user: Please show me the C implementation that matches the assembly code listed below:

```asm
<init_can>:
  endbr64
  push   %rbp
  lea    D65(%rip),%rax
  push   %rbx
  sub    $0x8,%rsp
  cmp    %rax,%rdi
  je     L21
  lea    D204(%rip),%rax
  cmp    %rax,%rdi
  je     L25
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  ret
  nopl   0x0(%rax)
L21:
  lea    D140(%rip),%rdi
  mov    $0xfffc0000,%ebx
  call   <puts@plt>
  lea    D250(%rip),%rdi
  call   <puts@plt>
  mov    $0xfffc001f,%edx
  orb    $0x1,(%rbx)
  mov    $0x32,%edi
  movzbl (%rdx),%eax
  and    $0x78,%eax
  or     $0x7,%eax
  mov    %al,(%rdx)
  mov    $0xfffc0006,%eax
  movb   $0x83,(%rax)
  movb   $0x25,0x1(%rax)
  movb   $0xea,-0x2(%rax)
  movb   $0xf,-0x1(%rax)
  call   <kill_time@plt>
  lea    D224(%rip),%rdi
  call   <puts@plt>
  andb   $0xfe,(%rbx)
  add    $0x8,%rsp
  mov    $0x32,%edi
  pop    %rbx
  pop    %rbp
  jmp    1080 <kill_time@plt>
  nopl   (%rax)
L25:
  lea    D243(%rip),%rbp
  mov    %rsi,%rbx
  mov    %rbp,%rdi
  call   <puts@plt>
  lea    D181(%rip),%rdi
  call   <puts@plt>
  mov    %rbp,%rdi
  lea    D273(%rip),%rbp
  call   <puts@plt>
  lea    D250(%rip),%rdi
  call   <puts@plt>
  mov    $0xfffc0000,%eax
  lea    D52(%rip),%rdi
  movzbl (%rax),%esi
  or     $0x1,%esi
  mov    %sil,(%rax)
  movzbl %sil,%esi
  xor    %eax,%eax
  call   <printf@plt>
  mov    $0x32,%edi
  call   <kill_time@plt>
  lea    D279(%rip),%rdi
  call   <puts@plt>
  mov    $0xfffc001f,%eax
  lea    D74(%rip),%rdi
  movzbl (%rax),%esi
  or     $0xffffff87,%esi
  mov    %sil,(%rax)
  movzbl %sil,%esi
  xor    %eax,%eax
  call   <printf@plt>
  mov    $0x32,%edi
  call   <kill_time@plt>
  lea    D238(%rip),%rdi
  call   <puts@plt>
  lea    D70(%rip),%rdi
  call   <puts@plt>
  mov    $0xfffc0006,%eax
  mov    $0x83,%esi
  lea    D236(%rip),%rdi
  movb   $0x83,(%rax)
  xor    %eax,%eax
  call   <printf@plt>
  lea    D143(%rip),%rdi
  call   <puts@plt>
  lea    D1(%rip),%rdi
  call   <puts@plt>
  mov    $0xfffc0007,%eax
  mov    $0x25,%esi
  lea    D123(%rip),%rdi
  movb   $0x25,(%rax)
  xor    %eax,%eax
  call   <printf@plt>
  lea    D230(%rip),%rdi
  call   <puts@plt>
  mov    $0xfffc0010,%eax
  mov    $0xa6,%esi
  lea    D13(%rip),%rdi
  movb   $0xa6,(%rax)
  xor    %eax,%eax
  call   <printf@plt>
  mov    $0xfffc0011,%eax
  mov    $0xb0,%esi
  lea    D169(%rip),%rdi
  movb   $0xb0,(%rax)
  xor    %eax,%eax
  call   <printf@plt>
  mov    $0xfffc0012,%eax
  mov    $0x12,%esi
  lea    D48(%rip),%rdi
  movb   $0x12,(%rax)
  xor    %eax,%eax
  call   <printf@plt>
  mov    $0xfffc0013,%eax
  mov    $0x30,%esi
  lea    D82(%rip),%rdi
  movb   $0x30,(%rax)
  xor    %eax,%eax
  call   <printf@plt>
  lea    D158(%rip),%rdi
  call   <puts@plt>
  mov    $0xfffc0014,%eax
  xor    %esi,%esi
  mov    %rbp,%rdi
  movb   $0x0,(%rax)
  xor    %eax,%eax
  call   <printf@plt>
  mov    $0xfffc0015,%eax
  xor    %esi,%esi
  mov    %rbp,%rdi
  movb   $0x0,(%rax)
  xor    %eax,%eax
  call   <printf@plt>
  mov    $0xfffc0016,%eax
  xor    %esi,%esi
  mov    %rbp,%rdi
  movb   $0x0,(%rax)
  xor    %eax,%eax
  call   <printf@plt>
  mov    $0xfffc0017,%eax
  xor    %esi,%esi
  lea    D192(%rip),%rdi
  movb   $0x0,(%rax)
  xor    %eax,%eax
  call   <printf@plt>
  lea    D20(%rip),%rax
  cmp    %rax,%rbx
  je     L2
L31:
  lea    D224(%rip),%rdi
  call   <puts@plt>
  mov    $0xfffc0000,%eax
  lea    D59(%rip),%rdi
  movzbl (%rax),%esi
  and    $0xfffffffe,%esi
  mov    %sil,(%rax)
  movzbl %sil,%esi
  xor    %eax,%eax
  call   <printf@plt>
  add    $0x8,%rsp
  mov    $0x32,%edi
  pop    %rbx
  pop    %rbp
  jmp    1080 <kill_time@plt>
  nop
L2:
  xor    %eax,%eax
  call   <self_testing_mode@plt>
  jmp    L31
```

