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简化操作接口

This commit is contained in:
heyuanjie87 2015-09-06 15:05:47 +08:00
parent 47b3a4d3cc
commit d19f424909
4 changed files with 82 additions and 144 deletions
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55
bsp/stm32f40x/drivers/drv_hwtimer.c
View File

@ -1,5 +1,5 @@
/*
* File : gpio.c
* File : drv_hwtimer.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2015, RT-Thread Development Team
*
@ -31,35 +31,34 @@ static void NVIC_Configuration(void)
NVIC_Init(&NVIC_InitStructure);
}
static void timer_init(rt_hwtimer_t *timer)
static void timer_init(rt_hwtimer_t *timer, rt_uint32_t state)
{
TIM_TypeDef *tim;
tim = (TIM_TypeDef *)timer->parent.user_data;
TIM_DeInit(tim);
NVIC_Configuration();
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_CounterModeConfig(tim, TIM_CounterMode_Up);
if (state == 1)
{
NVIC_Configuration();
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_CounterModeConfig(tim, TIM_CounterMode_Up);
}
}
static void timer_deinit(rt_hwtimer_t *timer)
{
TIM_TypeDef *tim;
tim = (TIM_TypeDef *)timer->parent.user_data;
TIM_DeInit(tim);
}
static void timer_start(rt_hwtimer_t *timer, rt_hwtimer_mode_t opmode)
static rt_err_t timer_start(rt_hwtimer_t *timer, rt_uint32_t t, rt_hwtimer_mode_t opmode)
{
TIM_TypeDef *tim;
uint16_t m;
tim = (TIM_TypeDef *)timer->parent.user_data;
TIM_SetAutoreload(tim, t);
m = (opmode == HWTIMER_MODE_ONESHOT)? TIM_OPMode_Single : TIM_OPMode_Repetitive;
TIM_SelectOnePulseMode(tim, m);
TIM_Cmd(tim, ENABLE);
return RT_EOK;
}
static void timer_stop(rt_hwtimer_t *timer)
@ -90,11 +89,11 @@ static rt_err_t timer_ctrl(rt_hwtimer_t *timer, rt_uint32_t cmd, void *arg)
freq = *((rt_uint32_t*)arg);
clk.PCLK1_Frequency *= 2;
val = clk.PCLK1_Frequency/freq;
TIM_ITConfig(tim, TIM_IT_Update, DISABLE);
TIM_ITConfig(tim, TIM_IT_Update, DISABLE);
TIM_PrescalerConfig(tim, val - 1, TIM_PSCReloadMode_Immediate);
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
TIM_ITConfig(tim, TIM_IT_Update, ENABLE);
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
TIM_ITConfig(tim, TIM_IT_Update, ENABLE);
}
break;
default:
@ -116,31 +115,19 @@ static rt_uint32_t timer_counter_get(rt_hwtimer_t *timer)
return TIM_GetCounter(tim);
}
static rt_err_t timer_timeout_set(rt_hwtimer_t *timer, rt_uint32_t t)
{
TIM_TypeDef *tim;
tim = (TIM_TypeDef *)timer->parent.user_data;
TIM_SetAutoreload(tim, t);
return RT_EOK;
}
static const struct rt_hwtimer_info _info =
{
1000000, /* 可设置的最大计数时钟 */
2000, /* 可设置的最小计数时钟 */
0xFFFF, /* 最大超时值 */
HWTIMER_CNTMODE_UP,/* 递增计数方式 */
1000000, /* the maximum count frequency can be set */
2000, /* the minimum count frequency can be set */
0xFFFF, /* the maximum counter value */
HWTIMER_CNTMODE_UP,/* Increment or Decreasing count mode */
};
static const struct rt_hwtimer_ops _ops =
{
timer_init,
timer_deinit,
timer_start,
timer_stop,
timer_timeout_set,
timer_counter_get,
timer_ctrl,
};

