Diff: main.cpp

Revision:

5:d7b803aa9079

Parent:

4:c194858fe0c6

Child:

6:c3db4eff9170

--- a/main.cpp	Fri Nov 18 20:25:57 2016 +0000
+++ b/main.cpp	Fri Jan 05 22:37:07 2018 +0000
@@ -10,26 +10,158 @@
 //  - Note: if you plug / unplug devices try cycling power
 
 #include "mbed.h"
-
-I2C i2c(I2C_SDA, I2C_SCL); // sda, scl
-Ticker repeatTicker;
+#include "MAX11410.h"
 
-void repeat()
+#define CS1 D9
+#define CS2 D10
+#define MOSI_1 D11
+#define MISO_1 D12
+#define SCLK_1 D13
+#define VDD 3.3
+AnalogOut vOut1(A3);
+AnalogOut vOut2(A4);
+DigitalOut cs_pin1(CS1);
+DigitalOut cs_pin2(CS2);
+SPI spi(MOSI_1, MISO_1, SCLK_1);
+MAX11410 adc1(&spi,&cs_pin1);
+MAX11410 adc2(&spi,&cs_pin2);
+//Serial pc(USBTX, USBRX,115200);
+Serial pc(USBTX, USBRX, 9600);
+
+void starting()
 {
-    printf("I2CU! Searching for I2C devices...\n");
+    pc.printf("this program has started\r\n");
+}
+
 
-    int count = 0;
-    for (int address=0; address<256; address+=2) {
-        bool temp = i2c.write(address, NULL, 0); // 0 if successful, otherwise non-zero
-        if (!temp && (address >> 1) != 0) { // not interested in address 0
-            printf(" - I2C device found at address 0x%02X (7 bit - Arduino) or 0x%02X (8 bit - mbed)\n", address >> 1, address);
-            count++;
-        }
+
+
+
+void print8bitRegsAdc1(char start_reg,char end_reg)
+{
+    bool int_status;
+    char val;
+    for(int n=start_reg;n<=end_reg;n++)
+    {
+        val = adc1.read8bits(n,&int_status);
+        pc.printf("reg %02x, val =%02x\r\n",n,val);
     }
-    printf("%d device(s) found\n", count);
+    
+}
+
+void print8bitRegsAdc2(char start_reg,char end_reg)
+{
+    bool int_status;
+    char val;
+    for(int n=start_reg;n<=end_reg;n++)
+    {
+        val = adc2.read8bits(n,&int_status);
+        pc.printf("reg %02x, val =%02x\r\n",n,val);
+    }
 }
 
-int main()
+int main() 
 {
-    repeatTicker.attach(&repeat, 2.0);
-}
\ No newline at end of file
+    int32_t channel_data[10];
+    float vdiff=0.01;
+    vOut1 = 0.5-vdiff/2;
+    vOut2 = 0.5+vdiff/2;
+    starting();
+    bool int_state;
+    spi.format(8,MAX11410_SPI_MODE); //configure number of spi bits 8, 16
+    spi.frequency(8000000); // Max 8MHz
+    //read chip ID
+    
+    pc.printf("chip ID %d\r\n",adc1.read8bits(REG_PART_ID,&int_state) );
+    
+    //config ADC 1
+    adc1.reset(); //POR
+//    adc2.reset();
+        
+    //check default register configs
+    pc.printf("default regs for ADC1\r\n");
+    print8bitRegsAdc1(REG_PD,REG_WAIT_START);
+    
+    pc.printf("default regs for ADC2\r\n");
+    print8bitRegsAdc2(REG_PD,REG_WAIT_START);
+    
+    
+    //config interrupts, PGA, Buffer, polarity, reference    
+    char mode_config = MODE_NORMAL;
+    adc1.write8bitReg(REG_PD,mode_config);      //got to normal mode
+    adc2.write8bitReg(REG_PD,mode_config);      //got to normal mode
+    
+    char filter_config = FIR_SIXTY | _RATE(4) ; //
+    adc1.write8bitReg( REG_FILTER,filter_config );
+    adc2.write8bitReg( REG_FILTER,filter_config );
+ 
+    char ctrl_config = INT_CLOCK | BIPOLAR | TWOS_COMP | _PBUF_EN(0) | _NBUF_EN(0) | REF_AVDD ; //ADC configuration
+    adc1.write8bitReg( REG_CTRL, ctrl_config );
+    adc2.write8bitReg( REG_CTRL, ctrl_config );
+    
+    char source_config = VBIAS_ACTIVE | BRN_OFF | _IDAC(0); //not sourcing current
+    adc1.write8bitReg( REG_SOURCE,source_config );
+    adc2.write8bitReg( REG_SOURCE,source_config );
+
+    uint32_t status_ie_config = DATA_RDY_INT | CAL_RDY_INT | CONV_RDY_INT;   
+    adc1.write24bitReg(REG_STATUS_IE,status_ie_config); 
+    adc2.write8bitReg( REG_SOURCE,source_config );
+    
+    char gain_setting = 0;
+    char pga_config = PGA | _GAIN_EXP(gain_setting) ; //no gain
+    adc1.write8bitReg(REG_PGA,pga_config);
+    adc2.write8bitReg(REG_PGA,pga_config);
+
+    pc.printf("PGA gain = %d\r\n",1<<gain_setting);
+    
+    //check register writes
+    pc.printf("checking register writes\r\n");
+    pc.printf("reg %02x, val %02x, set to %02x\r\n",REG_PD,adc1.read8bits(REG_PD,&int_state),mode_config);
+    pc.printf("reg %02x, val %02x, set to %02x\r\n",REG_FILTER,adc1.read8bits(REG_FILTER,&int_state),filter_config);     
+    pc.printf("reg %02x, val %02x, set to %02x\r\n",REG_CTRL,adc1.read8bits(REG_CTRL,&int_state),ctrl_config);
+    pc.printf("reg %02x, val %02x, set to %02x\r\n",REG_SOURCE,adc1.read8bits(REG_SOURCE,&int_state),source_config);
+    pc.printf("reg %02x, val %06x, set to %06x\r\n",REG_STATUS_IE,adc1.read24bits(REG_STATUS_IE,&int_state),status_ie_config);     
+    pc.printf("reg %02x, val %02x, set to %02x\r\n",REG_PGA,adc1.read8bits(REG_PGA,&int_state),pga_config);    
+    
+        // for each channel 1-5
+        for(int n=0;n<5;n++)
+        {
+            //select channel
+            char p_ch = 2*n<<4;
+            char n_ch = 2*n+1;
+            adc1.write8bitReg(REG_MUX_CTRL0, p_ch | n_ch );
+            
+            //select data output register and begin conversion
+            adc1.write8bitReg(REG_CONV_START, (_DEST(n) | SINGLE_CONV) );
+            
+            //optional: cal Gain
+            
+            //optional: cal Offset
+            
+            //optional: store cal parameters
+            
+            //begin conversion
+            
+            //wait for interrupt
+            while(!adc1.interrupt() )
+            {
+                wait_ms(CONV_DELAY_MS);//do nothing
+            }
+            
+            //read conversion
+           channel_data[n] = adc1.read24bitsSigned(REG_DATA0+n,&int_state);
+           pc.printf("%d, ",channel_data[n]);    
+        } //channel sweep
+        pc.printf("\r\n");
+
+    
+    //config ADC 2: repeat above
+    
+    
+    
+//    while(1) 
+//    {
+//       
+//    }
+
+} //END MAIN