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drivers: display: mb_display: Add internal reset helper

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Add a helper function to reset the state of the display, and make use
of it from the various public functions. This also ensures that the
timer is stopped before starting a new display routine.

Change-Id: I8a916b5b13c18b41b7fc3593e6d97e874ef117af
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Johan Hedberg 2017-04-05 12:29:12 +03:00 • committed by Anas Nashif
commit 0260af6372
1 changed files with 15 additions and 6 deletions
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21
drivers/display/mb_display.c
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@ -202,21 +202,26 @@ static struct mb_display display = {
.timer = K_TIMER_INITIALIZER(display.timer, show_row, clear_display), .timer = K_TIMER_INITIALIZER(display.timer, show_row, clear_display),
}; };
static void reset_display(struct mb_display *disp)
{
k_timer_stop(&disp->timer);
disp->str = NULL;
disp->scroll = SCROLL_OFF;
}
void mb_display_image(struct mb_display *disp, const struct mb_image *img, void mb_display_image(struct mb_display *disp, const struct mb_image *img,
int32_t duration) int32_t duration)
{ {
disp->str = NULL; reset_display(disp);
disp->scroll = SCROLL_OFF;
disp->duration = duration;
disp->duration = duration;
start_image(disp, img); start_image(disp, img);
} }
void mb_display_stop(struct mb_display *disp) void mb_display_stop(struct mb_display *disp)
{ {
k_timer_stop(&disp->timer); reset_display(disp);
disp->str = NULL;
disp->scroll = SCROLL_OFF;
} }
void mb_display_char(struct mb_display *disp, char chr, int32_t duration) void mb_display_char(struct mb_display *disp, char chr, int32_t duration)
@ -237,6 +242,8 @@ void mb_display_string(struct mb_display *disp, int32_t duration,
return; return;
} }
reset_display(disp);
disp->str = &disp->str_buf[1]; disp->str = &disp->str_buf[1];
disp->duration = duration; disp->duration = duration;
disp->scroll = SCROLL_OFF; disp->scroll = SCROLL_OFF;
@ -256,6 +263,8 @@ void mb_display_print(struct mb_display *disp, const char *fmt, ...)
return; return;
} }
reset_display(disp);
if (disp->str_buf[1] == '\0') { if (disp->str_buf[1] == '\0') {
disp->str = NULL; disp->str = NULL;
} else { } else {