1 int main(void)
 2 {
 3     ...
 4     
 5     串口初始化
 6     
 7     printf("Flashwrite example\r\n");
 8     patold  = 0;
 9     pg_size = NRF_FICR->CODEPAGESIZE;
10     pg_num  = NRF_FICR->CODESIZE - 1;  // Use last page in flash
11 
12     while (true)
13     {
14         // Start address:
15         addr = (uint32_t *)(pg_size * pg_num);//计算地址并擦除一页
16         // Erase page:
17         flash_page_erase(addr);
18         i = 0;
19 
20         do
21         {
22             printf("Enter char to write to flash\r\n");
23 
24             // Read char from uart, and write it to flash:
25             do
26             {
27                 err_code = app_uart_get(&patwr);
28             }
29             while(err_code == NRF_ERROR_NOT_FOUND);//从串口获得1byte数据
30 
31             if (patold != patwr)//将1byte写入flash
32             {
33                 patold = patwr;
34                 flash_word_write(++addr, (uint32_t)patwr);
35                 i += 4;
36                 printf("'%c' was write to flash\r\n", patwr);
37             }
38             // Read pattern from flash and send it back:
39             patrd = (uint8_t) * addr;
40             printf("'%c' was read from flash\r\n", patrd);
41         }
42         while (i < pg_size);
43     }
44 }