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Altera_Forum
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10 years ago

Cyclone V HPS can’t read RS232 data

I can send RS232 data via HPS UART1 but unable to read data. The scope shows RS232 data on RX pin but test code can’t read any data from /dev/ttyS1 and nothing when I ‘cat /dev/ttyS1’ I can th...
Altera_Forum's avatar
Altera_Forum
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10 years ago

Thanks, I did implement rts, cts, dcd, and ri but still same behavior. No rx data coming in from serial driver

root@cyclone5:~# cat /proc/tty/driver/serial

serinfo:1.0 driver revision:

0: uart:16550A mmio:0xFFC02000 irq:194 tx:22516 rx:274 RTS|DTR

1: uart:16550A mmio:0xFFC03000 irq:195 tx:15 rx:0 RTS|DTR|RI