New ContributorSetting up UART interface between DE10_Nano and PC without HPS or NIOS II
I want to setup the UART interface between DE10-standard board and the PC. From various articles available online, let me first brief the available options:-
Method 1: Using HPS_UART_RX and HPS_UART_TX pins and the onboard FT232R chip by using HPS.
Reference : https://fpgacloud.intel.com/devstore/platform/16.1.0/Standard/uart-rs-232-maximum-baud-rate-reference-design/
I don't want to go with this method since I prefer to write a Verilog UART code on FPGA to setup the interface without having to instantiate NIOS-II or HPS.
Method 2: To use an external FT232R chip, use 2 GPIO pins as UART Tx and Rx and use it in the Verilog code written in FPGA. This method looks okay to me. But want to
confirm that I will not be able to use either onboard FT232R chip or HPS_UART_RX/TX pins.
Method 3: I saw one more post which says about using HPS_UART_RX and HPS_UART_TX as loan IOs but do not say anything about if we could also use onboard FT232R chip without HPS here.
Reference: https://community.intel.com/t5/Programmable-Devices/How-to-let-FPGA-get-access-to-HPS-pins/td-p/107740
Will this method serve my requirement without having to use an external chip or GPIOs? If yes, can you please detail me the steps?
Hi,
as stated, method 2 can't use onboard FT232 chip, method 3 can use it, but you need to configure HPS registers to setup the h2f loan_io routing. Means you need to write HPS code, compile and load it.Regards
Frank
