mirror of https://github.com/ARMmbed/mbed-os.git
83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/* mbed Microcontroller Library
|
|
* Copyright (c) 2006-2018 ARM Limited
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#if DEVICE_USTICKER
|
|
|
|
#include "hal/us_ticker_api.h"
|
|
#include "us_ticker_data.h"
|
|
|
|
// This variable is set to 1 at the of mbed_sdk_init function.
|
|
// The ticker_read_us function must not be called until the mbed_sdk_init is terminated.
|
|
extern int mbed_sdk_inited;
|
|
|
|
// Defined in us_ticker.c
|
|
void init_16bit_timer(void);
|
|
void init_32bit_timer(void);
|
|
|
|
#if TIM_MST_BIT_WIDTH == 16
|
|
// Variables also reset in us_ticker_init()
|
|
uint32_t prev_time = 0;
|
|
uint32_t elapsed_time = 0;
|
|
#endif
|
|
|
|
// Overwrite default HAL functions defined as "weak"
|
|
|
|
HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
|
|
{
|
|
#if TIM_MST_BIT_WIDTH == 16
|
|
init_16bit_timer();
|
|
#else
|
|
init_32bit_timer();
|
|
#endif
|
|
return HAL_OK;
|
|
}
|
|
|
|
uint32_t HAL_GetTick()
|
|
{
|
|
#if TIM_MST_BIT_WIDTH == 16
|
|
uint32_t new_time;
|
|
if (mbed_sdk_inited) {
|
|
// Apply the latest time recorded just before the sdk is inited
|
|
new_time = ticker_read_us(get_us_ticker_data()) + prev_time;
|
|
prev_time = 0; // Use this time only once
|
|
return (new_time / 1000);
|
|
} else {
|
|
new_time = us_ticker_read();
|
|
elapsed_time += (new_time - prev_time) & 0xFFFF; // Only use the lower 16 bits
|
|
prev_time = new_time;
|
|
return (elapsed_time / 1000);
|
|
}
|
|
#else // 32-bit timer
|
|
if (mbed_sdk_inited) {
|
|
return (ticker_read_us(get_us_ticker_data()) / 1000);
|
|
} else {
|
|
return (us_ticker_read() / 1000);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void HAL_SuspendTick(void)
|
|
{
|
|
// Do nothing
|
|
}
|
|
|
|
void HAL_ResumeTick(void)
|
|
{
|
|
// Do nothing
|
|
}
|
|
|
|
#endif /* DEVICE_USTICKER */
|