first release

1 files changed, 71 insertions, 0 deletions

diff --git a/sm485.h b/sm485.h
new file mode 100644
index 0000000..40d9fdb
--- /dev/null
+++ b/sm485.h
@@ -0,0 +1,71 @@
+//VSD SM485 bus definitions
+
+#ifndef SM485_H
+#define SM485_H
+
+//SERIAL COMMANDS
+#define SM485_CRCINIT 0x0
+#define SM485_BUFSIZE 128
+#define SM485_RSBUFSIZE 128
+#define SM485_CMDBUFSIZE 4096
+
+//cmd number must be 0-31
+
+#define SM485_VERSION 90
+#define SM485_VERSION_COMPAT 85
+
+#define SM485_MAX_PAYLOAD_BYTES 120
+
+//00xb
+#define SMCMD_MASK_0_PARAMS 0
+//01xb, 2 bytes as payload
+#define SMCMD_MASK_2_PARAMS 2
+//10xb
+#define SMCMD_MASK_N_PARAMS 4
+//11xb
+#define SMCMD_MASK_RESERVED 6
+//xx1b
+#define SMCMD_MASK_RETURN 1
+//110b
+#define SMCMD_MASK_PARAMS_BITS 6
+
+
+#define SMCMD_ID(cmdnumber, flags) (((cmdnumber)<<3)|flags)
+
+//format 5, u8 bytesfollowing,u8 toaddr,cmddata,u16 crc
+//return, 6, u8 bytesfollowing,u8 fromaddr, returndata,u16 crc
+#define SMCMD_INSTANT_CMD SMCMD_ID(4,SMCMD_MASK_N_PARAMS)
+#define SMCMD_INSTANT_CMD_RET SMCMD_ID(4,SMCMD_MASK_N_PARAMS|SMCMD_MASK_RETURN)
+
+//format  ID, u8 bytesfollowing,u8 toaddr,cmddata,u16 crc
+//return, ID, u8 bytesfollowing,u8 fromaddr,returndata,u16 crc
+#define SMCMD_BUFFERED_CMD SMCMD_ID(6,SMCMD_MASK_N_PARAMS)
+#define SMCMD_BUFFERED_CMD_RET SMCMD_ID(6,SMCMD_MASK_N_PARAMS|SMCMD_MASK_RETURN)
+
+//read return data from buffered cmds. repeat this command before SMCMD_BUFFERED_CMD until N!=120 from download
+#define SMCMD_BUFFERED_RETURN_DATA SMCMD_ID(7,SMCMD_MASK_0_PARAMS)
+#define SMCMD_BUFFERED_RETURN_DATA_RET SMCMD_ID(7,SMCMD_MASK_N_PARAMS|SMCMD_MASK_RETURN)
+
+//cmd 20,u8 toaddr, u8 crc
+//ret 21, u8=2, u8 fromaddr, u16 clock,u16 crc, muut clientit lukee t?n
+//oldret 21, u8 fromaddr, u16 clock,u16 crc, muut clientit lukee t?n
+#define SMCMD_GET_CLOCK SMCMD_ID(10,SMCMD_MASK_0_PARAMS)
+#define SMCMD_GET_CLOCK_RET SMCMD_ID(10,SMCMD_MASK_2_PARAMS|SMCMD_MASK_RETURN)
+
+#ifdef PROCESS_IMAGE_SUPPORT
+
+//PROCESS_IMAGE communication not supported by SM V2.0.0. placeholders here
+
+//upload process data to bus devices. each device knows it's data offset in payload
+//(set by SMREGISTER_PDATA_IN_OFFSET, which is 0xffff if not accepting anything)
+#define SMCMD_PROCESS_IMAGE SMCMD_ID(5,SMCMD_MASK_N_PARAMS)
+
+//retrun of feedback process data is the tricky part
+//the device that has process data address of 0 answers first including SMCMD header (3bytes) and then its own return process data
+//SMREGISTER_PDATA_OUT_OFFSET is location of device's return processdata
+#define SMCMD_PROCESS_IMAGE_RET SMCMD_ID(5,SMCMD_MASK_N_PARAMS|SMCMD_MASK_RETURN)
+
+#endif
+
+
+#endif