Add pmt idle mode.

DSTAT/src/experiment.c

@@ -48,6 +48,7 @@ static void ca_cca_callback(void);
 static void portd_int0_ca(void);
 static uint8_t _swv_singledir(uint16_t dacindex, uint16_t dacindex_stop, uint16_t dacindex_pulse_height, uint16_t dacindex_step, uint8_t direction);
 static uint8_t _dpv_singledir(uint16_t dacindex, uint16_t dacindex_stop, uint16_t dacindex_pulse_height, uint16_t dacindex_step, uint8_t direction);
+static void pmt_idle(void);
 
 //interrupt callback setup
 typedef void (*port_callback_t) (void);
@@ -101,6 +102,10 @@ void experiment_handler(char command){
             dpv_experiment(p1,p2,u1,u2,u3,u4);
             break;
             
+        case 'M': //PMT idle mode - holds voltage at 0 V with no data output
+            pmt_idle();
+            break;
+            
         #if BOARD_VER_MAJOR == 1 && BOARD_VER_MINOR >= 2
         case 'P': //potentiometry - time, OCP/poteniometry
             scanf("%u%hhu",&pct1, &o1);
@@ -787,6 +792,23 @@ void pot_experiment(uint16_t time_seconds, uint8_t exp_type){
 }
 #endif
 
+void pmt_idle(void){
+    max5443_set_voltage1(65535);
+    ioport_set_pin_level(PIN_POT_2ELECTRODE, 1);
+    delay_ms(100);
+    ioport_set_pin_level(PIN_POT_CE, 1);
+    
+    while (1){
+        if (udi_cdc_is_rx_ready()){
+            if (getchar() == 'a'){
+                printf("##ABORT\n\r");
+                // Doesn't disconnect control line to minimize time this is floating
+                return;
+            }
+        }
+    }
+}
+
 void ca_experiment(uint16_t steps, uint16_t step_dac[], uint16_t step_seconds[]){
 	/**
 	 * Performs a chronoamperometry experiment.