HAL_ChibiOS: support bootloaders with no uarts

libraries/AP_HAL_ChibiOS/hwdef/cube-orange/hwdef-bl.dat

@@ -31,7 +31,15 @@ USB_STRING_PRODUCT "ProfiCNC CUBE Orange BL"
 USB_STRING_SERIAL  "%SERIAL%"
 
 # order of UARTs (and USB)
-UART_ORDER OTG1
+UART_ORDER OTG1 USART2 UART7
+
+PD5 USART2_TX USART2
+PD6 USART2_RX USART2
+PD3 USART2_CTS USART2
+PD4 USART2_RTS USART2
+
+PE7 UART7_RX UART7
+PE8 UART7_TX UART7
 
 # now we define the pins that USB is connected on
 PA11 OTG_FS_DM OTG1

libraries/AP_HAL_ChibiOS/hwdef/fmuv5/hwdef-bl.dat

@@ -34,7 +34,16 @@ define HAL_LED_ON 0
 STM32_VDD 330U
 
 # order of UARTs (and USB)
-UART_ORDER OTG1
+UART_ORDER OTG1 USART2 UART7
+
+# USART2 is telem1
+PD6 USART2_RX USART2
+PD5 USART2_TX USART2
+PD3 USART2_CTS USART2
+PD4 USART2_RTS USART2
+
+PF6 UART7_RX UART7 NODMA
+PE8 UART7_TX UART7 NODMA
 
 PA11 OTG_FS_DM OTG1
 PA12 OTG_FS_DP OTG1

libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py

@@ -446,7 +446,6 @@ def write_mcu_config(f):
 #define HAL_NO_PRINTF
 #define HAL_NO_CCM
 #define CH_DBG_STATISTICS FALSE
-#define SERIAL_ADVANCED_BUFFERING_SUPPORT FALSE
 #define CH_CFG_USE_TM FALSE
 #define CH_CFG_USE_REGISTRY FALSE
 #define CH_CFG_USE_WAITEXIT FALSE
@@ -655,13 +654,17 @@ def write_UART_config_bootloader(f):
     uart_list = config['UART_ORDER']
     f.write('\n// UART configuration\n')
     devlist = []
+    have_uart = False
     for u in uart_list:
         if u.startswith('OTG'):
             devlist.append('(BaseChannel *)&SDU1')
         else:
             unum = int(u[-1])
             devlist.append('(BaseChannel *)&SD%u' % unum)
+            have_uart = True
     f.write('#define BOOTLOADER_DEV_LIST %s\n' % ','.join(devlist))
+    if not have_uart:
+        f.write('#define HAL_USE_SERIAL FALSE\n')
 
 def write_I2C_config(f):
     '''write I2C config defines'''