AP_HAL_ChibiOS: add revo-mini-i2c alt configs

libraries/AP_HAL_ChibiOS/hwdef/revo-mini-i2c/hwdef.dat

@@ -23,7 +23,7 @@ FLASH_SIZE_KB 1024
 I2C_ORDER I2C1 I2C2
 
 # order of UARTs (and USB)
-SERIAL_ORDER OTG1 USART1 EMPTY USART6
+SERIAL_ORDER OTG1 USART1 USART3 USART6 USART2 UART4 
 
 # rcinput is PB14, which is the 1st "PWM IN" pin (the white wire on a
 # revolution board)
@@ -53,14 +53,34 @@ PB4 LED_RED OUTPUT LOW GPIO(2)
 PC6 USART6_TX USART6
 PC7 USART6_RX USART6
 
-# flexi port for USART3, alternative config
-#PB10 USART3_TX USART3
-#PB11 USART3_RX USART3
+# USART3 (SERIAL2)  on flexi port in BRD_ALT_CONFIG = 3 & 4 & 5
+PB10 USART3_TX USART3 ALT(3)
+PB11 USART3_RX USART3 ALT(3)
+PB10 USART3_TX USART3 ALT(4)
+PB11 USART3_RX USART3 ALT(4)
+PB10 USART3_TX USART3 ALT(5)
+PB11 USART3_RX USART3 ALT(5)
 
 # main port, for telem1
 PA9 USART1_TX USART1
 PA10 USART1_RX USART1
 
+# USART2 = SERIAL4 Rx & Tx on PWMOutput pins 3 & 4 in BRD_ALT_CONFIG = 1 & 2 & 4 & 5 
+PA2 USART2_TX USART2 ALT(1)
+PA3 USART2_RX USART2 ALT(1)
+PA2 USART2_TX USART2 ALT(2)
+PA3 USART2_RX USART2 ALT(2)
+PA2 USART2_TX USART2 ALT(4)
+PA3 USART2_RX USART2 ALT(4)
+PA2 USART2_TX USART2 ALT(5)
+PA3 USART2_RX USART2 ALT(5)
+
+# UART4 = SERIAL5 Rx & Tx on PWMOutput pins 5 & 6 in BRD_ALT_CONFIG = 2 & 5
+PA0 UART4_TX UART4 ALT(2)
+PA1 UART4_RX UART4 ALT(2)
+PA0 UART4_TX UART4 ALT(5)
+PA1 UART4_RX UART4 ALT(5)
+
 # flexi port, for external I2C
 PB10 I2C2_SCL I2C2
 PB11 I2C2_SDA I2C2
@@ -100,9 +120,8 @@ PA3 TIM2_CH4 TIM2 PWM(3) GPIO(52)
 PA2 TIM2_CH3 TIM2 PWM(4) GPIO(53)
 PA1 TIM2_CH2 TIM2 PWM(5) GPIO(54)
 PA0 TIM2_CH1 TIM2 PWM(6) GPIO(55)
-# disable last two channels as conflicts with TIM8 for RCIN
-#PC8 TIM8_CH3 TIM8 PWM(7) GPIO(56)
-#PC9 TIM8_CH4 TIM8 PWM(8) GPIO(57)
+PC8 TIM8_CH3 TIM8 PWM(7) GPIO(56)
+PC9 TIM8_CH4 TIM8 PWM(8) GPIO(57)
 
 PB7 DRDY_HMC5883 INPUT PULLUP
 
@@ -132,6 +151,5 @@ SPIDEV dataflash SPI3 DEVID1 FLASH_CS MODE3 32*MHZ 32*MHZ
 define HAL_LOGGING_DATAFLASH
 
 # 6 PWM available by default
-define BOARD_PWM_COUNT_DEFAULT 6
+define BOARD_PWM_COUNT_DEFAULT 8
 define HAL_WITH_DSP FALSE
-