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Add xprintf(xitoa) from elm-chan.org

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tmk 2013-05-14 16:16:57 +09:00
parent b9f558b3d8
commit d9c06db600
10 changed files with 789 additions and 222 deletions
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22
common/util.c
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@ -77,3 +77,25 @@ uint8_t biton32(uint32_t bits)
if (bits >> 1) { bits >>= 1; n += 1;}
return n;
}
uint8_t bitrev(uint8_t bits)
{
bits = (bits & 0x0f)<<4 | (bits & 0xf0)>>4;
bits = (bits & 0b00110011)<<2 | (bits & 0b11001100)>>2;
bits = (bits & 0b01010101)<<1 | (bits & 0b10101010)>>1;
return bits;
}
uint16_t bitrev16(uint16_t bits)
{
bits = bitrev(bits & 0x00ff)<<8 | bitrev((bits & 0xff00)>>8);
return bits;
}
uint32_t bitrev32(uint32_t bits)
{
bits = (uint32_t)bitrev16(bits & 0x0000ffff)<<16 | bitrev16((bits & 0xffff0000)>>16);
return bits;
}