Brian Pearson / Mbed 2 deprecated LPC1768OpacityMeterUSB

Opacity meter with USB interface

Dependencies:   USBDevice mbed

ByteOperations.cpp@0:8ce24e6c4de1, 2016-01-05 (annotated)

Committer:
BPPearson
Date:
Tue Jan 05 16:44:57 2016 +0000
Revision:
0:8ce24e6c4de1
Opacity meter with USB interface

Who changed what in which revision?

UserRevisionLine numberNew contents of line
BPPearson 0:8ce24e6c4de1 1 #include "ByteOperations.h"
BPPearson 0:8ce24e6c4de1 2 #include <stdint.h>
BPPearson 0:8ce24e6c4de1 3
BPPearson 0:8ce24e6c4de1 4
BPPearson 0:8ce24e6c4de1 5 /* low index equals low nibble */
BPPearson 0:8ce24e6c4de1 6 /* Write 32 bit var to 4 bytes */
BPPearson 0:8ce24e6c4de1 7 void write_32_to_8(int *i, uint8_t dst[], uint32_t src){
BPPearson 0:8ce24e6c4de1 8 dst[(*i)++] = (src >> 0)&0xFF ;
BPPearson 0:8ce24e6c4de1 9 dst[(*i)++] = (src >> 8)&0xFF ;
BPPearson 0:8ce24e6c4de1 10 dst[(*i)++] = (src >> 16)&0xFF;
BPPearson 0:8ce24e6c4de1 11 dst[(*i)++] = (src >> 24)&0xFF;
BPPearson 0:8ce24e6c4de1 12 }
BPPearson 0:8ce24e6c4de1 13
BPPearson 0:8ce24e6c4de1 14 /* Write 16 bit var to 2 bytes */
BPPearson 0:8ce24e6c4de1 15 void write_16_to_8(int *i, uint8_t dst[], uint16_t src){
BPPearson 0:8ce24e6c4de1 16 dst[(*i)++] = (src >> 0)&0xFF ;
BPPearson 0:8ce24e6c4de1 17 dst[(*i)++] = (src >> 8)&0xFF ;
BPPearson 0:8ce24e6c4de1 18 }
BPPearson 0:8ce24e6c4de1 19
BPPearson 0:8ce24e6c4de1 20 /* Write 4 bytes to 32 bit var*/
BPPearson 0:8ce24e6c4de1 21 uint32_t read_8_to_32(int *i, uint8_t *src){
BPPearson 0:8ce24e6c4de1 22 uint32_t data = 0;
BPPearson 0:8ce24e6c4de1 23 data |= (src[(*i)++] << 0) ;
BPPearson 0:8ce24e6c4de1 24 data |= (src[(*i)++] << 8) ;
BPPearson 0:8ce24e6c4de1 25 data |= (src[(*i)++] << 16);
BPPearson 0:8ce24e6c4de1 26 data |= (src[(*i)++] << 24);
BPPearson 0:8ce24e6c4de1 27 return data;
BPPearson 0:8ce24e6c4de1 28 }
BPPearson 0:8ce24e6c4de1 29
BPPearson 0:8ce24e6c4de1 30 /* Write 2 bytes to 16 bit var*/
BPPearson 0:8ce24e6c4de1 31 uint16_t read_8_to_16(int *i, uint8_t *src){
BPPearson 0:8ce24e6c4de1 32 uint16_t data = 0;
BPPearson 0:8ce24e6c4de1 33 data |= (src[(*i)++] << 0) ;
BPPearson 0:8ce24e6c4de1 34 data |= (src[(*i)++] << 8) ;
BPPearson 0:8ce24e6c4de1 35 return data;
BPPearson 0:8ce24e6c4de1 36 }
BPPearson 0:8ce24e6c4de1 37