Add LPCXpression SD card support

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3508 42af7a65-404d-4744-a932-0658087f49c3

configs/lpcxpresso-lpc1768/README.txt

@@ -1,14 +1,14 @@
 README
 ^^^^^^
 
-README for NuttX port to the Embedded Artists' LPCXpresso base board with
+README for NuttX port to the Embedded Artists' base board with the NXP
 the LPCXpresso daughter board.
 
 Contents
 ^^^^^^^^
 
   LCPXpresso LPC1768 Board
-  Jumpers
+  Embedded Artist's Base Board
   Development Environment
   GNU Toolchain Options
   NuttX buildroot Toolchain
@@ -98,13 +98,34 @@ LCPXpresso LPC1768 Board
   P4[28]/RX-MCLK/MAT2.0/TXD3        PAD15                   N/A
   P4[29]/TX-MCLK/MAT2.1/RXD3        PAD16                   N/A
 
+Embedded Artist's Base Board
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
 Jumpers
-^^^^^^^
+-------
 
   There are many jumpers on the base board.  A usable combination is the
   default jumper settings WITH the two J54 jumpers both removed.  Those
   jumpers are for ISP support and will cause the board to reset.
 
+  To use the SD, J55 must be set to provide chip select PIO1_11 signal as
+  the SD slot chip select.
+
+SD Slot
+-------
+
+       Base-board  J4/J6 LPC1768
+  SD   Signal      Pin   Pin
+  ---  ----------- ----- --------
+  CS   PIO1_11*     55   P2.2
+  DIN  PIO0_9-MOSI   5   P0.9 MOSI1
+  DOUT PIO0_8-MISO   6   P0.8 MISO1
+  CLK  PIO2_11-SCK   7   P0.9 SCK1
+  CD   PIO2_10      52   P2.11
+
+  *J55 must be set to provide chip select PIO1_11 signal as the SD slot
+   chip select.
+
 Development Environment
 ^^^^^^^^^^^^^^^^^^^^^^^
 

configs/lpcxpresso-lpc1768/nsh/defconfig

@@ -117,7 +117,7 @@ CONFIG_LPC17_CAN1=n
 CONFIG_LPC17_CAN2=n
 CONFIG_LPC17_SPI=n
 CONFIG_LPC17_SSP0=n
-CONFIG_LPC17_SSP1=n
+CONFIG_LPC17_SSP1=y
 CONFIG_LPC17_I2C0=n
 CONFIG_LPC17_I2C1=n
 CONFIG_LPC17_I2S=n
@@ -332,7 +332,6 @@ CONFIG_HAVE_LIBM=n
 CONFIG_DEBUG=n
 CONFIG_DEBUG_VERBOSE=n
 CONFIG_DEBUG_SYMBOLS=n
-CONFIG_DEBUG_USB=n
 CONFIG_MM_REGIONS=2
 CONFIG_ARCH_LOWPUTC=y
 CONFIG_RR_INTERVAL=200
@@ -836,7 +835,7 @@ CONFIG_NSH_FATMOUNTPT=/tmp
 #
 # Architecture-specific NSH options
 #
-CONFIG_NSH_MMCSDSPIPORTNO=0
+CONFIG_NSH_MMCSDSPIPORTNO=1
 CONFIG_NSH_MMCSDSLOTNO=0
 CONFIG_NSH_MMCSDMINOR=0
 

configs/lpcxpresso-lpc1768/ostest/defconfig

@@ -780,7 +780,7 @@ CONFIG_NSH_FATMOUNTPT=/tmp
 #
 # Architecture-specific NSH options
 #
-CONFIG_NSH_MMCSDSPIPORTNO=0
+CONFIG_NSH_MMCSDSPIPORTNO=1
 CONFIG_NSH_MMCSDSLOTNO=0
 CONFIG_NSH_MMCSDMINOR=0
 

configs/lpcxpresso-lpc1768/src/Makefile

@@ -39,9 +39,11 @@ CFLAGS		+= -I$(TOPDIR)/sched
 
 ASRCS		= 
 CSRCS		= up_boot.c up_leds.c up_ssp.c
+
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS		+= up_nsh.c
 endif
+
 ifeq ($(CONFIG_USBSTRG),y)
 CSRCS		+= up_usbstrg.c
 endif

configs/lpcxpresso-lpc1768/src/lpcxpresso_internal.h

@@ -134,6 +134,25 @@
  * P4[28]/RX-MCLK/MAT2.0/TXD3        PAD15                   N/A
  * P4[29]/TX-MCLK/MAT2.1/RXD3        PAD16                   N/A
  */
+ 
+/* SD Slot
+ *
+ *      Base-board  J4/J6 LPC1768
+ * SD   Signal      Pin   Pin
+ * ---  ----------- ----- --------
+ * CS   PIO1_11*     55   P2.2        (See GPIO_SD_CS)
+ * DIN  PIO0_9-MOSI   5   P0.9 MOSI1  (See GPIO_SSP1_MOSI in lpc17_internal.h)
+ * DOUT PIO0_8-MISO   6   P0.8 MISO1  (See GPIO_SSP1_MISO in lpc17_internal.h)
+ * CLK  PIO2_11-SCK   7   P0.9 SCK1   (See GPIO_SSP1_SCK in board.h)
+ * CD   PIO2_10      52   P2.11       (See GPIO_SD_CD)
+ */
+
+#define GPIO_SD_CS   (GPIO_OUTPUT  | GPIO_VALUE_ONE | GPIO_PORT2 | GPIO_PIN2)
+#ifdef CONFIG_GPIO_IRQ
+#  define GPIO_SD_CD (GPIO_INTBOTH | GPIO_PULLUP    | GPIO_PORT2 | GPIO_PIN11)
+#else
+#  define GPIO_SD_CD (GPIO_INPUT   | GPIO_PULLUP    | GPIO_PORT2 | GPIO_PIN11)
+#endif
 
 /************************************************************************************
  * Public Types

configs/lpcxpresso-lpc1768/src/up_nsh.c

@@ -57,8 +57,8 @@
 
 #ifdef CONFIG_ARCH_BOARD_LPCXPRESSO
 #  define CONFIG_NSH_HAVEUSBDEV 1
-#  ifdef CONFIG_LPC17_SSP0
+#  ifdef CONFIG_LPC17_SSP1
-#    define CONFIG_NSH_HAVEMMCSD  1
+#    define CONFIG_NSH_HAVEMMCSD 1
 #  else
 #    undef CONFIG_NSH_HAVEMMCSD
 #  endif
@@ -71,13 +71,13 @@
 /* Do we have SPI support for MMC/SD? */
 
 #ifdef CONFIG_NSH_HAVEMMCSD
-#  if !defined(CONFIG_NSH_MMCSDSPIPORTNO) || CONFIG_NSH_MMCSDSPIPORTNO != 0
+#  if !defined(CONFIG_NSH_MMCSDSPIPORTNO) || CONFIG_NSH_MMCSDSPIPORTNO != 1
-#    error "The LPCXpresso MMC/SD is on SSP0"
+#    error "The LPCXpresso MMC/SD is on SSP1"
 #    undef CONFIG_NSH_MMCSDSPIPORTNO
-#    define CONFIG_NSH_MMCSDSPIPORTNO 0
+#    define CONFIG_NSH_MMCSDSPIPORTNO 1
 #  endif
 #  if !defined(CONFIG_NSH_MMCSDSLOTNO) || CONFIG_NSH_MMCSDSLOTNO != 0
-#    error "The LPCXpresso MMC/SD is only one slot (0)"
+#    error "The LPCXpresso MMC/SD has only one slot (0)"
 #    undef CONFIG_NSH_MMCSDSLOTNO
 #    define CONFIG_NSH_MMCSDSLOTNO 0
 #  endif

configs/lpcxpresso-lpc1768/src/up_ssp.c

@@ -2,7 +2,7 @@
  * configs/lpcxpresso-lpc1768/src/up_ssp.c
  * arch/arm/src/board/up_ssp.c
  *
- *   Copyright (C) 2010 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -107,7 +107,16 @@ void weak_function lpc17_sspinitialize(void)
   /* Configure the SPI-based microSD CS GPIO */
 
   ssp_dumpgpio("lpc17_sspinitialize() Entry)");
-#warning "Configure chip selects here"  
+
+  /* Configure card detect and chip select for the SD slot.  NOTE:  Jumper J55 must
+   * be set correctly for the SD slot chip select.
+   */
+
+#ifdef CONFIG_LPC17_SSP1
+  (void)lpc17_configgpio(GPIO_SD_CS);
+  (void)lpc17_configgpio(GPIO_SD_CD);
+#endif
+
   ssp_dumpgpio("lpc17_sspinitialize() Exit");
 }
 
@@ -140,11 +149,11 @@ void weak_function lpc17_sspinitialize(void)
 void  lpc17_ssp0select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
 {
   sspdbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
-  ssp_dumpgpio("lpc17_spiselect() Entry");
+  ssp_dumpgpio("lpc17_spi0select() Entry");
 
 #warning "Assert CS here (false)"
 
-  ssp_dumpgpio("lpc17_spiselect() Exit");
+  ssp_dumpgpio("lpc17_spi0select() Exit");
 }
 
 uint8_t lpc17_ssp0status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
@@ -155,7 +164,37 @@ uint8_t lpc17_ssp0status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
 #endif
 
 #ifdef CONFIG_LPC17_SSP1
-# warning "SSP1 chip selects not known"
+void  lpc17_ssp1select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
+{
+  sspdbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
+  ssp_dumpgpio("lpc17_spi1select() Entry");
+
+  if (devid == SPIDEV_MMCSD)
+    {
+      /* Assert/de-assert the CS pin to the card */
+
+      (void)lpc17_gpiowrite(GPIO_SD_CS, !selected);
+    }
+
+  ssp_dumpgpio("lpc17_spi1select() Exit");
+}
+
+uint8_t lpc17_ssp1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
+{
+  if (devid == SPIDEV_MMCSD)
+    {
+      /* Read the state of the card-detect bit */
+
+      if (lpc17_gpioread(GPIO_SD_CD) == 0)
+        {
+          sspdbg("Returning SPI_STATUS_PRESENT\n");
+          return SPI_STATUS_PRESENT;
+        }
+    }
+
+  sspdbg("Returning zero\n");
+  return 0;
+}
 #endif
 
 #endif /* CONFIG_LPC17_SSP0 || CONFIG_LPC17_SSP1 */