Circuit for loading FPGA configuration file through serial port

Abstract

The invention relates to a circuit for loading an FPGA configuration file through a serial port inside an active filter product. The circuit comprises a singlechip circuit and an FPGA circuit, wherein the singlechip circuit is electrically connected with the FPGA circuit; the singlechip circuit comprises five resistors including R1, R7, R8, R9 and R10 respectively, a two-digit DIP switch U4, a W25X16 chip U3 and an STM32F103RCT6 chip U1; the FPGA circuit comprises partial pins of an FPGA chip U2, a four-digit DIP switch U5 and 13 resistors including R2, R3, R4, R5, R6, R11, R12, R13, R14, R15, R16, R17 and R18 respectively. The circuit is flexible in programming method and convenient for later maintenance and upgrading of a product.

Description

technical field [0001] The invention relates to a circuit for loading FPGA configuration files into a serial port inside an active filtering product. Background technique [0002] The circuit that loads the FPGA configuration file is an essential part of the active filter product, and it is related to whether the active filter product can operate normally. Currently, the commonly used method of loading FPGA configuration files is to configure the FPGA through the AS interface or JTAG interface of the FPGA, such as figure 1 As shown, it uses the USB Blaster programmer to burn the configuration file from the computer to the external FLASH, and the FPGA loads the configuration file from the external FLASH to the internal RAM of the FPGA. In the process, a dedicated configuration chip for the FPGA is required, and the cost is relatively high. . [0003] Moreover, the current environment where the product is located is relatively strict, and the method of updating the FPGA prog...

AI Technical Summary

Problems solved by technology

Currently, the commonly used method of loading FPGA configuration files is to configure the FPGA through the AS interface or JTAG interface of the FPGA, such as figure 1 As shown, it uses the USB Blaster programmer to burn the configuration file from the computer to the external FLASH, and the FPGA loads the configuration file from the external FLASH to the internal RAM of the FPGA. In the process, a dedicated configuration chip for the FPGA is required, and the cost is relatively high.

[0003] Moreover, the current environment where the product is located is relatively strict, and the method of updating the FPGA program is becoming more and more important to the product. Since the commonly used programming method requires a USB Blaster programmer, it is decided that the programming method cannot be easily expanded, and a program is required. A circuit with more scalable FPGA configuration files, and its programming method is flexible

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