test
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targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_K66F/us_ticker.c@175:b96e65c34a4d, 2017-10-02 (annotated)
- Committer:
- AnnaBridge
- Date:
- Mon Oct 02 15:33:19 2017 +0100
- Revision:
- 175:b96e65c34a4d
- Parent:
- 154:37f96f9d4de2
- Child:
- 178:d650f5d4c87a
This updates the lib to the mbed lib v 152
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
<> | 154:37f96f9d4de2 | 1 | /* mbed Microcontroller Library |
<> | 154:37f96f9d4de2 | 2 | * Copyright (c) 2006-2013 ARM Limited |
<> | 154:37f96f9d4de2 | 3 | * |
<> | 154:37f96f9d4de2 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
<> | 154:37f96f9d4de2 | 5 | * you may not use this file except in compliance with the License. |
<> | 154:37f96f9d4de2 | 6 | * You may obtain a copy of the License at |
<> | 154:37f96f9d4de2 | 7 | * |
<> | 154:37f96f9d4de2 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
<> | 154:37f96f9d4de2 | 9 | * |
<> | 154:37f96f9d4de2 | 10 | * Unless required by applicable law or agreed to in writing, software |
<> | 154:37f96f9d4de2 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
<> | 154:37f96f9d4de2 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
<> | 154:37f96f9d4de2 | 13 | * See the License for the specific language governing permissions and |
<> | 154:37f96f9d4de2 | 14 | * limitations under the License. |
<> | 154:37f96f9d4de2 | 15 | */ |
<> | 154:37f96f9d4de2 | 16 | #include <stddef.h> |
<> | 154:37f96f9d4de2 | 17 | #include "us_ticker_api.h" |
<> | 154:37f96f9d4de2 | 18 | #include "PeripheralNames.h" |
<> | 154:37f96f9d4de2 | 19 | #include "fsl_pit.h" |
<> | 154:37f96f9d4de2 | 20 | #include "fsl_clock_config.h" |
<> | 154:37f96f9d4de2 | 21 | |
<> | 154:37f96f9d4de2 | 22 | static int us_ticker_inited = 0; |
<> | 154:37f96f9d4de2 | 23 | |
<> | 154:37f96f9d4de2 | 24 | void us_ticker_init(void) |
<> | 154:37f96f9d4de2 | 25 | { |
<> | 154:37f96f9d4de2 | 26 | if (us_ticker_inited) { |
<> | 154:37f96f9d4de2 | 27 | return; |
<> | 154:37f96f9d4de2 | 28 | } |
<> | 154:37f96f9d4de2 | 29 | us_ticker_inited = 1; |
<> | 154:37f96f9d4de2 | 30 | //Common for ticker/timer |
<> | 154:37f96f9d4de2 | 31 | uint32_t busClock; |
<> | 154:37f96f9d4de2 | 32 | // Structure to initialize PIT |
<> | 154:37f96f9d4de2 | 33 | pit_config_t pitConfig; |
<> | 154:37f96f9d4de2 | 34 | |
<> | 154:37f96f9d4de2 | 35 | PIT_GetDefaultConfig(&pitConfig); |
<> | 154:37f96f9d4de2 | 36 | PIT_Init(PIT, &pitConfig); |
<> | 154:37f96f9d4de2 | 37 | |
<> | 154:37f96f9d4de2 | 38 | busClock = CLOCK_GetFreq(kCLOCK_BusClk); |
<> | 154:37f96f9d4de2 | 39 | |
<> | 154:37f96f9d4de2 | 40 | //Timer |
