user: 请从给定的汇编指令推导出C源代码：

```asm
<init_can>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  lea    D268(%rip),%rax
  cmp    %rax,-0x18(%rbp)
  jne    L7
  lea    D256(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    D279(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0xfffc0000,%eax
  movzbl (%rax),%eax
  or     $0x1,%eax
  mov    %al,-0x1(%rbp)
  mov    $0xfffc0000,%edx
  movzbl -0x1(%rbp),%eax
  mov    %al,(%rdx)
  mov    $0xfffc001f,%eax
  movzbl (%rax),%eax
  and    $0x78,%eax
  or     $0x7,%eax
  mov    %al,-0x1(%rbp)
  mov    $0xfffc001f,%edx
  movzbl -0x1(%rbp),%eax
  mov    %al,(%rdx)
  mov    $0xfffc0006,%eax
  movb   $0x83,(%rax)
  mov    $0xfffc0007,%eax
  movb   $0x25,(%rax)
  mov    $0xfffc0004,%eax
  movb   $0xea,(%rax)
  mov    $0xfffc0005,%eax
  movb   $0xf,(%rax)
  mov    $0x32,%edi
  call   <kill_time@plt>
  lea    D128(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0xfffc0000,%eax
  movzbl (%rax),%eax
  and    $0xfffffffe,%eax
  mov    %al,-0x1(%rbp)
  mov    $0xfffc0000,%edx
  movzbl -0x1(%rbp),%eax
  mov    %al,(%rdx)
  mov    $0x32,%edi
  call   <kill_time@plt>
  jmp    L34
L7:
  lea    D231(%rip),%rax
  cmp    %rax,-0x18(%rbp)
  jne    L34
  lea    D37(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    D245(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    D37(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    D279(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0xfffc0000,%eax
  movzbl (%rax),%eax
  or     $0x1,%eax
  mov    %al,-0x1(%rbp)
  mov    $0xfffc0000,%edx
  movzbl -0x1(%rbp),%eax
  mov    %al,(%rdx)
  mov    $0xfffc0000,%eax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%esi
  lea    D270(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0x32,%edi
  call   <kill_time@plt>
  lea    D233(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0xfffc001f,%eax
  movzbl (%rax),%eax
  or     $0xffffff87,%eax
  mov    %al,-0x1(%rbp)
  mov    $0xfffc001f,%edx
  movzbl -0x1(%rbp),%eax
  mov    %al,(%rdx)
  mov    $0xfffc001f,%eax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%esi
  lea    D26(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0x32,%edi
  call   <kill_time@plt>
  lea    D275(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    D98(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0xfffc0006,%eax
  movb   $0x83,(%rax)
  mov    $0xfffc0006,%eax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%esi
  lea    D195(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    D217(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    D240(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0xfffc0007,%eax
  movb   $0x25,(%rax)
  mov    $0xfffc0007,%eax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%esi
  lea    D39(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    D176(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0xfffc0010,%eax
  movb   $0xa6,(%rax)
  mov    $0xfffc0010,%eax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%esi
  lea    D0(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0xfffc0011,%eax
  movb   $0xb0,(%rax)
  mov    $0xfffc0011,%eax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%esi
  lea    D204(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0xfffc0012,%eax
  movb   $0x12,(%rax)
  mov    $0xfffc0012,%eax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%esi
  lea    D124(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0xfffc0013,%eax
  movb   $0x30,(%rax)
  mov    $0xfffc0013,%eax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%esi
  lea    D146(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    D52(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0xfffc0014,%eax
  movb   $0x0,(%rax)
  mov    $0xfffc0014,%eax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%esi
  lea    D181(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0xfffc0015,%eax
  movb   $0x0,(%rax)
  mov    $0xfffc0015,%eax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%esi
  lea    D181(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0xfffc0016,%eax
  movb   $0x0,(%rax)
  mov    $0xfffc0016,%eax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%esi
  lea    D181(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0xfffc0017,%eax
  movb   $0x0,(%rax)
  mov    $0xfffc0017,%eax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%esi
  lea    D24(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    D125(%rip),%rax
  cmp    %rax,-0x20(%rbp)
  jne    L23
  mov    $0x0,%eax
  call   <self_testing_mode@plt>
L23:
  lea    D128(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0xfffc0000,%eax
  movzbl (%rax),%eax
  and    $0xfffffffe,%eax
  mov    %al,-0x1(%rbp)
  mov    $0xfffc0000,%edx
  movzbl -0x1(%rbp),%eax
  mov    %al,(%rdx)
  mov    $0xfffc0000,%eax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%esi
  lea    D85(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0x32,%edi
  call   <kill_time@plt>
L34:
  nop
  leave
  ret
```

