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Diffstat (limited to 'include/lcdlib.c')
-rw-r--r--include/lcdlib.c53
1 files changed, 23 insertions, 30 deletions
diff --git a/include/lcdlib.c b/include/lcdlib.c
index 69d6df0..beced28 100644
--- a/include/lcdlib.c
+++ b/include/lcdlib.c
@@ -17,38 +17,32 @@
#include "lcdlib.h"
-static char previous_lines[LCD_HEIGHT][LCD_WIDTH+1];
-static const char* esc = "\x1B[L";
+static char previous_lines[LCD_HEIGHT][LCD_WIDTH + 1];
+static const char *esc = "\x1B[L";
static FILE *lcd = NULL;
static int line_idx;
-int
-lcd_begin(void) {
+int lcd_begin(void) {
lcd = fopen("/dev/lcd", "w");
- if (lcd == NULL) return EXIT_FAILURE;
+ if (lcd == NULL)
+ return EXIT_FAILURE;
lcd_clear();
return EXIT_SUCCESS;
}
-void
-lcd_end(void) {
- fclose(lcd);
-}
+void lcd_end(void) { fclose(lcd); }
-void
-lcd_set_blink(void) {
+void lcd_set_blink(void) {
fprintf(lcd, "%sB", esc);
fflush(lcd);
}
-void
-lcd_stop_blink(void) {
+void lcd_stop_blink(void) {
fprintf(lcd, "%sb", esc);
fflush(lcd);
}
-void
-lcd_clear(void) {
+void lcd_clear(void) {
line_idx = 0;
for (int y = 0; y + 1 < LCD_HEIGHT; y++) {
fprintf(lcd, "%sy%dx0;%sk", esc, y, esc);
@@ -57,18 +51,17 @@ lcd_clear(void) {
fflush(lcd);
}
-void
-lcd_put_line(const enum LCD_WRITE_MODE mode, const char *line) {
+void lcd_put_line(const enum LCD_WRITE_MODE mode, const char *line) {
char last_line = 0;
if (line_idx == LCD_HEIGHT) {
if (mode == L_SCROLL) {
// If we're at the bottom, ``shift'' everything up
for (int y = 1; y < LCD_HEIGHT; y++) {
- // Go to the start of row y, clear the line, and print the
- // previous string there
- fprintf(lcd, "%sy%dx0;%sk%s", esc, y-1, esc, previous_lines[y]);
- // Overwrite the stored previous line with the next
- strncpy(previous_lines[y-1], previous_lines[y], LCD_WIDTH+1);
+ // Go to the start of row y, clear the line, and print the
+ // previous string there
+ fprintf(lcd, "%sy%dx0;%sk%s", esc, y - 1, esc, previous_lines[y]);
+ // Overwrite the stored previous line with the next
+ strncpy(previous_lines[y - 1], previous_lines[y], LCD_WIDTH + 1);
}
}
last_line = 1;
@@ -77,20 +70,20 @@ lcd_put_line(const enum LCD_WRITE_MODE mode, const char *line) {
fprintf(lcd, "%sy%dx0;%sk%s", esc, line_idx, esc, line);
fflush(lcd);
// Store this line, null-terminate!
- if (last_line) line_idx--;
- strncpy(previous_lines[line_idx], line, LCD_WIDTH+1);
+ if (last_line)
+ line_idx--;
+ strncpy(previous_lines[line_idx], line, LCD_WIDTH + 1);
previous_lines[line_idx][LCD_WIDTH] = 0;
- if (mode == L_SCROLL && line_idx < LCD_HEIGHT) line_idx++;
+ if (mode == L_SCROLL && line_idx < LCD_HEIGHT)
+ line_idx++;
}
-void
-lcd_printf_line(const enum LCD_WRITE_MODE mode,
- const char *format, ...) {
- char buf[LCD_WIDTH+1];
+void lcd_printf_line(const enum LCD_WRITE_MODE mode, const char *format, ...) {
+ char buf[LCD_WIDTH + 1];
va_list(args);
va_start(args, format);
- vsnprintf(buf, LCD_WIDTH+1, format, args);
+ vsnprintf(buf, LCD_WIDTH + 1, format, args);
va_end(args);
lcd_put_line(mode, buf);