From efb47bbab6666945334a478b0fce71f24e699997 Mon Sep 17 00:00:00 2001
From: Marti Bolivar <mbolivar@leaflabs.com>
Date: Wed, 31 Aug 2011 12:35:13 -0400
Subject: test-session.cpp: Measure ADC noise sequentially.

Measure pins one at a time.
---
 examples/test-session.cpp | 36 ++++++++++++++++++++++++++++--------
 1 file changed, 28 insertions(+), 8 deletions(-)

(limited to 'examples')

diff --git a/examples/test-session.cpp b/examples/test-session.cpp
index ea75410..d81fca8 100644
--- a/examples/test-session.cpp
+++ b/examples/test-session.cpp
@@ -301,18 +301,31 @@ void cmd_print_help(void) {
 }
 
 void cmd_adc_stats(void) {
-    SerialUSB.println("Taking ADC noise stats.");
-    digitalWrite(BOARD_LED_PIN, 0);
-    for (uint32 i = 0; i < BOARD_NR_ADC_PINS; i++) {
-        delay(5);
+    SerialUSB.println("Taking ADC noise stats.  Press ESC to stop, "
+                      "'R' to repeat same pin, anything else for next pin.");
+
+    uint32 i = 0;
+    while (i < BOARD_NR_ADC_PINS) {
         measure_adc_noise(boardADCPins[i]);
+
+        uint8 c = SerialUSB.read();
+        if (c == ESC) {
+            break;
+        } else if (c != 'r' && c != 'R') {
+            SerialUSB.println("----------");
+            i++;
+        }
     }
 }
 
 void cmd_stressful_adc_stats(void) {
-    SerialUSB.println("Taking ADC noise stats under duress.");
+    SerialUSB.println("Taking ADC noise stats under duress.  Press ESC to "
+                      "stop, 'R' to repeat same pin, anything else for next "
+                      "pin.");
 
-    for (uint32 i = 0; i < BOARD_NR_ADC_PINS; i++) {
+    uint32 i = 0;
+    while (i < BOARD_NR_ADC_PINS) {
+        // use PWM to create digital noise
         for (uint32 j = 0; j < BOARD_NR_PWM_PINS; j++) {
             if (boardADCPins[i] != boardPWMPins[j]) {
                 pinMode(boardPWMPins[j], PWM);
@@ -320,16 +333,23 @@ void cmd_stressful_adc_stats(void) {
             }
         }
 
-        Serial1.print(dummy_data);
-
         measure_adc_noise(boardADCPins[i]);
 
+        // turn off the noise
         for (uint32 j = 0; j < BOARD_NR_PWM_PINS; j++) {
             if (boardADCPins[i] != boardPWMPins[j]) {
                 pinMode(boardPWMPins[j], OUTPUT);
                 digitalWrite(boardPWMPins[j], LOW);
             }
         }
+
+        uint8 c = SerialUSB.read();
+        if (c == ESC) {
+            break;
+        } else if (c != 'r' && c != 'R') {
+            SerialUSB.println("----------");
+            i++;
+        }
     }
 }
 
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