RudolphRiedel
commented
1 year ago How is this an issue? :-) Sure, this is worthy to be discussed and the place to discuss this would have been two over in "Discussions". :-)
Now doing stuff on release of buttons just requires to shuffle things around in the state machine. Like this for example:
void TFT_touch(void)
{
uint8_t tag;
static uint8_t toggle_lock = 0;
static uint8_t tag_pressed_10 = 0;
if(tft_active != 0)
{
if(EVE_IS_BUSY == EVE_busy()) /* is EVE still processing the last display list? */
{
return;
}
display_list_size = EVE_memRead16(REG_CMD_DL); /* debug-information, get the size of the last generated display-list */
uint32_t touchtest = EVE_memRead32(REG_TOUCH_RAW_XY); /* to check if the display is touched at all */
tag = EVE_memRead8(REG_TOUCH_TAG); /* read the value for the first touch point */
switch(tag)
{
case 0:
if(0xffffffff == touchtest) /* no touching registered */
{
toggle_lock = 0;
if(tag_pressed_10) /* use button on top as on/off toggle-switch */
{
tag_pressed_10 = 0;
if(0 == toggle_state)
{
toggle_state = EVE_OPT_FLAT;
}
else
{
toggle_state = 0;
}
}
}
break;
case 10:
if(0 == toggle_lock) /* lock out other events */
{
tag_pressed_10 = 42;
}
break;
}
}
}As there are no extra events for "touch up" and the tag-value just falls back to zero, I added the extra variable to store events with tag 10: tag_pressed_10 What the toggle_lock is now supposed to do is to prevent additional events, from a second button for example.
When the tag-value returns to zero the toggle_lock is cleared and if the button had been touched before it is toggled between on and off.
And I threw in something new, reading REG_TOUCH_RAW_XY. With this we can differentiate between continued sliding around on the display and that the finger is actually lifted. When you slide off a button the tag value reported falls back to zero.
RudolphRrr
lotfibk
Hello,
I am using a FT813 Development Module with 5.0 inch WVGA TFT LCD (800x480p Capacitive) and I am developing a GUI on that screen. The problem is that I am trying to trigger the buttons on the screen only when I remove my finger from the screen (on a rising edge). But, so far, I am not able to do so, as they only trigger when I press.
Although I spotted that in the "Calibration" demo, all 3 buttons that appear on the screen (one after the other) are only triggered once my finger has been removed from the screen. And even after having a look at the code that runs the Calibration demo, I can't figure out how to do so.
Thank you in advance.
Here is some of the code that I am using (in case it could help) : in void TFT_display(void):
in void TFT_touch(void):