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| #include <avr/io.h>
#include <util/delay.h>
#include <stdint.h>
static const uint8_t font5x7[][5] = {
{0x00,0x00,0x00,0x00,0x00}, // 32
{0x00,0x00,0x5F,0x00,0x00}, // 33 !
{0x00,0x07,0x00,0x07,0x00}, // 34 "
{0x14,0x7F,0x14,0x7F,0x14}, // 35 #
{0x24,0x2A,0x7F,0x2A,0x12}, // 36 $
{0x23,0x13,0x08,0x64,0x62}, // 37 %
{0x36,0x49,0x55,0x22,0x50}, // 38 &
{0x00,0x05,0x03,0x00,0x00}, // 39 '
{0x00,0x1C,0x22,0x41,0x00}, // 40 (
{0x00,0x41,0x22,0x1C,0x00}, // 41 )
{0x14,0x08,0x3E,0x08,0x14}, // 42 *
{0x08,0x08,0x3E,0x08,0x08}, // 43 +
{0x00,0x50,0x30,0x00,0x00}, // 44 ,
{0x08,0x08,0x08,0x08,0x08}, // 45 -
{0x00,0x60,0x60,0x00,0x00}, // 46 .
{0x20,0x10,0x08,0x04,0x02}, // 47 /
{0x3E,0x51,0x49,0x45,0x3E}, // 48 0
{0x00,0x42,0x7F,0x40,0x00}, // 49 1
{0x42,0x61,0x51,0x49,0x46}, // 50 2
{0x21,0x41,0x45,0x4B,0x31}, // 51 3
{0x18,0x14,0x12,0x7F,0x10}, // 52 4
{0x27,0x45,0x45,0x45,0x39}, // 53 5
{0x3C,0x4A,0x49,0x49,0x30}, // 54 6
{0x01,0x71,0x09,0x05,0x03}, // 55 7
{0x36,0x49,0x49,0x49,0x36}, // 56 8
{0x06,0x49,0x49,0x29,0x1E}, // 57 9
{0x00,0x36,0x36,0x00,0x00}, // 58 :
{0x00,0x56,0x36,0x00,0x00}, // 59 ;
{0x08,0x14,0x22,0x41,0x00}, // 60 <
{0x14,0x14,0x14,0x14,0x14}, // 61 =
{0x00,0x41,0x22,0x14,0x08}, // 62 >
{0x02,0x01,0x51,0x09,0x06}, // 63 ?
{0x32,0x49,0x79,0x41,0x3E}, // 64 @
{0x7E,0x11,0x11,0x11,0x7E}, // 65 A
{0x7F,0x49,0x49,0x49,0x36}, // 66 B
{0x3E,0x41,0x41,0x41,0x22}, // 67 C
{0x7F,0x41,0x41,0x22,0x1C}, // 68 D
{0x7F,0x49,0x49,0x49,0x41}, // 69 E
{0x7F,0x09,0x09,0x09,0x01}, // 70 F
{0x3E,0x41,0x49,0x49,0x7A}, // 71 G
{0x7F,0x08,0x08,0x08,0x7F}, // 72 H
{0x00,0x41,0x7F,0x41,0x00}, // 73 I
{0x20,0x40,0x41,0x3F,0x01}, // 74 J
{0x7F,0x08,0x14,0x22,0x41}, // 75 K
{0x7F,0x40,0x40,0x40,0x40}, // 76 L
{0x7F,0x02,0x0C,0x02,0x7F}, // 77 M
{0x7F,0x04,0x08,0x10,0x7F}, // 78 N
{0x3E,0x41,0x41,0x41,0x3E}, // 79 O
{0x7F,0x09,0x09,0x09,0x06}, // 80 P
{0x3E,0x41,0x51,0x21,0x5E}, // 81 Q
{0x7F,0x09,0x19,0x29,0x46}, // 82 R
{0x46,0x49,0x49,0x49,0x31}, // 83 S
{0x01,0x01,0x7F,0x01,0x01}, // 84 T
{0x3F,0x40,0x40,0x40,0x3F}, // 85 U
{0x1F,0x20,0x40,0x20,0x1F}, // 86 V
{0x3F,0x40,0x38,0x40,0x3F}, // 87 W
{0x63,0x14,0x08,0x14,0x63}, // 88 X
{0x07,0x08,0x70,0x08,0x07}, // 89 Y
{0x61,0x51,0x49,0x45,0x43}, // 90 Z
{0x00,0x7F,0x41,0x41,0x00}, // 91 [
{0x02,0x04,0x08,0x10,0x20}, // 92 '\'
{0x00,0x41,0x41,0x7F,0x00}, // 93 ]
{0x04,0x02,0x01,0x02,0x04}, // 94 ^
{0x40,0x40,0x40,0x40,0x40}, // 95 _
{0x00,0x01,0x02,0x04,0x00}, // 96 `
{0x20,0x54,0x54,0x54,0x78}, // 97 a
{0x7F,0x48,0x44,0x44,0x38}, // 98 b
{0x38,0x44,0x44,0x44,0x20}, // 99 c
{0x38,0x44,0x44,0x48,0x7F}, //100 d
{0x38,0x54,0x54,0x54,0x18}, //101 e
