diff options
Diffstat (limited to 'nuttx/configs/pic32mx7mmb/README.txt')
| -rw-r--r-- | nuttx/configs/pic32mx7mmb/README.txt | 85 |
1 files changed, 42 insertions, 43 deletions
diff --git a/nuttx/configs/pic32mx7mmb/README.txt b/nuttx/configs/pic32mx7mmb/README.txt index 197602c7a..4d9e42d11 100644 --- a/nuttx/configs/pic32mx7mmb/README.txt +++ b/nuttx/configs/pic32mx7mmb/README.txt @@ -579,22 +579,49 @@ Where <subdir> is one of the following: CONFIG_PIC32MX_SPI1=y CONFIG_NSH_ARCHINIT=y - USB Configurations. - ------------------ - Several USB device configurations can be enabled and included - as NSH built-in built in functions. USB is *not* enabled by default. + The SD card can be mounted from the NSH command line as follows: - To use USB device, connect the starter kit to the host using a cable - with a Type-B micro-plug to the starter kit’s micro-A/B port J5, located - on the bottom side of the starter kit. The other end of the cable - must have a Type-A plug. Connect it to a USB host. Jumper JP2 should be - removed. + nsh> mount -t vfat /dev/mmcsd0 /mnt/sdcard + nsh> ls -l /mnt/sdcard + /mnt/sdcard: + -rw-rw-rw- 16 ATEST.TXT + -rw-rw-rw- 21170 TODO + -rw-rw-rw- 22 ANOTHER.TXT + -rw-rw-rw- 22 HI2148.TXT + -rw-rw-rw- 16 HiFromNotePad.txt - All USB device configurations require the following basic setup in - your NuttX configuration file to enable USB device support: + USB Configurations. + ------------------ + USB device support is enabled by default in this configuration. + The following settings are defined by default (and can be set + to 'n' to disabled USB device support). CONFIG_USBDEV=y : Enable basic USB device support CONFIG_PIC32MX_USBDEV=y : Enable PIC32 USB device support + CONFIG_USBMSC=y : USB supports a mass storage device. + + In this configuration, NSH will support the following commands: + + msconn : Connect the mass storage device, exportint the SD + card as the USB mass storage logical unit. + msdis : Disconnect the USB mass storage device + + NOTE: The SD card should *not* be mounted under NSH *and* exported + by the mass storage device!!! That can result in corruption of the + SD card format. This is the sequence of commands that you should + used to work the the SD card safely: + + mount -t vfat /dev/mmcsd0 /mnt/sdcard : Mount the SD card initially + ... + umount /mnt/sdcard : Unmount the SD card before connecting + msconn : Connect the USB MSC + ... + msdis : Disconnect the USB MSC + mount -t vfat /dev/mmcsd0 /mnt/sdcard : Re-mount the SD card + ... + + Other USB other device configurations can be enabled and + included as NSH built-in built in functions. examples/usbterm - This option can be enabled by uncommenting the following line in the appconfig file: @@ -603,6 +630,7 @@ Where <subdir> is one of the following: And by enabling one of the USB serial devices: + CONFIG_USBMSC=n : Disable USB mass storage device. CONFIG_PL2303=y : Enable the Prolifics PL2303 emulation CONFIG_CDCACM=y : or the CDC/ACM serial driver (not both) @@ -613,12 +641,9 @@ Where <subdir> is one of the following: and defining the following in your .config file: + CONFIG_USBMSC=n : Disable USB mass storage device. CONFIG_CDCACM=y : Enable the CDCACM device - examples/usbstorage - There are some hooks in the appconfig file - to enable the USB mass storage device. However, this device cannot - work until support for the SD card is also incorporated. - Networking Configurations. -------------------------- Networking is enabled by default in this configuration: @@ -714,34 +739,8 @@ Where <subdir> is one of the following: NOTE: This modification should be considered experimental. IN the little testing I have done with it, it appears functional. But the logic has not been stressed and there could still be lurking issues. - - Update. The following was added to the top-level TODO list: - - Title: PIC32 USB DRIVER DOES NOT WORK WITH MASS STORAGE CLASS - Description: The PIC32 USB driver either crashes or hangs when used with - the mass storage class when trying to write files to the target - storage device. This usually works with debug on, but does not - work with debug OFF (implying some race condition?) - - Here are some details of what I see in debugging: - - 1. The USB MSC device completes processing of a read request - and returns the read request to the driver. - 2. Before the MSC device can even begin the wait for the next - driver, many packets come in at interrupt level. The MSC - device goes to sleep (on pthread_cond_wait) with all of the - read buffers ready (16 in my test case). - 3. The pthread_cond_wait() does not wake up. This implies - a problem with pthread_con_wait(?). But in other cases, - the MSC device does wake up, but then immediately crashes - because its stack is bad. - 4. If I force the pthread_cond_wait to wake up (by using - pthread_cond_timedwait instead), then the thread wakes - up and crashes with a bad stack. - - So far, I have no clue why this is failing. - Status: Open - Priority: High + (There is a bug associated with this configuration listed in the + top-level TODO list). Adding LCD and graphics support to the nsh configuration: -------------------------------------------------------- |