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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-03-24 22:39:52 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-03-24 22:39:52 +0000 |
commit | bf30dc09b0c7d49d556196f4d35b5e0fef2c7e7e (patch) | |
tree | 9d17b838409ed72734f9362eab88660822390803 /nuttx/drivers/README.txt | |
parent | 6ac0ffb209453e30023446fbf5b208f1f79604f2 (diff) | |
download | px4-nuttx-bf30dc09b0c7d49d556196f4d35b5e0fef2c7e7e.tar.gz px4-nuttx-bf30dc09b0c7d49d556196f4d35b5e0fef2c7e7e.tar.bz2 px4-nuttx-bf30dc09b0c7d49d556196f4d35b5e0fef2c7e7e.zip |
Additional documentation/README updates
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4519 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/drivers/README.txt')
-rw-r--r-- | nuttx/drivers/README.txt | 145 |
1 files changed, 80 insertions, 65 deletions
diff --git a/nuttx/drivers/README.txt b/nuttx/drivers/README.txt index ff67d8ede..e27e8c583 100644 --- a/nuttx/drivers/README.txt +++ b/nuttx/drivers/README.txt @@ -13,109 +13,124 @@ Files in this directory ^^^^^^^^^^^^^^^^^^^^^^^ can.c - An unfinished CAN driver. + This is a CAN driver. See include/nuttx/can.h for usage information. dev_null.c and dev_zero.c - These files provide the standard /dev/null and /dev/zero devices. - See include/nuttx/fs/fs.h for functions that should be called if you - want to register these devices (devnull_register() and - devzero_register()). + These files provide the standard /dev/null and /dev/zero devices. + See include/nuttx/fs/fs.h for functions that should be called if you + want to register these devices (devnull_register() and + devzero_register()). loop.c - Supports the standard loop device that can be used to export a - file (or character device) as a block device. See losetup() and - loteardown() in include/nuttx/fs/fs.h. + Supports the standard loop device that can be used to export a + file (or character device) as a block device. See losetup() and + loteardown() in include/nuttx/fs/fs.h. + +pwm.c + Provides the "upper half" of a pulse width modulation (PWM) driver. + The "lower half" of the PWM driver is provided by device-specific + logic. See include/nuttx/pwm.h for usage information. ramdisk.c - Can be used to set up a block of memory or (read-only) FLASH as - a block driver that can be mounted as a files system. See - include/nuttx/ramdisk.h. + Can be used to set up a block of memory or (read-only) FLASH as + a block driver that can be mounted as a files system. See + include/nuttx/ramdisk.h. ramlog.c - This is a driver that was intended to support debugging output, - aka syslogging, when the normal serial output is not available. - For example, if you are using a telnet or USB serial console, - the debug output will get lost. + This is a driver that was intended to support debugging output, + aka syslogging, when the normal serial output is not available. + For example, if you are using a telnet or USB serial console, + the debug output will get lost. - This driver is similar to a pipe in that it saves the debugging - output in a FIFO in RAM. It differs from a pipe in numerous - details as needed to support logging. + This driver is similar to a pipe in that it saves the debugging + output in a FIFO in RAM. It differs from a pipe in numerous + details as needed to support logging. - This driver is built when CONFIG_RAMLOG is defined in the Nuttx - configuration. + This driver is built when CONFIG_RAMLOG is defined in the Nuttx + configuration. rwbuffer.c - A facility that can be use by any block driver in-order to add - writing buffering and read-ahead buffering. + A facility that can be use by any block driver in-order to add + writing buffering and read-ahead buffering. Subdirectories of this directory: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ analog/ - This directory holds implementations of analog device drivers. - This includes drivers for Analog to Digital Conversion (ADC) as - well as drivers for Digital to Analog Conversion (DAC). - See include/nuttx/analog/*.h for registration information. + This directory holds implementations of analog device drivers. + This includes drivers for Analog to Digital Conversion (ADC) as + well as drivers for Digital to Analog Conversion (DAC). + See include/nuttx/analog/*.h for registration information. bch/ - Contains logic that may be used to convert a block driver into - a character driver. This is the complementary conversion as that - performed by loop.c. See include/nuttx/fs/fs.h for registration - information. + Contains logic that may be used to convert a block driver into + a character driver. This is the complementary conversion as that + performed by loop.c. See