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added 12 characters in body

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edited Apr 5, 2015 at 21:15

2.5k
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13

I prefer to use unions. example:

union fourbyte {
  uint32_t dword;
  uint16_t word[2];
  uint8_t  byte[4];
};

union fourbyte val;

val.dword = 0x3210;0x03020100;

Serial.println(val.byte[0], HEX);
Serial.println(val.byte[1], HEX);
Serial.println(val.byte[2], HEX);
Serial.println(val.byte[3], HEX);

Serial.println(val.word[0], HEX);
Serial.println(val.word[1], HEX);

Serial.println(val.dword, HEX);

I prefer to use unions. example:

union fourbyte {
  uint32_t dword;
  uint16_t word[2];
  uint8_t  byte[4];
};

union fourbyte val;

val.dword = 0x3210;

Serial.println(val.byte[0], HEX);
Serial.println(val.byte[1], HEX);
Serial.println(val.byte[2], HEX);
Serial.println(val.byte[3], HEX);

Serial.println(val.word[0], HEX);
Serial.println(val.word[1], HEX);

Serial.println(val.dword, HEX);

I prefer to use unions. example:

union fourbyte {
  uint32_t dword;
  uint16_t word[2];
  uint8_t  byte[4];
};

union fourbyte val;

val.dword = 0x03020100;

Serial.println(val.byte[0], HEX);
Serial.println(val.byte[1], HEX);
Serial.println(val.byte[2], HEX);
Serial.println(val.byte[3], HEX);

Serial.println(val.word[0], HEX);
Serial.println(val.word[1], HEX);

Serial.println(val.dword, HEX);

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answered Apr 5, 2015 at 21:10

mpflaga

2.5k
14
13

I prefer to use unions. example:

union fourbyte {
  uint32_t dword;
  uint16_t word[2];
  uint8_t  byte[4];
};

union fourbyte val;

val.dword = 0x3210;

Serial.println(val.byte[0], HEX);
Serial.println(val.byte[1], HEX);
Serial.println(val.byte[2], HEX);
Serial.println(val.byte[3], HEX);

Serial.println(val.word[0], HEX);
Serial.println(val.word[1], HEX);

Serial.println(val.dword, HEX);