Implement some power-consumption optimizations.

device/src/bt_conn.c

@@ -7,27 +7,35 @@
 #include "device_state.h"
 #include "keyboard/oled/screens/screen_manager.h"
 #include "keyboard/oled/widgets/widget.h"
+#include "legacy/power_mode.h"
 #include "nus_client.h"
 #include "nus_server.h"
 #include "device.h"
 #include "keyboard/oled/screens/pairing_screen.h"
 #include "usb/usb.h"
 #include "keyboard/oled/widgets/widgets.h"
+#include "power_mode.h"
 
 #define PeerCount 3
 
 peer_t Peers[PeerCount] = {
     {
         .id = PeerIdLeft,
         .name = "left",
+        .isConnected = false,
+        .conn = NULL,
     },
     {
         .id = PeerIdRight,
         .name = "right",
+        .isConnected = false,
+        .conn = NULL,
     },
     {
         .id = PeerIdDongle,
         .name = "dongle",
+        .isConnected = false,
+        .conn = NULL,
     },
 };
 
@@ -87,12 +95,27 @@ static void set_data_length_extension_params(struct bt_conn *conn) {
 }
 
 static void set_latency_params(struct bt_conn *conn) {
-    static const struct bt_le_conn_param conn_params = BT_LE_CONN_PARAM_INIT(
-        6, 9, // keep it low, lowest allowed is 6 (7.5ms), lowest supported widely is 9 (11.25ms)
-        0, // keeping it higher allows power saving on peripheral when there's nothing to send (keep it under 30 though)
-        100 // connection timeout (*10ms)
+    static const struct bt_le_conn_param rightActive = BT_LE_CONN_PARAM_INIT(
+        6, 6, // keep it low, lowest allowed is 6 (7.5ms), lowest supported widely is 9 (11.25ms)
+        10, // keeping it higher allows power saving on peripheral when there's nothing to send (keep it under 30 though)
+        300 // connection timeout (*10ms)
     );
-    int err = bt_conn_le_param_update(conn, &conn_params);
+    static const struct bt_le_conn_param rightSleep = BT_LE_CONN_PARAM_INIT(
+        100, 100,
+        10, // so this means a ping every 1.25s?
+        300
+    );
+    static const struct bt_le_conn_param slave = BT_LE_CONN_PARAM_INIT(
+        6, 100,
+        10,
+        300
+    );
+    int err;
+    if (DEVICE_IS_UHK80_RIGHT) {
+        err = bt_conn_le_param_update(conn, CurrentPowerMode >= PowerMode_LightSleep ? &rightSleep : &rightActive);
+    } else {
+        err = bt_conn_le_param_update(conn, &slave);
+    }
     if (err) {
         printk("LE latencies update failed: %d", err);
     }
@@ -133,6 +156,8 @@ static void connected(struct bt_conn *conn, uint8_t err) {
             DeviceState_SetConnection(ConnectionId_BluetoothHid, ConnectionType_Bt);
         }
     } else {
+        Peers[peerId].conn = bt_conn_ref(conn);
+
         set_latency_params(conn);
 
         set_data_length_extension_params(conn);
@@ -180,13 +205,24 @@ static void disconnected(struct bt_conn *conn, uint8_t reason) {
     }
 
     if (peerId != PeerIdUnknown) {
+        bt_conn_unref(Peers[peerId].conn);
         Peers[peerId].isConnected = false;
         DeviceState_TriggerUpdate();
     } else {
         DeviceState_SetConnection(ConnectionId_BluetoothHid, ConnectionType_None);
     }
 }
 