tool_calls: name: disassemble_data
arguments: data_tag: D268
type: string
name: disassemble_data
arguments: data_tag: D256
type: string
name: disassemble_data
arguments: data_tag: D279
type: string
name: disassemble_data
arguments: data_tag: D128
type: string
name: disassemble_data
arguments: data_tag: D231
type: string
name: disassemble_data
arguments: data_tag: D37
type: string
name: disassemble_data
arguments: data_tag: D245
type: string
name: disassemble_data
arguments: data_tag: D270
type: string
name: disassemble_data
arguments: data_tag: D233
type: string
name: disassemble_data
arguments: data_tag: D26
type: string
name: disassemble_data
arguments: data_tag: D275
type: string
name: disassemble_data
arguments: data_tag: D98
type: string
name: disassemble_data
arguments: data_tag: D195
type: string
name: disassemble_data
arguments: data_tag: D217
type: string
name: disassemble_data
arguments: data_tag: D240
type: string
name: disassemble_data
arguments: data_tag: D39
type: string
name: disassemble_data
arguments: data_tag: D176
type: string
name: disassemble_data
arguments: data_tag: D0
type: string
name: disassemble_data
arguments: data_tag: D204
type: string
name: disassemble_data
arguments: data_tag: D124
type: string
name: disassemble_data
arguments: data_tag: D146
type: string
name: disassemble_data
arguments: data_tag: D52
type: string
name: disassemble_data
arguments: data_tag: D181
type: string
name: disassemble_data
arguments: data_tag: D24
type: string
name: disassemble_data
arguments: data_tag: D125
type: string
name: disassemble_data
arguments: data_tag: D85
type: string

