micropython
diff --git a/‎tests/extmod/machine_uart_irq_txidle.py‎
Lines changed: 9 additions & 4 deletions b/‎tests/extmod/machine_uart_irq_txidle.py‎
Lines changed: 9 additions & 4 deletions
@@ -19,6 +19,11 @@ def irq(u):
 
 text = "Hello World" * 20
 
+char_margin = 10  # number of characters to wait before and after the expected IRQ firing
+
+if "psoc-edge" in sys.platform:
+    char_margin = 100
+
 # Test that the IRQ is called after the write has completed.
 for bits_per_s in (2400, 9600, 115200):
     uart = UART(*uart_loopback_args, baudrate=bits_per_s, **uart_loopback_kwargs)
@@ -27,12 +32,12 @@ def irq(u):
     # The IRQ_TXIDLE shall trigger after the message has been sent. Thus
     # the test marks a time window close to the expected of the sending
     # and the time at which the IRQ should have been fired.
-    # It is just a rough estimation of 10 characters before and
-    # 20 characters after the data's end.
+    # It is just a rough estimation of 'char_margin' characters before and
+    # '2 x char_margin' characters after the data's end.
 
     bits_per_char = 10  # 1(startbit) + 8(bits) + 1(stopbit) + 0(parity)
-    start_time_us = (len(text) - 10) * bits_per_char * 1_000_000 // bits_per_s
-    window_ms = 20 * bits_per_char * 1_000 // bits_per_s + 1
+    start_time_us = (len(text) - char_margin) * bits_per_char * 1_000_000 // bits_per_s
+    window_ms = (2 * char_margin) * bits_per_char * 1_000 // bits_per_s + 1
 
     print("write", bits_per_s)
     uart.write(text)