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bsp/stm32f10x: calibrate touch screen before starting GUI 

If we do not calibrate the touch screen, GUI is unusable. This patch use a semaphore to block GUI thread until calibration finish.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1791 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
chaos.proton@gmail.com 2011-11-08 09:33:18 +00:00
parent 065c3fb834
commit 4e8d6639f0
2 changed files with 26 additions and 2 deletions
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13
bsp/stm32f10x/application.c
View File

@ -45,6 +45,8 @@
#include "led.h"
extern rt_sem_t touch_screen_calibrated;
ALIGN(RT_ALIGN_SIZE)
static rt_uint8_t led_stack[ 512 ];
static struct rt_thread led_thread;
@ -151,6 +153,17 @@ void rt_init_thread_entry(void* parameter)
/* set lcd device as rtgui graphic driver */
rtgui_graphic_set_device(lcd);
/* without calibration, the position we got from the touch screen is
* useless raw value and the GUI is unusable. */
calibration_init();
if (touch_screen_calibrated != RT_NULL)
{
rt_sem_take(touch_screen_calibrated, RT_WAITING_FOREVER);
/* NOTE: no other thread use this semaphore, so we can delete it.
* If this is not your case, comment this line. */
rt_sem_delete(touch_screen_calibrated);
}
/* startup rtgui */
rtgui_startup();
}

15
bsp/stm32f10x/calibration.c
View File

@ -30,6 +30,9 @@ struct calibration_session
};
static struct calibration_session* calibration_ptr = RT_NULL;
/* a semaphore that will become avaible when calibration finished. */
rt_sem_t touch_screen_calibrated = RT_NULL;
static void calibration_data_post(rt_uint16_t x, rt_uint16_t y)
{
if (calibration_ptr != RT_NULL)
@ -254,6 +257,8 @@ void calibration_entry(void* parameter)
/* release memory */
rt_free(calibration_ptr);
calibration_ptr = RT_NULL;
/* tell other thread that we finished calibration */
rt_sem_release(touch_screen_calibrated);
}
void calibration_init()
@ -261,7 +266,12 @@ void calibration_init()
rt_device_t device;
device = rt_device_find("touch");
if (device == RT_NULL) return; /* no this device */
if (device == RT_NULL)
return; /* no such device */
touch_screen_calibrated = rt_sem_create("tc_cali", 0, RT_IPC_FLAG_FIFO);
if (touch_screen_calibrated == RT_NULL)
return;
calibration_ptr = (struct calibration_session*)rt_malloc(sizeof(struct calibration_session));
rt_memset(calibration_ptr, 0, sizeof(struct calibration_data));
@ -271,7 +281,8 @@ void calibration_init()
calibration_ptr->tid = rt_thread_create("cali", calibration_entry, RT_NULL,
2048, 20, 5);
if (calibration_ptr->tid != RT_NULL) rt_thread_startup(calibration_ptr->tid);
if (calibration_ptr->tid != RT_NULL)
rt_thread_startup(calibration_ptr->tid);
}
#ifdef RT_USING_FINSH