diff --git a/libraries/AP_HAL_ChibiOS/hwdef/RadiolinkPIX6/Readme.md b/libraries/AP_HAL_ChibiOS/hwdef/RadiolinkPIX6/Readme.md
index 4d7142e4d218da..173b0317e7f7f7 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/RadiolinkPIX6/Readme.md
+++ b/libraries/AP_HAL_ChibiOS/hwdef/RadiolinkPIX6/Readme.md
@@ -2,7 +2,7 @@
 
 ![RadiolinkPIX6](http://www.radiolink.com.cn/firmware/wiki/RadiolinkPIX6/RadiolinkPIX6.png)
 
-Featuring STM32F7 cpu, vibration isolation of IMUs, redundant IMUs,  integrated OSD chip,  IMU heating, and Bi-Directional DShot.
+Featuring STM32F7 cpu, vibration isolation of IMUs, redundant IMUs,  integrated OSD chip,  IMU heating, and DShot.
 
 ## Specifications
 
@@ -217,11 +217,11 @@ Featuring STM32F7 cpu, vibration isolation of IMUs, redundant IMUs,  integrated
 ## UART Mapping
 
 - SERIAL0 -> USB
-- SERIAL1 -> USART2 (Telem1) RTS/CTS pins
-- SERIAL2 -> USART3 (Telem2) RTS/CTS pins
-- SERIAL3 -> USART1 (GPS1)
-- SERIAL4 -> UART4 (GPS2)
-- SERIAL5 -> UART7 (User)
+- SERIAL1 -> USART2 (Telem1) RTS/CTS pins, RX DMA capable
+- SERIAL2 -> USART3 (Telem2) RTS/CTS pins, TX/RX DMA capable
+- SERIAL3 -> USART1 (GPS1), TX/RX DMA capable
+- SERIAL4 -> UART4 (GPS2), No DMA
+- SERIAL5 -> UART7 (User), No DMA
 
 ## RC Input
 
@@ -284,7 +284,7 @@ The RadiolinkPIX6 has a built-in compass. Due to potential interference, the aut
 
 ## Analog inputs
 
-The Pixhawk6X has 3 analog inputs, one 6V tolerant and two 3.3V tolerant
+The RadiolinkPIX6 has 3 analog inputs, one 6V tolerant and two 3.3V tolerant
 
  - ADC Pin12 -> ADC 6.6V Sense
  - ADC Pin4   -> ADC IN1 3.3V Sense
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/RadiolinkPIX6/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/RadiolinkPIX6/hwdef.dat
index 0d419e77c6c520..abd4155c1773aa 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/RadiolinkPIX6/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/RadiolinkPIX6/hwdef.dat
@@ -95,8 +95,8 @@ PD3 USART2_CTS USART2
 PD4 USART2_RTS USART2
 
 # USART1 is GPS1
-PB7 USART1_RX USART1 NODMA
-PB6 USART1_TX USART1 NODMA
+PB7 USART1_RX USART1
+PB6 USART1_TX USART1
 
 # USART3 is telem2
 PD9 USART3_RX USART3
@@ -224,7 +224,7 @@ define HAL_HAVE_SAFETY_SWITCH 1
 
 define HAL_COMPASS_AUTO_ROT_DEFAULT 2
 
-DMA_PRIORITY SDMMC* UART8* ADC* USART3_RX USART2_RX TIM1_CH3 SPI4* SPI1_RX SPI2* TIM1_CH1 SPI1_TX TIM*
+DMA_PRIORITY SDMMC* UART8* ADC* USART3_RX TIM1_UP USART2_RX USART1_RX TIM1_CH3 SPI4* SPI1_RX SPI2* TIM1_CH1 SPI1_TX TIM*
 
 # enable FAT filesystem support (needs a microSD defined via SDMMC)
 define HAL_OS_FATFS_IO 1