X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=betty%2Fspi.c;fp=betty%2Fspi.c;h=198213d0a2979d35628897ae3fa74595fef19bbf;hb=b4ca71fc214ba3c58cec25661ba1f81cf7b1b871;hp=0000000000000000000000000000000000000000;hpb=d6814c7408b23db8a441f731b44d4b638df24c64;p=my-code%2Farm.git

diff --git a/betty/spi.c b/betty/spi.c
new file mode 100644
index 0000000..198213d
--- /dev/null
+++ b/betty/spi.c
@@ -0,0 +1,35 @@
+/*
+ * spi.c - serial peripheral interface 0/1
+ *
+ * author: hackbard@hackdaworld.org
+ *
+ */
+
+#include "spi.h"
+
+/*
+ * functions
+ */
+
+void spi1_init(u8 width,u8 type,u8 div) {
+
+	if((width<8)|(width>16))
+		width=8;
+	if(width==16)
+		width=0;
+
+	div&=0xfe;
+	if(div<8)
+		div=8;
+
+	S1SPCR=(1<<2)|(width<<8)|(type<<5);
+	S1SPCCR=div;
+}
+
+void spi1_send(u16 data) {
+
+	S1SPDR=data;
+
+	while(!(S1SPSR&(1<<7)))
+		continue;
+}