Mouse code for the MacroRat
mbed-dev/targets/TARGET_ARM_SSG/TARGET_IOTSS/us_ticker.c@18:6a4db94011d3, 2017-05-14 (annotated)
- Committer:
- sahilmgandhi
- Date:
- Sun May 14 23:18:57 2017 +0000
- Revision:
- 18:6a4db94011d3
Publishing again
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
sahilmgandhi | 18:6a4db94011d3 | 1 | /* mbed Microcontroller Library |
sahilmgandhi | 18:6a4db94011d3 | 2 | * Copyright (c) 2006-2015 ARM Limited |
sahilmgandhi | 18:6a4db94011d3 | 3 | * |
sahilmgandhi | 18:6a4db94011d3 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
sahilmgandhi | 18:6a4db94011d3 | 5 | * you may not use this file except in compliance with the License. |
sahilmgandhi | 18:6a4db94011d3 | 6 | * You may obtain a copy of the License at |
sahilmgandhi | 18:6a4db94011d3 | 7 | * |
sahilmgandhi | 18:6a4db94011d3 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
sahilmgandhi | 18:6a4db94011d3 | 9 | * |
sahilmgandhi | 18:6a4db94011d3 | 10 | * Unless required by applicable law or agreed to in writing, software |
sahilmgandhi | 18:6a4db94011d3 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
sahilmgandhi | 18:6a4db94011d3 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
sahilmgandhi | 18:6a4db94011d3 | 13 | * See the License for the specific language governing permissions and |
sahilmgandhi | 18:6a4db94011d3 | 14 | * limitations under the License. |
sahilmgandhi | 18:6a4db94011d3 | 15 | */ |
sahilmgandhi | 18:6a4db94011d3 | 16 | #include <stddef.h> |
sahilmgandhi | 18:6a4db94011d3 | 17 | #include "us_ticker_api.h" |
sahilmgandhi | 18:6a4db94011d3 | 18 | #include "PeripheralNames.h" |
sahilmgandhi | 18:6a4db94011d3 | 19 | |
sahilmgandhi | 18:6a4db94011d3 | 20 | #define US_TICKER_TIMER1 CMSDK_DUALTIMER1 |
sahilmgandhi | 18:6a4db94011d3 | 21 | #define US_TICKER_TIMER2 CMSDK_DUALTIMER2 |
sahilmgandhi | 18:6a4db94011d3 | 22 | #define US_TICKER_TIMER_IRQn DUALTIMER_IRQn |
sahilmgandhi | 18:6a4db94011d3 | 23 | |
sahilmgandhi | 18:6a4db94011d3 | 24 | int us_ticker_inited = 0; |
sahilmgandhi | 18:6a4db94011d3 | 25 | |
sahilmgandhi | 18:6a4db94011d3 | 26 | void us_ticker_init(void) { |
sahilmgandhi | 18:6a4db94011d3 | 27 | if (us_ticker_inited) return; |
sahilmgandhi | 18:6a4db94011d3 | 28 | us_ticker_inited = 1; |
sahilmgandhi | 18:6a4db94011d3 | 29 | |
sahilmgandhi | 18:6a4db94011d3 | 30 | US_TICKER_TIMER1->TimerControl = 0x0; // disable timer |
sahilmgandhi | 18:6a4db94011d3 | 31 | US_TICKER_TIMER2->TimerControl = 0x00; // disable timer |
sahilmgandhi | 18:6a4db94011d3 | 32 | US_TICKER_TIMER1->TimerLoad = 0xFFFFFFFF; |
sahilmgandhi | 18:6a4db94011d3 | 33 | US_TICKER_TIMER2->TimerLoad = 0xFFFFFFFF; |
sahilmgandhi | 18:6a4db94011d3 | 34 | |
sahilmgandhi | 18:6a4db94011d3 | 35 | US_TICKER_TIMER1->TimerControl = 0x62; // enable interrupt and set to 32 bit counter and set to periodic mode |
sahilmgandhi | 18:6a4db94011d3 | 36 | US_TICKER_TIMER2->TimerControl = 0x42; // enable interrupt and set to 32 bit counter |
sahilmgandhi | 18:6a4db94011d3 | 37 | |