tool_calls: name: retrieve_data
arguments: data_label: D65
type_infered: string
name: retrieve_data
arguments: data_label: D204
type_infered: string
name: retrieve_data
arguments: data_label: D140
type_infered: string
name: retrieve_data
arguments: data_label: D250
type_infered: string
name: retrieve_data
arguments: data_label: D224
type_infered: string
name: retrieve_data
arguments: data_label: D243
type_infered: string
name: retrieve_data
arguments: data_label: D181
type_infered: string
name: retrieve_data
arguments: data_label: D273
type_infered: string
name: retrieve_data
arguments: data_label: D52
type_infered: string
name: retrieve_data
arguments: data_label: D279
type_infered: string
name: retrieve_data
arguments: data_label: D74
type_infered: string
name: retrieve_data
arguments: data_label: D238
type_infered: string
name: retrieve_data
arguments: data_label: D70
type_infered: string
name: retrieve_data
arguments: data_label: D236
type_infered: string
name: retrieve_data
arguments: data_label: D143
type_infered: string
name: retrieve_data
arguments: data_label: D1
type_infered: string
name: retrieve_data
arguments: data_label: D123
type_infered: string
name: retrieve_data
arguments: data_label: D230
type_infered: string
name: retrieve_data
arguments: data_label: D13
type_infered: string
name: retrieve_data
arguments: data_label: D169
type_infered: string
name: retrieve_data
arguments: data_label: D48
type_infered: string
name: retrieve_data
arguments: data_label: D82
type_infered: string
name: retrieve_data
arguments: data_label: D158
type_infered: string
name: retrieve_data
arguments: data_label: D192
type_infered: string
name: retrieve_data
arguments: data_label: D20
type_infered: string
name: retrieve_data
arguments: data_label: D59
type_infered: string

tool: D65: Basic

tool: D204: Extended

tool: D140: ********** Basic Can Mode **********

tool: D250: Switch on Reset Mode

tool: D224: Switch off reset mode

tool: D243: ************************************

tool: D181: ******** Extended Can Mode *********

tool: D273: acceptance mask register: 0x%X 


tool: D52: control_register: 0x%X 



tool: D279: Set clock divider register to extended can mode

tool: D74: clock_divider_register: 0x%X 



tool: D238: Set bus timing register 0

tool: D70: Sync Jump Width = 2  Baudrate Prescaler = 1

tool: D236: bus timing register 0: 0x%X 



tool: D143: Set bus timing register 1

tool: D1: SAM = 0 ---> Single Sampling

tool: D123: bus timing register 1: 0x%X 



tool: D230: Set acceptance code register

tool: D13: acceptance code register 0: 0x%X 


tool: D169: acceptance code register 1: 0x%X 


tool: D48: acceptance code register 2: 0x%X 


tool: D82: acceptance code register 3: 0x%X 



tool: D158: Set acceptance mask register

tool: D192: acceptance mask register: 0x%X 



tool: D20: self_test

tool: D59: 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);
  }
}
```