X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;f=firmware%2Fmodbus.h;fp=firmware%2Fmodbus.h;h=3a3fcdf28e6fed2db6f6e929049b68b33d64a8ee;hb=087a60aae1ad8d3f96f94601c68910154f884735;hp=e762b706a5173542f795e15eb8cdd16674d21eb8;hpb=d8f201d671212ce6ea71de49e852776e5f03f4e7;p=openparking.git

diff --git a/firmware/modbus.h b/firmware/modbus.h
index e762b70..3a3fcdf 100644
--- a/firmware/modbus.h
+++ b/firmware/modbus.h
@@ -27,11 +27,11 @@ typedef enum {
 	MB_ILLEGAL_VAL  = 3,
 } mb_exception;
 
-#define MB_HOLD_REGS_BASE	1000
-#define MB_N_HOLD_REGS		60
-#define MB_N_HOLD_REGS_EEPROM	20
+#define MB_HOLD_REGS_BASE	0	// first register
+#define MB_N_HOLD_REGS		80	// total # of registers
+#define MB_N_HOLD_REGS_EEPROM	20	// the first N registers eeprom-backed
 extern uint16_t hold_regs[MB_N_HOLD_REGS];
-#define mb_unit_id	(hold_regs[0])
+#define mb_unit_id	(hold_regs[0])	// MODBUS id in the first register
 
 uint8_t hold_reg_is_valid(uint16_t reg, uint16_t val);