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/soc/include/hal/uart_hal.h

@@ -127,13 +127,14 @@ typedef struct {
 /**
  * @brief  Read data from the UART rxfifo
  *
- * @param  hal Context of the HAL layer
- * @param  buf Pointer to the buffer used to store the read data. The buffer size should be large than 128 byts
- * @param  rd_len The length has been read out from the rxfifo
+ * @param[in] hal Context of the HAL layer
+ * @param[in] buf Pointer to the buffer used to store the read data. The buffer size should be large than 128 byte
+ * @param[inout] inout_rd_len As input, the size of output buffer to read (set to 0 to read all available data).
+ *                            As output, returns the actual size written into the output buffer.
  *
  * @return None
  */
-void uart_hal_read_rxfifo(uart_hal_context_t *hal, uint8_t *buf, int *rd_len);
+void uart_hal_read_rxfifo(uart_hal_context_t *hal, uint8_t *buf, int *inout_rd_len);
 
 /**
  * @brief  Write data into the UART txfifo
@@ -448,6 +449,24 @@ uint8_t uart_hal_get_symb_len(uart_hal_context_t *hal);
  */
 uint16_t uart_hal_get_max_rx_timeout_thrd(uart_hal_context_t *hal);
 
+/**
+ * @brief  Get the timeout threshold value set for receiver.
+ *
+ * @param  hw Beginning address of the peripheral registers.
+ *
+ * @return tout_thr The timeout value. If timeout is disabled then returns 0.
+ */
+#define uart_hal_get_rx_tout_thr(hal) uart_ll_get_rx_tout_thr((hal)->dev)
+
+/**
+ * @brief  Get the length of readable data in UART rxfifo.
+ *
+ * @param  hw Beginning address of the peripheral registers.
+ *
+ * @return The readable data length in rxfifo.
+ */
+#define uart_hal_get_rxfifo_len(hal) uart_ll_get_rxfifo_len((hal)->dev)
+
 #ifdef __cplusplus
 }
 #endif