From caa06b62dfceda8411cfb53922ad74c654b4d9ba Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Fri, 15 Nov 2019 14:50:29 +1100
Subject: [PATCH] HAL_ChibiOS: setup define for number of serial ports

---
 libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py b/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
index bdf4edbc0e..c2c1cd23ea 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
+++ b/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
@@ -1034,6 +1034,10 @@ def write_UART_config(f):
 #define HAL_USE_SERIAL HAL_USE_SERIAL_USB
 #endif
 ''')
+    num_uarts = len(devlist)
+    if 'IOMCU_UART' in config:
+        num_uarts -= 1
+    f.write('#define HAL_UART_NUM_SERIAL_PORTS %u\n' % num_uarts)
 
 def write_UART_config_bootloader(f):
     '''write UART config defines'''