Massively sped up LCD comms
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11
example.c
11
example.c
@@ -13,7 +13,7 @@
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#include <stdint.h>
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#define TICK_RATE 100
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#define NPER (0x10000 - (20000000 / 12 / TICK_RATE))
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#define NPER (0x10000 - (20000000 / 6 / TICK_RATE))
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// I/O definitions
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#define BUTTON_1 P3_2
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@@ -64,8 +64,7 @@ uint8_t lcd_pos;
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// Quick'n'dirty CPU pause, just enough for the LCD to stabilize.
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void lcd_pause(void) {
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int i = 30;
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while(i--);
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__asm__ ("nop");
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}
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// Reads the status register from the LCD.
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@@ -174,6 +173,8 @@ void lcd_putchar(char c) {
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// Initializes the background tick timer (for delays).
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void timer_init(void) {
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CKCON0 = X2; // Enable 2x clock mode
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// Initialize timer 0 as 16-bit countdown, timer 1 as 8-bit auto-reload countdown
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TMOD = 0x21;
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@@ -194,7 +195,7 @@ void serial_init(void) {
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// Initialize timer 2 as 312500 Hz as the baud rate generator (for tulflash)
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RCAP2H = 0xFF;
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RCAP2L = 0xFE;
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RCAP2L = 0xFC;
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T2CON = 0x34;
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// Initialize serial I/O
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@@ -286,6 +287,8 @@ void main(void) {
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lcd_init();
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serial_init();
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delay(1);
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stdout_to_serial = 1;
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stdout_to_lcd = 1;
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