I connected the PCM1860 ADC in this manner. I expect data on my oscilloscope on the digital output (pin 18). I have so far only seen square wave on the clock pins but nothing on the data pin. Is this connected ok?
Related
If i want to use mpu6050 intterrupt to wake up stm32.
when i move my board,stm32 can wake up form stop mode.
i have realized the iic communication between stm32 and mpu6050.and stm32 can already enter stop mode.
I need to reactivate a sensor before any communication. The device has its own pull up resistor and I have to set the nWAKE pin to 0, after the communication I have to leave the pin high. I used the ODR register to set the nWAKE pin to 0, but how can I release that pin after communication?
Using st7789 tearing pin interrupt for synchronization of lcd display. But getting interrupt at very high rate hence all other tasks are getting delayed. Help me in configuration of tearing pin interrupt at lower rate so other task will get MCU time and get executed.
Using stm32l4 with st7789 driver to drive TFT LCD display.
i try to connect lcd with touch panel AR1100 to Raspberry pi3 with Android things. Android does not have driver for this touch, i found this solve:
create file:
/system/usr/idc/Vendor_04d8_Product_0c03.idc
and write:
# This is an example of an input device configuration file.
# It might be used to describe the characteristics of a built-in touch screen.
# The device is a external device.
device.internal = 0
# The device should behave as a touch screen device.
touch.deviceType = touchScreen
# The device uses the same orientation as the built-in display.
touch.orientationAware = 1
But after restart touch not working. What wrong??
How i can connect this touch to android things?
In your Android Things application (not on Android Things system level) you can add AR1100 touch support via Raspberry Pi UART by implementing AR1100 Data Protocol (pp. 14-15 of datasheet):
The host should be configured for 9600 BAUD, 8 data bits and 1 Stop
bit.
...
Touch reports always originate from the AR1100 and are
transmitted in response to touch detection. The format of the
touch report is mode-dependent. The measurement resolution for
touch coordinates is 10-bit. The measured values are shifted
(multiplied by 4) and reported in a 12-bit format. In the
reporting protocol, the Least Significant coordinate bits X1:X0
and Y1:Y0 will be zeros. The resulting full-scale range for reported
touch coordinates is 0 to 4095.
...
The ‘standard’, 5-byte touch report is formatted as in Table 4-2:
etc.
Android Things UART example you can find here.
I am trying to use the RPI 3's hardware PWM pin.
Is there a simple Bash script or C program that activates and controls the PWM pin?
WiringPi has written a GPIO utility for testing against the Raspberry GPIO pins. It includes PWM functionallity. Check it out on http://wiringpi.com/the-gpio-utility/