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[avr] inline htob and btoh functions

This commit is contained in:
Bart Van Der Meerssche 2011-01-15 23:30:59 +01:00
parent 65db2fe1dd
commit 9c47f71514
3 changed files with 31 additions and 30 deletions
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27
mote/v2/avr/encode.c
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@ -1,27 +0,0 @@
#include <stdint.h>
// hex to binary/byte decoding
uint8_t htob(uint16_t hex)
{
uint8_t low_hex = (uint8_t) hex;
uint8_t high_hex = (uint8_t) (hex >> 8);
uint8_t byte;
byte = (high_hex > 0x40) ? (high_hex & 0x0F) + 9 : high_hex & 0x0F;
byte = byte << 4;
byte |= (low_hex > 0x40) ? (low_hex & 0x0F) + 9 : low_hex & 0x0F;
return byte;
}
// binary/byte to hex encoding
uint16_t btoh(uint8_t byte)
{
uint8_t low_nibble = (byte & 0x0F);
uint8_t high_nibble = (byte & 0xF0) >> 4;
uint16_t hex;
hex = (high_nibble > 0x09) ? high_nibble - 9 + 0x60 : high_nibble + 0x30;
hex = hex << 8;
hex |= (low_nibble > 0x09) ? low_nibble - 9 + 0x60 : low_nibble + 0x30;
return hex;
}

29
mote/v2/avr/encode.h
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@ -1,2 +1,27 @@
uint8_t htob(uint16_t hex);
uint16_t btoh(uint8_t byte);
#include <stdint.h>
// hex to binary/byte decoding
static inline uint8_t htob(uint16_t hex)
{
uint8_t low_hex = (uint8_t) hex;
uint8_t high_hex = (uint8_t) (hex >> 8);
uint8_t byte;
byte = (high_hex > 0x40) ? (high_hex & 0x0F) + 9 : high_hex & 0x0F;
byte = byte << 4;
byte |= (low_hex > 0x40) ? (low_hex & 0x0F) + 9 : low_hex & 0x0F;
return byte;
}
// binary/byte to hex encoding
static inline uint16_t btoh(uint8_t byte)
{
uint8_t low_nibble = (byte & 0x0F);
uint8_t high_nibble = (byte & 0xF0) >> 4;
uint16_t hex;
hex = (high_nibble > 0x09) ? high_nibble - 9 + 0x60 : high_nibble + 0x30;
hex = hex << 8;
hex |= (low_nibble > 0x09) ? low_nibble - 9 + 0x60 : low_nibble + 0x30;
return hex;
}

5
mote/v2/avr/makefile
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@ -71,7 +71,7 @@ TARGET = main
# List C source files here. (C dependencies are automatically generated.)
SRC = $(TARGET).c buffer.c uart.c spi.c ctrl.c encode.c
SRC = $(TARGET).c buffer.c uart.c spi.c ctrl.c
# List Assembler source files here.
@ -119,6 +119,9 @@ CDEFS = -DF_CPU=$(F_CPU)UL
DBG = 0
CDEFS += -D DBG=$(DBG)
# Warn when a function marked for inlining could not be substituted
CDEFS += -Winline
# uncomment and adapt these line if you want different UART library buffer size
CDEFS += -DUART_RX_BUFFER_SIZE=64
CDEFS += -DUART_TX_BUFFER_SIZE=64