From dffa37c77d2d5ce30ec408626502541861637d9d Mon Sep 17 00:00:00 2001
From: Gergő J. Miklós
Date: Thu, 15 Oct 2020 05:03:18 +0200
Subject: i2sensors SMBUS read OK (but not too pretty)

---
 src/main.c | 40 ++++++++++++++++++++++++++++------------
 1 file changed, 28 insertions(+), 12 deletions(-)

diff --git a/src/main.c b/src/main.c
index 10ca27b..4a4b15d 100644
--- a/src/main.c
+++ b/src/main.c
@@ -44,7 +44,7 @@
     
 
 
-__int16_t devicef;    //# Bus-Device file 
+__int16_t devicef=0;    //# Bus-Device file 
 long addr=0, funcs=0;
 //__uint8_t temp[256];
 void (*print_all)(void) = NULL;
@@ -66,35 +66,51 @@ void print_help(void) {
             "   get_info    -- List I2C driver functions\n"
             "\n"
             "Usage:\n"
+            "   i2sensors get_info <bus> \n"
             "   i2sensors read_all <bus> <device-type> <address> \n"
             "   i2sensors read_one <bus> <device-type> <address> <param-id,offset_for_param>\n"
             "   i2sensors conf_set <bus> <device-type> <address> <reg-id,word-of-bits>\n"
             "\n"
             "Examples:\n"
+            "   i2sensors get_info 2 \n"
             "   i2sensors read_all 1 lm75 0x4f \n"
             "   i2sensors read_one 1 lm75 0x4f  00,-1.35\n"
             "\n" );
     printf ("Version:  v%1.2f,  build: [%s] (gcc %s) \n\n",VERSION,_BUILD_TIME_,__VERSION__);
 }
 
-/*
+/* 
 void bus_err(int ern){
     printf("I2C communication(rd) error. errno: %d\n",errno);
     //fprintf (stderr, "Internal error %d at %s, line %d. (function: %s/%s)\n", ern, __FILE__, __LINE__, __func__, __FUNCTION__);
 }
 */
 
-uchar   *xchg_data  (uchar *buf, uint16 wrlen, uint16 waitlen, uint16 rdlen){                     //# [buf] = 32 byte         
+__uint8_t   *xchg_data  (__uint8_t *buf, __uint16_t wrlen, __uint16_t waitlen, __uint16_t rdlen){                     //# [buf] = 32 byte         
 
-	if(write(devicef, buf, 1) != 1){                //# write one byte to device
-        //perror("I2C communication(wrr) error.");
-        fprintf (stderr, "I2C write error: [NO: %d, MSG: %s] at %s, line %d. (function: %s)\n", errno, strerror(errno), __FILE__, __LINE__, __func__);
-    }
-    usleep(waitlen*1000);                                //# Wait 10ms for reading
+    __int32_t data=0;
+
+    if( funcs &  I2C_FUNC_I2C  ){
 
-    if(read(devicef, buf, rdlen) != rdlen) {                //# read the result
-        //perror("I2C communication(rd) error.");
-        fprintf (stderr, "I2C read error: [NO: %d, MSG: %s] at %s, line %d. (function: %s)\n", errno, strerror(errno), __FILE__, __LINE__, __func__);
+        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__);
+        }
+        usleep(waitlen*1000);                                //# Wait 10ms for reading
+        if(read(devicef, buf, rdlen) != rdlen) {                //# read the result
+            fprintf (stderr, "I2C read error: [NO: %d, MSG: %s] at %s, line %d. (function: %s)\n", errno, strerror(errno), __FILE__, __LINE__, __func__);
+        }
+
+    } 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__);
+        }
+        usleep(waitlen*1000);                                //# Wait 10ms for reading
+        if((data = i2c_smbus_read_word_data(devicef, buf[0])) == -1) {                //# read the result
+            fprintf (stderr, "I2C read error: [NO: %d, MSG: %s] at %s, line %d. (function: %s)\n", errno, strerror(errno), __FILE__, __LINE__, __func__);
+        } else {
+            buf[0] = data & 0x0FF;
+            buf[1] = (data >> 8) & 0x0FF;
+        }
     }
     return buf;
 }
@@ -154,7 +170,7 @@ int main( int argc, char *argv[] ){
         }
 
 
-        if( argc > 5 ){                        //If not get_info was called
+        if( argc > 4 ){                        //If not get_info was called
             if(argv[4][0]=='0' && argv[4][1]=='x'){                         //# Hexadecimal representetion of device address
 
                 addr = (int)strtol(argv[4], NULL, 0);                  //# strtol() is working with hex-string correctly
-- 
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