From 69663b28552da887dc196a100025e153821dbd57 Mon Sep 17 00:00:00 2001
From: Gergő J. Miklós
Date: Mon, 13 May 2019 01:27:38 +0200
Subject: LM75 rw

---
 src/lm75.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++-----------
 src/lm75.h | 10 +++++-----
 2 files changed, 52 insertions(+), 16 deletions(-)

diff --git a/src/lm75.c b/src/lm75.c
index bd1f764..9207860 100644
--- a/src/lm75.c
+++ b/src/lm75.c
@@ -29,14 +29,14 @@ void lm75_print_all(void)
 } 
 
  
-uchar *read_data( uchar *buf ){                     //# [buf] = 32 byte         
+uchar   *xchg_data  (uchar *buf, uint8 wrlen, uint8 waitlen, uint8 rdlen){                     //# [buf] = 32 byte         
 
-	if(write(devicef, buf, 1) != 1){                //# write one byte to device
+	if(write(devicef, buf, wrlen) != wrlen){                //# write one byte to device
         bus_err(errno);
     }
-    usleep(10*1000);                                //# Wait 10ms for reading
-
-    if(read(devicef, buf, 2) != 2) {                //# read the result
+    usleep(waitlen*1000);                                //# Wait 10ms for reading
+    
+    if(read(devicef, buf, rdlen) != rdlen) {                //# read the result
         bus_err(errno);
     }
     return buf; 
@@ -49,7 +49,7 @@ float calculate_temp(float offset){             // Calculate temperature
     float temp;
 
     buf[0] = 0x00;                                  //# Measurement in the REG[0]
-    read_data(buf);                                 //# [buf] = 32 byte
+    xchg_data(buf,1,0,2);                           //# Write: 1byte addr, Read: 2byte data, Wait:0, [buf] = 32 byte
      
     rawtemp = (buf[0]*256 + buf[1]) >> 5;           // (buf[0] << 8), and (>> 5), Device with 11bit data, is also supported
 
@@ -66,7 +66,7 @@ float calculate_temp(float offset){             // Calculate temperature
 float read_tos(void){                           // Over-Temperature Shutdown register                                           
     int16 rawtemp = 0;                              //# Int16 default signed                                                  
     buf[0] = 0x02;                                  //# Tos = REG[2]                        
-    read_data(buf);                                                                                                                    
+    xchg_data(buf,1,0,2);                                                                                                                    
 
     rawtemp = buf[0]*256 + buf[1];                           
     rawtemp = (rawtemp) >> 7;                       //# 9bit data
@@ -82,7 +82,7 @@ float read_tos(void){                           // Over-Temperature Shutdown reg
 float read_thys(void){                          // Over-Temp Hysteresis Register                                           
     int16 rawtemp = 0;                              //# signed 
     buf[0] = 0x03;                                                      
-    read_data(buf);                                 //# read from REG[3]                     
+    xchg_data(buf,1,0,2);                                 //# read from REG[3]                     
                                                            
     rawtemp = buf[0]*256 + buf[1];                           
     rawtemp = (rawtemp) >> 7;                       //# 9bit data 
@@ -95,7 +95,7 @@ float read_thys(void){                          // Over-Temp Hysteresis Register
 
 uchar read_conf(void){                          //Configuration register
     buf[0] = 0x01;                                                                                                                  
-    read_data(buf);
+    xchg_data(buf,1,0,2);
     return buf[0];                                                                                                                                   
 }
 
@@ -156,6 +156,42 @@ void lm75_read_one(const uchar *opts){                  // Prints the selected r
 }
 
 
-void lm75_conf_set(const uchar *opts){
-    // printf("");
+
+void lm75_conf_set(const uchar *opts){                  // Prints the selected register's data
+    uint16 id,i,j;
+    uchar temp[256];
+
+    if(opts != NULL){
+        for(i = 0; i < strlen((char*)opts); i++, j++){
+            if (*(opts+i) == ','){
+                break;
+            }
+            temp[i] = *(opts+i);
+            temp[i+1] = '\0';
+        }
+
+        id = atoi((char*)temp);
+        strncpy((char*)temp, (char*)opts+i+1, 255);
+        // id = strtol (opts,&ptr,0); //all format allowed
+        // ptr++;      //one separator allowed
+
+        switch (id)
+        {
+            case 0x00:
+                printf("%f\n", calculate_temp(atof((char*)temp)));
+                break;
+            case 0x01:
+                printf("0x%x\n", read_conf());
+                break;
+            case 0x02:
+                printf("%f\n", read_tos());
+                break;
+            case 0x03:
+                printf("%f\n", read_thys()); 
+                break;
+            default:
+                print_help();
+        } 
+        
+    }
 }
\ No newline at end of file
diff --git a/src/lm75.h b/src/lm75.h
index 600934c..0c8b6a8 100644
--- a/src/lm75.h
+++ b/src/lm75.h
@@ -14,11 +14,11 @@ void lm75_read_all(const uchar *opts);
 void lm75_read_one(const uchar *opts);
 void lm75_conf_set(const uchar *opts);
 
-//unsigned char *read_data(unsigned char *buf);
-float calculate_temp(float offset);
-float read_tos(void);          
-float read_thys(void);        
-uchar read_conf(void);                                                                                                         
+//unsigned char *xchg_data(unsigned char *buf);
+// float calculate_temp(float offset);
+// float read_tos(void);          
+// float read_thys(void);        
+// uchar read_conf(void);                                                                                                         
 
 //__uint8_t
 //__uint16_t
-- 
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