X-Git-Url: https://git.kernelconcepts.de/?p=metawatch.git;a=blobdiff_plain;f=metawatch.c;h=348140a49c52920e068a876c190cc1a2f3410c98;hp=f4ad1d1f09277230c473f3bc5761089bcf94dff4;hb=59068bbd135c3d2ed046be5fd64850166ca04a5c;hpb=fc1c62b9c0c3395297f2871028516a62d5effa19;ds=sidebyside

diff --git a/metawatch.c b/metawatch.c
index f4ad1d1..348140a 100644
--- a/metawatch.c
+++ b/metawatch.c
@@ -182,6 +182,47 @@ void mw_write_buffer(int mw_fd,
 	mw_send_frame(mw_fd, MW_WRITE_BUFFER, (mode & 0x0f) | (((numlines & 0x01)<< 4) & 0x10), mdata, numlines ? 13 : 26);
 }
 
+/*
+   Options:
+	B0   : row select, 0 first row, 1 second row
+	B1   : display select, 0 upper OLED, 1 lower OLED
+	B2   : if 1 send an event upon completion
+	B3..4: scroll type,
+	B5..7: unused
+   Scroll types:
+   	B0: First buffer in a chain of scroll buffers
+   	B1: Any buffer except first or last
+   	B2: Last buffer of a chain
+   	B3: reserved / unused
+   Payload:
+   	0: Start index col
+   	1..: data
+*/
+void mw_write_oled_buffer(int mw_fd,
+	unsigned char mode, /* idle or scroll */
+	unsigned char oled, /* which OLED */
+	unsigned char numcols,
+	unsigned char col_index, /* starting index */
+	unsigned char *buffer, int buflen)
+{
+	unsigned char mdata[32];
+	int i;
+	
+	/* lower row first since display wil be updated after completion of upper row */
+	if (buflen > 80) {
+		for (i=80; i<buflen; i+=20) {
+			mdata[0] = (i-80);
+			memcpy((mdata+1), (buffer+i), 20);
+			mw_send_frame(mw_fd, MW_WRITE_OLED_IDLE_DISPLAY_MSG, 0 | (oled ? 2 : 0), mdata, 21);
+		}
+	}
+	for (i=0; i<80; i+=20) {
+		mdata[0] = i;
+		memcpy((mdata+1), (buffer+i), 20);
+		mw_send_frame(mw_fd, MW_WRITE_OLED_IDLE_DISPLAY_MSG, 1 | (oled ? 2 : 0), mdata, 21);
+	}
+}
+
 void mw_enable_button(int mw_fd,
 		unsigned char mode,
 		unsigned char button_index,