HAL_ChibiOS: use AP_PERIPH env var

libraries/AP_HAL_ChibiOS/hwdef/f103-periph/hwdef-bl.dat

@@ -9,6 +9,9 @@ FLASH_BOOTLOADER_LOAD_KB 25
 # board ID for firmware load
 APJ_BOARD_ID 3
 
+# setup build for a peripheral firmware
+env AP_PERIPH 1
+
 # crystal frequency
 OSCILLATOR_HZ 8000000
 

libraries/AP_HAL_ChibiOS/hwdef/f103-periph/hwdef.dat

@@ -13,6 +13,9 @@ define HAL_STORAGE_SIZE 800
 # board ID for firmware load
 APJ_BOARD_ID 3
 
+# setup build for a peripheral firmware
+env AP_PERIPH 1
+
 # crystal frequency
 OSCILLATOR_HZ 8000000
 

libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py

@@ -551,7 +551,7 @@ def write_mcu_config(f):
         f.write('#define HAL_USE_SERIAL_USB TRUE\n')
     if 'OTG2' in bytype:
         f.write('#define STM32_USB_USE_OTG2                  TRUE\n')
-    if have_type_prefix('CAN') and not mcu_series.startswith("STM32F1"):
+    if have_type_prefix('CAN') and not 'AP_PERIPH' in env_vars:
         enable_can(f)
 
     if get_config('PROCESS_STACK', required=False):