feat(ds18b20-ds2480): добавь порт F407 и асинхронную подтяжку

c/ds18b20-ds2480/ds2480.h

@@ -10,7 +10,7 @@ extern "C" {
 typedef enum {
     DS2480_OK = 0, DS2480_DONE, DS2480_NO_PRESENCE, DS2480_SHORT,
     DS2480_IO, DS2480_PROTOCOL, DS2480_CRC, DS2480_ARGUMENT,
-    DS2480_NOT_READY, DS2480_DATA
+    DS2480_NOT_READY, DS2480_DATA, DS2480_BUSY
 } ds2480_status;
 
 /** Blocking UART callbacks: 0 = success, nonzero = error/timeout.
@@ -33,6 +33,7 @@ typedef struct {
     ds2480_port port;
     uint32_t timeout_ms;
     uint8_t ready;
+    uint8_t power_active;
 } ds2480;
 
 /** Independent ROM search cursor. Zero-initialize before each enumeration. */
@@ -56,6 +57,14 @@ ds2480_status ds2480_byte(ds2480 *bus, uint8_t value, uint8_t *received);
  * Blocks for hold_ms (1..1000), then terminates the pulse and consumes reply.
  */
 ds2480_status ds2480_power_byte(ds2480 *bus, uint8_t value, uint32_t hold_ms);
+/** Start indefinite strong pullup after the final bit; returns immediately
+ * after UART exchange. Until power_end, other bus operations return BUSY.
+ * Application MUST call power_end after the sensor's required hold time,
+ * or init to cancel/recover. No internal timer/interrupt releases the pulse.
+ */
+ds2480_status ds2480_power_begin(ds2480 *bus, uint8_t value);
+/** Release strong pullup, consume its reply. Idempotent when ready/idle. */
+ds2480_status ds2480_power_end(ds2480 *bus);
 /** CRC8 Dallas/Maxim. data must address size bytes (NULL allowed for size=0). */
 uint8_t ds2480_crc8(const uint8_t *data, uint32_t size);
 /** Search ALL families. OK yields ROM with valid CRC; DONE ends enumeration.