+void Bt_UpdatePowerModes() {
+    if (DEVICE_IS_UHK80_RIGHT) {
+        for (uint8_t peerId = 0; peerId < PeerCount; peerId++) {
+            if (Peers[peerId].isConnected && Peers[peerId].conn) {
+                set_latency_params(Peers[peerId].conn);
+            }
+        }
+    }
+}
+
 bool Bt_DeviceIsConnected(device_id_t deviceId) {
     switch (deviceId) {
         case DeviceId_Uhk80_Left:

device/src/bt_conn.h

@@ -22,6 +22,7 @@
     typedef struct {
         uint8_t id;
         char name[PeerNameMaxLength + 1];
+        struct bt_conn *conn;
         bt_addr_le_t addr;
         bool isConnected;
     } peer_t;
@@ -32,6 +33,7 @@
     char *GetPeerStringByConn(const struct bt_conn *conn);
     extern void bt_init(void);
     extern void num_comp_reply(uint8_t accept);
+    void Bt_UpdatePowerModes();
 
     void Bt_SetDeviceConnected(device_id_t deviceId);
     bool Bt_DeviceIsConnected(uint8_t deviceId);

device/src/keyboard/i2c.c

@@ -8,6 +8,7 @@
 #include "legacy/slave_drivers/uhk_module_driver.h"
 #include "legacy/i2c.h"
 #include "keyboard/i2c.h"
+#include "power_mode.h"
 
 // Thread definitions
 
@@ -90,6 +91,10 @@ void i2cPoller() {
         if (masterTransferInProgress) {
             lastStatus = processMasterTransfer();
         }
+
+        if (CurrentPowerMode >= PowerMode_LightSleep) {
+            k_msleep(100);
+        }
     }
 }
 

device/src/keyboard/key_scanner.c

@@ -21,6 +21,7 @@
 #include "legacy/config_manager.h"
 #include "legacy/macros/keyid_parser.h"
 #include "attributes.h"
+#include "power_mode.h"
 
 // Thread definitions
 
@@ -149,7 +150,11 @@ static void scanKeys() {
 void keyScanner() {
     while (true) {
         scanKeys();
-        k_msleep(1);
+        if (CurrentPowerMode >= PowerMode_LightSleep) {
+            k_msleep(100);
+        } else {
+            k_msleep(1);
+        }
     }
 }
 

device/src/state_sync.c

@@ -22,6 +22,7 @@
 #include <zephyr/kernel.h>
 #include "legacy/peripherals/merge_sensor.h"
 #include "power_mode.h"
+#include "bt_conn.h"
 
 #define THREAD_STACK_SIZE 2000
 #define THREAD_PRIORITY 5
@@ -325,6 +326,10 @@ static void receiveProperty(device_id_t src, state_sync_prop_id_t propId, const
             EventVector_Set(EventVector_LedMapUpdateNeeded);
         }
         break;
+    case StateSyncPropertyId_PowerMode:
+        // for both local and remote!
+        Bt_UpdatePowerModes();
+        break;
     case StateSyncPropertyId_MergeSensor:
         break;
     default:

right/src/power_mode.c

@@ -4,11 +4,13 @@
 #include "led_manager.h"
 
 #ifdef __ZEPHYR__
+    #include "state_sync.h"
     #include "device_state.h"
     #include "usb/usb.h"
 #else
     #include "slave_drivers/is31fl3xxx_driver.h"
     #include "usb_composite_device.h"
+    #include "stubs.h"
 #endif
 
 ATTR_UNUSED static bool usbAwake = false;
@@ -43,6 +45,9 @@ void PowerMode_Update() {
 static void lightSleep() {
     CurrentPowerMode = PowerMode_LightSleep;
 
+#ifdef __ZEPHYR__
+    StateSync_UpdateProperty(StateSyncPropertyId_PowerMode, &CurrentPowerMode);
+#endif
     EventVector_Set(EventVector_LedManagerFullUpdateNeeded);
     EventVector_WakeMain();
 }
@@ -58,6 +63,9 @@ static void deepSleep() {
 static void wake() {
     CurrentPowerMode = PowerMode_Awake;
 
+#ifdef __ZEPHYR__
+    StateSync_UpdateProperty(StateSyncPropertyId_PowerMode, &CurrentPowerMode);
+#endif
     EventVector_Set(EventVector_LedManagerFullUpdateNeeded);
     EventVector_WakeMain();
 }

right/src/power_mode.h

@@ -1,5 +1,5 @@
-#ifndef __POWER_MODE_H__
-#define __POWER_MODE_H__
+#ifndef __UHK_POWER_MODE_H__
+#define __UHK_POWER_MODE_H__
 
 // Includes: