fix(uart): peripheral manager CI test adjusting

Updated UART test configurations to handle I2C interactions correctly by detaching TX pin and restarting the UART driver when both RX and TX are detached.

Author: SuGlider

tests/validation/uart/uart.ino

@@ -450,7 +450,9 @@ void periman_test(void) {
 
   for (auto *ref : uart_test_configs) {
     UARTTestConfig &config = *ref;
-    Wire.begin(config.default_rx_pin, config.default_tx_pin);
+    // when both RX and TX are detached the UART driver is stopped, 
+    // therefore, it may change just one the UART pins for testing
+    Wire.begin(config.default_rx_pin, -1);
     config.recv_msg = "";
 
     log_d("Trying to send message using UART%d with I2C enabled", config.uart_num);
@@ -459,7 +461,30 @@ void periman_test(void) {
 
     log_d("Disabling I2C and re-enabling UART%d", config.uart_num);
 
+    // when just chenging one UART pin, the driver will continue to work
+    // and it is possible to just change back the UART pins
     config.serial.setPins(config.default_rx_pin, config.default_tx_pin);
+
+    uart_internal_loopback(config.uart_num, config.default_rx_pin);
+
+    log_d("Trying to send message using UART%d with I2C disabled", config.uart_num);
+    config.transmit_and_check_msg("while I2C is disabled");
+
+
+    // when both RX and TX are detached the UART driver is stopped,
+    // Therefore, it needs to be restarted 
+    Wire.begin(config.default_rx_pin, config.default_tx_pin);
+    config.recv_msg = "";
+
+    log_d("Trying to send message using UART%d with I2C enabled", config.uart_num);
+    config.transmit_and_check_msg("while used by I2C", false);
+    TEST_ASSERT_EQUAL_STRING("", config.recv_msg.c_str());
+
+    log_d("Disabling I2C and re-enabling UART%d", config.uart_num);
+
+    // when both RX and TX are detached the UART driver is stopped, therefore, starting the driver again is necessary
+    config.serial.begin(115200, SERIAL_8N1, config.default_rx_pin, config.default_tx_pin);
+
     uart_internal_loopback(config.uart_num, config.default_rx_pin);
 
     log_d("Trying to send message using UART%d with I2C disabled", config.uart_num);
@@ -468,7 +493,6 @@ void periman_test(void) {
 
   Serial.println("Peripheral manager test successful");
 }
-
 // This test checks if messages can be transmitted and received correctly after changing the CPU frequency
 void change_cpu_frequency_test(void) {
   uint32_t old_freq = getCpuFrequencyMhz();