display characters on matrix
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e9a92f16b2
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51549151c6
171
main.c
171
main.c
@ -32,6 +32,9 @@
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#include "usart.h" // USART utilities
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#include "usb_cdcacm.h" // USB CDC ACM utilities
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/* get the length of an array */
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#define LENGTH(x) (sizeof(x) / sizeof((x)[0]))
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/* default output (i.e. for printf) */
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int _write(int file, char *ptr, int len)
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{
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@ -235,9 +238,10 @@ static void vfd_digit(uint8_t nb, char c)
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}
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if (false) { // add the comma (not encoded)
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vfd_data[1] |= (1<<(16));
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}
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if (((c&0x7f)<' ') || ((c&0x7f)>'~')) { // unknown ASCII character
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vfd_data[1] |= (ascii_7segments[' '-' ']<<(17)); // add empty segments to memory
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}
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if (((c&0x7f)<' ') || ((c&0x7f)>' '+LENGTH(ascii_7segments)-1)) { // unknown ASCII character
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vfd_data[1] = 0; // add empty segments to memory
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} else {
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vfd_data[1] |= (ascii_7segments[c-' ']<<(17)); // add encoded segments to memory
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}
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@ -245,9 +249,120 @@ static void vfd_digit(uint8_t nb, char c)
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vfd_data[2] = 0;
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}
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/* font for the 5x7 dot matrix display
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* from http://sunge.awardspace.com/glcd-sd/node4.html
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* first value is left-most line
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* LSB is top dot, MSB is not used
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*/
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static const uint8_t ascii_font5x7[][5] = {
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{0x00, 0x00, 0x00, 0x00, 0x00}, // (space)
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{0x00, 0x00, 0x5F, 0x00, 0x00}, // !
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{0x00, 0x07, 0x00, 0x07, 0x00}, // "
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{0x14, 0x7F, 0x14, 0x7F, 0x14}, // #
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{0x24, 0x2A, 0x7F, 0x2A, 0x12}, // $
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{0x23, 0x13, 0x08, 0x64, 0x62}, // %
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{0x36, 0x49, 0x55, 0x22, 0x50}, // &
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{0x00, 0x05, 0x03, 0x00, 0x00}, // '
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{0x00, 0x1C, 0x22, 0x41, 0x00}, // (
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{0x00, 0x41, 0x22, 0x1C, 0x00}, // )
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{0x08, 0x2A, 0x1C, 0x2A, 0x08}, // *
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{0x08, 0x08, 0x3E, 0x08, 0x08}, // +
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{0x00, 0x50, 0x30, 0x00, 0x00}, // ,
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{0x08, 0x08, 0x08, 0x08, 0x08}, // -
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{0x00, 0x60, 0x60, 0x00, 0x00}, // .
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{0x20, 0x10, 0x08, 0x04, 0x02}, // /
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{0x3E, 0x51, 0x49, 0x45, 0x3E}, // 0
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{0x00, 0x42, 0x7F, 0x40, 0x00}, // 1
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{0x42, 0x61, 0x51, 0x49, 0x46}, // 2
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{0x21, 0x41, 0x45, 0x4B, 0x31}, // 3
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{0x18, 0x14, 0x12, 0x7F, 0x10}, // 4
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{0x27, 0x45, 0x45, 0x45, 0x39}, // 5
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{0x3C, 0x4A, 0x49, 0x49, 0x30}, // 6
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{0x01, 0x71, 0x09, 0x05, 0x03}, // 7
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{0x36, 0x49, 0x49, 0x49, 0x36}, // 8
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{0x06, 0x49, 0x49, 0x29, 0x1E}, // 9
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{0x00, 0x36, 0x36, 0x00, 0x00}, // :
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{0x00, 0x56, 0x36, 0x00, 0x00}, // ;
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{0x00, 0x08, 0x14, 0x22, 0x41}, // <
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{0x14, 0x14, 0x14, 0x14, 0x14}, // =
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{0x41, 0x22, 0x14, 0x08, 0x00}, // >
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{0x02, 0x01, 0x51, 0x09, 0x06}, // ?
