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This commit is contained in:
Joppe Blondel
2026-08-30 19:27:26 +02:00
parent 073a538794
commit 52d4d286c6
8 changed files with 391 additions and 130 deletions
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124
main.c
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@@ -15,87 +15,49 @@
// --------------------------------
static video_framebuffer_t fb0, fb1;
static video_framebuffer_t pixel_mode_buffer;
static text_mode_buffer_t text_mode_buffer;
static volatile bool framebuffer_switched = true;
static bool text_mode = true;
static bool text_mode_dirty = true;
static uint console_row = 0;
static uint console_col = 0;
void framebuffer_switched_cb(){
framebuffer_switched = true;
}
static void text_mode_clear_buffer(void) {
static void text_mode_clear_buffer() {
memset(text_mode_buffer, 0, sizeof(text_mode_buffer));
console_row = 0;
console_col = 0;
}
static void text_mode_scroll_up(void) {
static void text_mode_scroll_up() {
memmove(&text_mode_buffer[0][0],
&text_mode_buffer[1][0],
(CHAR_LINES - 1) * CHARS_PER_LINE * sizeof(text_mode_buffer[0][0]));
memset(text_mode_buffer[CHAR_LINES - 1], 0, CHARS_PER_LINE * sizeof(text_mode_buffer[0][0]));
}
static void text_mode_newline(void) {
console_col = 0;
if (console_row + 1 >= CHAR_LINES) {
text_mode_scroll_up();
} else {
console_row++;
}
}
static void text_mode_put_char(char c) {
if (c == '\r') {
console_col = 0;
static void pixel_mode_write_byte(uint16_t x, uint16_t y, uint8_t pixels) {
if (x >= VIDEO_WIDTH || y >= VIDEO_HEIGHT) {
return;
}
if (c == '\n') {
text_mode_newline();
return;
}
for (uint bit_index = 0; bit_index < 8 && x + bit_index < VIDEO_WIDTH;
bit_index++) {
uint pixel_x = x + bit_index;
uint word = pixel_x >> 5;
uint bit = 31u - (pixel_x & 31u);
uint32_t mask = 1u << bit;
if (c == '\b' || c == 0x7f) {
if (console_col > 0) {
console_col--;
text_mode_buffer[console_row][console_col] = 0;
if ((pixels & (1u << (7u - bit_index))) != 0) {
pixel_mode_buffer[y][word] |= mask;
} else {
pixel_mode_buffer[y][word] &= ~mask;
}
return;
}
if ((unsigned char)c < 32 || (unsigned char)c > 126) {
return;
}
text_mode_buffer[console_row][console_col] = c;
console_col++;
if (console_col >= CHARS_PER_LINE) {
text_mode_newline();
}
}
static void text_mode_puts(const char *s) {
while (*s) {
text_mode_put_char(*s++);
}
}
static void poll_usb_console(void) {
int ch;
while ((ch = getchar_timeout_us(0)) != PICO_ERROR_TIMEOUT) {
text_mode_put_char((char)ch);
putchar(ch);
}
}
void main() {
stdio_init_all();
multicore_launch_core1(core1_entry);
init_font_cache();
@@ -104,33 +66,57 @@ void main() {
video_init(fb0);
text_mode_clear_buffer();
text_mode_puts("+------------------------------+\r\n");
text_mode_puts("| Pico-PAL Text Mode |\r\n");
text_mode_puts("+------------------------------+\r\n");
gpio_init(25);
gpio_set_dir(25, GPIO_OUT);
memset(pixel_mode_buffer, 0, sizeof(pixel_mode_buffer));
int fbnum = 1;
video_framebuffer_ptr_t fbs[] = {fb0, fb1};
while (true) {
poll_usb_console();
uint32_t value;
while (core0_try_read_from_core1(&value)) {
char ch = (char)value;
text_mode_put_char((char)ch);
putchar(ch);
video_command_t cmd;
while (core0_try_read_from_core1((uint64_t*)&cmd)) {
switch(cmd.cmd){
case VIDEO_COMMAND_MODE_SET:{
switch(cmd.data[0]){
case VIDEO_MODE_TEXT:
text_mode = true;
break;
case VIDEO_MODE_PIXEL:
text_mode = false;
break;
default:
}
} break;
case VIDEO_WRITE_TEXT:{
char c = (char)cmd.data[0];
int posx = ((int)cmd.data[1] >= CHARS_PER_LINE) ? CHARS_PER_LINE-1 : (int)cmd.data[1];
int posy = ((int)cmd.data[2] >= CHAR_LINES) ? CHAR_LINES-1 : (int)cmd.data[2];
text_mode_buffer[posy][posx] = c;
} break;
case VIDEO_WRITE_PIXEL:{
pixel_mode_write_byte(cmd.data[1], cmd.data[2],
(uint8_t)cmd.data[0]);
} break;
case VIDEO_SCROLL_TEXT:{
text_mode_scroll_up();
} break;
case VIDEO_CLR_TEXT:{
text_mode_clear_buffer();
} break;
case VIDEO_CLR_PIXEL:{
memset(pixel_mode_buffer, 0, sizeof(pixel_mode_buffer));
} break;
default:
}
}
// Check if need to draw new frame
if(framebuffer_switched){
gpio_put(25, fbnum);
if(text_mode){
draw_text_mode(fbs[fbnum], text_mode_buffer);
} else {
memcpy(fbs[fbnum], pixel_mode_buffer,
sizeof(pixel_mode_buffer));
video_set_framebuffer(fbs[fbnum]);
}
fbnum = (fbnum+1)%2;
framebuffer_switched = false;
}