From 3f96783eba8768109b449e0aebed67052e832661 Mon Sep 17 00:00:00 2001
From: Lenczu Vex <kuba.lenczowski03@gmail.com>
Date: Sun, 13 Oct 2024 00:37:05 +0200
Subject: Fixes and some redesign

---
 ibus.c | 45 +++++++++++++++++----------------------------
 ibus.h | 12 +++++++++---
 2 files changed, 26 insertions(+), 31 deletions(-)

diff --git a/ibus.c b/ibus.c
index 217e6ca..3d7a8d0 100644
--- a/ibus.c
+++ b/ibus.c
@@ -1,37 +1,26 @@
 #include "ibus.h"
 
+uint16_t CRC16Gen(*IBusFrame frame){
+	uint16_t checksum = 0xFFFF;
+	for (int i = 2; i < frame[0]-2; i++) {
+		checksum -= ibusPacket[i];
+	}
+
+	return checksum;
+}
+
 int encodeIBus(*IBusFrame frame, *channelValues vals){
-	*frame=startByteAlpha;
-	*(frame+1)=startByteAlpha;
+	*frame=IBusSize;
+	*(frame+1)=startByteBeta;
 	for (int i=0; i<channelC*2; i++){
 		if (i%2)
-			*(frame+i+2)=(char) (*(vals+(i/2)))>>sizeof(char);
+			*(frame+i+2)=(uint8_t) (*(vals+(i/2)))>>sizeof(uint8_t);
 		else
-			*(frame+i+2)=(char) *(vals+(i/2));
-	
+			*(frame+i+2)=(uint8_t) (*(vals+(i/2)) & 0xFF);
+	}
+	uint16_t checksum=CRC16Gen(frame);
+	*(frame+frame[0]-2)=(uint8_t)(checksum & 0xFF)
+	*(frame+frame[0]-1)=(uint8_t)(checksum>>8)
 	
 }
 
-int CRC16Gen(*IBusFrame frame){
-	unsigned char i;
-	unsigned int data;
-	unsigned int crc = 0xffff;
-
-	if (length == 0)
-		return (~crc);
-
-	do{
-		for (i=0, data=(unsigned int)0xff & *data_p++;i < 8; i++, data >>= 1){
-			if ((crc & 0x0001) ^ (data & 0x0001))
-				crc = (crc >> 1) ^ POLY;
-			else
-				crc >>= 1;
-		}
-	} while (--length);
-
-	crc = ~crc;
-	data = crc;
-	crc = (crc << 8) | (data >> 8 & 0xff);
-
-	return (crc);
-}
diff --git a/ibus.h b/ibus.h
index 3be61c8..fb1d7fb 100644
--- a/ibus.h
+++ b/ibus.h
@@ -1,7 +1,13 @@
+#ifndef IBUS_H
+#define IBUS_H
+
+#include <stdint.h>
+
 #define IBusSize 34
 #define channelC 15
-#define startByteAlpha 0x20
+#define IBusSize 0x20
 #define startByteBeta 0x40
 
-typedef char[IBusSize] IBusFrame
-typedef unsigned short int[15] channelValues
+typedef uint8_t[IBusSize] IBusFrame
+typedef uint16_t[15] channelValues
+#endif
-- 
cgit v1.2.3-70-g09d2