From e7a8422fa93d1511d519a5a33594b490b48633e9 Mon Sep 17 00:00:00 2001
From: mxmxmx <mxxstadler@gmail.com>
Date: Thu, 30 Aug 2018 11:34:50 +0200
Subject: [PATCH] [ADC] move dma->enable()

---
 software/C2M_X/C2M_ADC.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/software/C2M_X/C2M_ADC.cpp b/software/C2M_X/C2M_ADC.cpp
index 83a1bd4..6fc7bb8 100644
--- a/software/C2M_X/C2M_ADC.cpp
+++ b/software/C2M_X/C2M_ADC.cpp
@@ -23,11 +23,13 @@ DMAMEM static volatile uint16_t __attribute__((aligned(DMA_BUF_SIZE+0))) adcbuff
   adc_.setConversionSpeed(kAdcConversionSpeed);
   adc_.setSamplingSpeed(kAdcSamplingSpeed);
   adc_.setAveraging(kAdcScanAverages);
-  adc_.enableDMA();
   
   calibration_data_ = calibration_data;
   std::fill(raw_, raw_ + ADC_CHANNEL_LAST, 0);
   std::fill(smoothed_, smoothed_ + ADC_CHANNEL_LAST, 0);
+  std::fill(adcbuffer_0, adcbuffer_0 + DMA_BUF_SIZE, 0);
+  
+  adc_.enableDMA();
 }
 
 void ADC::DMA_ISR() {
@@ -35,8 +37,7 @@ void ADC::DMA_ISR() {
   ADC::ready_ = true;
   dma0->TCD->DADDR = &adcbuffer_0[0];
   dma0->clearInterrupt();
-  // move enable to SCAN_DMA() ?
-  dma0->enable();
+  /* reenable in SCAN_DMA(); */
 }
 
 /*
@@ -88,6 +89,7 @@ void ADC::Init_DMA() {
   if (ADC::ready_) 
   {  
     ADC::ready_ = false;
+    
     /* 
      *  starts collecting results at adcbuffer_0[1] because of weird offset (--> discard adcbuffer_0[0]). 
      *  there's 16 samples in the buffer, 1-5 / 11-15 are the pitch inputs: 
@@ -103,6 +105,8 @@ void ADC::Init_DMA() {
     update<ADC_CHANNEL_3_2>(adcbuffer_0[8]);
     update<ADC_CHANNEL_4_2>(adcbuffer_0[9]);
     update<ADC_CHANNEL_5_2>(adcbuffer_0[10]);
+    /* start over */
+    dma0->enable();
   }
 }