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replaced function msb2lsb(...) by already existing function reflect8(...)

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tharexde 2020-06-17 23:38:49 +02:00
commit 601da777ad
1 changed files with 5 additions and 16 deletions
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21
armsrc/em4x50.c
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@ -12,6 +12,7 @@
#include "ticks.h"
#include "dbprint.h"
#include "lfadc.h"
#include "commonutil.h"
#include "em4x50.h"
// 4 data bytes
@ -118,28 +119,16 @@ static uint8_t bits2byte(uint8_t bits[8], int length) {
return byte;
}
static uint8_t msb2lsb(uint8_t byte) {
// returns byte with bit positions in reverse order
uint8_t tmp = 0;
for (int i = 0; i < 8; i++)
tmp |= ((byte >> (7-i)) & 1) << i;
return tmp;
}
static void msb2lsb_word(uint8_t *word) {
// reorders given <word> according to EM4x50 datasheet (msb -> lsb)
uint8_t buff[4];
buff[0] = msb2lsb(word[3]);
buff[1] = msb2lsb(word[2]);
buff[2] = msb2lsb(word[1]);
buff[3] = msb2lsb(word[0]);
buff[0] = reflect8(word[3]);
buff[1] = reflect8(word[2]);
buff[2] = reflect8(word[1]);
buff[3] = reflect8(word[0]);
word[0] = buff[0];
word[1] = buff[1];