Operating Systems End Term: 1 September 2024 (May 2024 term)

1 1  #define UART_BASE 0xB0005000
2 2  void init_uart(){
3 3      u16 *baud_reg = (u16*)UART_BASE;
4 4      *baud_reg = 0x7D;
5 5  }
6 6  u32 read_uart(){
7 7      u32 *rx_reg = (u32*)(UART_BASE + 8);
8 8      u8 *status_reg = (u8*)(UART_BASE + 12);
9 9      while((*status_reg & 0x4) == 0);
1010      return *rx_reg;
1111  }

11  void exampleFunction(int x, int y)
22  {
33      char smallBuffer[4];
44      char largeBuffer[8];
55  }
66  void main
77  {
88      exampleFunction(1, 2);
99  }