sahilmgandhi | 18:6a4db94011d3 | 38 | US_TICKER_TIMER1->TimerControl |= 0x80; // enable counter |
sahilmgandhi | 18:6a4db94011d3 | 39 | US_TICKER_TIMER2->TimerControl |= 0x80; // enable counter |
sahilmgandhi | 18:6a4db94011d3 | 40 | |
sahilmgandhi | 18:6a4db94011d3 | 41 | NVIC_SetVector(US_TICKER_TIMER_IRQn, (uint32_t)us_ticker_irq_handler); |
sahilmgandhi | 18:6a4db94011d3 | 42 | NVIC_EnableIRQ(US_TICKER_TIMER_IRQn); |
sahilmgandhi | 18:6a4db94011d3 | 43 | } |
sahilmgandhi | 18:6a4db94011d3 | 44 | |
sahilmgandhi | 18:6a4db94011d3 | 45 | uint32_t us_ticker_read() { |
sahilmgandhi | 18:6a4db94011d3 | 46 | uint32_t return_value = 0; |
sahilmgandhi | 18:6a4db94011d3 | 47 | |
sahilmgandhi | 18:6a4db94011d3 | 48 | if (!us_ticker_inited) |
sahilmgandhi | 18:6a4db94011d3 | 49 | us_ticker_init(); |
sahilmgandhi | 18:6a4db94011d3 | 50 | return_value = ((~US_TICKER_TIMER2->TimerValue)/24); |
sahilmgandhi | 18:6a4db94011d3 | 51 | return return_value; |
sahilmgandhi | 18:6a4db94011d3 | 52 | } |
sahilmgandhi | 18:6a4db94011d3 | 53 | |
sahilmgandhi | 18:6a4db94011d3 | 54 | void us_ticker_set_interrupt(timestamp_t timestamp) { |
sahilmgandhi | 18:6a4db94011d3 | 55 | int delta = 0; |
sahilmgandhi | 18:6a4db94011d3 | 56 | |
sahilmgandhi | 18:6a4db94011d3 | 57 | if (!us_ticker_inited) |
sahilmgandhi | 18:6a4db94011d3 | 58 | us_ticker_init(); |
sahilmgandhi | 18:6a4db94011d3 | 59 | delta = (int)(timestamp - us_ticker_read()); |
sahilmgandhi | 18:6a4db94011d3 | 60 | if (delta <= 0) { |
sahilmgandhi | 18:6a4db94011d3 | 61 | // This event was in the past: |
sahilmgandhi | 18:6a4db94011d3 | 62 | us_ticker_irq_handler(); |
sahilmgandhi | 18:6a4db94011d3 | 63 | return; |
sahilmgandhi | 18:6a4db94011d3 | 64 | } |
sahilmgandhi | 18:6a4db94011d3 | 65 | // enable interrupt |
sahilmgandhi | 18:6a4db94011d3 | 66 | US_TICKER_TIMER1->TimerControl = 0x0; // disable timer |
sahilmgandhi | 18:6a4db94011d3 | 67 | US_TICKER_TIMER1->TimerControl = 0x62; // enable interrupt and set to 32 bit counter and set to periodic mode |
sahilmgandhi | 18:6a4db94011d3 | 68 | US_TICKER_TIMER1->TimerLoad = (delta)*24; //initialise the timer value |
sahilmgandhi | 18:6a4db94011d3 | 69 | US_TICKER_TIMER1->TimerControl |= 0x80; //enable timer |
sahilmgandhi | 18:6a4db94011d3 | 70 | } |
sahilmgandhi | 18:6a4db94011d3 | 71 | |
sahilmgandhi | 18:6a4db94011d3 | 72 | void us_ticker_disable_interrupt(void) { |
sahilmgandhi | 18:6a4db94011d3 | 73 | |
sahilmgandhi | 18:6a4db94011d3 | 74 | US_TICKER_TIMER1->TimerControl &= 0xDF; |
sahilmgandhi | 18:6a4db94011d3 | 75 | US_TICKER_TIMER2->TimerControl &= 0xDF; |
sahilmgandhi | 18:6a4db94011d3 | 76 | |
sahilmgandhi | 18:6a4db94011d3 | 77 | } |
sahilmgandhi | 18:6a4db94011d3 | 78 | |
sahilmgandhi | 18:6a4db94011d3 | 79 | void us_ticker_clear_interrupt(void) { |
sahilmgandhi | 18:6a4db94011d3 | 80 | |
sahilmgandhi | 18:6a4db94011d3 | 81 | US_TICKER_TIMER1->TimerIntClr = 0x1; |
sahilmgandhi | 18:6a4db94011d3 | 82 | US_TICKER_TIMER2->TimerIntClr = 0x1; |
sahilmgandhi | 18:6a4db94011d3 | 83 | |
sahilmgandhi | 18:6a4db94011d3 | 84 | } |