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{0x32, 0x49, 0x79, 0x41, 0x3E}, // @
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{0x7E, 0x11, 0x11, 0x11, 0x7E}, // A
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{0x7F, 0x49, 0x49, 0x49, 0x36}, // B
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{0x3E, 0x41, 0x41, 0x41, 0x22}, // C
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{0x7F, 0x41, 0x41, 0x22, 0x1C}, // D
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{0x7F, 0x49, 0x49, 0x49, 0x41}, // E
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{0x7F, 0x09, 0x09, 0x01, 0x01}, // F
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{0x3E, 0x41, 0x41, 0x51, 0x32}, // G
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{0x7F, 0x08, 0x08, 0x08, 0x7F}, // H
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{0x00, 0x41, 0x7F, 0x41, 0x00}, // I
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{0x20, 0x40, 0x41, 0x3F, 0x01}, // J
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{0x7F, 0x08, 0x14, 0x22, 0x41}, // K
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{0x7F, 0x40, 0x40, 0x40, 0x40}, // L
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{0x7F, 0x02, 0x04, 0x02, 0x7F}, // M
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{0x7F, 0x04, 0x08, 0x10, 0x7F}, // N
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{0x3E, 0x41, 0x41, 0x41, 0x3E}, // O
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{0x7F, 0x09, 0x09, 0x09, 0x06}, // P
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{0x3E, 0x41, 0x51, 0x21, 0x5E}, // Q
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{0x7F, 0x09, 0x19, 0x29, 0x46}, // R
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{0x46, 0x49, 0x49, 0x49, 0x31}, // S
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{0x01, 0x01, 0x7F, 0x01, 0x01}, // T
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{0x3F, 0x40, 0x40, 0x40, 0x3F}, // U
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{0x1F, 0x20, 0x40, 0x20, 0x1F}, // V
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{0x7F, 0x20, 0x18, 0x20, 0x7F}, // W
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{0x63, 0x14, 0x08, 0x14, 0x63}, // X
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{0x03, 0x04, 0x78, 0x04, 0x03}, // Y
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{0x61, 0x51, 0x49, 0x45, 0x43}, // Z
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{0x00, 0x00, 0x7F, 0x41, 0x41}, // [
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{0x02, 0x04, 0x08, 0x10, 0x20}, // '\'
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{0x41, 0x41, 0x7F, 0x00, 0x00}, // ]
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{0x04, 0x02, 0x01, 0x02, 0x04}, // ^
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{0x40, 0x40, 0x40, 0x40, 0x40}, // _
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{0x00, 0x01, 0x02, 0x04, 0x00}, // `
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{0x20, 0x54, 0x54, 0x54, 0x78}, // a
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{0x7F, 0x48, 0x44, 0x44, 0x38}, // b
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{0x38, 0x44, 0x44, 0x44, 0x20}, // c
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{0x38, 0x44, 0x44, 0x48, 0x7F}, // d
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{0x38, 0x54, 0x54, 0x54, 0x18}, // e
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{0x08, 0x7E, 0x09, 0x01, 0x02}, // f
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{0x08, 0x14, 0x54, 0x54, 0x3C}, // g
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{0x7F, 0x08, 0x04, 0x04, 0x78}, // h
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{0x00, 0x44, 0x7D, 0x40, 0x00}, // i
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{0x20, 0x40, 0x44, 0x3D, 0x00}, // j
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{0x00, 0x7F, 0x10, 0x28, 0x44}, // k
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{0x00, 0x41, 0x7F, 0x40, 0x00}, // l
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{0x7C, 0x04, 0x18, 0x04, 0x78}, // m
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{0x7C, 0x08, 0x04, 0x04, 0x78}, // n
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{0x38, 0x44, 0x44, 0x44, 0x38}, // o
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{0x7C, 0x14, 0x14, 0x14, 0x08}, // p
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{0x08, 0x14, 0x14, 0x18, 0x7C}, // q
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{0x7C, 0x08, 0x04, 0x04, 0x08}, // r
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{0x48, 0x54, 0x54, 0x54, 0x20}, // s
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{0x04, 0x3F, 0x44, 0x40, 0x20}, // t
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{0x3C, 0x40, 0x40, 0x20, 0x7C}, // u
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{0x1C, 0x20, 0x40, 0x20, 0x1C}, // v
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{0x3C, 0x40, 0x30, 0x40, 0x3C}, // w
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{0x44, 0x28, 0x10, 0x28, 0x44}, // x
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{0x0C, 0x50, 0x50, 0x50, 0x3C}, // y
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{0x44, 0x64, 0x54, 0x4C, 0x44}, // z
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{0x00, 0x08, 0x36, 0x41, 0x00}, // {
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{0x00, 0x00, 0x7F, 0x00, 0x00}, // |
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{0x00, 0x41, 0x36, 0x08, 0x00}, // }
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{0b00001000, 0b00000100, 0b00001100, 0b00001000, 0b00000100} // ~
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};
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/* pictures for the 5x7 dot matrix display
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* first value is left-most line
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* LSB is top dot, MSB is not used
