AM5748: How to add Hardware flow control in SYS/BIOS UART example for AM57xx.

Phaneesh A

Part Number: AM5748

Tool/software:

Hi ,

We are trying to enable HW flow control in AM5748 UART SYS/BIOS example , when I checked uartParams structure in UART.h driver include file, there we need to define a Macro to enable the HW flow control.

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#ifdef PRU_ICSS_FW // PRU UART FW only, currently unsupported by HW IP driver
UART_FC_TYPE flowControlType; /*!< Flow Control type */
uint8_t hwFlowControlThr; /*!< Hardware flow Control threshold, 0-0x100 */
#endif

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We have copied the UART.h and UART_drv.c file locally in our project and enabled this PRU_ICSS_FW macro, still when we observed the the signals in scope there is no activity in RTS and CTS, it's working like a Normal UART.

So, we need your support regarding enabling the HW flow control.

Thanks ,

Phaneesh A

over 1 year ago

0 Josue Zamitiz-Ayala over 1 year ago

TI__Mastermind 31524 points

Hello Phaneesh,

Unfortunately this functionality is not supported as part of our SDK offering but it seems like it is doable:

See this thread:https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1112898/am5726-processor-sdk-am572x-uart-hardware-flow-control-driver-support-in-ti-rtos

Keep in mind that since its not supported in our sdk, we have very little to no technical support for it since it has not been validated by the SDK.

Best,

Josue

0 Phaneesh A over 1 year ago in reply to Josue Zamitiz-Ayala

Prodigy 210 points

Hi Josue,

I've already gone through this link and I've tried adding this UARTAutoRTSAutoCTSControl after UART_open it didn't work , may I know where exactly I need to add this.

Thanks

Phaneesh A

0 Josue Zamitiz-Ayala over 1 year ago in reply to Phaneesh A

TI__Mastermind 31524 points

Phaneesh,

I suggest you reach out to the engineer that enabled it on his own. As I mentioned before, this is not supported by our SDK therefore its implementation is the responsibility of the customer. Based on the TRM entry 25.3.4.8.1.3.2 Hardware Flow Control, perhaps you have to add before UART_open?

Best,

Josue

0 Phaneesh A over 1 year ago in reply to Josue Zamitiz-Ayala

Prodigy 210 points

Hi Josue ,

Thanks for the response , I'll check and update .

Thanks ,

Phaneesh A Kashyap

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AM5748: How to add Hardware flow control in SYS/BIOS UART example for AM57xx.