Merge pull request #3539 from bcostm/dev_trng_nucleo-f412zg

NUCLEO_F412ZG - Add support of TRNG peripheral

Author: sg-

targets/TARGET_STM/TARGET_STM32F4/TARGET_NUCLEO_F412ZG/objects.h

@@ -46,6 +46,10 @@ struct analogin_s {
     uint8_t channel;
 };
 
+struct trng_s {
+    RNG_HandleTypeDef handle;
+};
+
 #include "common_objects.h"
 #include "gpio_object.h"
 

targets/targets.json

@@ -856,7 +856,7 @@
         "inherits": ["Target"],
         "detect_code": ["0826"],
         "macros": ["TRANSACTION_QUEUE_SIZE_SPI=2"],
-        "device_has": ["ANALOGIN", "ERROR_RED", "I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "LOWPOWERTIMER", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH", "STDIO_MESSAGES"],
+        "device_has": ["ANALOGIN", "ERROR_RED", "I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "LOWPOWERTIMER", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH", "STDIO_MESSAGES", "TRNG"],
         "release_versions": ["2", "5"],
         "device_name": "STM32F412ZG"
     },