DataFlash: Spin up more battery messages

This is crazy, because it just burned 5.5% of all possible message ID's

libraries/DataFlash/LogFile.cpp

@@ -1437,20 +1437,23 @@ void DataFlash_Class::Log_Write_Current_instance(const uint64_t time_us,
 // Write an Current data packet
 void DataFlash_Class::Log_Write_Current()
 {
+    // Big painful assert to ensure that logging won't produce suprising results when the
+    // number of battery monitors changes, does have the built in expectation that
+    // LOG_COMPASS_MSG follows the last LOG_CURRENT_CELLSx_MSG
+    static_assert(((LOG_CURRENT_MSG + AP_BATT_MONITOR_MAX_INSTANCES) == LOG_CURRENT_CELLS_MSG) &&
+                  ((LOG_CURRENT_CELLS_MSG + AP_BATT_MONITOR_MAX_INSTANCES) == LOG_COMPASS_MSG),
+                  "The number of batt monitors has changed without updating the log "
+                  "table entries. Please add new enums for LOG_CURRENT_MSG, LOG_CURRENT_CELLS_MSG "
+                  "directly following the highest indexed fields. Don't forget to update the log "
+                  "description table as well.");
+
     const uint64_t time_us = AP_HAL::micros64();
     const uint8_t num_instances = AP::battery().num_instances();
-    if (num_instances >= 1) {
-        Log_Write_Current_instance(time_us,
-                                   0,
-                                   LOG_CURRENT_MSG,
-                                   LOG_CURRENT_CELLS_MSG);
-    }
-
-    if (num_instances >= 2) {
+    for (uint8_t i = 0; i < num_instances; i++) {
         Log_Write_Current_instance(time_us,
-                                   1,
-                                   LOG_CURRENT2_MSG,
-                                   LOG_CURRENT_CELLS2_MSG);
+                                   i,
+                                   (LogMessages)((uint8_t)LOG_CURRENT_MSG + i),
+                                   (LogMessages)((uint8_t)LOG_CURRENT_CELLS_MSG + i));
     }
 }
 

libraries/DataFlash/LogStructure.h

@@ -1226,10 +1226,38 @@ Format characters in the format string for binary log messages
       "BAT", CURR_FMT,CURR_LABELS,CURR_UNITS,CURR_MULTS },  \
     { LOG_CURRENT2_MSG, sizeof(log_Current), \
       "BAT2", CURR_FMT,CURR_LABELS,CURR_UNITS,CURR_MULTS }, \
+    { LOG_CURRENT3_MSG, sizeof(log_Current), \
+      "BAT3", CURR_FMT,CURR_LABELS,CURR_UNITS,CURR_MULTS }, \
+    { LOG_CURRENT4_MSG, sizeof(log_Current), \
+      "BAT4", CURR_FMT,CURR_LABELS,CURR_UNITS,CURR_MULTS }, \
+    { LOG_CURRENT5_MSG, sizeof(log_Current), \
+      "BAT5", CURR_FMT,CURR_LABELS,CURR_UNITS,CURR_MULTS }, \
+    { LOG_CURRENT6_MSG, sizeof(log_Current), \
+      "BAT6", CURR_FMT,CURR_LABELS,CURR_UNITS,CURR_MULTS }, \
+    { LOG_CURRENT7_MSG, sizeof(log_Current), \
+      "BAT7", CURR_FMT,CURR_LABELS,CURR_UNITS,CURR_MULTS }, \
+    { LOG_CURRENT8_MSG, sizeof(log_Current), \
+      "BAT8", CURR_FMT,CURR_LABELS,CURR_UNITS,CURR_MULTS }, \
+    { LOG_CURRENT9_MSG, sizeof(log_Current), \
+      "BAT9", CURR_FMT,CURR_LABELS,CURR_UNITS,CURR_MULTS }, \
     { LOG_CURRENT_CELLS_MSG, sizeof(log_Current_Cells), \
       "BCL", CURR_CELL_FMT, CURR_CELL_LABELS, CURR_CELL_UNITS, CURR_CELL_MULTS }, \
     { LOG_CURRENT_CELLS2_MSG, sizeof(log_Current_Cells), \
       "BCL2", CURR_CELL_FMT, CURR_CELL_LABELS, CURR_CELL_UNITS, CURR_CELL_MULTS }, \
+    { LOG_CURRENT_CELLS3_MSG, sizeof(log_Current_Cells), \
+      "BCL3", CURR_CELL_FMT, CURR_CELL_LABELS, CURR_CELL_UNITS, CURR_CELL_MULTS }, \
+    { LOG_CURRENT_CELLS4_MSG, sizeof(log_Current_Cells), \
+      "BCL4", CURR_CELL_FMT, CURR_CELL_LABELS, CURR_CELL_UNITS, CURR_CELL_MULTS }, \
+    { LOG_CURRENT_CELLS5_MSG, sizeof(log_Current_Cells), \
+      "BCL5", CURR_CELL_FMT, CURR_CELL_LABELS, CURR_CELL_UNITS, CURR_CELL_MULTS }, \
+    { LOG_CURRENT_CELLS6_MSG, sizeof(log_Current_Cells), \
+      "BCL6", CURR_CELL_FMT, CURR_CELL_LABELS, CURR_CELL_UNITS, CURR_CELL_MULTS }, \
+    { LOG_CURRENT_CELLS7_MSG, sizeof(log_Current_Cells), \
+      "BCL7", CURR_CELL_FMT, CURR_CELL_LABELS, CURR_CELL_UNITS, CURR_CELL_MULTS }, \
+    { LOG_CURRENT_CELLS8_MSG, sizeof(log_Current_Cells), \
+      "BCL8", CURR_CELL_FMT, CURR_CELL_LABELS, CURR_CELL_UNITS, CURR_CELL_MULTS }, \
+    { LOG_CURRENT_CELLS9_MSG, sizeof(log_Current_Cells), \
+      "BCL9", CURR_CELL_FMT, CURR_CELL_LABELS, CURR_CELL_UNITS, CURR_CELL_MULTS }, \
 	{ LOG_ATTITUDE_MSG, sizeof(log_Attitude),\
       "ATT", "QccccCCCC", "TimeUS,DesRoll,Roll,DesPitch,Pitch,DesYaw,Yaw,ErrRP,ErrYaw", "sddddhhdh", "FBBBBBBBB" }, \
     { LOG_COMPASS_MSG, sizeof(log_Compass), \
@@ -1494,8 +1522,22 @@ enum LogMessages : uint8_t {
     LOG_ATTITUDE_MSG,
     LOG_CURRENT_MSG,
     LOG_CURRENT2_MSG,
+    LOG_CURRENT3_MSG,
+    LOG_CURRENT4_MSG,
+    LOG_CURRENT5_MSG,
+    LOG_CURRENT6_MSG,
+    LOG_CURRENT7_MSG,
+    LOG_CURRENT8_MSG,
+    LOG_CURRENT9_MSG,
     LOG_CURRENT_CELLS_MSG,
     LOG_CURRENT_CELLS2_MSG,
+    LOG_CURRENT_CELLS3_MSG,
+    LOG_CURRENT_CELLS4_MSG,
+    LOG_CURRENT_CELLS5_MSG,
+    LOG_CURRENT_CELLS6_MSG,
+    LOG_CURRENT_CELLS7_MSG,
+    LOG_CURRENT_CELLS8_MSG,
+    LOG_CURRENT_CELLS9_MSG,
     LOG_COMPASS_MSG,
     LOG_COMPASS2_MSG,
     LOG_COMPASS3_MSG,