--- /dev/null
+/*
+ * Author: Michael Ring <mail@michael-ring.org>
+ * Author: Thomas Ingleby <thomas.c.ingleby@intel.com>
+ * Copyright (c) 2014 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "mraa.h"
+#include <unistd.h>
+#include <stdint.h>
+
+int
+main(int argc, char **argv) {
+//! [Interesting]
+ mraa_spi_context spi;
+ spi = mraa_spi_init(1);
+ if (spi == NULL) {
+ printf("Initialization of spi failed, check syslog for details, exit...\n");
+ exit(1);
+ }
+
+ printf("SPI initialised successfully\n");
+
+ mraa_spi_frequency(spi, 400000);
+ mraa_spi_lsbmode(spi, 0);
+
+ // The MAX7219/21 Chip needs the data in word size
+ if (mraa_spi_bit_per_word(spi, 16) != MRAA_SUCCESS) {
+ printf("Could not set SPI Device to 16Bit mode, exit...\n");
+ exit(1);
+ };
+
+ mraa_spi_write_word(spi, 0x0900); // Do not decode bits
+ mraa_spi_write_word(spi, 0x0a05); // Brightness of LEDs
+ mraa_spi_write_word(spi, 0x0b07); // Show all Scan Lines
+ mraa_spi_write_word(spi, 0x0c01); // Display on
+ mraa_spi_write_word(spi, 0x0f00); // Testmode off
+
+ // Display Pattern on the display
+ uint16_t dataAA55[] = {0x01aa, 0x0255, 0x03aa, 0x0455, 0x05aa, 0x0655, 0x07aa, 0x0855};
+ mraa_spi_write_buf_word(spi, dataAA55, 16);
+
+ sleep(2);
+
+ // Display inverted Pattern
+ uint16_t data55AA[] = {0x0155, 0x02aa, 0x0355, 0x04aa, 0x0555, 0x06aa, 0x0755, 0x08aa};
+ mraa_spi_write_buf_word(spi, data55AA, 16);
+
+ sleep(2);
+
+ // Clear the display
+ uint16_t data[] = {0x0100, 0x0200, 0x0300, 0x0400, 0x0500, 0x0600, 0x0700, 0x0800};
+ mraa_spi_write_buf_word(spi, data, 16);
+
+ int i;
+ int j;
+ // cycle through all LED's
+ for (i = 1; i <= 8; i++) {
+ for (j = 0; j < 8; j++) {
+ mraa_spi_write_word(spi, (i << 8) + (1 << j));
+ sleep(1);
+ }
+ mraa_spi_write_word(spi, i << 8);
+ }
+
+ mraa_spi_stop(spi);
+
+//! [Interesting]
+}