make it work!

Core/Inc/i2c_gateway.h

@@ -0,0 +1,9 @@
+#ifndef I2C_GATEWAY_H
+#define I2C_GATEWAY_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+void i2c_command(uint8_t *packet, size_t len);
+
+#endif //I2C_GATEWAY_H

Core/Inc/stm32f1xx_it.h

@@ -55,6 +55,8 @@ void DebugMon_Handler(void);
 void USB_HP_CAN1_TX_IRQHandler(void);
 void USB_LP_CAN1_RX0_IRQHandler(void);
 void TIM1_UP_IRQHandler(void);
+void I2C1_EV_IRQHandler(void);
+void I2C1_ER_IRQHandler(void);
 /* USER CODE BEGIN EFP */
 
 /* USER CODE END EFP */