Several fixes to get a clean compile of the Arduino touch screen

configs/arduino-due/README.txt

@@ -1024,6 +1024,9 @@ Configuration sub-directories
        Application Configuration -> NSH Library
          CONFIG_NSH_ARCHINIT=y             : Board has architecture-specific initialization
 
+       STATUS:
+       2013-7-2:  SD card is not responding.  All 0's received on SPI.
+
     3. This configuration has been used for verifying the touchscreen on
        on the ITEAD TFT Shield.  With the modifications below, you can
        include the touchscreen test program at apps/examples/touchscreen as
@@ -1043,6 +1046,13 @@ Configuration sub-directories
          CONFIG_SPI_BITBANG=y              : Enable SPI bit-bang support
 
          CONFIG_INPUT=y                    : Enable support for input devices
+         CONFIG_INPUT_ADS7843E=y           : Enable support for the XPT2046
+         CONFIG_ADS7843E_SPIDEV=0          : (Doesn't matter)
+         CONFIG_ADS7843E_SPIMODE=0         : Use SPI mode 0
+         CONFIG_ADS7843E_FREQUENCY=1000000 : SPI BAUD 1MHz
+         CONFIG_ADS7843E_SWAPXY=y          : If landscpe orientation
+         CONFIG_ADS7843E_THRESHX=51        : These will probably need to be tuned
+         CONFIG_ADS7843E_THRESHY=39
 
        System Type:
          CONFIG_GPIO_IRQ=y                 : GPIO interrupt support
@@ -1064,3 +1074,7 @@ Configuration sub-directories
          CONFIG_DEBUG=y                    : Enable debug features
          CONFIG_DEBUG_VERBOSE=y            : Enable verbose debug output
          CONFIG_DEBUG_INPUT=y              : Enable debug output from input devices
+
+       STATUS:
+       2013-7-2:  TSC is not responding.  All 0's received on SPI.
+

configs/arduino-due/src/arduino-due.h

@@ -248,7 +248,7 @@
 
 #    define GPIO_TSC_IRQ  (GPIO_INPUT | GPIO_CFG_PULLUP | GPIO_INT_BOTHEDGES | \
                            GPIO_PORT_PIOC | GPIO_PIN21)
-#    define SAM_TCS_IRQ   SAM_IRQ_PC21
+#    define SAM_TSC_IRQ   SAM_IRQ_PC21
 #  endif
 
   /* Only CONFIG_LCD is expected to enable the TFT LCD */

configs/arduino-due/src/sam_touchscreen.c

@@ -264,22 +264,22 @@ static int tsc_attach(FAR struct ads7843e_config_s *state, xcpt_t isr)
 {
   /* Attach the XPT2046 interrupt */
 
-  ivdbg("Attaching %p to IRQ %d\n", isr, SAM_TCS_IRQ);
+  ivdbg("Attaching %p to IRQ %d\n", isr, SAM_TSC_IRQ);
-  return irq_attach(SAM_TCS_IRQ, isr);
+  return irq_attach(SAM_TSC_IRQ, isr);
 }
 
 static void tsc_enable(FAR struct ads7843e_config_s *state, bool enable)
 {
   /* Attach and enable, or detach and disable */
 
-  ivdbg("IRQ:%d enable:%d\n", SAM_TCS_IRQ, enable);
+  ivdbg("IRQ:%d enable:%d\n", SAM_TSC_IRQ, enable);
   if (enable)
     {
-      sam_gpioirqenable(SAM_TCS_IRQ);
+      sam_gpioirqenable(SAM_TSC_IRQ);
     }
   else
     {
-      sam_gpioirqdisable(SAM_TCS_IRQ);
+      sam_gpioirqdisable(SAM_TSC_IRQ);
     }
 }
 
@@ -290,31 +290,14 @@ static void tsc_clear(FAR struct ads7843e_config_s *state)
 
 static bool tsc_busy(FAR struct ads7843e_config_s *state)
 {
-#if defined(CONFIG_DEBUG_INPUT) && defined(CONFIG_DEBUG_VERBOSE)
+  return false; /* The BUSY signal is not connected */
-  static bool last = (bool)-1;
-#endif
-
-  /* BUSY is high impedance when CS is high (not selected).  When CS is
-   * is low, BUSY is active high.
-   */
-
-  bool busy = sam_gpioread(GPIO_TCS_BUSY);
-#if defined(CONFIG_DEBUG_INPUT) && defined(CONFIG_DEBUG_VERBOSE)
-  if (busy != last)
-    {
-      ivdbg("busy:%d\n", busy);
-      last = busy;
-    }
-#endif
-
-  return busy;
 }
 
 static bool tsc_pendown(FAR struct ads7843e_config_s *state)
 {
   /* The /PENIRQ value is active low */
 
-  bool pendown = !sam_gpioread(GPIO_TCS_IRQ);
+  bool pendown = !sam_gpioread(GPIO_TSC_IRQ);
   ivdbg("pendown:%d\n", pendown);
   return pendown;
 }
@@ -382,7 +365,7 @@ int arch_tcinitialize(int minor)
 
   /* Configure the PIO interrupt */
 
-  sam_gpioirq(SAM_TCS_IRQ);
+  sam_gpioirq(SAM_TSC_IRQ);
 
   /* Get an instance of the SPI interface for the touchscreen chip select */
 

configs/sam3u-ek/README.txt

@@ -589,7 +589,7 @@ Configurations
             CONFIG_SPI_OWNBUS=y               : Smaller code if this is the only SPI device
 
             CONFIG_INPUT=y                    : Enable support for input devices
-            CONFIG_INPUT_ADS7843E=y           : Enable support for the XPT2048
+            CONFIG_INPUT_ADS7843E=y           : Enable support for the XPT2046
             CONFIG_ADS7843E_SPIDEV=2          : Use SPI CS 2 for communication
             CONFIG_ADS7843E_SPIMODE=0         : Use SPI mode 0
             CONFIG_ADS7843E_FREQUENCY=1000000 : SPI BAUD 1MHz