output drivers: add option to generate a separate output range reversing param

Makes it a bit easier to configure. Reversing by setting MIN > MAX is still
supported.

Tools/module_config/generate_actuators_metadata.py

@@ -130,7 +130,8 @@ def get_actuator_output(yaml_config, output_functions, timer_config_file, verbos
         return None
 
 
-    output_groups = yaml_config['actuator_output']['output_groups']
+    actuator_output_yaml = yaml_config['actuator_output']
+    output_groups = actuator_output_yaml['output_groups']
     module_name = process_module_name(yaml_config['module_name'])
     group_idx = 0
 
@@ -139,8 +140,9 @@ def get_actuator_output(yaml_config, output_functions, timer_config_file, verbos
     actuator_output = {
             'label': module_name
         }
-    if 'show_subgroups_if' in yaml_config['actuator_output']:
-        actuator_output['show-subgroups-if'] = yaml_config['actuator_output']['show_subgroups_if']
+    if 'show_subgroups_if' in actuator_output_yaml:
+        actuator_output['show-subgroups-if'] = actuator_output_yaml['show_subgroups_if']
+    add_reverse_range_param = actuator_output_yaml.get('add_reverse_range_param', False)
 
     # config parameters
     def get_config_params(param_list):
@@ -159,7 +161,7 @@ def get_actuator_output(yaml_config, output_functions, timer_config_file, verbos
             parameters.append(param)
         return parameters
 
-    parameters = get_config_params(yaml_config['actuator_output'].get('config_parameters', []))
+    parameters = get_config_params(actuator_output_yaml.get('config_parameters', []))
     if len(parameters) > 0:
         actuator_output['parameters'] = parameters
 
@@ -254,6 +256,16 @@ def get_actuator_output(yaml_config, output_functions, timer_config_file, verbos
                 if show_if: param['show-if'] = show_if
                 per_channel_params.append(param)
 
+
+        if add_reverse_range_param:
+            param = {
+                    'label': 'Rev Range\n(for Servos)',
+                    'name': param_prefix+'_REV',
+                    'index-offset': -1,
+                    'show-as': 'bitset',
+                }
+            per_channel_params.append(param)
+
         # TODO: support non-standard per-channel parameters
 
         subgroup['per-channel-parameters'] = per_channel_params

Tools/module_config/generate_params.py

@@ -178,6 +178,9 @@ def get_actuator_output_params(yaml_config, output_functions,
     all_params = {}
     group_idx = 0
 
+    add_reverse_range_param = yaml_config['actuator_output'].get('add_reverse_range_param', False)
+    all_param_prefixes = {}
+
     def add_local_param(param_name, param_def):
         nonlocal all_params
         # add as a list, as there can be multiple entries with the same param_name
@@ -259,6 +262,11 @@ def get_actuator_output_params(yaml_config, output_functions,
                     for i in range(count):
                         output_function_values[start+i] = function_name_label+' '+str(i+1)
 
+        if param_prefix not in all_param_prefixes:
+            all_param_prefixes[param_prefix] = []
+        all_param_prefixes[param_prefix].append((instance_start,
+            instance_start_label, num_channels, channel_label))
+
         # function param
         param = {
             'description': {
@@ -338,6 +346,30 @@ When set to -1 (default), the value depends on the function (see {:}).
                     }
                 add_local_param(param_prefix+'_'+param_suffix+'${i}', param)
 
+    if add_reverse_range_param:
+        for param_prefix in all_param_prefixes:
+            groups = all_param_prefixes[param_prefix]
+            # collect the bits
+            channel_bits = {}
+            for instance_start, instance_start_label, num_instances, label in groups:
+                for instance in range(instance_start, instance_start+num_instances):
+                    instance_label = instance - instance_start + instance_start_label
+                    channel_bits[instance-1] = label + ' ' + str(instance_label)
+
+            param = {
+                'description': {
+                    'short': 'Reverse Output Range for '+module_name,
+                    'long':
+'''Allows to reverse the output range for each channel.
+Note: this is only useful for servos.
+'''.format(channel_label),
+                    },
+                'type': 'bitmask',
+                'default': 0,
+                'bit': channel_bits
+                }
+            add_local_param(param_prefix+'_REV', param)
+
     if verbose: print('adding actuator params: {:}'.format(all_params))
     return all_params