mirror of
https://github.com/cwyark/ameba-sdk-gcc-make.git
synced 2024-11-24 15:04:19 +00:00
103 lines
3 KiB
C
Executable file
103 lines
3 KiB
C
Executable file
/* mbed Microcontroller Library
|
|
*******************************************************************************
|
|
* Copyright (c) 2014, Realtek Semiconductor Corp.
|
|
* All rights reserved.
|
|
*
|
|
* This module is a confidential and proprietary property of RealTek and
|
|
* possession or use of this module requires written permission of RealTek.
|
|
*******************************************************************************
|
|
*/
|
|
#include "objects.h"
|
|
#include <stddef.h>
|
|
#include "us_ticker_api.h"
|
|
#include "PeripheralNames.h"
|
|
|
|
#define SYS_TIM_ID 1 // the G-Timer ID for System
|
|
#define APP_TIM_ID 6 // the G-Timer ID for Application
|
|
|
|
static int us_ticker_inited = 0;
|
|
static TIMER_ADAPTER TimerAdapter;
|
|
|
|
extern HAL_TIMER_OP HalTimerOp;
|
|
|
|
VOID _us_ticker_irq_handler(IN VOID *Data)
|
|
{
|
|
us_ticker_irq_handler();
|
|
}
|
|
|
|
void us_ticker_init(void)
|
|
{
|
|
|
|
if (us_ticker_inited) return;
|
|
us_ticker_inited = 1;
|
|
|
|
// Initial a G-Timer
|
|
TimerAdapter.IrqDis = 1; // Disable Irq
|
|
TimerAdapter.IrqHandle.IrqFun = (IRQ_FUN) _us_ticker_irq_handler;
|
|
TimerAdapter.IrqHandle.IrqNum = TIMER2_7_IRQ;
|
|
TimerAdapter.IrqHandle.Priority = 0x20;
|
|
TimerAdapter.IrqHandle.Data = (u32)NULL;
|
|
TimerAdapter.TimerId = APP_TIM_ID;
|
|
TimerAdapter.TimerIrqPriority = 0;
|
|
TimerAdapter.TimerLoadValueUs = 1;
|
|
TimerAdapter.TimerMode = FREE_RUN_MODE; // Countdown Free Run
|
|
|
|
HalTimerOp.HalTimerInit((VOID*) &TimerAdapter);
|
|
|
|
DBG_TIMER_INFO("%s: Timer_Id=%d\n", __FUNCTION__, APP_TIM_ID);
|
|
}
|
|
|
|
|
|
uint32_t us_ticker_read()
|
|
{
|
|
uint32_t tick_cnt;
|
|
uint32_t ticks_125ms;
|
|
uint32_t ticks_remain;
|
|
uint64_t us_tick;
|
|
|
|
//1 Our G-timer resolution is ~31 us (1/32K), and is a countdown timer
|
|
// if (!us_ticker_inited) {
|
|
// us_ticker_init();
|
|
// }
|
|
tick_cnt = HalTimerOp.HalTimerReadCount(SYS_TIM_ID);
|
|
tick_cnt = 0xffffffff - tick_cnt; // it's a down counter
|
|
ticks_125ms = tick_cnt/(GTIMER_CLK_HZ/8);
|
|
ticks_remain = tick_cnt - (ticks_125ms*(GTIMER_CLK_HZ/8));
|
|
us_tick = ticks_125ms * 125000;
|
|
us_tick += (ticks_remain * 1000000)/GTIMER_CLK_HZ;
|
|
return ((uint32_t)us_tick);
|
|
}
|
|
|
|
void us_ticker_set_interrupt(timestamp_t timestamp)
|
|
{
|
|
uint32_t cur_time_us;
|
|
uint32_t time_def;
|
|
|
|
cur_time_us = us_ticker_read();
|
|
if ((uint32_t)timestamp >= cur_time_us) {
|
|
time_def = (uint32_t)timestamp - cur_time_us;
|
|
}
|
|
else {
|
|
time_def = 0xffffffff - cur_time_us + (uint32_t)timestamp;
|
|
}
|
|
|
|
if (time_def < TIMER_TICK_US) {
|
|
time_def = TIMER_TICK_US; // at least 1 tick
|
|
}
|
|
|
|
TimerAdapter.IrqDis = 0; // Enable Irq
|
|
TimerAdapter.TimerLoadValueUs = time_def;
|
|
TimerAdapter.TimerMode = USER_DEFINED; // Countdown Free Run
|
|
|
|
HalTimerOp.HalTimerInit((VOID*) &TimerAdapter);
|
|
}
|
|
|
|
void us_ticker_disable_interrupt(void)
|
|
{
|
|
HalTimerOp.HalTimerDis((u32)TimerAdapter.TimerId);
|
|
}
|
|
|
|
void us_ticker_clear_interrupt(void)
|
|
{
|
|
HalTimerOp.HalTimerIrqClear((u32)TimerAdapter.TimerId);
|
|
}
|