Diff: ads1015.cpp

Revision:

0:b3c2afab9578

Child:

2:2407708483f4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ads1015.cpp	Thu Jan 26 17:00:38 2017 +0000
@@ -0,0 +1,58 @@
+#include "ads1015.h"
+
+ADS1015::ADS1015(uint8_t i2c_addr, I2C* i2c_object, uint16_t adc_gain):
+    ADS1015_ADDR(i2c_addr << 1),
+    i2c(i2c_object),
+    m_gain(adc_gain)
+{}
+
+uint16_t ADS1015::read_single_channel(int ch){
+    if(ch > 3)
+        return 0;
+        
+    uint16_t config = ADS1015_CONFIG_COMP_QUE_NONE    | // disable comparator
+                      ADS1015_CONFIG_COMP_LAT_NONE    | // nonlatching comparator
+                      ADS1015_CONFIG_COMP_POL_ACTVLOW | // Alert/Rdy active low
+                      CONFIG_COMP_MODE_TRAD           | // Traditional comparator
+                      ADS1015_CONFIG_DR_1600SPS       | // Data rate : 1600sps
+                      ADS1015_CONFIG_MODE_SINGLE      | // Single shot mode
+                      m_gain;                           // Set gain
+                      
+    switch(ch){
+        case 0 :
+            config |= ADS1015_CONFIG_MUX_SINGLE_0;
+            break;
+        case 1 :
+            config |= ADS1015_CONFIG_MUX_SINGLE_1;
+            break;
+        case 2 :
+            config |= ADS1015_CONFIG_MUX_SINGLE_2;
+            break;
+        case 3 :
+            config |= ADS1015_CONFIG_MUX_SINGLE_3;
+            break;                      
+    }
+    
+    config |= ADS1015_CONFIG_OS_START_CONV;
+    
+    write_16(ADS1015_REG_CONFIG, config);
+    wait_ms(ADS1015_CONVERSIONDELAY);
+    return read_16(ADS1015_REG_CONVERSION) >> 4;                          
+}
+
+void ADS1015::write_16(uint8_t reg, uint16_t msg){
+    char cmd[3];
+    cmd[0] = reg;
+    cmd[1] = (char)(msg>>8);
+    cmd[2] = (char)(msg & 0xff);
+
+    i2c->write(ADS1015_ADDR, cmd, 3);
+}
+
+uint16_t ADS1015::read_16(uint8_t reg){
+    char cmd[2];
+    cmd[0] = reg;
+    i2c->write(ADS1015_ADDR, cmd, 1);
+    i2c->read(ADS1015_ADDR, cmd, 2);
+    return (data[0] << 8 | data[1]);    
+}
\ No newline at end of file