diff --git a/libraries/AP_HAL_ChibiOS/hwdef/f303-PWM/defaults.parm b/libraries/AP_HAL_ChibiOS/hwdef/f303-PWM/defaults.parm
new file mode 100644
index 0000000000..f184a3b6d5
--- /dev/null
+++ b/libraries/AP_HAL_ChibiOS/hwdef/f303-PWM/defaults.parm
@@ -0,0 +1,8 @@
+OUT1_MIN 1000
+OUT1_MAX 2000
+OUT2_MIN 1000
+OUT2_MAX 2000
+OUT3_MIN 1000
+OUT3_MAX 2000
+OUT4_MIN 1000
+OUT4_MAX 2000
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/f303-PWM/hwdef-bl.dat b/libraries/AP_HAL_ChibiOS/hwdef/f303-PWM/hwdef-bl.dat
new file mode 100644
index 0000000000..7fed81eacc
--- /dev/null
+++ b/libraries/AP_HAL_ChibiOS/hwdef/f303-PWM/hwdef-bl.dat
@@ -0,0 +1,6 @@
+include ../f303-periph/hwdef-bl.inc
+
+# use DNA
+define HAL_CAN_DEFAULT_NODE_ID 0
+
+define CAN_APP_NODE_NAME "org.ardupilot.ap_periph_PWM"
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/f303-PWM/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/f303-PWM/hwdef.dat
new file mode 100644
index 0000000000..57bdbe3ab6
--- /dev/null
+++ b/libraries/AP_HAL_ChibiOS/hwdef/f303-PWM/hwdef.dat
@@ -0,0 +1,34 @@
+include ../f303-periph/hwdef.inc
+
+# use DNA
+define HAL_CAN_DEFAULT_NODE_ID 0
+
+define CAN_APP_NODE_NAME "org.ardupilot.ap_periph_PWM"
+
+undef PA2
+undef PA3
+undef PB14
+undef PB15
+undef USART2
+
+undef PB6
+undef PB7
+undef I2C1
+
+undef PA5
+undef PA6
+undef PA7
+undef SPI1
+
+SERIAL_ORDER USART1
+I2C_ORDER
+
+# setup for 4 PWM
+PA2 TIM2_CH3 TIM2 PWM(1) GPIO(50)
+PA3 TIM2_CH4 TIM2 PWM(2) GPIO(51)
+PB14 TIM15_CH1 TIM15 PWM(3) GPIO(52)
+PB15 TIM15_CH2 TIM15 PWM(4) GPIO(53)
+
+# enable PWM
+define HAL_PERIPH_ENABLE_RC_OUT
+