[vishnu] unknown

2 files changed, 159 insertions, 0 deletions

diff --git a/firmware/bcm2835/asd1018.cpp b/firmware/bcm2835/asd1018.cpp
new file mode 100755
index 0000000..d5bff51
--- /dev/null
+++ b/firmware/bcm2835/asd1018.cpp
@@ -0,0 +1,73 @@
+//ADS1018 Configuration 
+//http://www.ti.com/lit/ds/symlink/ads1018.pdf
+//Page 19-20
+
+// |(1=Start Single-shot), (0=no effect)
+// |
+// | |Mux  (000 = P is AIN0 N is AIN1, 001 = P is AIN0 N is AIN3, 010 = P is AIN1 N is AIN3 , 011 = P is AIN2 N is AIN3
+// | |     100 = P is AIN0 N is GND, 101 = P is AIN1 N is GND, 110 = P is AIN2 N is GND, 111 = P is AIN3 N is GND)
+// | |    
+// | |   |PGA Gain (000 = ±6.144V, 001 = ±4.096V, 010 = ±2.048V, 011 = ±1.024V, 100 = ±0.512V, 101,110,111 = ±0.256V)
+// | |   |
+// | |   |   |Mode (0 = Continuous conversion mode, 1 = Power-down and single-shot mode (default))
+// | |   |   |
+// | |   |   | |Data Rate (000 = 128SPS, 001 = 250SPS, 010 = 490SPS, 011 = 920SPS, 100 = 1600SPS, 101 = 2400SPS, 110 = 33005SPS, 111 = not used))
+// | |   |   | |   
+// | |   |   | |   |Sensor Mode (1=Internal Temp Mode, 0=ADC Mode)
+// | |   |   | |   | 
+// | |   |   | |   | |PullUp (0 = Pullup resistor disabled on DOUT/DRDY pin, 1 = Pullup resistor enabled on DOUT/DRDY pin (default))
+// | |   |   | |   | |   
+// | |   |   | |   | | |Update Config (01 = Valid data, update the Config register (default), 00,11,10 = do not update config register)
+// | |   |   | |   | | |  
+// | |   |   | |   | | |  |You must Always Write a 1 to this bit
+// | |   |   | |   | | |  |
+// 1 000 010 1 110 1 1 01 1  = 1000010111011011 = 0x85DB (this sets up a single shot for the internal temperature sensor 3300SPS)
+// 1 100 101 1 110 0 1 01 1  = 1100101111001011 = 0xCBCB (this sets up a single shot for single ended AIN0, PGA 0.256V, 860SPS)
+// 1 000 101 1 110 0 1 01 1  = 1000101111001011 = 0x8BCB (this sets up a single shot for differnetial AIN0 AIN1, PGA 0.256V, 860SPS)
+
+#include <bcm2835.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int main(){
+        if (!bcm2835_init())
+                return 1;
+        
+        bcm2835_spi_begin();   
+	bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST);
+	bcm2835_spi_setDataMode(BCM2835_SPI_MODE1);
+	bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_256);
+	bcm2835_spi_chipSelect(BCM2835_SPI_CS1);
+	bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS0, LOW);
+
+        char txMSB[1], txLSB[1], rxMSB[1], rxLSB[1], configMSB[1], configLSB[1] ;
+
+        txMSB[0]     = 0x85;
+        txLSB[0]     = 0xDB;
+        rxMSB[0]     = 0x00;
+        rxLSB[0]     = 0x00;
+        configMSB[0] = 0x00;
+        configLSB[0] = 0x00;
+
+        printf("Intitial values \nmsb = %2.2X \nlsb = %2.2X\n", txMSB[0], txLSB[0]);
+
+        // int counter = 0;
+
+        // for (int i =0 ; i <100 ; i++){
+        while(1){
+                bcm2835_spi_transfernb(txMSB, rxMSB, 1);
+                usleep(350);
+                bcm2835_spi_transfernb(txLSB, rxLSB, 1);
+                usleep(350);
+                bcm2835_spi_transfernb(txMSB, configMSB, 1);
+                usleep(350);
+                bcm2835_spi_transfernb(txLSB, configLSB, 1);
+                printf("\nData \nmsb = %2.2X \nlsb = %2.2X \nconfig \nmsb = %2.2X \nlsb = %2.2X\n", rxMSB[0], rxLSB[0], configMSB[0], configLSB[0]);
+
+        }
+
+        printf("\nData \nmsb = %2.2X \nlsb = %2.2X \nconfig \nmsb = %2.2X \nlsb = %2.2X\n", rxMSB[0], rxLSB[0], configMSB[0], configLSB[0]);
+        bcm2835_spi_end();
+	bcm2835_close();
+	return 0;
+}
\ No newline at end of file
diff --git a/firmware/bcm2835/dinkan.cpp b/firmware/bcm2835/dinkan.cpp
new file mode 100755
index 0000000..eff9774
--- /dev/null
+++ b/firmware/bcm2835/dinkan.cpp
