F7133 HIMA 控制系统

F7133 HIMA 控制系统

整个系统工作流程可以简单描述如下：系统上电后，首先DSP由flash实现自举，并运行引导程序，之后转入EDMA等待状态，FPGA初始化后等待外部图像采集命令，收到图像采集命令后开始进行图像采集，并对采集到的图像进行预处理，预处理后的图像经过FIFO缓冲，在存储一定量的数据之后。

FPGA通过半满信号向DSP发送EDMA请求，等待DSP响应，DSP一旦收到来自FPGA的EDMA请求，立即建立EDMA通道，从FIFO中读取数据到L2存储器，存满一帧图像后DSP开始图像压缩，等待一幅图像压缩完成之后，DSP会向FPGA发送中断信号，FPGA在收到中断信号后开始从 FIFO中读取压缩后的图像数据。

一帧数据读完后，判断编码信号是否有效，如果有效则按同样的规则对下一帧图像进行压缩，如果无效则通知DSP结束。

The whole system workflow can be simply described as follows: After the system is powered on, the DSP is bootstrapped by flash first, and the boot program is run, and then it is transferred to the EDMA waiting state. After initialization, the FPGA waits for the external image acquisition command. After receiving the image acquisition command, the image acquisition begins, and the acquired image is preprocessed. After storing a certain amount of data.

FPGA sends EDMA request to DSP through half-full signal and waits for DSP response. Once DSP receives EDMA request from FPGA, it immediately establishes EDMA channel and reads data from FIFO to L2 memory. After storing one frame of image, DSP starts image compression and waits for one image compression to be completed. The DSP sends an interrupt signal to the FPGA, and the FPGA begins to read the compressed image data from the FIFO after receiving the interrupt signal.

After reading a frame of data, the encoded signal is judged whether it is valid. If it is valid, the next frame image is compressed according to the same rules. If it is invalid, the DSP is notified to end.