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mbed library sources

Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_Freescale/TARGET_KPSDK_MCUS/us_ticker.c@621:9c82b0f79f3d, 2015-09-11 (annotated)

Committer:
mbed_official
Date:
Fri Sep 11 09:30:09 2015 +0100
Revision:
621:9c82b0f79f3d
Parent:
329:e2a9f2c7ad2b 
Synchronized with git revision 6c1d63e069ab9bd86de92e8296ca783681257538



Full URL: https://github.com/mbedmicro/mbed/commit/6c1d63e069ab9bd86de92e8296ca783681257538/



ignore target files not supported by the yotta module

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 324:406fd2029f23 1 /* mbed Microcontroller Library
mbed_official 324:406fd2029f23 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 324:406fd2029f23 3 *
mbed_official 324:406fd2029f23 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 324:406fd2029f23 5 * you may not use this file except in compliance with the License.
mbed_official 324:406fd2029f23 6 * You may obtain a copy of the License at
mbed_official 324:406fd2029f23 7 *
mbed_official 324:406fd2029f23 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 324:406fd2029f23 9 *
mbed_official 324:406fd2029f23 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 324:406fd2029f23 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 324:406fd2029f23 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 324:406fd2029f23 13 * See the License for the specific language governing permissions and
mbed_official 324:406fd2029f23 14 * limitations under the License.
mbed_official 324:406fd2029f23 15 */
mbed_official 324:406fd2029f23 16 #include <stddef.h>
mbed_official 324:406fd2029f23 17 #include "us_ticker_api.h"
mbed_official 324:406fd2029f23 18 #include "PeripheralNames.h"
mbed_official 324:406fd2029f23 19 #include "fsl_pit_hal.h"
mbed_official 324:406fd2029f23 20 #include "fsl_sim_hal.h"
mbed_official 324:406fd2029f23 21 #include "fsl_clock_manager.h"
mbed_official 324:406fd2029f23 22
mbed_official 324:406fd2029f23 23 static int us_ticker_inited = 0;
mbed_official 324:406fd2029f23 24
mbed_official 324:406fd2029f23 25 void us_ticker_init(void) {
mbed_official 324:406fd2029f23 26 if (us_ticker_inited) {
mbed_official 324:406fd2029f23 27 return;
mbed_official 324:406fd2029f23 28 }
mbed_official 324:406fd2029f23 29 us_ticker_inited = 1;
mbed_official 329:e2a9f2c7ad2b 30
mbed_official 329:e2a9f2c7ad2b 31 //Common for ticker/timer
mbed_official 329:e2a9f2c7ad2b 32 uint32_t busClock;
mbed_official 329:e2a9f2c7ad2b 33 CLOCK_SYS_EnablePitClock(0);
mbed_official 329:e2a9f2c7ad2b 34 PIT_HAL_Enable(PIT_BASE);
mbed_official 329:e2a9f2c7ad2b 35 CLOCK_SYS_GetFreq(kBusClock, &busClock);
mbed_official 329:e2a9f2c7ad2b 36
mbed_official 329:e2a9f2c7ad2b 37 //Timer
mbed_official 329:e2a9f2c7ad2b 38 PIT_HAL_SetTimerPeriodByCount(PIT_BASE, 0, busClock / 1000000 - 1);
mbed_official 329:e2a9f2c7ad2b 39 PIT_HAL_SetTimerPeriodByCount(PIT_BASE, 1, 0xFFFFFFFF);
mbed_official 329:e2a9f2c7ad2b 40 PIT_HAL_SetTimerChainCmd(PIT_BASE, 1, true);
mbed_official 329:e2a9f2c7ad2b 41 PIT_HAL_StartTimer(PIT_BASE, 0);
mbed_official 329:e2a9f2c7ad2b 42 PIT_HAL_StartTimer(PIT_BASE, 1);
mbed_official 329:e2a9f2c7ad2b 43
mbed_official 329:e2a9f2c7ad2b 44 //Ticker
mbed_official 329:e2a9f2c7ad2b 45 PIT_HAL_SetTimerPeriodByCount(PIT_BASE, 2, busClock / 1000000 - 1);
mbed_official 329:e2a9f2c7ad2b 46 PIT_HAL_SetTimerChainCmd(PIT_BASE, 3, true);
mbed_official 329:e2a9f2c7ad2b 47 NVIC_SetVector(PIT3_IRQn, (uint32_t)us_ticker_irq_handler);
mbed_official 329:e2a9f2c7ad2b 48 NVIC_EnableIRQ(PIT3_IRQn);
mbed_official 324:406fd2029f23 49 }
mbed_official 324:406fd2029f23 50
mbed_official 324:406fd2029f23 51
mbed_official 324:406fd2029f23 52 uint32_t us_ticker_read() {
mbed_official 324:406fd2029f23 53 if (!us_ticker_inited) {
mbed_official 324:406fd2029f23 54 us_ticker_init();
mbed_official 324:406fd2029f23 55 }
mbed_official 324:406fd2029f23 56
mbed_official 324:406fd2029f23 57 return ~(PIT_HAL_ReadTimerCount(PIT_BASE, 1));
mbed_official 324:406fd2029f23 58 }
mbed_official 324:406fd2029f23 59
mbed_official 324:406fd2029f23 60 void us_ticker_disable_interrupt(void) {
mbed_official 329:e2a9f2c7ad2b 61 PIT_HAL_SetIntCmd(PIT_BASE, 3, false);
mbed_official 324:406fd2029f23 62 }
mbed_official 324:406fd2029f23 63
mbed_official 324:406fd2029f23 64 void us_ticker_clear_interrupt(void) {
mbed_official 329:e2a9f2c7ad2b 65 PIT_HAL_ClearIntFlag(PIT_BASE, 3);
mbed_official 324:406fd2029f23 66 }
mbed_official 324:406fd2029f23 67
mbed_official 324:406fd2029f23 68 void us_ticker_set_interrupt(timestamp_t timestamp) {
mbed_official 324:406fd2029f23 69 int delta = (int)(timestamp - us_ticker_read());
mbed_official 324:406fd2029f23 70 if (delta <= 0) {
mbed_official 324:406fd2029f23 71 // This event was in the past:
mbed_official 324:406fd2029f23 72 us_ticker_irq_handler();
mbed_official 324:406fd2029f23 73 return;
mbed_official 324:406fd2029f23 74 }
mbed_official 329:e2a9f2c7ad2b 75
mbed_official 329:e2a9f2c7ad2b 76 PIT_HAL_StopTimer(PIT_BASE, 3);
mbed_official 329:e2a9f2c7ad2b 77 PIT_HAL_StopTimer(PIT_BASE, 2);
mbed_official 329:e2a9f2c7ad2b 78 PIT_HAL_SetTimerPeriodByCount(PIT_BASE, 3, (uint32_t)delta);
mbed_official 329:e2a9f2c7ad2b 79 PIT_HAL_SetIntCmd(PIT_BASE, 3, true);
mbed_official 329:e2a9f2c7ad2b 80 PIT_HAL_StartTimer(PIT_BASE, 3);
mbed_official 329:e2a9f2c7ad2b 81 PIT_HAL_StartTimer(PIT_BASE, 2);
mbed_official 324:406fd2029f23 82 }