@@ -0,0 +1,86 @@
+//ADS1018 Configuration 
+//http://www.ti.com/lit/ds/symlink/ads1018.pdf
+//Page 19-20
+
+// |(1=Start Single-shot), (0=no effect)
+// |
+// | |Mux  (000 = P is AIN0 N is AIN1, 001 = P is AIN0 N is AIN3, 010 = P is AIN1 N is AIN3 , 011 = P is AIN2 N is AIN3
+// | |     100 = P is AIN0 N is GND, 101 = P is AIN1 N is GND, 110 = P is AIN2 N is GND, 111 = P is AIN3 N is GND)
+// | |    
+// | |   |PGA Gain (000 = ±6.144V, 001 = ±4.096V, 010 = ±2.048V, 011 = ±1.024V, 100 = ±0.512V, 101,110,111 = ±0.256V)
+// | |   |
+// | |   |   |Mode (0 = Continuous conversion mode, 1 = Power-down and single-shot mode (default))
+// | |   |   |
+// | |   |   | |Data Rate (000 = 128SPS, 001 = 250SPS, 010 = 490SPS, 011 = 920SPS, 100 = 1600SPS, 101 = 2400SPS, 110 = 33005SPS, 111 = not used))
+// | |   |   | |   
+// | |   |   | |   |Sensor Mode (1=Internal Temp Mode, 0=ADC Mode)
+// | |   |   | |   | 
+// | |   |   | |   | |PullUp (0 = Pullup resistor disabled on DOUT/DRDY pin, 1 = Pullup resistor enabled on DOUT/DRDY pin (default))
+// | |   |   | |   | |   
+// | |   |   | |   | | |Update Config (01 = Valid data, update the Config register (default), 00,11,10 = do not update config register)
+// | |   |   | |   | | |  
+// | |   |   | |   | | |  |You must Always Write a 1 to this bit
+// | |   |   | |   | | |  |
+// 1 000 010 1 110 1 1 01 1  = 1000010111011011 = 0x85DB (this sets up a single shot for the internal temperature sensor 3300SPS)
+// 1 100 101 1 110 0 1 01 1  = 1100101111001011 = 0xCBCB (this sets up a single shot for single ended AIN0, PGA 0.256V, 3300SPS)
+// 1 000 101 1 110 0 1 01 1  = 1000101111001011 = 0x8BCB (this sets up a single shot for differnetial AIN0 AIN1, PGA 0.256V, 3300SPS)
+
+#include <bcm2835.h>
+#include <stdio.h>
+#include <signal.h>
+#include <unistd.h>
+
+volatile sig_atomic_t flag = 0;
+
+void sigint(int a)
+{
+	flag = 1;
+}
+int main() 
+{        
+        if(!bcm2835_init())
+                return 1;
+
+        bcm2835_spi_begin();   
+	bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST);
+	bcm2835_spi_setDataMode(BCM2835_SPI_MODE1);
+	bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_256);
+	bcm2835_spi_chipSelect(BCM2835_SPI_CS1);
+	bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS0, LOW);
+
+        uint8_t dataMSB = 0, dataLSB = 0, configMSB, configLSB ;
+        uint16_t convRegister;
+        double dinkan;
+
+        for(;;)
+        {
+                if (flag)
+                {
+                        bcm2835_spi_end();
+                        bcm2835_close();
+                        break;
+                }
+                
+                signal(SIGINT, sigint) ;                                // Ctr+C handling
+                
+                dataMSB   = bcm2835_spi_transfer(0x85);
+                dataLSB   = bcm2835_spi_transfer(0xDB);
+                usleep(350);
+                configMSB = bcm2835_spi_transfer(0x85);
+                configLSB = bcm2835_spi_transfer(0xDB);
+                
+                //Temp Calculation
+                convRegister  = (((dataMSB)<<8 | (dataLSB)) >> 4);      //Moving MSB and LSB to 12 bit and making it right-justified; 4 because 12bit value
+	        convRegister &= 0x0FFF;
+                if((convRegister) >= 0x0800)
+                {
+		        convRegister=((~convRegister)+1 & 0x0fff);      //Applying binary twos complement format
+		        dinkan = (double)(convRegister*0.125*-1);
+	        }
+	        dinkan = (double)(convRegister*0.125);
+                
+                // printf("\nRecieved \nMSB = %2.2X \nLSB = %2.2X\n", dataMSB, dataLSB);
+                printf("Temp = %2.2f C\n\n", dinkan);
+        }
+	return 0;
+}
\ No newline at end of file