tool: D268: Basic

tool: D256: ********** Basic Can Mode **********

tool: D279: Switch on Reset Mode

tool: D128: Switch off reset mode

tool: D231: Extended

tool: D37: ************************************

tool: D245: ******** Extended Can Mode *********

tool: D270: control_register: 0x%X 



tool: D233: Set clock divider register to extended can mode

tool: D26: clock_divider_register: 0x%X 



tool: D275: Set bus timing register 0

tool: D98: Sync Jump Width = 2  Baudrate Prescaler = 1

tool: D195: bus timing register 0: 0x%X 



tool: D217: Set bus timing register 1

tool: D240: SAM = 0 ---> Single Sampling

tool: D39: bus timing register 1: 0x%X 



tool: D176: Set acceptance code register

tool: D0: acceptance code register 0: 0x%X 


tool: D204: acceptance code register 1: 0x%X 


tool: D124: acceptance code register 2: 0x%X 


tool: D146: acceptance code register 3: 0x%X 



tool: D52: Set acceptance mask register

tool: D181: acceptance mask register: 0x%X 


tool: D24: acceptance mask register: 0x%X 



tool: D125: self_test

tool: D85: control_register 0x%X 



assistant: ```c
void init_can(char *mode, char *self_test) {
  unsigned char r_val;
  if (mode == "Basic") {
    printf("********** Basic Can Mode **********\n");
    printf("Switch on Reset Mode\n");
    r_val = *((unsigned char *)(0xfffc0000)) | 0x01;
    *((unsigned char *)(0xfffc0000)) = r_val;
    r_val = *((unsigned char *)(0xfffc001F)) & 0x7F | 0x07;
    *((unsigned char *)(0xfffc001F)) = r_val;
    *((unsigned char *)(0xfffc0006)) = 0x83;
    *((unsigned char *)(0xfffc0007)) = 0x25;
    *((unsigned char *)(0xfffc0004)) = 0xEA;
    *((unsigned char *)(0xfffc0005)) = 0x0F;
    kill_time(50);
    printf("Switch off reset mode\n");
    r_val = *((unsigned char *)(0xfffc0000)) & 0xFE;
    *((unsigned char *)(0xfffc0000)) = r_val;
    kill_time(50);
  } else if (mode == "Extended") {
    printf("************************************\n");
    printf("******** Extended Can Mode *********\n");
    printf("************************************\n");
    printf("Switch on Reset Mode\n");
    r_val = *((unsigned char *)(0xfffc0000)) | 0x01;
    *((unsigned char *)(0xfffc0000)) = r_val;
    printf("control_register: 0x%X \n\n", *((unsigned char *)(0xfffc0000)));
    kill_time(50);
    printf("Set clock divider register to extended can mode\n");
    r_val = *((unsigned char *)(0xfffc001F)) | 0x80 | 0x07;
    *((unsigned char *)(0xfffc001F)) = r_val;
    printf("clock_divider_register: 0x%X \n\n", *((unsigned char *)(0xfffc001F)));
    kill_time(50);
    printf("Set bus timing register 0\n");
    printf("Sync Jump Width = 2  Baudrate Prescaler = 1\n");
    *((unsigned char *)(0xfffc0006)) = 0x83;
    printf("bus timing register 0: 0x%X \n\n", *((unsigned char *)(0xfffc0006)));
    printf("Set bus timing register 1\n");
    printf("SAM = 0 ---> Single Sampling\n");
    *((unsigned char *)(0xfffc0007)) = 0x25;
    printf("bus timing register 1: 0x%X \n\n", *((unsigned char *)(0xfffc0007)));
    printf("Set acceptance code register\n");
    *((unsigned char *)(0xfffc0010)) = 0xA6;
    printf("acceptance code register 0: 0x%X \n", *((unsigned char *)(0xfffc0010)));
    *((unsigned char *)(0xfffc0011)) = 0xB0;
    printf("acceptance code register 1: 0x%X \n", *((unsigned char *)(0xfffc0011)));
    *((unsigned char *)(0xfffc0012)) = 0x12;
    printf("acceptance code register 2: 0x%X \n", *((unsigned char *)(0xfffc0012)));
    *((unsigned char *)(0xfffc0013)) = 0x30;
    printf("acceptance code register 3: 0x%X \n\n", *((unsigned char *)(0xfffc0013)));
    printf("Set acceptance mask register\n");
    *((unsigned char *)(0xfffc0014)) = 0x00;
    printf("acceptance mask register: 0x%X \n", *((unsigned char *)(0xfffc0014)));
    *((unsigned char *)(0xfffc0015)) = 0x00;
    printf("acceptance mask register: 0x%X \n", *((unsigned char *)(0xfffc0015)));
    *((unsigned char *)(0xfffc0016)) = 0x00;
    printf("acceptance mask register: 0x%X \n", *((unsigned char *)(0xfffc0016)));
    *((unsigned char *)(0xfffc0017)) = 0x00;
    printf("acceptance mask register: 0x%X \n\n", *((unsigned char *)(0xfffc0017)));
    if (self_test == "self_test") {
      self_testing_mode();
    }
    printf("Switch off reset mode\n");
    r_val = *((unsigned char *)(0xfffc0000)) & 0xFE;
    *((unsigned char *)(0xfffc0000)) = r_val;
    printf("control_register 0x%X \n\n", *((unsigned char *)(0xfffc0000)));
    kill_time(50);
  }
}
```