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*/
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static const uint8_t ascii_pict5x7[][5] = {
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{0x08, 0x08, 0x2A, 0x1C, 0x08}, // ->
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{0x08, 0x1C, 0x2A, 0x08, 0x08} // <-
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};
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static void vfd_matrix(uint8_t nb, char c)
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{
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(void)c;
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// there are only 12 matrix
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if (nb>11) {
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return;
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@ -259,8 +374,30 @@ static void vfd_matrix(uint8_t nb, char c)
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vfd_data[1] = 0;
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}
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vfd_data[1] |= 0xff000000;
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vfd_data[2] = 0xffffffff;
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if (c<0x80) {
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uint8_t i = c-' ';
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vfd_data[2] = 0;
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if (i<LENGTH(ascii_font5x7)) {
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vfd_data[1] |= ascii_font5x7[i][0]<<24;
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vfd_data[2] |= ascii_font5x7[i][1]<<0;
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vfd_data[2] |= ascii_font5x7[i][2]<<8;
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vfd_data[2] |= ascii_font5x7[i][3]<<16;
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vfd_data[2] |= ascii_font5x7[i][4]<<24;
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}
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} else {
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uint8_t i = c-0x80;
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vfd_data[2] = 0;
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if (i<LENGTH(ascii_pict5x7)) {
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vfd_data[2] = 0;
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vfd_data[1] |= ascii_pict5x7[i][0]<<24;
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vfd_data[2] |= ascii_pict5x7[i][1]<<0;
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vfd_data[2] |= ascii_pict5x7[i][2]<<8;
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vfd_data[2] |= ascii_pict5x7[i][3]<<16;
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vfd_data[2] |= ascii_pict5x7[i][4]<<24;
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} else {
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vfd_data[2] = 0;
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}
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}
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}
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int main(void)
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@ -283,8 +420,17 @@ int main(void)
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bool vfd_transmit = false;
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uint8_t digit = 0;
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uint8_t c = 0;
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vfd_digit(0,0);
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uint8_t matrix = 0;
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char c = ' ';
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vfd_digit(digit,c);
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vfd_shift();
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digit = (digit+1)%10;
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// let the fluorescence glow up a bit
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for (uint32_t i = 0; i < 0x2000; i++) {
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__asm__("nop");
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}
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/* blink the LED with every transmitted character */
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while (1) {
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while (usart_received) { // echo every received character
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@ -299,14 +445,17 @@ int main(void)
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}
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while (vfd_transmit) {
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vfd_transmit = false;
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c = digit+'0';
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vfd_matrix(digit,c);
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printf("%u: %c\n", matrix, c);
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vfd_matrix(matrix,c);
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vfd_shift();
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digit = (digit+1)%12;
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// let the fluorescence glow up a bit
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for (uint32_t i = 0; i < 0x2000; i++) {
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__asm__("nop");
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}
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matrix = (matrix+1)%12;
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c++;
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}
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__WFI(); // go to sleep
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}
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