57.2. SEI Master: Connect ENDAT Encoder
57.2.1. Overview
This demo shows SEI interface read Endat encoder position data and automatically calculate sampling/update delay time, then print related information by uart console.
57.2.2. Configration
Two development boards are required, one as the master and one as the slave.
Slave sample path is “samples/drivers/sei/slave/endat”, master is this example.
Master’s SEI_CLK pins should bridging master side，and slave’s SEI_CLK pins should bridging slave side.
Connect master’s SEI pins DATA_P/DATA_N to slave’s SEI pins DATA_P/DATA_N.
Connect master’s SEI pins CLKO_P/CLKO_N to slave’s SEI pins CLKI_P/CLKI_N.
Connect master’s GND to slave’s GND.
57.2.3. Running the example
When the example runs successfully, the console shows the following log. ST’s value increasing by 1 each sample.
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$$\ $$\ $$$$$$$\ $$\ $$\ $$\
$$ | $$ |$$ __$$\ $$$\ $$$ |\__|
$$ | $$ |$$ | $$ |$$$$\ $$$$ |$$\ $$$$$$$\ $$$$$$\ $$$$$$\
$$$$$$$$ |$$$$$$$ |$$\$$\$$ $$ |$$ |$$ _____|$$ __$$\ $$ __$$\
$$ __$$ |$$ ____/ $$ \$$$ $$ |$$ |$$ / $$ | \__|$$ / $$ |
$$ | $$ |$$ | $$ |\$ /$$ |$$ |$$ | $$ | $$ | $$ |
$$ | $$ |$$ | $$ | \_/ $$ |$$ |\$$$$$$$\ $$ | \$$$$$$ |
\__| \__|\__| \__| \__|\__| \_______|\__| \______/
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SEI master EnDat sample
Started sei engine!
E:0, ST:0xa5a5, CRC:0x5, sample_tm:2465400001, update_tm:2465409502, TimeDelay:475*0.1us
E:0, ST:0xa5a6, CRC:0xf, sample_tm:2505400001, update_tm:2505409502, TimeDelay:475*0.1us
E:0, ST:0xa5a7, CRC:0x1a, sample_tm:2545400001, update_tm:2545409502, TimeDelay:475*0.1us
E:0, ST:0xa5a8, CRC:0x7, sample_tm:2585400001, update_tm:2585409502, TimeDelay:475*0.1us
E:0, ST:0xa5a9, CRC:0x12, sample_tm:2625400001, update_tm:2625409502, TimeDelay:475*0.1us
E:0, ST:0xa5aa, CRC:0x18, sample_tm:2665400001, update_tm:2665409502, TimeDelay:475*0.1us