Hardware requirements
Mini/micro USB cable
MIMXRT1024-EVK board
Personal Computer
Board settings
Please remove resistance R1882. To make this example work, connections needed to be as follows:
FLEXIO_I2C connected to LPI2C1
SCL J17-4 –> J19-20 SDA J17-2 –> J19-18
Prepare the Demo
Connect a mini USB cable between the PC host and the OpenSDA USB port on the board.
Open a serial terminal on PC for OpenSDA serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, the log would be seen on the OpenSDA terminal like:
FlexIO I2C example read accelerometer value
Found a FXOS8700 on board , the device address is 0x1D.
The accel values:
status_reg = 0xff , x = -50 , y = 11 , z = 2045
status_reg = 0xff , x = -50 , y = 9 , z = 2031
status_reg = 0xff , x = -49 , y = 12 , z = 2032
status_reg = 0xff , x = -50 , y = 6 , z = 2046
status_reg = 0xff , x = -51 , y = 8 , z = 2040
status_reg = 0xff , x = -45 , y = 4 , z = 2032
status_reg = 0xff , x = -52 , y = 13 , z = 2042
status_reg = 0xff , x = -53 , y = 12 , z = 2041
status_reg = 0xff , x = -51 , y = 8 , z = 2048
status_reg = 0xff , x = -52 , y = 9 , z = 2036
End of I2C example .
Note:
if sensor chip(U26) is not welded on the board, the log would be seen on the OpenSDA terminal like:
FlexIO I2C example read accelerometer value
Not a successful i2c communication
End of I2C example .
Note: To debug in qspiflash, following steps are needed:
Select the flash target and compile.
Set the SW8: 1 off 2 off 3 on 4 off, then power on the board and connect USB cable to J23.
Start debugging in IDE.
Keil: Click “Download (F8)” to program the image to qspiflash first then clicking “Start/Stop Debug Session (Ctrl+F5)” to start debugging.