Add cehck mark for serial in ST_STM32F4_DISCOVERY
@@ -64,7 +64,7 @@ The above firmware builds include support for the class libraries and features m
| Target | Gpio | Spi | I2c | Pwm | Adc | Serial | Events | SWO | Networking |
|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|
-| ST_STM32F4_DISCOVERY | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | | :heavy_check_mark: | :heavy_check_mark: | |
+| ST_STM32F4_DISCOVERY | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | |
| ST_STM32F429I_DISCOVERY | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | |
| ST_NUCLEO64_F091RC | | | | :heavy_check_mark: | | | | :heavy_check_mark: | |
| ST_NUCLEO144_F746ZG | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | |
