More changes from Uros

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@3431 7fd9a85b-ad96-42d3-883c-3090e2eb8679

3 files changed, 53 insertions, 0 deletions

diff --git a/nuttx/configs/vsn/nsh/defconfig b/nuttx/configs/vsn/nsh/defconfig
index 875da63f8d..1d2bbe0c94 100755
--- a/nuttx/configs/vsn/nsh/defconfig
+++ b/nuttx/configs/vsn/nsh/defconfig
@@ -504,6 +504,13 @@ CONFIG_FS_FAT=y
 CONFIG_FS_ROMFS=y
 
 #
+# I2C Settings
+#
+CONFIG_I2C_WRITEREAD=y
+CONFIG_I2C_TRANSFER=y
+CONFIG_I2C_SLAVE=n
+
+#
 # SPI-based MMC/SD driver
 #
 # CONFIG_MMCSD_NSLOTS
@@ -858,3 +865,6 @@ CONFIG_HEAP_SIZE=
 # Application configuration
 
 CONFIG_APPS_DIR="../apps"
+
+# Provide /dev/ramX and then: mount -t binfs /dev/ram0 /bin
+CONFIG_APPS_BINDIR=y
diff --git a/nuttx/configs/vsn/src/rtac.c b/nuttx/configs/vsn/src/rtac.c
index b953bd8515..68b94a169d 100644
--- a/nuttx/configs/vsn/src/rtac.c
+++ b/nuttx/configs/vsn/src/rtac.c
@@ -80,3 +80,27 @@ int rtac_waitg(int group, int time)
 {
     // blocking variant of rtac_exec with timeout if specified
 }
+
+
+/** Power optimization of base systick timer
+ * 
+ * 1. Simple method to skip wake-ups:
+ *  - ask timers about the min. period, which is Ns * systick
+ *  - set the preload register with floor(Ns) * DEFAULT_PRELOAD
+ *  - on wake-up call routines Ns times.
+ * 
+ * 2. If intermediate ISR occuried then:
+ *  - check how many periods have passed by reading the counter: Np
+ *  - set the new counter value as (counter % DEFAULT_PRELOAD)
+ *  - call timer routines Np times; the next call is as usual, starting
+ *    at 1. point above
+ * 
+ * This is okay if ISR's do not read timers, if they read timers then:
+ *  - on ISR wake-up the code described under 2. must be called first
+ *    (on wake-up from IDLE)
+ * 
+ * BUT: the problem is that SYSTICK does not run in Stop mode but RTC
+ *   only, so it might be better to replace SYSTICK with RTAC (this
+ *   module) and do the job above, permitting ultra low power modes of
+ *   25 uA or further down to 5 uA.
+ */
diff --git a/nuttx/configs/vsn/src/sif.c b/nuttx/configs/vsn/src/sif.c
index 9d5f8af6a3..c1813df83e 100644
--- a/nuttx/configs/vsn/src/sif.c
+++ b/nuttx/configs/vsn/src/sif.c
@@ -273,6 +273,25 @@ int sif_gpios_unlock(vsn_sif_state_t peripheral)
 
 
 /****************************************************************************
+ * ST LIS331DL
+ ****************************************************************************/ 
+
+void st_lis331dl_open(void)
+{
+}
+
+
+void st_lis331dl_config(void)
+{
+}
+
+
+void st_lis331dl_getreadings(void)
+{
+}
+
+
+/****************************************************************************
  * Analog Outputs
  ****************************************************************************/