94
components/drivers/hwtimer/hwtimer.c
View File

@ -25,9 +25,8 @@
#include <rtthread.h>
#include <rtdevice.h>
rt_inline rt_err_t timeout_set(rt_hwtimer_t *timer, rt_hwtimerval_t *tv)
rt_inline rt_uint32_t timeout_calc(rt_hwtimer_t *timer, rt_hwtimerval_t *tv)
{
rt_err_t err;
float overflow;
float timeout;
rt_uint32_t counter;
@ -36,15 +35,6 @@ rt_inline rt_err_t timeout_set(rt_hwtimer_t *timer, rt_hwtimerval_t *tv)
float devi_min = 1;
float devi;
if (timer->ops->stop != RT_NULL)
{
timer->ops->stop(timer);
}
else
{
return -RT_ENOSYS;
}
/* 把定时器溢出时间和定时时间换算成秒 */
overflow = timer->info->maxcnt/(float)timer->freq;
tv_sec = tv->sec + tv->usec/(float)1000000;
@ -90,12 +80,7 @@ rt_inline rt_err_t timeout_set(rt_hwtimer_t *timer, rt_hwtimerval_t *tv)
timer->period_sec = timeout;
counter = timeout*timer->freq;
if (timer->ops->timeout_set != RT_NULL)
{
err = timer->ops->timeout_set(timer, counter);
}
return err;
return counter;
}
static rt_err_t rt_hwtimer_init(struct rt_device *dev)
@ -115,10 +100,11 @@ static rt_err_t rt_hwtimer_init(struct rt_device *dev)
}
timer->mode = HWTIMER_MODE_ONESHOT;
timer->cycles = 0;
timer->overflow = 0;
if (timer->ops->init)
{
timer->ops->init(timer);
timer->ops->init(timer, 1);
}
else
{
@ -152,9 +138,9 @@ static rt_err_t rt_hwtimer_close(struct rt_device *dev)
rt_hwtimer_t *timer;
timer = (rt_hwtimer_t*)dev;
if (timer->ops->deinit != RT_NULL)
if (timer->ops->init != RT_NULL)
{
timer->ops->deinit(timer);
timer->ops->init(timer, 0);
}
else
{
@ -195,21 +181,29 @@ static rt_size_t rt_hwtimer_read(struct rt_device *dev, rt_off_t pos, void *buff
static rt_size_t rt_hwtimer_write(struct rt_device *dev, rt_off_t pos, const void *buffer, rt_size_t size)
{
rt_size_t len = 0;
rt_hwtimerval_t *t;
rt_err_t err;
rt_uint32_t t;
rt_hwtimer_mode_t opm = HWTIMER_MODE_PERIOD;
rt_hwtimer_t *timer;
if (size == sizeof(rt_hwtimerval_t))
timer = (rt_hwtimer_t *)dev;
if ((timer->ops->start == RT_NULL) || (timer->ops->stop == RT_NULL))
return 0;
if (size != sizeof(rt_hwtimerval_t))
return 0;
if ((timer->cycles <= 1) && (timer->mode == HWTIMER_MODE_ONESHOT))
{
t = (rt_hwtimerval_t*)buffer;
err = timeout_set((rt_hwtimer_t*)dev, t);
if (err == RT_EOK)
{
len = size;
}
opm = HWTIMER_MODE_ONESHOT;
}
timer->ops->stop(timer);
timer->overflow = 0;
return len;
t = timeout_calc(timer, (rt_hwtimerval_t*)buffer);
if (timer->ops->start(timer, t, opm) != RT_EOK)
size = 0;
return size;
}
static rt_err_t rt_hwtimer_control(struct rt_device *dev, rt_uint8_t cmd, void *args)
@ -221,31 +215,6 @@ static rt_err_t rt_hwtimer_control(struct rt_device *dev, rt_uint8_t cmd, void *
switch (cmd)
{
case HWTIMER_CTRL_START:
{
if (timer->ops->start != RT_NULL)
{
rt_hwtimer_mode_t opm;
if ((timer->cycles <= 1) && (timer->mode == HWTIMER_MODE_ONESHOT))
{
opm = HWTIMER_MODE_ONESHOT;
}
else
{
opm = HWTIMER_MODE_PERIOD;
}
timer->overflow = 0;
timer->ops->start(timer, opm);
}
else
{
result = -RT_ENOSYS;
}
}
break;
case HWTIMER_CTRL_STOP:
{
if (timer->ops->stop != RT_NULL)
@ -258,17 +227,6 @@ static rt_err_t rt_hwtimer_control(struct rt_device *dev, rt_uint8_t cmd, void *
}
}
break;
case HWTIMER_CTRL_TIMEOUT_SET:
{
if (args == RT_NULL)
{
result = -RT_EEMPTY;
break;
}
result = timeout_set(timer, (rt_hwtimerval_t*)args);
}
break;
case HWTIMER_CTRL_FREQ_SET:
{
rt_uint32_t *f;
@ -381,7 +339,7 @@ rt_err_t rt_device_hwtimer_register(rt_hwtimer_t *timer, const char *name, void
device = &(timer->parent);
device->type = RT_Device_Class_HwTimer;
device->type = RT_Device_Class_Timer;
device->rx_indicate = RT_NULL;
device->tx_complete = RT_NULL;

