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  1. #include <iostream>
  2. #include <array>
  3. #include <map>
  4. #include <bitset>
  5.  
  6. using namespace std;
  7.  
  8. array<string, 8> foreach_bit(uint8_t v, const string (&s)[8][2]) {
  9.   bitset<8> bs(v);
  10.   array<string, 8> r;
  11.   for (int i = 0; i < 8; ++i)
  12.     r[i] = s[i][bs[i]];
  13.   return r;
  14. };
  15.  
  16. typedef array<string, 8> (*ExplainRegFunc)(uint8_t);
  17.  
  18. struct RegisterInfo {
  19.   string name;
  20.   ExplainRegFunc explainFun;
  21. };
  22.  
  23. #define RESERVED_BITFIELD {"", "ERROR: reserved, 0 expected"}
  24. #define EMPTY_BITFIELD {"", ""}
  25.  
  26. static map<int, RegisterInfo> regInfo = {
  27.     {0, {
  28.             .name = "CONFIG",
  29.             .explainFun = [](uint8_t v) {
  30.               array<string, 8> r = foreach_bit(v, {
  31.                   {"TX", "RX"},                  // 0
  32.                   {"DOWN", "UP"},                // 1
  33.                   {"1 byte CRC", "2 bytes CRC"}, // 2
  34.                   {"CRC off", ""},               // 3
  35.                   {"", "MAX_RT off"},            // 4
  36.                   {"", "TX_DS off"},             // 5
  37.                   {"", "RX_DR off"},             // 6
  38.                   RESERVED_BITFIELD              // 7
  39.               });
  40.               if (r[3] != "") r[2] = "";
  41.               return r;
  42.             }
  43.         }
  44.     },
  45.     {3, {
  46.             .name = "SETUP_AW",
  47.             .explainFun = [](uint8_t v) {
  48.               array<string, 8> r = foreach_bit(v, {
  49.                   EMPTY_BITFIELD,
  50.                   EMPTY_BITFIELD,
  51.                   RESERVED_BITFIELD,
  52.                   RESERVED_BITFIELD,
  53.                   RESERVED_BITFIELD,
  54.                   RESERVED_BITFIELD,
  55.                   RESERVED_BITFIELD,
  56.                   RESERVED_BITFIELD
  57.               });
  58.               const string vars[] = { "illegal", "3 bytes", "4 bytes", "6 bytes"};
  59.               r[1] = vars[v & 0x3];
  60.               return r;
  61.             }
  62.         }
  63.     }
  64. };
  65.  
  66. static void describeData(uint8_t value, const string &name, const array<string, 8> &descr) {
  67.   cout << name << " = " << bitset<8>(value) << endl;
  68.   char hlines[8];
  69.   for (int i = 0; i < 8; i++) {
  70.     hlines[7 - i] = (descr[i] != "") ? '|' : ' ';
  71.   }
  72.   string offset(name.length() + 3, ' ');
  73.   for (int i = 0; i < 8; i++) {
  74.     if (descr[i] == "") continue;
  75.     hlines[7 - i] = 0;
  76.     cout << offset << hlines << '`' << descr[i] << endl;
  77.   }
  78. }
  79.  
  80. static void describeRegsiter(int address, uint8_t value) {
  81.   if (regInfo.count(address) == 0) {
  82.     cout << "ERROR: no info about register[" << address << "]" << endl;
  83.     return;
  84.   }
  85.   const RegisterInfo &ri = regInfo[address];
  86.   describeData(value, ri.name, ri.explainFun(value));
  87. }
  88.  
  89. int main() {
  90.   cout << "NRF24L01+ control util" << endl;
  91.   describeRegsiter(0, 0x77);
  92.   describeRegsiter(3, 0x00);
  93.   describeRegsiter(3, 0x13);
  94.   describeRegsiter(4, 0x77);
  95.   return 0;
  96. }
Success #stdin #stdout 0s 3464KB
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Standard input is empty
stdout
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NRF24L01+ control util
CONFIG = 01110111
          |||| |`RX
          |||| `UP
          |||`CRC off
          ||`MAX_RT off
          |`TX_DS off
          `RX_DR off
SETUP_AW = 00000000
                 `illegal
SETUP_AW = 00010011
              |  `6 bytes
              `ERROR: reserved, 0 expected
ERROR: no info about register[4]
https://ideone.com/XmWzsp
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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