From 521dad36cb4533e423fe14602165a534080b7344 Mon Sep 17 00:00:00 2001
From: Gergő J. Miklós
Date: Thu, 15 Oct 2020 23:28:26 +0200
Subject: i2sensors: SMBUS lib loading

---
 Makefile   | 10 +++++++---
 src/main.c | 11 ++++++++---
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/Makefile b/Makefile
index 255d599..82169a0 100644
--- a/Makefile
+++ b/Makefile
@@ -3,8 +3,9 @@ ACC = arm-linux-gnueabihf-gcc
 DATE = $(shell date "+%Y-%m-%d %H:%M:%S" )
 VFLAGS = -D"_BUILD_TIME_=\"$(DATE)\""
 CFLAGS = -Wall 
+#-D"WITH_I2C_SMBUS"
 
-all: dir x86 
+all: dir smbus 
 ##copy
 
 dir:
@@ -13,12 +14,15 @@ dir:
 armhf: 
 		$(ACC) $(CFLAGS) $(VFLAGS) src/hmc5883.c src/hih61xx.c src/lm75.c src/main.c -o build/i2sensors-armhf -li2c
 
-x86: 
-		$(CC) $(CFLAGS) $(VFLAGS) src/hmc5883.c src/hih61xx.c src/lm75.c src/main.c -o build/i2sensors -li2c
+tiny: 
+		$(CC) $(CFLAGS) $(VFLAGS) src/hmc5883.c src/hih61xx.c src/lm75.c src/main.c -o build/i2sensors 
 
 geode: 
 		$(CC) $(CFLAGS) $(VFLAGS) -m32 -march=geode src/hmc5883.c src/hih61xx.c src/lm75.c src/main.c -o build/i2sensors -li2c
 
+smbus:
+		$(CC) $(CFLAGS) $(VFLAGS) -D"WITH_I2C_SMBUS" src/hmc5883.c src/hih61xx.c src/lm75.c src/main.c -o build/i2sensors -li2c
+
 copy:
 	scp -r build/i2sensors-armhf root@cb2:/tmp/i2sensors
 #	rsync -aHv -q -e "ssh"  build/i2sensors-arm root@cb2:/tmp/i2sensors
diff --git a/src/main.c b/src/main.c
index 26e79ba..d9644be 100644
--- a/src/main.c
+++ b/src/main.c
@@ -12,7 +12,9 @@
 
 #include <linux/i2c-dev.h>
 #include <linux/i2c.h>
-#include <i2c/smbus.h>
+#ifdef WITH_I2C_SMBUS
+    #include <i2c/smbus.h>
+#endif
 #include <sys/ioctl.h>
   
 #include "deftypes.h"  
@@ -83,10 +85,11 @@ void print_help(void) {
 
 __uint8_t   *xchg_data  (__uint8_t *buf, __uint16_t wrlen, __uint16_t waitlen, __uint16_t rdlen){                     //# [buf] = 32 byte         
 
+#ifdef WITH_I2C_SMBUS
     __int32_t data=0;
 
-    if( funcs &  I2C_FUNC_I2C  ){
-
+    if( funcs &  I2C_FUNC_I2C ){
+#endif
         if(write(devicef, buf, 1) != 1){                //# write one byte to device
             fprintf (stderr, "I2C write error: [NO: %d, MSG: %s] at %s, line %d. (function: %s)\n", errno, strerror(errno), __FILE__, __LINE__, __func__);
         }
@@ -95,6 +98,7 @@ __uint8_t   *xchg_data  (__uint8_t *buf, __uint16_t wrlen, __uint16_t waitlen, _
             fprintf (stderr, "I2C read error: [NO: %d, MSG: %s] at %s, line %d. (function: %s)\n", errno, strerror(errno), __FILE__, __LINE__, __func__);
         }
 
+#ifdef WITH_I2C_SMBUS
     } else if ( funcs && I2C_FUNC_SMBUS_WORD_DATA ){
         if(i2c_smbus_write_byte(devicef, buf[0] ) == -1){                //# write one byte to device
             fprintf (stderr, "I2C write error: [NO: %d, MSG: %s] at %s, line %d. (function: %s)\n", errno, strerror(errno), __FILE__, __LINE__, __func__);
@@ -107,6 +111,7 @@ __uint8_t   *xchg_data  (__uint8_t *buf, __uint16_t wrlen, __uint16_t waitlen, _
             buf[1] = (data >> 8) & 0x0FF;
         }
     }
+#endif
     return buf;
 }
 
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