1 files changed, 38 insertions, 0 deletions
diff --git a/recipes-demo/de10-nano-fftsw-apps/files/create_real_short_sine32.c b/recipes-demo/de10-nano-fftsw-apps/files/create_real_short_sine32.c
new file mode 100644
index 0000000..3cc0780
--- /dev/null
+++ b/recipes-demo/de10-nano-fftsw-apps/files/create_real_short_sine32.c
@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <limits.h>
+#include <error.h>
+#include <errno.h>
+#include <math.h>
+
+#define SAMPLES_PER_PERIOD	(32)
+static short waveform_array[SAMPLES_PER_PERIOD];
+
+int main(void) {
+
+	int i;
+	int result;
+	short wave_temp;
+	float next_point = M_PI / 2;
+	float next_increment = (2 * M_PI) / SAMPLES_PER_PERIOD;
+	
+	wave_temp = SHRT_MAX;
+	for(i = 0 ; i < (SAMPLES_PER_PERIOD) ; i++) {
+
+		wave_temp = SHRT_MAX * sin(next_point);
+		waveform_array[i] = wave_temp;
+		next_point += next_increment;
+	}
+
+	result = write(STDOUT_FILENO, &waveform_array, sizeof(waveform_array));
+	if (result < 0) {
+		error(1, errno, "writing to stdout");
+	}
+	
+	if (result != sizeof(waveform_array)) {
+		error(1, 0, "failed to write %d bytes to stdout, only wrote %d bytes", sizeof(waveform_array), result);
+	}
+	
+	return 0;
+}
+