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114 lines
2.2 KiB
114 lines
2.2 KiB
/** @file bounce1.c
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@author M. P. Hayes, UCECE
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@date 24 August 2009
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@brief Simple bouncing dot program
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@defgroup bounce1 Bounce1 application
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*/
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#include "system.h"
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#include "pacer.h"
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#include "pio.h"
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/* Define polling rate in Hz. */
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#define LOOP_RATE 10
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/* Define PIO pins driving LED matrix rows and columns. */
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static pio_t ledmat_rows[] =
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{
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LEDMAT_ROW1_PIO, LEDMAT_ROW2_PIO, LEDMAT_ROW3_PIO, LEDMAT_ROW4_PIO,
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LEDMAT_ROW5_PIO, LEDMAT_ROW6_PIO, LEDMAT_ROW7_PIO
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};
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static pio_t ledmat_cols[] =
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{
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LEDMAT_COL1_PIO, LEDMAT_COL2_PIO, LEDMAT_COL3_PIO,
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LEDMAT_COL4_PIO, LEDMAT_COL5_PIO
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};
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/** Turn single LED within matrix on or off.
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@param col LED column number
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@param row LED row number
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@param state LED state */
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static void ledmat_pixel_set (int col, int row, bool state)
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{
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if (state)
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{
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pio_output_low (ledmat_rows[row]);
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pio_output_low (ledmat_cols[col]);
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}
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else
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{
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pio_output_high (ledmat_rows[row]);
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pio_output_high (ledmat_cols[col]);
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}
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}
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/** Initialise LED matrix PIO pins. */
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static void ledmat_init (void)
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{
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uint8_t row;
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uint8_t col;
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for (row = 0; row < 7; row++)
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{
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pio_config_set (ledmat_rows[row], PIO_OUTPUT_HIGH);
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pio_output_high (ledmat_rows[row]);
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}
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for (col = 0; col < 5; col++)
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{
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pio_config_set (ledmat_cols[col], PIO_OUTPUT_HIGH);
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pio_output_high (ledmat_cols[col]);
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}
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}
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int main (void)
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{
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int row;
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int col;
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int rowinc;
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int colinc;
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system_init ();
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ledmat_init ();
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row = 3;
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col = 2;
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rowinc = 1;
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colinc = 1;
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ledmat_pixel_set (col, row, 1);
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pacer_init (LOOP_RATE);
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/* Paced loop. */
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while (1)
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{
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/* Wait for next tick. */
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pacer_wait ();
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ledmat_pixel_set (col, row, 0);
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col += colinc;
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row += rowinc;
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if (row > 6 || row < 0)
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{
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row -= rowinc * 2;
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rowinc = -rowinc;
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}
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if (col > 4 || col < 0)
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{
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col -= colinc * 2;
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colinc = -colinc;
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}
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ledmat_pixel_set (col, row, 1);
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}
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}
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