display characters on matrix

This commit is contained in:
King Kévin 2016-01-20 12:09:42 +01:00
parent e9a92f16b2
commit 51549151c6
1 changed files with 160 additions and 11 deletions

171
main.c
View File

@ -32,6 +32,9 @@
#include "usart.h" // USART utilities
#include "usb_cdcacm.h" // USB CDC ACM utilities
/* get the length of an array */
#define LENGTH(x) (sizeof(x) / sizeof((x)[0]))
/* default output (i.e. for printf) */
int _write(int file, char *ptr, int len)
{
@ -235,9 +238,10 @@ static void vfd_digit(uint8_t nb, char c)
}
if (false) { // add the comma (not encoded)
vfd_data[1] |= (1<<(16));
}
if (((c&0x7f)<' ') || ((c&0x7f)>'~')) { // unknown ASCII character
vfd_data[1] |= (ascii_7segments[' '-' ']<<(17)); // add empty segments to memory
}
if (((c&0x7f)<' ') || ((c&0x7f)>' '+LENGTH(ascii_7segments)-1)) { // unknown ASCII character
vfd_data[1] = 0; // add empty segments to memory
} else {
vfd_data[1] |= (ascii_7segments[c-' ']<<(17)); // add encoded segments to memory
}
@ -245,9 +249,120 @@ static void vfd_digit(uint8_t nb, char c)
vfd_data[2] = 0;
}
/* font for the 5x7 dot matrix display
* from http://sunge.awardspace.com/glcd-sd/node4.html
* first value is left-most line
* LSB is top dot, MSB is not used
*/
static const uint8_t ascii_font5x7[][5] = {
{0x00, 0x00, 0x00, 0x00, 0x00}, // (space)
{0x00, 0x00, 0x5F, 0x00, 0x00}, // !
{0x00, 0x07, 0x00, 0x07, 0x00}, // "
{0x14, 0x7F, 0x14, 0x7F, 0x14}, // #
{0x24, 0x2A, 0x7F, 0x2A, 0x12}, // $
{0x23, 0x13, 0x08, 0x64, 0x62}, // %
{0x36, 0x49, 0x55, 0x22, 0x50}, // &
{0x00, 0x05, 0x03, 0x00, 0x00}, // '
{0x00, 0x1C, 0x22, 0x41, 0x00}, // (
{0x00, 0x41, 0x22, 0x1C, 0x00}, // )
{0x08, 0x2A, 0x1C, 0x2A, 0x08}, // *
{0x08, 0x08, 0x3E, 0x08, 0x08}, // +
{0x00, 0x50, 0x30, 0x00, 0x00}, // ,
{0x08, 0x08, 0x08, 0x08, 0x08}, // -
{0x00, 0x60, 0x60, 0x00, 0x00}, // .
{0x20, 0x10, 0x08, 0x04, 0x02}, // /
{0x3E, 0x51, 0x49, 0x45, 0x3E}, // 0
{0x00, 0x42, 0x7F, 0x40, 0x00}, // 1
{0x42, 0x61, 0x51, 0x49, 0x46}, // 2
{0x21, 0x41, 0x45, 0x4B, 0x31}, // 3
{0x18, 0x14, 0x12, 0x7F, 0x10}, // 4
{0x27, 0x45, 0x45, 0x45, 0x39}, // 5
{0x3C, 0x4A, 0x49, 0x49, 0x30}, // 6
{0x01, 0x71, 0x09, 0x05, 0x03}, // 7
{0x36, 0x49, 0x49, 0x49, 0x36}, // 8
{0x06, 0x49, 0x49, 0x29, 0x1E}, // 9
{0x00, 0x36, 0x36, 0x00, 0x00}, // :
{0x00, 0x56, 0x36, 0x00, 0x00}, // ;
{0x00, 0x08, 0x14, 0x22, 0x41}, // <
{0x14, 0x14, 0x14, 0x14, 0x14}, // =
{0x41, 0x22, 0x14, 0x08, 0x00}, // >
{0x02, 0x01, 0x51, 0x09, 0x06}, // ?