{0x08,0x7E,0x09,0x01,0x02}, //102 f
{0x0C,0x52,0x52,0x52,0x3E}, //103 g
{0x7F,0x08,0x04,0x04,0x78}, //104 h
{0x00,0x44,0x7D,0x40,0x00}, //105 i
{0x20,0x40,0x44,0x3D,0x00}, //106 j
{0x7F,0x10,0x28,0x44,0x00}, //107 k
{0x00,0x41,0x7F,0x40,0x00}, //108 l
{0x7C,0x04,0x18,0x04,0x78}, //109 m
{0x7C,0x08,0x04,0x04,0x78}, //110 n
{0x38,0x44,0x44,0x44,0x38}, //111 o
{0x7C,0x14,0x14,0x14,0x08}, //112 p
{0x08,0x14,0x14,0x18,0x7C}, //113 q
{0x7C,0x08,0x04,0x04,0x08}, //114 r
{0x48,0x54,0x54,0x54,0x20}, //115 s
{0x04,0x3F,0x44,0x40,0x20}, //116 t
{0x3C,0x40,0x40,0x20,0x7C}, //117 u
{0x1C,0x20,0x40,0x20,0x1C}, //118 v
{0x3C,0x40,0x30,0x40,0x3C}, //119 w
{0x44,0x28,0x10,0x28,0x44}, //120 x
{0x0C,0x50,0x50,0x50,0x3C}, //121 y
{0x44,0x64,0x54,0x4C,0x44}, //122 z
{0x00,0x08,0x36,0x41,0x00}, //123 {
{0x00,0x00,0x7F,0x00,0x00}, //124 |
{0x00,0x41,0x36,0x08,0x00}, //125 }
{0x08,0x04,0x08,0x10,0x08}, //126 ~
{0x00,0x00,0x00,0x00,0x00} //127
};
static inline void spi_init(void) {
PORTA.DIRSET = PIN4_bm | PIN6_bm | PIN7_bm;
PORTA.OUTSET = PIN7_bm;
PORTA.OUTCLR = PIN6_bm;
SPI0.CTRLA = SPI_ENABLE_bm | SPI_MASTER_bm | SPI_CLK2X_bm | SPI_PRESC_DIV16_gc;
SPI0.CTRLB = SPI_MODE_0_gc;
}
static inline uint8_t spi_tx(uint8_t v) {
SPI0.DATA = v;
while(!(SPI0.INTFLAGS & SPI_IF_bm)) {;}
return SPI0.DATA;
}
static inline void display_cmd(uint8_t c) {
PORTA.OUTCLR = PIN2_bm;
PORTA.OUTCLR = PIN7_bm;
spi_tx(c);
PORTA.OUTSET = PIN7_bm;
}
static inline void display_data(uint8_t d) {
PORTA.OUTSET = PIN2_bm;
PORTA.OUTCLR = PIN7_bm;
spi_tx(d);
PORTA.OUTSET = PIN7_bm;
}
static inline void display_set_xy(uint8_t x, uint8_t y) {
display_cmd(0x80 | (x & 0x7F));
display_cmd(0x40 | (y & 0x07));
}
static void display_reset_gpio_init(void) {
PORTA.DIRSET = PIN1_bm | PIN2_bm;
PORTA.OUTSET = PIN1_bm;
_delay_ms(1);
PORTA.OUTCLR = PIN1_bm; _delay_ms(5);
PORTA.OUTSET = PIN1_bm; _delay_ms(5);
}
static void display_init(void) {
spi_init();
display_reset_gpio_init();
display_cmd(0x21);
display_cmd(0xB1);
display_cmd(0x04);
display_cmd(0x14);
display_cmd(0x20);
display_cmd(0x0C);
}
static void display_clear(void) {
display_set_xy(0,0);
PORTA.OUTSET = PIN2_bm;
PORTA.OUTCLR = PIN7_bm;
for(uint16_t i=0;i<504;i++)
spi_tx(0x00);
PORTA.OUTSET = PIN7_bm;
}
static void display_char(char c) {
if (c < 32 || (uint8_t)c > 127)
c = '?';
const uint8_t *g = font5x7[c - 32];
PORTA.OUTSET = PIN2_bm;
PORTA.OUTCLR = PIN7_bm;
for (uint8_t i=0;i<5;i++)
spi_tx(g[i]);
spi_tx(0x00);
PORTA.OUTSET = PIN7_bm;
}
static void display_print(const char *s) {
while(*s)
display_char(*s++);
}
int main(void) {
display_init();
display_clear();
display_set_xy(0,0);
display_print("PCD8544");
while(1){}
}
|
