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Diffstat (limited to 'nuttx/configs/dk-tm4c129x/README.txt')
| -rw-r--r-- | nuttx/configs/dk-tm4c129x/README.txt | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/nuttx/configs/dk-tm4c129x/README.txt b/nuttx/configs/dk-tm4c129x/README.txt index 49f356340..720a522bf 100644 --- a/nuttx/configs/dk-tm4c129x/README.txt +++ b/nuttx/configs/dk-tm4c129x/README.txt @@ -36,6 +36,7 @@ Contents - Buttons and LEDs - Serial Console - Networking Support + - Temperature Sensor - DK-TM4129X Configuration Options - Configurations @@ -648,6 +649,37 @@ f Application Configuration -> Network Utilities CONFIG_NSH_NETINIT_RETRYMSEC=2000 : Configure the network monitor as you like CONFIG_NSH_NETINIT_SIGNO=18 +Temperature Sensor +================== + + Support for the on-board TMP-100 temperature sensor is available. This + uses the driver for the compatible LM-75 part. To set up the temperature + sensor, add the following to the NuttX configuration file: + + System Type -> Tiva/Stellaris Peripheral Selection + CONFIG_TIVA_I2C6=y + + Drivers -> I2C Support + CONFIG_I2C=y + + Drivers -> Sensors + CONFIG_I2C_LM75=y + + Then you can implement logic like the following to use the temperature sensor: + + #include <nuttx/sensors/lm75.h> + #include <arch/board/board.h> + + ret = tiva_tmp100_initialize("/dev/temp"); /* Register the temperature sensor */ + fd = open("/dev/temp", O_RDONLY); /* Open the temperature sensor device */ + ret = ioctl(fd, SNIOC_FAHRENHEIT, 0); /* Select Fahrenheit */ + bytesread = read(fd, buffer, 8*sizeof(b16_t)); /* Read temperature samples */ + + More complex temperature sensor operations are also available. See the IOCTL + commands enumerated in include/nuttx/sensors/lm75.h. Also read the descriptions + of the tiva_tmp100_initialize() and tiva_tmp100_attach() interfaces in the + arch/board/board.h file (sames as configs/dk-tm4c129x/include/board.h). + DK-TM4129X Configuration Options ================================ |