We use 4 GPU GPIO to download the FPGA firmware on customer carried board. About the FPGA download , we use the same mode with a TX2 customer carried board. Download time:(the same Firmware file) 1） TX2 : about 120 seconds; 2） ORIN NX : about 370 seconds; How to reduce the download time on ORIN NX; Thanks

Sorry, it’s hard for us to analyze the difference between Orin NX and TX2. They are from different series and also the Jetpack release. We don’t have the Xilinx FPGA and even your custom board. What we could do now is providing the method to increase GPIO clock because you are using GPIO for FPGA firmware download. Do you have any reproduce steps on the devkit and we could do further check?

TX2_serial_log.txt (27.1 KB) ORIN_NX.txt (87.2 KB) [image] Hi, we use GPU GPIO to Timing Simulation FPGA DOWNLOAD

[image] wangqunpj: TX2_serial_log.txt (27.1 KB) ORIN_NX.txt (87.2 KB) Sorry, I don’t see any message about downloading FPGA firmware. There’s only the boot up logs. Please run your application with timestamp to download FPGA firmware. [image] wangqunpj: GPU GPIO May I know what is “GPU GPIO”? What is the interface you used to communicate with FPGA?

[f836b4dfd9ccb685dd27adfd1e7ad7d] [image] [image] This four GPIO are used to load FPGA firmware.

How did you configure PIN128 (GPIO05) to as serial_out? Isn’t it configured as GPIO instead of serial? Please provide the serial console log to check if there’s any error or delay during downloading.

我来用中文描述一下问题我们用ORIN NX来加载XILINX FPGA的固件（也就是.bit），也就是Slave Serial mode，上面有图示给出了加载的时序图；我们使用了ORIN NX的4个GPIO来模拟上述的时序，GPIO02–INIT，GPIO03–PROG，GPIO04–CCLK，GPIO05–DIN; 例如： GPIO05是数据线，用于传输FPGA固件的每一位bit,根据时序要求，每一个时钟上升沿，就传输1个bit.这个GPIO05只做普通GPIO使用；例如： GPIO04用于产生时钟，即这个GPIO先拉低，隔一个固定时间，再拉高保持一个固定时间。如此循环即产生了需要的时钟。.这个GPIO04只做普通GPIO使用；我们已经通过这种方式在ORIN NX自研载板上成功加载了FPGA，使用同样的加载方式在TX2的自研载板上也成功加载了FPGA，但我们发现，ORIN NX用时会比TX2多200多秒，我们不确定是什么原因导致了ORINNX加载时间变长。因为我们是用GPIO加载的，所以没有系统相关的log文件打印输出

for example while(1) { SET_GPIO04(0); SET_GPIO04(1); } when runing code above on ORIN NX,we can find the square wave about 110khz through the oscilloscope. question: How to increase GPIO frequency,then get a higher square wave frequency?

[image] wangqunpj: 因为我们是用GPIO加载的，所以没有系统相关的log文件打印输出若無相關log會較難debug問題點請問是否有透過示波器比較過data/clock rate在TX2及OrinNX的差異? [image] wangqunpj: when runing code above on ORIN NX,we can find the square wave about 110khz through the oscilloscope. Have you tried if TX2 generate the same 110kHz with this approach? [image] wangqunpj: How to increase GPIO frequency,then get a higher square wave frequency? Let me check with our internal.

the value we got from TX2 is about 400KHz below is we search in forum [image] [image] GPIO Bit-Bang Speed Increase Jetson TX2 Hey Akmal.ali Yeah i actually referenced your thread for help on memory mapping the pins (so thank you). So i’ve also made sure my pointers are volatile and everything. My actual loop and code (sans the memory mapping part of course) was actually originally written for a very old ti davinci processor and it was performing much faster. That and given your experience with the speed of the TX1 running the same code indicates to me that the code should be fine and its something specific with the…

[image] wangqunpj: the value we got from TX2 is about 400KHz So, The difference between TX2 and OrinNX seems caused from the clock rate of GPIO. The clock rate for GPIO could be configured with the following node. #cat /sys/kernel/debug/bpmp/debug/clk/axi_cbb/rate It seems been configured as the same as max_rate at 204MHz for Orin NX already.

please see this pdf: Orin-TRM_DP10508002v1.1p.pdf – 8.5.5.2.1 Bit Banging Use Cases [image]

How to config GPIO clock freq?

Robotics & Edge Computing Jetson Systems Jetson Orin NX

wangqunpj July 6, 2023, 3:18am 11

the value we got from TX2 is about 400KHz
below is we search in forum

Topic		Replies	Views
Change GPIO AON clock speed Jetson Orin NX gpio , board-design	9	851	January 11, 2024
Orin NX pin 91(SPI0 SCK) and pin104(SPI1 MOSI) GPIO function out of control Jetson Orin NX spi , gpio	14	400	March 17, 2025
How to modify GPIO's toggle speed Jetson Orin NX gpio	11	1256	July 21, 2023
GPIO Bit-Bang Speed Increase Jetson TX2 nvbugs	24	4657	June 4, 2019
GPIO pins issue Jetson Orin NX gpio	9	1168	March 19, 2024
How to configure clock frequency by editing .dts files? Jetson Orin Nano boot , reflash , kernel , device-tree	8	388	September 5, 2024
Bitbanging gpio lines on TX2 Jetson TX2	7	1532	September 25, 2018
GPIO signal rate Jetson AGX Orin gpio	9	616	August 4, 2024
Orin spi transfer interval 20ms Jetson AGX Orin spi	6	1045	July 27, 2023
Jetson AGX Orin Output the clock to the GPIO pin Jetson AGX Orin gpio , board-design	3	568	November 15, 2023

How to config GPIO clock freq?

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