53
components/drivers/include/drivers/hwtimer.h
View File

@ -8,54 +8,50 @@
extern "C" {
#endif
/* 定时器控制命令 */
/* Timer Control Command */
typedef enum
{
HWTIMER_CTRL_TIMEOUT_SET = 0x01, /* 设置超时值 */
HWTIMER_CTRL_FREQ_SET, /* 设置计数频率 */
HWTIMER_CTRL_START, /* 启动定时器 */
HWTIMER_CTRL_STOP, /* 停止定时器 */
HWTIMER_CTRL_INFO_GET, /* 获取定时器特征信息 */
HWTIMER_CTRL_MODE_SET /* 设置定时模式 */
HWTIMER_CTRL_FREQ_SET = 0x01, /* set the count frequency */
HWTIMER_CTRL_STOP, /* stop timer */
HWTIMER_CTRL_INFO_GET, /* get a timer feature information */
HWTIMER_CTRL_MODE_SET /* Setting the timing mode(oneshot/period) */
} rt_hwtimer_ctrl_t;
/* 定时模式 */
/* Timing Mode */
typedef enum
{
HWTIMER_MODE_ONESHOT = 0x01,
HWTIMER_MODE_PERIOD
} rt_hwtimer_mode_t;
/* 定时器计数值 */
/* Time Value */
typedef struct rt_hwtimerval
{
rt_int32_t sec; /* 秒 */
rt_int32_t usec; /* 微秒 */
rt_int32_t sec; /* second */
rt_int32_t usec; /* microsecond */
} rt_hwtimerval_t;
#define HWTIMER_CNTMODE_UP 0x01 /* 定时器递增计数方式 */
#define HWTIMER_CNTMODE_DW 0x02 /* 定时器递减计数方式 */
#define HWTIMER_CNTMODE_UP 0x01 /* increment count mode */
#define HWTIMER_CNTMODE_DW 0x02 /* decreasing count mode */
struct rt_hwtimer_device;
struct rt_hwtimer_ops
{
void (*init)(struct rt_hwtimer_device *timer);
void (*deinit)(struct rt_hwtimer_device *timer);
void (*start)(struct rt_hwtimer_device *timer, rt_hwtimer_mode_t mode);
void (*init)(struct rt_hwtimer_device *timer, rt_uint32_t state);
rt_err_t (*start)(struct rt_hwtimer_device *timer, rt_uint32_t cnt, rt_hwtimer_mode_t mode);
void (*stop)(struct rt_hwtimer_device *timer);
rt_err_t (*timeout_set)(struct rt_hwtimer_device *timer, rt_uint32_t t);
rt_uint32_t (*count_get)(struct rt_hwtimer_device *timer);
rt_err_t (*control)(struct rt_hwtimer_device *timer, rt_uint32_t cmd, void *args);
};
/* 定时器基本参数(不可动态更改) */
/* Timer Feature Information */
struct rt_hwtimer_info
{
rt_int32_t maxfreq; /* 定时器支持的最大计数时钟 */
rt_int32_t minfreq; /* 定时器支持的最小计数时钟 */
rt_uint32_t maxcnt; /* 计数器最大超时值 */
rt_uint8_t cntmode; /* 计数模式(递增/递减,应用层无需关心此参数) */
rt_int32_t maxfreq; /* the maximum count frequency timer support */
rt_int32_t minfreq; /* the minimum count frequency timer support */
rt_uint32_t maxcnt; /* counter maximum value */
rt_uint8_t cntmode; /* count mode (inc/dec) */
};
typedef struct rt_hwtimer_device
@ -64,13 +60,12 @@ typedef struct rt_hwtimer_device
const struct rt_hwtimer_ops *ops;
const struct rt_hwtimer_info *info;
/* 驱动层不用关心以下参数 */
rt_int32_t freq; /* 计数频率 */
rt_int32_t overflow; /* 溢出次数 */
float period_sec; /* 溢出周期(s) */
rt_int32_t cycles; /* 循环次数 */
rt_int32_t reload; /* 重载cycles */
rt_hwtimer_mode_t mode; /* 定时模式 */
rt_int32_t freq; /* counting frequency set by the user */
rt_int32_t overflow; /* timer overflows */
float period_sec;
rt_int32_t cycles; /* how many times will generate a timeout event after overflow */
rt_int32_t reload; /* reload cycles(using in period mode) */
rt_hwtimer_mode_t mode; /* timing mode(oneshot/period) */
} rt_hwtimer_t;
rt_err_t rt_device_hwtimer_register(rt_hwtimer_t *timer, const char *name, void *user_data);

