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Add software-scrolling to Screensaver

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Compared to the white-text display used for testing,
the actually used blue-text display does not support
hardware-scrolling (the text was just static)

display:
    - Add code that continously scrolls screensaver text 1 character
      to the right and wraps the truncating part to the start
    - Add option to enable/disable hardware-scrolling if available
This commit is contained in:
jonny 2024-03-03 11:47:32 +01:00
parent 3514dd6bf2
commit fbae02b328
1 changed files with 48 additions and 15 deletions
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61
board_single/main/display.cpp
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@ -15,6 +15,9 @@ extern "C"{
// continously vary display contrast from 0 to 250 in OVERVIEW status screen
//#define BRIGHTNESS_TEST
// if display and driver support hardware scrolling the SCREENSAVER status-screen will be smoother:
//#define HARDWARE_SCROLL_AVAILABLE
//=== variables ===
// every function can access the display configuration from config.cpp
@ -349,45 +352,71 @@ void showStatusScreenMotors(display_task_parameters_t *objects)
}
//###############################
//#### showScreen Sreensaver ####
//###############################
// ################################
// #### showScreen Screensaver ####
// ################################
// show inactivity duration and battery perventage scrolling across screen the entire screen to prevent burn in
#define STATUS_SCREEN_SCREENSAVER_DELAY_NEXT_LINE_MS 10*1000
#define STATUS_SCREEN_SCREENSAVER_DELAY_NEXT_LINE_MS 10 * 1000
#define STATUS_SCREEN_SCREENSAVER_UPDATE_INTERVAL 500
#define DISPLAY_HORIZONTAL_CHARACTER_COUNT 16
#define DISPLAY_VERTICAL_LINE_COUNT 8
void showStatusScreenScreensaver(display_task_parameters_t *objects)
{
// note: scrolling is enabled at screen change (display_selectStatusPage())
//-- variables for line rotation --
static int msPassed = 0;
static int currentLine = 0;
static bool lineChanging = false;
// clear display once when rotating to next line
if (lineChanging) {
if (lineChanging)
{
ssd1306_clear_screen(&dev, false);
lineChanging = false;
}
//-- print 2 lines scrolling horizontally --
#ifdef HARDWARE_SCROLL_AVAILABLE // when display supports hardware scrolling -> only the content has to be updated
// note: scrolling is enabled at screen change (display_selectStatusPage())
// update text every iteration to prevent empty screen at start
displayTextLine(&dev, currentLine, false, false, "IDLE since:");
displayTextLine(&dev, currentLine + 1, false, false, "%.1fh, B:%02.0f%%",
(float)objects->control->getInactivityDurationMs() / 1000 / 60 / 60,
getBatteryPercent());
// note: scrolling is disabled at screen change (display_selectStatusPage())
#else // custom implementation to scroll the text 1 character to the right every iteration (also wraps over the end to beginning)
static int offset = DISPLAY_HORIZONTAL_CHARACTER_COUNT;
char buf1[64], buf2[64];
// scroll text left to right (taken window of the string moves to the left => offset 16->0, 16->0 ...)
offset -= 1;
if (offset < 0)
offset = DISPLAY_HORIZONTAL_CHARACTER_COUNT - 1; // 0 = no crop -> start over with crop
// note: these strings have to be symetrical and 2x display character count long
snprintf(buf1, 64, "IDLE since: IDLE since: ");
snprintf(buf2, 64, "%.1fh, B:%02.0f%% %.1fh, B:%02.0f%% ",
(float)objects->control->getInactivityDurationMs() / 1000 / 60 / 60,
getBatteryPercent(),
(float)objects->control->getInactivityDurationMs() / 1000 / 60 / 60,
getBatteryPercent());
// print strings on display while limiting to certain window (ignore certain count of characters at start)
displayTextLine(&dev, currentLine, false, false, "%s", buf1 + offset);
displayTextLine(&dev, currentLine + 1, false, false, "%s", buf2 + offset);
#endif
//-- handle line rotation --
// to not block the display task for several seconds returning every e.g. 500ms here
// -> ensures detection of activity (exit condition) in task loop is handled regularly
if (msPassed > STATUS_SCREEN_SCREENSAVER_DELAY_NEXT_LINE_MS) // switch to next line is due
{
msPassed = 0; // rest seconds count
// increment / rotate to next line
if (++currentLine >= 7) // rotate to next line
if (++currentLine >= DISPLAY_VERTICAL_LINE_COUNT - 1) // rotate to next line
currentLine = 0;
lineChanging = true; //clear screen in next run
lineChanging = true; // clear screen in next run
}
// wait update-update interval and increment passed time after each run
//-- wait update interval --
// wait and increment passed time after each run
vTaskDelay(STATUS_SCREEN_SCREENSAVER_UPDATE_INTERVAL / portTICK_PERIOD_MS);
msPassed += STATUS_SCREEN_SCREENSAVER_UPDATE_INTERVAL;
// note: scrolling is disabled at screen change (display_selectStatusPage())
}
//########################
//#### showStartupMsg ####
//########################
@ -415,9 +444,11 @@ void display_selectStatusPage(displayStatusPage_t newStatusPage)
//-- run commands when switching FROM certain mode --
switch (selectedStatusPage)
{
case STATUS_SCREEN_SCREENSAVER: // disable scrolling when exiting screensaver
ssd1306_hardware_scroll(&dev, SCROLL_STOP);
#ifdef HARDWARE_SCROLL_AVAILABLE
case STATUS_SCREEN_SCREENSAVER:
ssd1306_hardware_scroll(&dev, SCROLL_STOP); // disable scrolling when exiting screensaver
break;
#endif
default:
break;
}
@ -429,8 +460,10 @@ void display_selectStatusPage(displayStatusPage_t newStatusPage)
switch (selectedStatusPage)
{
case STATUS_SCREEN_SCREENSAVER:
ssd1306_clear_screen(&dev, false);
ssd1306_clear_screen(&dev, false); // clear screen when switching
#ifdef HARDWARE_SCROLL_AVAILABLE
ssd1306_hardware_scroll(&dev, SCROLL_RIGHT);
#endif
break;
default:
break;