Update DAC8532.py

RaspberryPI/AD-DA/python/ADS1256.py

@@ -1,10 +1,6 @@
 import config
 import RPi.GPIO as GPIO
 
-
-ScanMode = 0
-
-
 # gain channel
 ADS1256_GAIN_E = {'ADS1256_GAIN_1' : 0, # GAIN   1
                   'ADS1256_GAIN_2' : 1,	# GAIN   2
@@ -129,27 +125,21 @@ def ADS1256_ConfigADC(self, gain, drate):
         config.digital_write(self.cs_pin, GPIO.HIGH)#cs 1
         config.delay_ms(1) 
 
-
+    def ADS1256_SetMode(self,Mode):
+        self.ScanMode=Mode
 
     def ADS1256_SetChannal(self, Channal):
-        if Channal > 7:
+        if Channal>7:
             return 0
-        self.ADS1256_WriteReg(REG_E['REG_MUX'], (Channal<<4) | (1<<3))
+        self.ADS1256_WriteReg(REG_E['REG_MUX'],(Channal<<4)|(1<<3))
 
     def ADS1256_SetDiffChannal(self, Channal):
-        if Channal == 0:
-            self.ADS1256_WriteReg(REG_E['REG_MUX'], (0 << 4) | 1) 	#DiffChannal  AIN0-AIN1
-        elif Channal == 1:
-            self.ADS1256_WriteReg(REG_E['REG_MUX'], (2 << 4) | 3) 	#DiffChannal   AIN2-AIN3
-        elif Channal == 2:
-            self.ADS1256_WriteReg(REG_E['REG_MUX'], (4 << 4) | 5) 	#DiffChannal    AIN4-AIN5
-        elif Channal == 3:
-            self.ADS1256_WriteReg(REG_E['REG_MUX'], (6 << 4) | 7) 	#DiffChannal   AIN6-AIN7
-
-    def ADS1256_SetMode(self, Mode):
-        ScanMode = Mode
+        if Channal>3:
+            return 0
+        self.ADS1256_WriteReg(REG_E['REG_MUX'],((2*Channal)<<4)|(2*Channal+1)) 	#DiffChannal set
 
     def ADS1256_init(self):
+        self.ADS1256_SetMode(0)
         if (config.module_init() != 0):
             return -1
         self.ADS1256_reset()
@@ -166,7 +156,6 @@ def ADS1256_Read_ADC_Data(self):
         self.ADS1256_WaitDRDY()
         config.digital_write(self.cs_pin, GPIO.LOW)#cs  0
         config.spi_writebyte([CMD['CMD_RDATA']])
-        # config.delay_ms(10)
 
         buf = config.spi_readbytes(3)
         config.digital_write(self.cs_pin, GPIO.HIGH)#cs 1
@@ -178,30 +167,30 @@ def ADS1256_Read_ADC_Data(self):
         return read
 
     def ADS1256_GetChannalValue(self, Channel):
-        if(ScanMode == 0):# 0  Single-ended input  8 channel1 Differential input  4 channe 
-            if(Channel>=8):
+        if self.ScanMode == 0:# 0  Single-ended input  8 channel 1 Differential input 4 channel 
+            if Channel>7:
                 return 0
             self.ADS1256_SetChannal(Channel)
             self.ADS1256_WriteCmd(CMD['CMD_SYNC'])
-            # config.delay_ms(10)
             self.ADS1256_WriteCmd(CMD['CMD_WAKEUP'])
-            # config.delay_ms(200)
             Value = self.ADS1256_Read_ADC_Data()
         else:
-            if(Channel>=4):
+            if(Channel>3):
                 return 0
             self.ADS1256_SetDiffChannal(Channel)
             self.ADS1256_WriteCmd(CMD['CMD_SYNC'])
-            # config.delay_ms(10) 
             self.ADS1256_WriteCmd(CMD['CMD_WAKEUP'])
-            # config.delay_ms(10) 
             Value = self.ADS1256_Read_ADC_Data()
         return Value
 
     def ADS1256_GetAll(self):
-        ADC_Value = [0,0,0,0,0,0,0,0]
-        for i in range(0,8,1):
-            ADC_Value[i] = self.ADS1256_GetChannalValue(i)
+        if self.ScanMode==0:
+            ADC_Value = [0,0,0,0,0,0,0,0]
+            for i in range(0,8,1):
+                ADC_Value[i] = self.ADS1256_GetChannalValue(i)
+        else:
+            ADC_Value=[0,0,0,0]
+            for i in range(0,4,1):
+                ADC_Value[i]=self.ADS1256_GetChannalValue(i)
         return ADC_Value
 ### END OF FILE ###
-

RaspberryPI/AD-DA/python/DAC8532.py

@@ -7,14 +7,12 @@
 
 DAC_Value_MAX = 65535
 
-DAC_VREF = 3.3
+DAC_VREF = 5.0
 
 class DAC8532:
     def __init__(self):
         self.cs_pin = config.CS_DAC_PIN
-        # config.module_init()
 
-
     def DAC8532_Write_Data(self, Channel, Data):
         config.digital_write(self.cs_pin, GPIO.LOW)#cs  0
         config.spi_writebyte([Channel, Data >> 8, Data & 0xff])
@@ -26,4 +24,3 @@ def DAC8532_Out_Voltage(self, Channel, Voltage):
             self.DAC8532_Write_Data(Channel, temp)
 
 ### END OF FILE ###
-

RaspberryPI/AD-DA/python/main.py

@@ -1,20 +1,18 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 # -*- coding:utf-8 -*-
 
-import time
 import ADS1256
 import DAC8532
 import RPi.GPIO as GPIO
 
+ADC = ADS1256.ADS1256()
+DAC = DAC8532.DAC8532()
+ADC.ADS1256_init()
 
 try:
-    ADC = ADS1256.ADS1256()
-    DAC = DAC8532.DAC8532()
-    ADC.ADS1256_init()
-
-    DAC.DAC8532_Out_Voltage(0x30, 3)
-    DAC.DAC8532_Out_Voltage(0x34, 3)
+
     while(1):
+
         ADC_Value = ADC.ADS1256_GetAll()
         print ("0 ADC = %lf"%(ADC_Value[0]*5.0/0x7fffff))
         print ("1 ADC = %lf"%(ADC_Value[1]*5.0/0x7fffff))
@@ -29,9 +27,12 @@
         print ("DAC :",temp)
         print ("\33[10A")
         DAC.DAC8532_Out_Voltage(DAC8532.channel_A, temp)
-        DAC.DAC8532_Out_Voltage(DAC8532.channel_B, 3.3 - temp)
+        DAC.DAC8532_Out_Voltage(DAC8532.channel_B, 5.0 - temp)
+
+except:
 
-except :
+    DAC.DAC8532_Out_Voltage(DAC8532.channel_A,0)
+    DAC.DAC8532_Out_Voltage(DAC8532.channel_B,0)
     GPIO.cleanup()
     print ("\r\nProgram end     ")
     exit()