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reduce LED activity time for scrolling text

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Silentium 2019-05-13 23:11:54 +02:00
parent ff478d09b7
commit dcfcc325df
1 changed files with 13 additions and 4 deletions
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17
src/main.cpp
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@ -9,6 +9,7 @@
int pixel_width(String const & text); int pixel_width(String const & text);
void shiftout(uint8_t const bit); void shiftout(uint8_t const bit);
void clear_buffer();
int write_letter_at(int col, uint8_t const letter); int write_letter_at(int col, uint8_t const letter);
void letters(int pos); void letters(int pos);
void receive_serial(); void receive_serial();
@ -53,6 +54,12 @@ void shiftout(uint8_t const bit) {
PORTB = 0; PORTB = 0;
} }
void clear_buffer() {
for (int i = 0; i < WIDTH; ++i) {
buffer[i] = 0;
}
}
int write_letter_at(int col, uint8_t const letter) { int write_letter_at(int col, uint8_t const letter) {
uint8_t charWidth = pgm_read_byte(&font_var_width[letter].width); uint8_t charWidth = pgm_read_byte(&font_var_width[letter].width);
for (int_fast8_t x = 0; x < charWidth; ++x) { for (int_fast8_t x = 0; x < charWidth; ++x) {
@ -68,9 +75,7 @@ int write_letter_at(int col, uint8_t const letter) {
} }
void letters(int pos) { void letters(int pos) {
for (int i = 0; i < WIDTH; ++i) { clear_buffer();
buffer[i] = 0;
}
for (unsigned int c = 0; c < message.length() && pos < WIDTH; ++c) { for (unsigned int c = 0; c < message.length() && pos < WIDTH; ++c) {
pos = write_letter_at(pos, message[c]); pos = write_letter_at(pos, message[c]);
@ -133,7 +138,11 @@ void loop() {
} }
++ticks; ++ticks;
if (ticks == 8) { if (ticks == 6) {
if (messageLength > 120) {
clear_buffer();
}
} else if (ticks == 8) {
ticks = 0; ticks = 0;
if (messageLength > 120) { if (messageLength > 120) {
--turn; --turn;