Helmut Schmücker / FastAnalogIn

Class similar to AnalogIn that uses burst mode to run continious background conversions so when the input is read, the last value can immediatly be returned.

Fork of FastAnalogIn by Erik -

Obsolete!

Has been already merged with Erik's original repository => take the original!

  • Added support for LPC4088.
  • Fixed linker error (missing definition of static member "channel_usage")

Files at this revision

API Documentation at this revision

Revision 5:55274430c8df, committed 2014-04-21

Comitter:
humlet
Date:
Mon Apr 21 07:17:39 2014 +0000
Parent:
4:cd84739f7640
Commit message:
* minor docu changes; * added definition of "channel_usage" also to KLXX-implementation

Changed in this revision

FastAnalogIn.h Show annotated file Show diff for this revision Revisions of this file
FastAnalogIn_KLXX.cpp Show annotated file Show diff for this revision Revisions of this file
FastAnalogIn_LPC408X.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/FastAnalogIn.h	Sun Apr 20 16:23:19 2014 +0000
+++ b/FastAnalogIn.h	Mon Apr 21 07:17:39 2014 +0000
@@ -11,14 +11,14 @@
     #error "Target not supported"
 #endif
 
- /** A class similar to AnalogIn, only faster, for LPC1768 and KLxx
+ /** A class similar to AnalogIn, only faster, for LPC1768, LPC408X and KLxx
  *
  * AnalogIn does a single conversion when you read a value (actually several conversions and it takes the median of that).
  * This library runns the ADC conversion automatically in the background.
  * When read is called, it immediatly returns the last sampled value.
  *
- * LPC1768
- * Using more ADC pins in continuous mode will decrease the conversion rate (LPC1768).
+ * LPC1768 / LPC4088
+ * Using more ADC pins in continuous mode will decrease the conversion rate (LPC1768:200kHz/LPC4088:400kHz).
  * If you need to sample one pin very fast and sometimes also need to do AD conversions on another pin,
  * you can disable the continuous conversion on that ADC channel and still read its value.
  *

--- a/FastAnalogIn_KLXX.cpp	Sun Apr 20 16:23:19 2014 +0000
+++ b/FastAnalogIn_KLXX.cpp	Mon Apr 21 07:17:39 2014 +0000
@@ -6,6 +6,8 @@
 #define MAX_FADC            6000000
 #define CHANNELS_A_SHIFT    5
 
+int FastAnalogIn::channel_usage[8] = {0,0,0,0,0,0,0,0};
+
 FastAnalogIn::FastAnalogIn(PinName pin, bool enabled)
 {
     ADCnumber = (ADCName)pinmap_peripheral(pin, PinMap_ADC);

--- a/FastAnalogIn_LPC408X.cpp	Sun Apr 20 16:23:19 2014 +0000
+++ b/FastAnalogIn_LPC408X.cpp	Mon Apr 21 07:17:39 2014 +0000
@@ -26,10 +26,9 @@
     ADCnumber = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
     if (ADCnumber == (uint32_t)NC)
         error("ADC pin mapping failed");
-    //printf("ADC_ID=%u\n",ADCnumber);
     datareg = (uint32_t*) (&LPC_ADC->DR[ADCnumber]);
 
-    wait_us(1000); // we need either the debug printf above or a wait before we try to initialize the ADC
+    wait_us(1000); // wait for a short while before trying to initialize the ADC afer a reset (needed for those global instantiations just before main)
 
     // ensure power is turned on
     LPC_SC->PCONP |= (1 << 12);