{0x32, 0x49, 0x79, 0x41, 0x3E}, // @
{0x7E, 0x11, 0x11, 0x11, 0x7E}, // A
{0x7F, 0x49, 0x49, 0x49, 0x36}, // B
{0x3E, 0x41, 0x41, 0x41, 0x22}, // C
{0x7F, 0x41, 0x41, 0x22, 0x1C}, // D
{0x7F, 0x49, 0x49, 0x49, 0x41}, // E
{0x7F, 0x09, 0x09, 0x01, 0x01}, // F
{0x3E, 0x41, 0x41, 0x51, 0x32}, // G
{0x7F, 0x08, 0x08, 0x08, 0x7F}, // H
{0x00, 0x41, 0x7F, 0x41, 0x00}, // I
{0x20, 0x40, 0x41, 0x3F, 0x01}, // J
{0x7F, 0x08, 0x14, 0x22, 0x41}, // K
{0x7F, 0x40, 0x40, 0x40, 0x40}, // L
{0x7F, 0x02, 0x04, 0x02, 0x7F}, // M
{0x7F, 0x04, 0x08, 0x10, 0x7F}, // N
{0x3E, 0x41, 0x41, 0x41, 0x3E}, // O
{0x7F, 0x09, 0x09, 0x09, 0x06}, // P
{0x3E, 0x41, 0x51, 0x21, 0x5E}, // Q
{0x7F, 0x09, 0x19, 0x29, 0x46}, // R
{0x46, 0x49, 0x49, 0x49, 0x31}, // S
{0x01, 0x01, 0x7F, 0x01, 0x01}, // T
{0x3F, 0x40, 0x40, 0x40, 0x3F}, // U
{0x1F, 0x20, 0x40, 0x20, 0x1F}, // V
{0x7F, 0x20, 0x18, 0x20, 0x7F}, // W
{0x63, 0x14, 0x08, 0x14, 0x63}, // X
{0x03, 0x04, 0x78, 0x04, 0x03}, // Y
{0x61, 0x51, 0x49, 0x45, 0x43}, // Z
{0x00, 0x00, 0x7F, 0x41, 0x41}, // [
{0x02, 0x04, 0x08, 0x10, 0x20}, // '\'
{0x41, 0x41, 0x7F, 0x00, 0x00}, // ]
{0x04, 0x02, 0x01, 0x02, 0x04}, // ^
{0x40, 0x40, 0x40, 0x40, 0x40}, // _
{0x00, 0x01, 0x02, 0x04, 0x00}, // `
{0x20, 0x54, 0x54, 0x54, 0x78}, // a
{0x7F, 0x48, 0x44, 0x44, 0x38}, // b
{0x38, 0x44, 0x44, 0x44, 0x20}, // c
{0x38, 0x44, 0x44, 0x48, 0x7F}, // d
{0x38, 0x54, 0x54, 0x54, 0x18}, // e
{0x08, 0x7E, 0x09, 0x01, 0x02}, // f
{0x08, 0x14, 0x54, 0x54, 0x3C}, // g
{0x7F, 0x08, 0x04, 0x04, 0x78}, // h
{0x00, 0x44, 0x7D, 0x40, 0x00}, // i
{0x20, 0x40, 0x44, 0x3D, 0x00}, // j
{0x00, 0x7F, 0x10, 0x28, 0x44}, // k
{0x00, 0x41, 0x7F, 0x40, 0x00}, // l
{0x7C, 0x04, 0x18, 0x04, 0x78}, // m
{0x7C, 0x08, 0x04, 0x04, 0x78}, // n
{0x38, 0x44, 0x44, 0x44, 0x38}, // o
{0x7C, 0x14, 0x14, 0x14, 0x08}, // p
{0x08, 0x14, 0x14, 0x18, 0x7C}, // q
{0x7C, 0x08, 0x04, 0x04, 0x08}, // r
{0x48, 0x54, 0x54, 0x54, 0x20}, // s
{0x04, 0x3F, 0x44, 0x40, 0x20}, // t
{0x3C, 0x40, 0x40, 0x20, 0x7C}, // u
{0x1C, 0x20, 0x40, 0x20, 0x1C}, // v
{0x3C, 0x40, 0x30, 0x40, 0x3C}, // w
{0x44, 0x28, 0x10, 0x28, 0x44}, // x