24
examples/test/hwtimer_test.c
View File

@ -13,15 +13,15 @@ static rt_err_t timer_timeout_cb(rt_device_t dev, rt_size_t size)
return 0;
}
int hwtimer(int freq, int t)
int hwtimer(void)
{
rt_err_t err;
rt_hwtimerval_t val;
rt_device_t dev = RT_NULL;
rt_tick_t tick;
rt_hwtimer_mode_t mode;
t = (t <= 0)? 5 : t;
int freq = 10000;
int t = 5;
if ((dev = rt_device_find(TIMER)) == RT_NULL)
{
@ -32,7 +32,7 @@ int hwtimer(int freq, int t)
if (rt_device_open(dev, RT_DEVICE_OFLAG_RDWR) != RT_EOK)
{
rt_kprintf("Open %s Fail\n", TIMER);
return -1;
return -1;
}
rt_device_set_rx_indicate(dev, timer_timeout_cb);
@ -44,7 +44,13 @@ int hwtimer(int freq, int t)
goto EXIT;
}
/* 设置定时器超时值 */
/* 周期模式 */
mode = HWTIMER_MODE_PERIOD;
err = rt_device_control(dev, HWTIMER_CTRL_MODE_SET, &mode);
tick = rt_tick_get();
rt_kprintf("Start Timer> Tick: %d\n", tick);
/* 设置定时器超时值并启动定时器 */
val.sec = t;
val.usec = 0;
rt_kprintf("SetTime: Sec %d, Usec %d\n", val.sec, val.usec);
@ -53,14 +59,6 @@ int hwtimer(int freq, int t)
rt_kprintf("SetTime Fail\n");
goto EXIT;
}
/* 周期模式 */
mode = HWTIMER_MODE_PERIOD;
err = rt_device_control(dev, HWTIMER_CTRL_MODE_SET, &mode);
/* 启动定时器 */
tick = rt_tick_get();
err = rt_device_control(dev, HWTIMER_CTRL_START, RT_NULL);
rt_kprintf("Start Timer> Tick: %d\n", tick);
rt_kprintf("Sleep %d sec\n", t);
rt_thread_delay(t*RT_TICK_PER_SECOND);