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Diffstat (limited to 'nuttx/configs/stm3210e-eval/README.txt')
| -rwxr-xr-x | nuttx/configs/stm3210e-eval/README.txt | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/nuttx/configs/stm3210e-eval/README.txt b/nuttx/configs/stm3210e-eval/README.txt index 772020e96..b63f7c5f2 100755 --- a/nuttx/configs/stm3210e-eval/README.txt +++ b/nuttx/configs/stm3210e-eval/README.txt @@ -13,6 +13,7 @@ Contents - NuttX buildroot Toolchain - DFU - LEDs + - Temperature Sensor - STM3210E-EVAL-specific Configuration Options - Configurations @@ -237,6 +238,32 @@ They are encoded as follows: on a small proportion of the time. *** LED2 may also flicker normally if signals are processed. +Temperature Sensor +================== + +Support for the on-board LM-75 temperature sensor is available. This supported +has been verified, but has not been included in any of the available the +configurations. To set up the temperature sensor, add the following to the +NuttX configuration file + + CONFIG_I2C=y + 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 = stm32_lm75initialize("/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 IOCTAL +commands enumerated in include/nuttx/sensors/lm75.h. Also read the descriptions +of the stm32_lm75initialize() and stm32_lm75attach() interfaces in the +arch/board/board.h file (sames as configs/stm3210e-eval/include/board.h). + STM3210E-EVAL-specific Configuration Options ============================================ |