbed_official 80:bdf1132a57cf 3 *
mbed_official 80:bdf1132a57cf 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 80:bdf1132a57cf 5 * you may not use this file except in compliance with the License.
mbed_official 80:bdf1132a57cf 6 * You may obtain a copy of the License at
mbed_official 80:bdf1132a57cf 7 *
mbed_official 80:bdf1132a57cf 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 80:bdf1132a57cf 9 *
mbed_official 80:bdf1132a57cf 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 80:bdf1132a57cf 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 80:bdf1132a57cf 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 80:bdf1132a57cf 13 * See the License for the specific language governing permissions and
mbed_official 80:bdf1132a57cf 14 * limitations under the License.
mbed_official 80:bdf1132a57cf 15 */
mbed_official 80:bdf1132a57cf 16 #include <stddef.h>
mbed_official 80:bdf1132a57cf 17 #include "us_ticker_api.h"
mbed_official 80:bdf1132a57cf 18 #include "PeripheralNames.h"
mbed_official 80:bdf1132a57cf 19
mbed_official 80:bdf1132a57cf 20 #define US_TICKER_TIMER1 CMSDK_DUALTIMER1
mbed_official 80:bdf1132a57cf 21 #define US_TICKER_TIMER2 CMSDK_DUALTIMER2
mbed_official 80:bdf1132a57cf 22 #define US_TICKER_TIMER_IRQn DUALTIMER_IRQn
mbed_official 80:bdf1132a57cf 23
mbed_official 80:bdf1132a57cf 24 int us_ticker_inited = 0;
mbed_official 80:bdf1132a57cf 25
mbed_official 80:bdf1132a57cf 26 void us_ticker_init(void) {
mbed_official 80:bdf1132a57cf 27 if (us_ticker_inited) return;
mbed_official 80:bdf1132a57cf 28 us_ticker_inited = 1;
mbed_official 80:bdf1132a57cf 29
mbed_official 80:bdf1132a57cf 30 US_TICKER_TIMER1->TimerControl = 0x0; // disable timer
mbed_official 80:bdf1132a57cf 31 US_TICKER_TIMER2->TimerControl = 0x00; // disable timer
mbed_official 80:bdf1132a57cf 32 US_TICKER_TIMER1->TimerLoad = 0xFFFFFFFF;
mbed_official 80:bdf1132a57cf 33 US_TICKER_TIMER2->TimerLoad = 0xFFFFFFFF;
mbed_official 80:bdf1132a57cf 34
mbed_official 80:bdf1132a57cf 35 US_TICKER_TIMER1->TimerControl = 0x62; // enable interrupt and set to 32 bit counter and set to periodic mode
mbed_official 80:bdf1132a57cf 36 US_TICKER_TIMER2->TimerControl = 0x42; // enable interrupt and set to 32 bit counter
mbed_official 80:bdf1132a57cf 37
mbed_official 80:bdf1132a57cf 38 US_TICKER_TIMER1->TimerControl |= 0x80; // enable counter
mbed_official 80:bdf1132a57cf 39 US_TICKER_TIMER2->TimerControl |= 0x80; // enable counter
mbed_official 80:bdf1132a57cf 40
mbed_official 80:bdf1132a57cf 41 NVIC_SetVector(US_TICKER_TIMER_IRQn, (uint32_t)us_ticker_irq_handler);
mbed_official 80:bdf1132a57cf 42 NVIC_EnableIRQ(US_TICKER_TIMER_IRQn);
mbed_official 80:bdf1132a57cf 43 }
mbed_official 80:bdf1132a57cf 44
mbed_official 80:bdf1132a57cf 45 uint32_t us_ticker_read() {
mbed_official 80:bdf1132a57cf 46 uint32_t return_value = 0;
mbed_official 80:bdf1132a57cf 47
mbed_official 80:bdf1132a57cf 48 if (!us_ticker_inited)
mbed_official 80:bdf1132a57cf 49 us_ticker_init();
mbed_official 80:bdf1132a57cf 50 return_value = ((~US_TICKER_TIMER2->TimerValue)/24);
mbed_official 80:bdf1132a57cf 51 return return_value;
mbed_official 80:bdf1132a57cf 52 }
mbed_official 80:bdf1132a57cf 53
mbed_official 80:bdf1132a57cf 54 void us_ticker_set_interrupt(timestamp_t timestamp) {
mbed_official 80:bdf1132a57cf 55 int delta = 0;
mbed_official 80:bdf1132a57cf 56
mbed_official 80:bdf1132a57cf 57 if (!us_ticker_inited)
mbed_official 80:bdf1132a57cf 58 us_ticker_init();
mbed_official 80:bdf1132a57cf 59 delta = (int)(timestamp - us_ticker_read());
mbed_official 80:bdf1132a57cf 60 if (delta <= 0) {
mbed_official 80:bdf1132a57cf 61 // This event was in the past:
mbed_official 80:bdf1132a57cf 62 us_ticker_irq_handler();
mbed_official 80:bdf1132a57cf 63 return;
mbed_official 80:bdf1132a57cf 64 }
mbed_official 80:bdf1132a57cf 65 // enable interrupt
mbed_official 80:bdf1132a57cf 66 US_TICKER_TIMER1->TimerControl = 0x0; // disable timer
mbed_official 80:bdf1132a57cf 67 US_TICKER_TIMER1->TimerControl = 0x62; // enable interrupt and set to 32 bit counter and set to periodic mode
mbed_official 80:bdf1132a57cf 68 US_TICKER_TIMER1->TimerLoad = (delta)*24; //initialise the timer value
mbed_official 80:bdf1132a57cf 69 US_TICKER_TIMER1->TimerControl |= 0x80; //enable timer
mbed_official 80:bdf1132a57cf 70 }
mbed_official 80:bdf1132a57cf 71
AnnaBridge 174:b96e65c34a4d 72 void us_ticker_fire_interrupt(void)
AnnaBridge 174:b96e65c34a4d 73 {
AnnaBridge 174:b96e65c34a4d 74 NVIC_SetPendingIRQ(US_TICKER_TIMER_IRQn);
AnnaBridge 174:b96e65c34a4d 75 }
AnnaBridge 174:b96e65c34a4d 76
mbed_official 80:bdf1132a57cf 77 void us_ticker_disable_interrupt(void) {
mbed_official 80:bdf1132a57cf 78
mbed_official 80:bdf1132a57cf 79 US_TICKER_TIMER1->TimerControl &= 0xDF;
mbed_official 80:bdf1132a57cf 80 US_TICKER_TIMER2->TimerControl &= 0xDF;
mbed_official 80:bdf1132a57cf 81
mbed_official 80:bdf1132a57cf 82 }
mbed_official 80:bdf1132a57cf 83
mbed_official 80:bdf1132a57cf 84 void us_ticker_clear_interrupt(void) {
mbed_official 80:bdf1132a57cf 85
mbed_official 80:bdf1132a57cf 86 US_TICKER_TIMER1->TimerIntClr = 0x1;
mbed_official 80:bdf1132a57cf 87 US_TICKER_TIMER2->TimerIntClr = 0x1;
mbed_official 80:bdf1132a57cf 88
mbed_official 80:bdf1132a57cf 89 }