HAL_ChibiOS: added alt-config for UART4 on omnibusf4pro

libraries/AP_HAL_ChibiOS/hwdef/omnibusf4pro/hwdef.dat

@@ -26,12 +26,15 @@ FLASH_RESERVE_START_KB 64
 I2C_ORDER I2C2
 
 # order of UARTs
-UART_ORDER OTG1 USART6 USART1 USART3
+UART_ORDER OTG1 USART6 USART1 USART3 UART4
 
 #adc
 PC1 BAT_CURR_SENS ADC1 SCALE(1)
 PC2 BAT_VOLT_SENS ADC1 SCALE(1)
+
+#analog rssi pin (also could be used as analog airspeed input)
 PA0 RSSI_IN ADC1
+define BOARD_RSSI_ANA_PIN 0
 
 #pwm output. 1 - 4 on main header, 5 & 6 on separated header w/o 5V supply, 7 & 8 on CH5 and CH6 pads
 PB0 TIM1_CH2N TIM1 PWM(1) GPIO(50)
@@ -52,7 +55,7 @@ PA7 SPI1_MOSI SPI1
 PB10 I2C2_SCL I2C2 PULLUP
 PB11 I2C2_SDA I2C2 PULLUP
 
-# use I2C pins as USART3 (SERIAL2) in ALT_CONFIG 1
+# use I2C pins as USART3 (SERIAL2) in BRD_ALT_CONFIG=1
 PB10 USART3_TX USART3 ALT(1)
 PB11 USART3_RX USART3 ALT(1)
 
@@ -67,6 +70,9 @@ PA9 USART1_TX USART1
 PC6 USART6_TX USART6
 PC7 USART6_RX USART6
 
+# UART4 available as an alternative config on PA0 with BRD_ALT_CONFIG=2
+PA0 UART4_TX UART4 ALT(2)
+
 PA13 JTMS-SWDIO SWD
 PA14 JTCK-SWCLK SWD
 
@@ -127,13 +133,6 @@ define HAL_BATT_CURR_PIN 11
 define HAL_BATT_VOLT_SCALE 11
 define HAL_BATT_CURR_SCALE 18.2
 
-#analog rssi pin (also could be used as analog airspeed input)
-# PA0 - ADC123_CH0
-define BOARD_RSSI_ANA_PIN 0
-
-
-
-
 define OSD_ENABLED 1
 define HAL_OSD_TYPE_DEFAULT 1