<> | 154:37f96f9d4de2 | 41 | PIT_SetTimerPeriod(PIT, kPIT_Chnl_0, busClock / 1000000 - 1); |
<> | 154:37f96f9d4de2 | 42 | PIT_SetTimerPeriod(PIT, kPIT_Chnl_1, 0xFFFFFFFF); |
<> | 154:37f96f9d4de2 | 43 | PIT_SetTimerChainMode(PIT, kPIT_Chnl_1, true); |
<> | 154:37f96f9d4de2 | 44 | PIT_StartTimer(PIT, kPIT_Chnl_0); |
<> | 154:37f96f9d4de2 | 45 | PIT_StartTimer(PIT, kPIT_Chnl_1); |
<> | 154:37f96f9d4de2 | 46 | |
<> | 154:37f96f9d4de2 | 47 | //Ticker |
<> | 154:37f96f9d4de2 | 48 | PIT_SetTimerPeriod(PIT, kPIT_Chnl_2, busClock / 1000000 - 1); |
<> | 154:37f96f9d4de2 | 49 | PIT_SetTimerChainMode(PIT, kPIT_Chnl_3, true); |
<> | 154:37f96f9d4de2 | 50 | NVIC_SetVector(PIT3_IRQn, (uint32_t)us_ticker_irq_handler); |
<> | 154:37f96f9d4de2 | 51 | NVIC_EnableIRQ(PIT3_IRQn); |
<> | 154:37f96f9d4de2 | 52 | } |
<> | 154:37f96f9d4de2 | 53 | |
<> | 154:37f96f9d4de2 | 54 | |
<> | 154:37f96f9d4de2 | 55 | uint32_t us_ticker_read() |
<> | 154:37f96f9d4de2 | 56 | { |
<> | 154:37f96f9d4de2 | 57 | if (!us_ticker_inited) { |
<> | 154:37f96f9d4de2 | 58 | us_ticker_init(); |
<> | 154:37f96f9d4de2 | 59 | } |
<> | 154:37f96f9d4de2 | 60 | |
<> | 154:37f96f9d4de2 | 61 | return ~(PIT_GetCurrentTimerCount(PIT, kPIT_Chnl_1)); |
<> | 154:37f96f9d4de2 | 62 | } |
<> | 154:37f96f9d4de2 | 63 | |
<> | 154:37f96f9d4de2 | 64 | void us_ticker_disable_interrupt(void) |
<> | 154:37f96f9d4de2 | 65 | { |
<> | 154:37f96f9d4de2 | 66 | PIT_DisableInterrupts(PIT, kPIT_Chnl_3, kPIT_TimerInterruptEnable); |
<> | 154:37f96f9d4de2 | 67 | } |
<> | 154:37f96f9d4de2 | 68 | |
<> | 154:37f96f9d4de2 | 69 | void us_ticker_clear_interrupt(void) |
<> | 154:37f96f9d4de2 | 70 | { |
<> | 154:37f96f9d4de2 | 71 | PIT_ClearStatusFlags(PIT, kPIT_Chnl_3, PIT_TFLG_TIF_MASK); |
<> | 154:37f96f9d4de2 | 72 | } |
<> | 154:37f96f9d4de2 | 73 | |
<> | 154:37f96f9d4de2 | 74 | void us_ticker_set_interrupt(timestamp_t timestamp) |
<> | 154:37f96f9d4de2 | 75 | { |
AnnaBridge | 175:b96e65c34a4d | 76 | uint32_t delta = timestamp - us_ticker_read(); |
<> | 154:37f96f9d4de2 | 77 | PIT_StopTimer(PIT, kPIT_Chnl_3); |
<> | 154:37f96f9d4de2 | 78 | PIT_StopTimer(PIT, kPIT_Chnl_2); |
<> | 154:37f96f9d4de2 | 79 | PIT_SetTimerPeriod(PIT, kPIT_Chnl_3, (uint32_t)delta); |
<> | 154:37f96f9d4de2 | 80 | PIT_EnableInterrupts(PIT, kPIT_Chnl_3, kPIT_TimerInterruptEnable); |
<> | 154:37f96f9d4de2 | 81 | PIT_StartTimer(PIT, kPIT_Chnl_3); |
<> | 154:37f96f9d4de2 | 82 | PIT_StartTimer(PIT, kPIT_Chnl_2); |
<> | 154:37f96f9d4de2 | 83 | } |
AnnaBridge | 175:b96e65c34a4d | 84 | |
AnnaBridge | 175:b96e65c34a4d | 85 | void us_ticker_fire_interrupt(void) |
AnnaBridge | 175:b96e65c34a4d | 86 | { |
AnnaBridge | 175:b96e65c34a4d | 87 | NVIC_SetPendingIRQ(PIT3_IRQn); |
AnnaBridge | 175:b96e65c34a4d | 88 | } |