From eb804cc7d62795b492cef7aaf8171793d3d1e27b Mon Sep 17 00:00:00 2001
From: SeungheeOh <flywithu@gmail.com>
Date: Sun, 21 Jul 2019 07:14:08 +0900
Subject: [PATCH] first commit

---
 d72042.ino | 123 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 d72042.ino

diff --git a/d72042.ino b/d72042.ino
new file mode 100644
index 0000000..f87d901
--- /dev/null
+++ b/d72042.ino
@@ -0,0 +1,123 @@
+#include <SPI.h>
+
+#define MODE 8
+#define CONTROL 9
+#define READ 0x08
+#define RESET 7
+
+
+byte inline bitchange(byte b)
+{
+  byte z=0;
+  if(b&0x8)
+  {
+    z|=0x10;
+  }
+
+    if(b&0x4)
+  {
+    z|=0x20;
+  }
+    if(b&0x2)
+  {
+    z|=0x40;
+  }
+    if(b&0x1)
+  {
+    z|=0x80;
+  }
+  
+
+  z=b<<4;
+  
+  return z;
+}
+
+
+#define REG_WRITE_CTR bitchange(0x0)
+#define REG_WRITE_CMR bitchange(0x1)
+#define REG_WRITE_UAR1 bitchange(0x2)
+#define REG_WRITE_UAR2 bitchange(0x3)
+#define REG_WRITE_SAR1 bitchange(0x4)
+#define REG_WRITE_SAR2 bitchange(0x5)
+#define REG_WRITE_MCR bitchange(0x6)
+#define REG_WRITE_TBF bitchange(0xe)
+
+
+#define REG_READ_STR (bitchange(0x0)|READ)
+#define REG_READ_FLG (bitchange(0x1)|READ)
+#define REG_READ_RDR1 (bitchange(0x2)|READ)
+#define REG_READ_RDR2 (bitchange(0x3)|READ)
+#define REG_READ_LDR1 (bitchange(0x4)|READ)
+#define REG_READ_LDR2 (bitchange(0x5)|READ)
+#define REG_READ_DAR1 (bitchange(0x6)|READ)
+#define REG_READ_DAR2 (bitchange(0x7)|READ)
+#define REG_READ_RCR (bitchange(0x8)|READ)
+#define REG_READ_RBF (bitchange(0xe)|READ)
+
+ 
+void setup (void) {
+   Serial.begin(9600); //set baud rate to 115200 for usart
+
+   SPI.begin ();
+   SPI.setClockDivider(SPI_CLOCK_DIV128);//divide the clock by 8
+
+    pinMode(MODE,OUTPUT);
+        pinMode(CONTROL,OUTPUT);
+
+            pinMode(RESET, OUTPUT);
+        
+     digitalWrite(MODE, HIGH);
+        digitalWrite(CONTROL, HIGH);
+
+ 
+        digitalWrite(RESET, HIGH);
+digitalWrite(SS, LOW);
+
+        
+}
+ 
+void loop (void) {
+  byte addr = 0x0;
+  byte data;
+  
+  SPI.beginTransaction(SPISettings(1000, MSBFIRST, SPI_MODE0)); 
+    // set speed bit format and clock/data polarity while starting SPI transaction 
+
+
+
+digitalWrite(CONTROL, HIGH);
+ delay(5);
+ SPI.transfer(REG_WRITE_CTR); // Register Select
+
+ digitalWrite(CONTROL, LOW);
+ delay(5);
+ SPI.transfer(0x10); // read second 8 bits
+ delay(5);
+
+
+
+
+
+
+
+  
+    // write the LTC CS pin low to initiate ADC sample and data transmit 
+ digitalWrite(CONTROL, HIGH);
+ delay(5);
+ SPI.transfer(REG_READ_FLG); // Register Select
+
+ digitalWrite(CONTROL, LOW);
+ delay(5);
+ data = SPI.transfer(0x0); // read second 8 bits
+    Serial.println(data); //0x2
+
+    // wite LTC CS pin high to stop LTC from transmitting zeros. 
+  SPI.endTransaction();
+    // close SPI transaction
+ 
+  delay(250);
+    // Delay that is fast but easy to read.
+//  delayMicroseconds(83);
+    // Delay that matches 12 khz delay time.
+}