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MAX6921: fix demo-mode "scroll_font" (pointed chars)

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endym 2024-03-29 19:37:52 +01:00
parent 1403c5ef66
commit 9d75525477
1 changed files with 15 additions and 8 deletions
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23
esphome/components/max6921/max6921.cpp
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@ -313,28 +313,35 @@ void MAX6921Component::update_display_(void) {
}
void MAX6921Component::update_demo_mode_scroll_font_(void) {
static char *text = new char[this->display_.num_digits + 1];
static char *text = new char[this->display_.num_digits + 2 + 1]; // comma and point do not use an extra display position
static uint8_t start_pos = this->display_.num_digits - 1; // start at right side
static uint start_font_idx = 0;
uint font_idx, pos = 0;
uint font_idx, text_idx = 0, char_with_point_num = 0;
// build text...
font_idx = start_font_idx;
ESP_LOGV(TAG, "%s(): ENTRY: start-pos=%u, start-font-idx=%u",
__func__, start_pos, start_font_idx);
do {
if (pos < start_pos) { // before start position?
text[pos++] = ' '; // add blank to string
if (text_idx < start_pos) { // before start position?
text[text_idx++] = ' '; // add blank to string
} else {
if (this->ascii_out_data_[font_idx] > 0) { // displayable character?
text[pos++] = ' ' + font_idx; // add character to string
text[text_idx] = ' ' + font_idx; // add character to string
if ((text[text_idx] == '.') || (text[text_idx] == ',')) { // point-only character?
if (text_idx > 0) { // yes -> point after a character?
++text_idx;
++char_with_point_num;
}
} else
++text_idx;
}
font_idx = (font_idx + 1) % ARRAY_ELEM_COUNT(ASCII_TO_SEG); // next font character
}
ESP_LOGV(TAG, "%s(): LOOP: pos=%u, font-idx=%u, char='%c'",
__func__, (pos>0)?pos-1:0, font_idx, (pos>0)?text[pos-1]:' ');
} while (pos < this->display_.num_digits);
text[pos] = 0;
__func__, (text_idx>0)?text_idx-1:0, font_idx, (text_idx>0)?text[text_idx-1]:' ');
} while ((text_idx - char_with_point_num) < this->display_.num_digits);
text[text_idx] = 0;
// determine next start font index...
if (start_pos == 0) {
start_font_idx = text[1] - ' ';