{0x0C, 0x50, 0x50, 0x50, 0x3C}, // y
{0x44, 0x64, 0x54, 0x4C, 0x44}, // z
{0x00, 0x08, 0x36, 0x41, 0x00}, // {
{0x00, 0x00, 0x7F, 0x00, 0x00}, // |
{0x00, 0x41, 0x36, 0x08, 0x00}, // }
{0b00001000, 0b00000100, 0b00001100, 0b00001000, 0b00000100} // ~
};
/* pictures for the 5x7 dot matrix display
* first value is left-most line
* LSB is top dot, MSB is not used
*/
static const uint8_t ascii_pict5x7[][5] = {
{0x08, 0x08, 0x2A, 0x1C, 0x08}, // ->
{0x08, 0x1C, 0x2A, 0x08, 0x08} // <-
};
static void vfd_matrix(uint8_t nb, char c)
{
(void)c;
// there are only 12 matrix
if (nb>11) {
return;
@ -259,8 +374,30 @@ static void vfd_matrix(uint8_t nb, char c)
vfd_data[1] = 0;
}
vfd_data[1] |= 0xff000000;
vfd_data[2] = 0xffffffff;
if (c<0x80) {
uint8_t i = c-' ';
vfd_data[2] = 0;
if (i<LENGTH(ascii_font5x7)) {
vfd_data[1] |= ascii_font5x7[i][0]<<24;
vfd_data[2] |= ascii_font5x7[i][1]<<0;
vfd_data[2] |= ascii_font5x7[i][2]<<8;
vfd_data[2] |= ascii_font5x7[i][3]<<16;
vfd_data[2] |= ascii_font5x7[i][4]<<24;
}
} else {
uint8_t i = c-0x80;
vfd_data[2] = 0;
if (i<LENGTH(ascii_pict5x7)) {
vfd_data[2] = 0;
vfd_data[1] |= ascii_pict5x7[i][0]<<24;
vfd_data[2] |= ascii_pict5x7[i][1]<<0;
vfd_data[2] |= ascii_pict5x7[i][2]<<8;
vfd_data[2] |= ascii_pict5x7[i][3]<<16;
vfd_data[2] |= ascii_pict5x7[i][4]<<24;
} else {
vfd_data[2] = 0;
}
}
}
int main(void)
@ -283,8 +420,17 @@ int main(void)
bool vfd_transmit = false;
uint8_t digit = 0;
uint8_t c = 0;
vfd_digit(0,0);
uint8_t matrix = 0;
char c = ' ';
vfd_digit(digit,c);
vfd_shift();
digit = (digit+1)%10;
// let the fluorescence glow up a bit
for (uint32_t i = 0; i < 0x2000; i++) {
__asm__("nop");
}
/* blink the LED with every transmitted character */
while (1) {
while (usart_received) { // echo every received character
@ -299,14 +445,17 @@ int main(void)
}
while (vfd_transmit) {
vfd_transmit = false;
c = digit+'0';
vfd_matrix(digit,c);
printf("%u: %c\n", matrix, c);
vfd_matrix(matrix,c);
vfd_shift();
digit = (digit+1)%12;
// let the fluorescence glow up a bit
for (uint32_t i = 0; i < 0x2000; i++) {
__asm__("nop");
}
matrix = (matrix+1)%12;
c++;
}
__WFI(); // go to sleep
}