From ca08ac22269b1fe54d9d959d5facf27e6ca322b5 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Fri, 16 Dec 2011 19:56:47 +0000
Subject: Fix the data format used in apps/examples/adc

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4193 42af7a65-404d-4744-a932-0658087f49c3
---
 apps/examples/README.txt     |  2 --
 apps/examples/adc/adc.h      | 47 --------------------------------------------
 apps/examples/adc/adc_main.c | 17 ++++++++--------
 3 files changed, 9 insertions(+), 57 deletions(-)

(limited to 'apps/examples')

diff --git a/apps/examples/README.txt b/apps/examples/README.txt
index 61166c438..4460e2c66 100644
--- a/apps/examples/README.txt
+++ b/apps/examples/README.txt
@@ -46,8 +46,6 @@ examples/adc
       indefinitely.
     - CONFIG_EXAMPLES_ADC_GROUPSIZE - The number of samples to read at once.
       Default: 4
-    - CONFIG_EXAMPLES_ADC_SAMPLEWIDTH - The width (in bits) of the on ADC sample.
-      Default: 16
 
 examples/buttons
 ^^^^^^^^^^^^^^^^
diff --git a/apps/examples/adc/adc.h b/apps/examples/adc/adc.h
index e6d9dd7bd..901f84940 100755
--- a/apps/examples/adc/adc.h
+++ b/apps/examples/adc/adc.h
@@ -56,8 +56,6 @@
  *   indefinitely.
  * CONFIG_EXAMPLES_ADC_GROUPSIZE - The number of samples to read at once.
  *   Default: 4
- * CONFIG_EXAMPLES_ADC_SAMPLEWIDTH - The width (in bits) of the on ADC sample.
- *   Default: 16
  */
 
 #ifndef CONFIG_ADC
@@ -72,39 +70,6 @@
 #  define CONFIG_EXAMPLES_ADC_GROUPSIZE 4
 #endif
 
-#ifndef CONFIG_EXAMPLES_ADC_SAMPLEWIDTH
-#  define CONFIG_EXAMPLES_ADC_SAMPLEWIDTH 16
-#endif
-
-/* Sample characteristics ***************************************************/
-
-#undef ADC_SAMPLE_BYTEWIDTH
-#if CONFIG_EXAMPLES_ADC_SAMPLEWIDTH <= 8
-#  undef CONFIG_EXAMPLES_ADC_SAMPLEWIDTH
-#  define CONFIG_EXAMPLES_ADC_SAMPLEWIDTH 8
-#  define ADC_SAMPLE_BYTEWIDTH 1
-#  define SAMPLE_FMT "%02x"
-#elif CONFIG_EXAMPLES_ADC_SAMPLEWIDTH <= 16
-#  undef CONFIG_EXAMPLES_ADC_SAMPLEWIDTH
-#  define CONFIG_EXAMPLES_ADC_SAMPLEWIDTH 16
-#  define ADC_SAMPLE_BYTEWIDTH 2
-#  define SAMPLE_FMT "%04x"
-#elif CONFIG_EXAMPLES_ADC_SAMPLEWIDTH <= 24
-#  undef CONFIG_EXAMPLES_ADC_SAMPLEWIDTH
-#  define CONFIG_EXAMPLES_ADC_SAMPLEWIDTH 24
-#  define ADC_SAMPLE_BYTEWIDTH 3
-#  define SAMPLE_FMT "%06x"
-#elif CONFIG_EXAMPLES_ADC_SAMPLEWIDTH <= 32
-#  undef CONFIG_EXAMPLES_ADC_SAMPLEWIDTH
-#  define CONFIG_EXAMPLES_ADC_SAMPLEWIDTH 32
-#  define ADC_SAMPLE_BYTEWIDTH 4
-#  define SAMPLE_FMT "%08x"
-#else
-#  error "Unsupported sample width"
-#endif
-
-#undef ADC_SAMPLE_SIZE (CONFIG_EXAMPLES_ADC_GROUPSIZE * ADC_SAMPLE_BYTEWIDTH)
-
 /* Debug ********************************************************************/
 
 #ifdef CONFIG_CPP_HAVE_VARARGS
@@ -129,18 +94,6 @@
  * Public Types
  ****************************************************************************/
 
-#if CONFIG_EXAMPLES_ADC_SAMPLEWIDTH == 8
-typedef uint8_t adc_sample_t;
-#elif CONFIG_EXAMPLES_ADC_SAMPLEWIDTH == 16
-typedef uint16_t adc_sample_t;
-#elif CONFIG_EXAMPLES_ADC_SAMPLEWIDTH == 24
-typedef uint32_t adc_sample_t;
-#elif CONFIG_EXAMPLES_ADC_SAMPLEWIDTH == 32
-typedef uint32_t adc_sample_t;
-#else
-#  error "Unsupported sample width"
-#endif
-
 /****************************************************************************
  * Public Variables
  ****************************************************************************/
diff --git a/apps/examples/adc/adc_main.c b/apps/examples/adc/adc_main.c
index e85ee7653..176e7a191 100644
--- a/apps/examples/adc/adc_main.c
+++ b/apps/examples/adc/adc_main.c
@@ -94,9 +94,9 @@
 
 int MAIN_NAME(int argc, char *argv[])
 {
-  uint8_t sample[ADC_SAMPLE_SIZE];
+  struct adc_msg_s samples[CONFIG_EXAMPLES_ADC_GROUPSIZE];
+  size_t readsize;
   ssize_t nbytes;
-  FAR adc_sample_t *ptr;
 #if defined(CONFIG_NSH_BUILTIN_APPS) || defined(CONFIG_EXAMPLES_ADC_NSAMPLES)
   long nsamples;
 #endif
@@ -165,9 +165,10 @@ int MAIN_NAME(int argc, char *argv[])
 
     msgflush();
 
-    /* Read one sample of size ADC_SAMPLE_SIZE */
+    /* Read CONFIG_EXAMPLES_ADC_GROUPSIZE samples */
 
-    nbytes = read(fd, sample, ADC_SAMPLE_SIZE);
+    readsize = CONFIG_EXAMPLES_ADC_GROUPSIZE * sizeof(struct adc_msg_s);
+    nbytes = read(fd, sample, readsize);
     message("Bytes read: %d\n", nbytes);
 
     /* Handle unexpected return values */
@@ -185,10 +186,10 @@ int MAIN_NAME(int argc, char *argv[])
 
         message(MAIN_STRING "Interrupted read...\n");
       }
-    else if (nbytes != ADC_SAMPLE_SIZE)
+    else if (nbytes != readsize)
       {
         message(MAIN_STRING "Unexpected read size=%d, expected=%d, Ignoring\n",
-                nbytes, ADC_SAMPLE_SIZE);        
+                nbytes, readsize);        
       }
 
     /* Print the sample data on successful return */
@@ -196,10 +197,10 @@ int MAIN_NAME(int argc, char *argv[])
     else
       {
         message("Sample :\n");
-        ptr = (FAR adc_sample_t*)sample;
         for (i = 0; i < CONFIG_EXAMPLES_ADC_GROUPSIZE; i++)
           {
-            message("%d: " SAMPLE_FMT "\n", i, ptr[i]);
+            message("%d: channel: %d value: %d\n",
+                     i, sample[i].am_channel, sample[i].am_data);
           }
       }
   }
-- 
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