Home Explore Help
Sign In
RT-Thread-packages
/
esp-idf
mirror of https://github-proxy.rt-thread.io/RT-Thread-packages/esp-idf.git
2
0
Fork 0
Files Issues 0 Wiki
Tree: f9bed53ea2
Branches Tags
esp-idf
/
examples
/
peripherals
/
adc2
Angus Gratton ff2404a272 Merge branch 'master' into feature/cmake 7 years ago
..
main 899fa2dc55 assert: Fix. Move useful functions from wrapped assert functions 7 years ago
CMakeLists.txt 800bffb8b0 cmake: Add CMakeLists.txt files for all examples 7 years ago
Makefile d30f3e7aa8 example(adc2): add example and test case for adc2. 8 years ago
README.md d30f3e7aa8 example(adc2): add example and test case for adc2. 8 years ago

README.md

Example: ADC2

This test code shows how to configure ADC2 and read the voltage connected to GPIO pin.

ADC2 functions:

ADC1_CHANNEL_7: GPIO27, voltage range [0V..3.1V], the data range [0..4095], saturates at about 1.1V.

DAC_CHANNEL_1: GPIO25, output range [0V..3.3V]

Test:

Please choose the channel (GPIO) to output DAC signals and the channel to input signals to ADC by menuconfig:

make menuconfig

Then connect two pins by a wire directly.

E.g. Choose GPIO27 for ADC and GPIO 25 for DAC in menuconfig (default option). Then connect them up.

Connection of ADC and DAC to the same pin is also allowed. In this case, you don't have to connect by a wire externally. E.g. choose GPIO 26 for both ADC and DAC in menuconfig.