freemodbus: fix long buffer failure

check master read write functions with array of registers)
fix master serial processing code and modbus controller to work with register array
modbus_master: add reading and writing of test value array (58 registers) to check failure is gone
remove parameter temporary buffer from modbus controller to allow more than 24 byte writes
driver: fix issue with TOUT feature
driver: fix uart_rx_timeout issue
driver: fix issue with rxfifo_tout_int_raw not triggered when received fifo_len = 120 byte and all bytes read out of fifo as result of rxfifo_full_int_raw
driver: add function uart_internal_set_always_rx_timeout() to always handle tout interrupt
examples: call uart_internal_set_always_rx_timeout() to handle tout interrupt correctly
examples: update examples to use tout feature
driver: reflect changes of uart_set_always_rx_timeout() function, change uart.c
driver: change conditions to trigger workaround for tout feature in uart.c
driver: change uart_set_always_rx_timeout()
freemodbus: fix tabs, remove commented code
driver: remove uart_ll_is_rx_idle()

components/driver/include/driver/uart.h

@@ -70,6 +70,8 @@ typedef enum {
 typedef struct {
     uart_event_type_t type; /*!< UART event type */
     size_t size;            /*!< UART data size for UART_DATA event*/
+    bool timeout_flag;      /*!< UART data read timeout flag for UART_DATA event (no new data received during configured RX TOUT)*/
+                            /*!< If the event is caused by FIFO-full interrupt, then there will be no event with the timeout flag before the next byte coming.*/
 } uart_event_t;
 
 typedef intr_handle_t uart_isr_handle_t;
@@ -845,6 +847,21 @@ esp_err_t uart_wait_tx_idle_polling(uart_port_t uart_num);
   */
 esp_err_t uart_set_loop_back(uart_port_t uart_num, bool loop_back_en);
 
+/**
+  * @brief Configure behavior of UART RX timeout interrupt.
+  *
+  * When always_rx_timeout is true, timeout interrupt is triggered even if FIFO is full.
+  * This function can cause extra timeout interrupts triggered only to send the timeout event.
+  * Call this function only if you want to ensure timeout interrupt will always happen after a byte stream.
+  *
+  * @param uart_num UART number
+  * @param always_rx_timeout_en Set to false enable the default behavior of timeout interrupt,
+  *                             set it to true to always trigger timeout interrupt.
+  *
+  * * @return None
+  */
+void uart_set_always_rx_timeout(uart_port_t uart_num, bool always_rx_timeout_en);
+
 #ifdef __cplusplus
 }
 #endif