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authorDaniel Friesel <derf@finalrewind.org>2016-01-19 19:59:51 +0100
committerDaniel Friesel <derf@finalrewind.org>2016-01-19 19:59:51 +0100
commitabf69bd53f86300d263d3abeeae81a9e1c3cd5c0 (patch)
tree7936114f76c040ac3203a59641c3056b7e65e195 /src
parentcd52b9a6b0272466f414ce4802ce50a0ec38dd29 (diff)
support scrolling arbitrary strings.
Diffstat (limited to 'src')
-rw-r--r--src/display.cc48
-rw-r--r--src/display.h1
-rw-r--r--src/font.h1
-rw-r--r--src/main.cc52
-rw-r--r--src/system.cc11
5 files changed, 49 insertions, 64 deletions
diff --git a/src/display.cc b/src/display.cc
index b1b0af5..4215983 100644
--- a/src/display.cc
+++ b/src/display.cc
@@ -5,10 +5,11 @@
#include <stdlib.h>
#include "display.h"
+#include "font.h"
Display display;
-extern volatile uint8_t disp[8];
+uint8_t teststr[] = {'O', 'h', 'a', 'i', '!', 0};
void Display::disable()
{
@@ -41,22 +42,14 @@ ISR(TIMER0_OVF_vect)
{
static uint8_t active_col = 0;
static uint16_t scroll = 0;
- static uint8_t disp_offset = 0;
- static uint8_t disp_buf[8];
+ static uint8_t disp_buf[] = {0xff,0xfb,0xdd,0xfd,0xdd,0xfb,0xff,0xff};
- uint8_t i;
+ static uint8_t str_pos = 0;
+ static int8_t char_pos = -1;
- if (++scroll == 512) {
- scroll = 0;
- if (++disp_offset == sizeof(disp)) {
- disp_offset = 0;
- }
-
- for (i = 0; i < 8; i++) {
- disp_buf[i] = ~disp[(disp_offset + i) % sizeof(disp)];
- }
- }
+ uint8_t i, glyph_len;
+ uint8_t *glyph_addr;
/*
* To avoid flickering, do not put any code (or expensive index
@@ -68,4 +61,31 @@ ISR(TIMER0_OVF_vect)
if (++active_col == 8)
active_col = 0;
+
+ if (++scroll == 512) {
+ scroll = 0;
+
+ for (i = 0; i < 7; i++) {
+ disp_buf[i] = disp_buf[i+1];
+ }
+
+ glyph_addr = (uint8_t *)pgm_read_ptr(&font[(uint8_t)display.string[str_pos]]);
+ glyph_len = pgm_read_byte(&glyph_addr[0]);
+ char_pos++;
+
+ if (char_pos > glyph_len) {
+ char_pos = 0;
+ str_pos++;
+ }
+
+ if (display.string[str_pos] == 0) {
+ str_pos = 0;
+ }
+
+ if (char_pos == 0) {
+ disp_buf[7] = 0xff; // whitespace
+ } else {
+ disp_buf[7] = ~pgm_read_byte(&glyph_addr[char_pos]);
+ }
+ }
}
diff --git a/src/display.h b/src/display.h
index cb263d0..d239e18 100644
--- a/src/display.h
+++ b/src/display.h
@@ -9,6 +9,7 @@ class Display {
Display() {};
void enable(void);
void disable(void);
+ char string[128];
};
extern Display display;
diff --git a/src/font.h b/src/font.h
index aea6b8a..a705d57 100644
--- a/src/font.h
+++ b/src/font.h
@@ -134,6 +134,7 @@ const unsigned char PROGMEM chr_126[] = {0x05,0x08,0x10,0x08,0x04,0x08}; // ~
const glyph_t font[] PROGMEM = {
chr_001,
+ chr_001,
chr_002,
chr_003,
chr_004,
diff --git a/src/main.cc b/src/main.cc
index fbb40c9..f665e18 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -9,8 +9,6 @@
#include "modem.h"
#include "system.h"
-volatile uint8_t disp[8];
-
int main (void)
{
// disable ADC to save power
@@ -22,50 +20,12 @@ int main (void)
// Enable pull-ups on PC3 and PC7 (button pins)
PORTC |= _BV(PC3) | _BV(PC7);
- disp[0] = 0x01;
- disp[1] = 0x02;
- disp[2] = 0x04;
- disp[3] = 0x08;
- disp[4] = 0x10;
- disp[5] = 0x20;
- disp[6] = 0x40;
- disp[7] = 0x80;
-
-#if 0
- // smile!
- disp[0] = 0x08;
- disp[1] = 0x04;
- disp[2] = 0x62;
- disp[3] = 0x02;
- disp[4] = 0x02;
- disp[5] = 0x62;
- disp[6] = 0x04;
- disp[7] = 0x08;
- disp[8] = 0x00;
- disp[9] = 0x00;
- disp[10] = 0x00;
- disp[11] = 0x00;
- disp[12] = 0x00;
- disp[13] = 0x00;
- disp[14] = 0x00;
- disp[15] = 0x00;
- disp[16] = 0x28;
- disp[17] = 0x44;
- disp[18] = 0x22;
- disp[19] = 0x02;
- disp[20] = 0x02;
- disp[21] = 0x22;
- disp[22] = 0x44;
- disp[23] = 0x28;
- disp[24] = 0x00;
- disp[25] = 0x00;
- disp[26] = 0x00;
- disp[27] = 0x00;
- disp[28] = 0x00;
- disp[29] = 0x00;
- disp[30] = 0x00;
- disp[31] = 0x00;
-#endif
+ display.string[0] = 'O';
+ display.string[1] = 'h';
+ display.string[2] = 'a';
+ display.string[3] = 'i';
+ display.string[4] = '!';
+ display.string[5] = 0;
display.enable();
modem.enable();
diff --git a/src/system.cc b/src/system.cc
index 09c0f53..340615d 100644
--- a/src/system.cc
+++ b/src/system.cc
@@ -12,11 +12,10 @@
System rocket;
-extern volatile uint8_t disp[8];
-
void System::loop()
{
static uint8_t i = 0;
+ char modem_char;
// both buttons are pressed
if ((PINC & (_BV(PC3) | _BV(PC7))) == 0) {
// naptime!
@@ -70,9 +69,13 @@ void System::loop()
}
while (modem.buffer_available()) {
- disp[i++] = modem.buffer_get();
- if (i == 8)
+ modem_char = modem.buffer_get();
+ display.string[i++] = modem_char;
+ if (i == 127) {
+ i = 0;
+ } else if (modem_char == 0) {
i = 0;
+ }
}
}