include/nuttx/fs/fs.h for registration + information. -analog/ - This directory holds implementations of input device drivers. - This includes such things as touchscreen and keypad drivers. - See include/nuttx/input/*.h for registration information. +input/ + This directory holds implementations of input device drivers. + This includes such things as touchscreen and keypad drivers. + See include/nuttx/input/*.h for registration information. lcd/ - Drivers for parallel and serial LCD and OLED type devices. These - drivers support interfaces as defined in include/nuttx/lcd/lcd.h + Drivers for parallel and serial LCD and OLED type devices. These + drivers support interfaces as defined in include/nuttx/lcd/lcd.h mmcsd/ - Support for MMC/SD block drivers. MMC/SD block drivers based on - SPI and SDIO/MCI interfaces are supported. See include/nuttx/mmcsd.h - and include/nuttx/sdio.h for further information. + Support for MMC/SD block drivers. MMC/SD block drivers based on + SPI and SDIO/MCI interfaces are supported. See include/nuttx/mmcsd.h + and include/nuttx/sdio.h for further information. mtd/ - Memory Technology Device (MTD) drivers. Some simple drivers for - memory technologies like FLASH, EEPROM, NVRAM, etc. See - include/nuttx/mtd.h + Memory Technology Device (MTD) drivers. Some simple drivers for + memory technologies like FLASH, EEPROM, NVRAM, etc. See + include/nuttx/mtd.h - (Note: This is a simple memory interface and should not be - confused with the "real" MTD developed at infradead.org. This - logic is unrelated; I just used the name MTD because I am not - aware of any other common way to refer to this class of devices). + (Note: This is a simple memory interface and should not be + confused with the "real" MTD developed at infradead.org. This + logic is unrelated; I just used the name MTD because I am not + aware of any other common way to refer to this class of devices). net/ - Network interface drivers. See also include/nuttx/net/net.h + Network interface drivers. See also include/nuttx/net/net.h pipes/ - FIFO and named pipe drivers. Standard interfaces are declared - in include/unistd.h + FIFO and named pipe drivers. Standard interfaces are declared + in include/unistd.h -pm/ - Power management (PM) driver interfaces. These interfaces are used - to manage power usage of a platform by monitoring driver activity - and by placing drivers into reduce power usage modes when the - drivers are not active. +power/ + Power management (PM) driver interfaces. These interfaces are used + to manage power usage of a platform by monitoring driver activity + and by placing drivers into reduce power usage modes when the + drivers are not active. sensors/ - Drivers for various sensors + Drivers for various sensors + +sercomm/ + Sercomm is the transport used by osmocom-bb that runs on top of serial. + See http://bb.osmocom.org/trac/wiki/nuttx-bb/run for detailed the usage + of nuttx with sercomm. + + drivers/sercomm is only built if CONFIG_SERCOMM_CONSOLE in the NuttX + configuration file. If you attempt to build this driver without + osmocom-bb, you will get compilation errors because of header files + that are needed from the osmocom-bb. serial/ - Front-end character drivers for chip-specific UARTs. This provide - some TTY-like functionality and are commonly used (but not required for) - the NuttX system console. See also include/nuttx/serial/serial.h + Front-end character drivers for chip-specific UARTs. This provide + some TTY-like functionality and are commonly used (but not required for) + the NuttX system console. See also include/nuttx/serial/serial.h usbdev/ - USB device drivers. See also include/nuttx/usb/usbdev.h + USB device drivers. See also include/nuttx/usb/usbdev.h usbhost/ - USB host drivers. See also include/nuttx/usb/usbhost.h + USB host drivers. See also include/nuttx/usb/usbhost.h wireless/ - Drivers for various wireless devices. + Drivers for various wireless devices. Skeleton Files ^^^^^^^^^^^^^^ @@ -124,7 +139,7 @@ Skeleton files a "empty" frameworks for NuttX drivers. They are provided to give you a good starting point if you want to create a new NuttX driver. The following skeleton files are available: - drivers/lcd/skeleton.c -- Skeleton LCD driver - drivers/mtd/skeleton.c -- Skeleton memory technology device drivers - drivers/net/skeleton.c -- Skeleton network/Ethernet drivers - drivers/usbhost/usbhost_skeleton.c -- Skeleton USB host class driver + drivers/lcd/skeleton.c -- Skeleton LCD driver + drivers/mtd/skeleton.c -- Skeleton memory technology device drivers + drivers/net/skeleton.c -- Skeleton network/Ethernet drivers + drivers/usbhost/usbhost_skeleton.c -- Skeleton USB host class driver |