small interface improvements, renaming of device specific modules, starting with TTGO T-Wristband support

components/interface-m5-input/CMakeLists.txt

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+idf_component_register(
+    SRCS 
+        "m5-input.c"
+    INCLUDE_DIRS "."
+    PRIV_REQUIRES 
+        interface
+        imu-m5-mpu6886
+)

components/interface-m5-input/m5-input.c

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+// Copyright 2020 Lukas Haubaum
+//
+// Licensed under the GNU Affero General Public License, Version 3;
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     https://www.gnu.org/licenses/agpl-3.0.html
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#include <stdio.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "driver/gpio.h"
+#include "esp_log.h"
+
+#include "mpu6886.h"
+
+#include "interface.h"
+
+#include "m5-input.h"
+
+static float input_states[INTERFACE_COMMANDS_SIZE];
+static float input_trigger_state[INTERFACE_COMMANDS_SIZE];
+static int input_command_mapping[INTERFACE_COMMANDS_SIZE];
+static bool flipped = false;
+
+void button_input_check(interface_command_t command)
+{
+    int button_level = gpio_get_level(input_command_mapping[command]);
+
+    if (button_level == 0)
+    {
+        input_states[command] = input_states[command] + ((float)INTERFACE_INPUT_TICKS_MS / 1000);
+        if (command == INTERFACE_COMMAND_SET && input_states[command] > INTERFACE_LONG_STATE_SECONDS)
+        {
+            input_states[command] = 0;
+            input_states[INTERFACE_COMMAND_SET_LONG] = input_states[INTERFACE_COMMAND_SET_LONG] + 1;
+            interface_execute_command(INTERFACE_COMMAND_SET_LONG);
+        }
+        else if (command == INTERFACE_COMMAND_RST && input_states[command] > INTERFACE_LONG_STATE_SECONDS)
+        {
+            input_states[command] = 0;
+            input_states[INTERFACE_COMMAND_RST_LONG] = input_states[INTERFACE_COMMAND_RST_LONG] + 1;
+            interface_execute_command(INTERFACE_COMMAND_RST_LONG);
+        }
+    }
+    else if (button_level == 1 && input_states[command] > 0)
+    {
+        input_states[command] = 0;
+        if (command == INTERFACE_COMMAND_SET && input_states[INTERFACE_COMMAND_SET_LONG] > 0)
+        {
+            input_states[INTERFACE_COMMAND_SET_LONG] = 0;
+        }
+        else if (command == INTERFACE_COMMAND_RST && input_states[INTERFACE_COMMAND_RST_LONG] > 0)
+        {
+            input_states[INTERFACE_COMMAND_RST_LONG] = 0;
+        }
+        else
+        {
+            if (!interface_is_idle() && flipped)
+            {
+                if (command == INTERFACE_COMMAND_SET)
+                {
+                    command = INTERFACE_COMMAND_RST;
+                }
+                else if (command == INTERFACE_COMMAND_RST)
+                {
+                    command = INTERFACE_COMMAND_SET;
+                }
+            }
+            interface_execute_command(command);
+        }
+    }
+}
+
+void accel_input(float axis, interface_command_t command, float tresh)
+{
+    if (axis > tresh)
+    {
+        input_states[command] = input_states[command] + ((float)INTERFACE_INPUT_TICKS_MS / 1000);
+
+        if (input_states[command] > input_trigger_state[command])
+        {
+            input_trigger_state[command] = input_trigger_state[command] - (input_trigger_state[command] / 8);
+            if (input_trigger_state[command] <= ((float)INTERFACE_INPUT_TICKS_MS / 200))
+            {
+                input_trigger_state[command] = ((float)INTERFACE_INPUT_TICKS_MS / 200);
+            }
+            input_states[command] = 0;
+            interface_execute_command_trigger(command);
+        }
+    }
+    else if (input_states[command] > 0)
+    {
+        input_states[command] = 0;
+        input_trigger_state[command] = INTERFACE_LONG_STATE_SECONDS;
+        interface_execute_command(command);
+    }
+}
+
+void m5_input_task(void *pvParameter)
+{
+    float ax = 0;
+    float ay = 0;
+    float az = 0;
+
+    while (1)
+    {
+        button_input_check(INTERFACE_COMMAND_SET);
+
+        if (!interface_is_idle())
+        {
+            button_input_check(INTERFACE_COMMAND_RST);
+            mpu6886_get_accel_data(&ax, &ay, &az);
+
+            accel_input(flipped ? ax : -ax, INTERFACE_COMMAND_UP, 0.3);
+            accel_input(flipped ? ay : -ay, INTERFACE_COMMAND_LFT, 0.5);
+            accel_input(flipped ? -ax : ax, INTERFACE_COMMAND_DWN, 0.5);
+            accel_input(flipped ? -ay : ay, INTERFACE_COMMAND_RHT, 0.3);
+
+            if (ax >= 0.95)
+            {
+                flipped = false;
+                interface_flipped(flipped);
+            }
+            else if (ax <= -0.95)
+            {
+                flipped = true;
+                interface_flipped(flipped);
+            }
+        }
+
+        vTaskDelay(INTERFACE_INPUT_TICKS_MS / portTICK_PERIOD_MS);
+    }
+}
+
+void m5_input_start(void)
+{
+    gpio_config_t io_conf;
+
+    io_conf.pin_bit_mask = (1ULL << BUTTON_RST) | (1ULL << BUTTON_SET);
+    io_conf.intr_type = GPIO_INTR_DISABLE;
+    io_conf.mode = GPIO_MODE_INPUT;
+    io_conf.pull_up_en = GPIO_PULLUP_ENABLE;
+    io_conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
+    gpio_config(&io_conf);
+
+    input_command_mapping[INTERFACE_COMMAND_RST] = BUTTON_RST;
+    input_command_mapping[INTERFACE_COMMAND_SET] = BUTTON_SET;
+
+    mpu6886_start();
+
+    for (int i = 0; i < INTERFACE_COMMANDS_SIZE; i++)
+    {
+        input_trigger_state[i] = INTERFACE_LONG_STATE_SECONDS;
+    }
+
+    xTaskCreate(&m5_input_task, "m5_input_task", 4096, NULL, 5, NULL);
+}

components/interface-m5-input/m5-input.h

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+// Copyright 2020 Lukas Haubaum
+//
+// Licensed under the GNU Affero General Public License, Version 3;
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     https://www.gnu.org/licenses/agpl-3.0.html
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+/**
+ * @file
+ * 
+ * @brief execute interface commands via simple push buttons
+ *  
+ */
+#ifndef _m5_input_H_
+#define _m5_input_H_
+
+#define BUTTON_RST GPIO_NUM_37
+#define BUTTON_SET GPIO_NUM_39
+
+/**
+ * @brief     
+ * 
+ * 
+ */
+void m5_input_start(void);
+
+#endif