MacroRat / MouseCode

Mouse code for the MacroRat

Dependencies:   ITG3200 QEI

mbed-dev/targets/TARGET_NORDIC/TARGET_NRF5/nordic_critical.c@46:b156ef445742, 2017-06-03 (annotated)

Committer:
sahilmgandhi
Date:
Sat Jun 03 00:22:44 2017 +0000
Revision:
46:b156ef445742
Parent:
18:6a4db94011d3 
Final code for internal battlebot competition.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sahilmgandhi 18:6a4db94011d3 1 /*
sahilmgandhi 18:6a4db94011d3 2 * Copyright (c) 2015-2016, ARM Limited, All Rights Reserved
sahilmgandhi 18:6a4db94011d3 3 * SPDX-License-Identifier: Apache-2.0
sahilmgandhi 18:6a4db94011d3 4 *
sahilmgandhi 18:6a4db94011d3 5 * Licensed under the Apache License, Version 2.0 (the "License"); you may
sahilmgandhi 18:6a4db94011d3 6 * not use this file except in compliance with the License.
sahilmgandhi 18:6a4db94011d3 7 * You may obtain a copy of the License at
sahilmgandhi 18:6a4db94011d3 8 *
sahilmgandhi 18:6a4db94011d3 9 * http://www.apache.org/licenses/LICENSE-2.0
sahilmgandhi 18:6a4db94011d3 10 *
sahilmgandhi 18:6a4db94011d3 11 * Unless required by applicable law or agreed to in writing, software
sahilmgandhi 18:6a4db94011d3 12 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
sahilmgandhi 18:6a4db94011d3 13 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
sahilmgandhi 18:6a4db94011d3 14 * See the License for the specific language governing permissions and
sahilmgandhi 18:6a4db94011d3 15 * limitations under the License.
sahilmgandhi 18:6a4db94011d3 16 */
sahilmgandhi 18:6a4db94011d3 17
sahilmgandhi 18:6a4db94011d3 18 #include <stdint.h> // uint32_t, UINT32_MAX
sahilmgandhi 18:6a4db94011d3 19 #include <assert.h> // uint32_t, UINT32_MAX
sahilmgandhi 18:6a4db94011d3 20 #include "cmsis.h"
sahilmgandhi 18:6a4db94011d3 21 #include "nrf_soc.h"
sahilmgandhi 18:6a4db94011d3 22 #include "nrf_sdm.h"
sahilmgandhi 18:6a4db94011d3 23 #include "nrf_nvic.h"
sahilmgandhi 18:6a4db94011d3 24
sahilmgandhi 18:6a4db94011d3 25 static uint8_t _sd_state = 0;
sahilmgandhi 18:6a4db94011d3 26 static volatile uint32_t _entry_count = 0;
sahilmgandhi 18:6a4db94011d3 27
sahilmgandhi 18:6a4db94011d3 28 void core_util_critical_section_enter()
sahilmgandhi 18:6a4db94011d3 29 {
sahilmgandhi 18:6a4db94011d3 30 // if a critical section has already been entered, just update the counter
sahilmgandhi 18:6a4db94011d3 31 if (_entry_count) {
sahilmgandhi 18:6a4db94011d3 32 ++_entry_count;
sahilmgandhi 18:6a4db94011d3 33 return;
sahilmgandhi 18:6a4db94011d3 34 }
sahilmgandhi 18:6a4db94011d3 35
sahilmgandhi 18:6a4db94011d3 36 // in this path, a critical section has never been entered
sahilmgandhi 18:6a4db94011d3 37 // routine of SD V11 work even if the softdevice is not active
sahilmgandhi 18:6a4db94011d3 38 sd_nvic_critical_region_enter(&_sd_state);
sahilmgandhi 18:6a4db94011d3 39
sahilmgandhi 18:6a4db94011d3 40 assert(_entry_count == 0); // entry count should always be equal to 0 at this point
sahilmgandhi 18:6a4db94011d3 41 ++_entry_count;
sahilmgandhi 18:6a4db94011d3 42 }
sahilmgandhi 18:6a4db94011d3 43
sahilmgandhi 18:6a4db94011d3 44 void core_util_critical_section_exit()
sahilmgandhi 18:6a4db94011d3 45 {
sahilmgandhi 18:6a4db94011d3 46 assert(_entry_count > 0);
sahilmgandhi 18:6a4db94011d3 47 --_entry_count;
sahilmgandhi 18:6a4db94011d3 48
sahilmgandhi 18:6a4db94011d3 49 // If their is other segments which have entered the critical section, just leave
sahilmgandhi 18:6a4db94011d3 50 if (_entry_count) {
sahilmgandhi 18:6a4db94011d3 51 return;
sahilmgandhi 18:6a4db94011d3 52 }
sahilmgandhi 18:6a4db94011d3 53
sahilmgandhi 18:6a4db94011d3 54 // This is the last segment of the critical section, state should be restored as before entering
sahilmgandhi 18:6a4db94011d3 55 // the critical section
sahilmgandhi 18:6a4db94011d3 56 sd_nvic_critical_region_exit(_sd_state);
sahilmgandhi 18:6a4db94011d3 57 }