Beginning debug of SAM4L Xplained SLCD

configs/sam4l-xplained/README.txt

@@ -768,6 +768,10 @@ Configuration sub-directories
        Board Selection -> Board-Specific Options -> SAM4L Xplained Pro Modules
          CONFIG_SAM4L_XPLAINED_SLCD1MODULE=y
 
+       Device Drivers
+         CONFIG_LCD=y
+         CONFIG_LCD_MAXCONTRAST=63
+
        Library Routines -> Non-standard Library Support
          CONFIG_LIB_SLCDCODEC=y
 

configs/sam4l-xplained/src/Makefile

@@ -70,9 +70,11 @@ CSRCS += sam_slcd.c
 endif
 endif
 
+ifeq ($(CONFIG_SAM34_SPI),y)
 ifeq ($(CONFIG_SAM4L_XPLAINED_IOMODULE),y)
 CSRCS += sam_mmcsd.c
 endif
+endif
 
 COBJS = $(CSRCS:.c=$(OBJEXT))
 

configs/sam4l-xplained/src/sam4l-xplained.h

@@ -262,10 +262,23 @@ void weak_function sam_spiinitialize(void);
  *
  ************************************************************************************/
 
-#ifdef CONFIG_SAM4L_XPLAINED_IOMODULE
+#if defined(CONFIG_SAM34_SPI) && defined(CONFIG_SAM4L_XPLAINED_IOMODULE)
 int sam_sdinitialize(int minor);
 #endif
 
+/****************************************************************************
+ * Name: sam_slcd_initialize
+ *
+ * Description:
+ *   Initialize the SAM4L Xplained Pro LCD hardware and register the character
+ *   driver as /dev/slcd.
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_SAM34_LCDCA) && defined(CONFIG_SAM4L_XPLAINED_SLCD1MODULE)
+int sam_slcd_initialize(void);
+#endif
+
 /************************************************************************************
  * Name: up_ledinit
  ************************************************************************************/

configs/sam4l-xplained/src/sam_nsh.c

@@ -99,20 +99,31 @@
 
 int nsh_archinitialize(void)
 {
-#ifdef CONFIG_SAM4L_XPLAINED_IOMODULE
-  int ret;
+#if defined(CONFIG_SAM34_LCDCA) && defined(CONFIG_SAM4L_XPLAINED_SLCD1MODULE)
+  /* Initialize the SLCD and register the SLCD device as /dev/slcd */
+
+  {
+    int ret = sam_slcd_initialize();
+    if (ret < 0)
+      {
+        message("nsh_archinitialize: Failed to initialize the LCD: %d\n",
+                ret);
+        return ret;
+      }
+  }
 #endif
-
+#if defined(CONFIG_SAM34_SPI) && defined(CONFIG_SAM4L_XPLAINED_IOMODULE)
   /* Initialize the SPI-based MMC/SD slot */
 
-#ifdef CONFIG_SAM4L_XPLAINED_IOMODULE
-  ret = sam_sdinitialize(CONFIG_NSH_MMCSDMINOR);
-  if (ret < 0)
-    {
-      message("nsh_archinitialize: Failed to initialize MMC/SD slot: %d\n",
-              ret);
-      return ret;
-    }
+  {
+    int ret = sam_sdinitialize(CONFIG_NSH_MMCSDMINOR);
+    if (ret < 0)
+      {
+        message("nsh_archinitialize: Failed to initialize MMC/SD slot: %d\n",
+                ret);
+       return ret;
+      }
+  }
 #endif
 
   return OK;

configs/sam4l-xplained/src/sam_slcd.c

@@ -118,7 +118,7 @@
 #define SLCD_MAXCONTRAST       63
 
 #define BOARD_SLCD_NCOM        4
-#define BOARD_SLCD_NSEG        40
+#define BOARD_SLCD_NSEG        24
 #define SLCD_NPINS            (BOARD_SLCD_NCOM+BOARD_SLCD_NSEG+1)
 
 /* An ASCII character may need to be decorated with a preceding decimal
@@ -333,8 +333,6 @@ static gpio_pinset_t g_slcdgpio[SLCD_NPINS] =
   GPIO_LCDCA_SEG12, GPIO_LCDCA_SEG13, GPIO_LCDCA_SEG14, GPIO_LCDCA_SEG15,
   GPIO_LCDCA_SEG16, GPIO_LCDCA_SEG17, GPIO_LCDCA_SEG18, GPIO_LCDCA_SEG19,
   GPIO_LCDCA_SEG20, GPIO_LCDCA_SEG21, GPIO_LCDCA_SEG22, GPIO_LCDCA_SEG23,
-  GPIO_LCDCA_SEG24, GPIO_LCDCA_SEG25, GPIO_LCDCA_SEG26, GPIO_LCDCA_SEG27,
-  GPIO_LCDCA_SEG28, GPIO_LCDCA_SEG29, GPIO_LCDCA_SEG30,
 
   GPIO_LCD1_BL
 };
@@ -1238,7 +1236,9 @@ int sam_slcd_initialize(void)
       /* Turn on the backlight */
 
       sam_gpiowrite(GPIO_LCD1_BL, true);
+
       slcd_dumpstate("AFTER INITIALIZATION");
+      slcd_dumpslcd("AFTER INITIALIZATION");
     }
 
   return ret;

drivers/net/enc28j60.c

@@ -156,16 +156,21 @@
 
 #define ALIGNED_BUFSIZE ((CONFIG_NET_BUFSIZE + 255) & ~255)
 
-#if 0 /* Fix for Errata #5 */
-#  define PKTMEM_TX_START 0x0000           /* Start TX buffer at 0 */
-#  define PKTMEM_TX_ENDP1 ALIGNED_BUFSIZE  /* Allow TX buffer for one frame */
-#  define PKTMEM_RX_START PKTMEM_TX_ENDP1  /* Followed by RX buffer */
-#  define PKTMEM_RX_END   PKTMEM_END       /* RX buffer goes to the end of SRAM */
+/* Work around Errata #5 (spurious reset of ERXWRPT to 0) by placing the RX
+ * FIFO at the beginning of packet memory.
+ */
+
+#define ERRATA5 1
+#if ERRATA5
+#  define PKTMEM_RX_START 0x0000                            /* RX buffer must be at addr 0 for errata 5 */
+#  define PKTMEM_RX_END   (PKTMEM_END-ALIGNED_BUFSIZE)      /* RX buffer length is total SRAM minus TX buffer */
+#  define PKTMEM_TX_START (PKTMEM_RX_END+1)                 /* Start TX buffer after */
+#  define PKTMEM_TX_ENDP1 (PKTMEM_TX_START+ALIGNED_BUFSIZE) /* Allow TX buffer for one frame */
 #else
-#  define PKTMEM_RX_START 0x0000
-#  define PKTMEM_RX_END   (PKTMEM_END-ALIGNED_BUFSIZE)
-#  define PKTMEM_TX_START (PKTMEM_RX_END+1)
-#  define PKTMEM_TX_ENDP1 (PKTMEM_TX_START+ALIGNED_BUFSIZE)
+#  define PKTMEM_TX_START 0x0000                            /* Start TX buffer at 0 */
+#  define PKTMEM_TX_ENDP1 ALIGNED_BUFSIZE                   /* Allow TX buffer for one frame */
+#  define PKTMEM_RX_START PKTMEM_TX_ENDP1                   /* Followed by RX buffer */
+#  define PKTMEM_RX_END   PKTMEM_END                        /* RX buffer goes to the end of SRAM */
 #endif
 
 /* Misc. Helper Macros ******************************************************/