What does ov7670 module wrst mean
Author:Hu Xiaoyu Time:2021-07-20 13:31 Browse(826)
Ov7670 sensor: CMOS device; Standard SCCB interface, compatible with IIC interface; Built in photosensitive array, timing generator, AD converter, analog signal processing, digital signal processor
. Ov7670 sensor: CMOS device; Standard SCCB interface, compatible with IIC interface; Built in photosensitive array, timing generator, AD converter, analog signal processing, digital signal processor. General working process: the light irradiates the photosensitive array to generate the corresponding charge, transmits it to the corresponding analog signal processing unit, converts it into digital signal by ad, and interpolates it into RGB signal by digital signal processor,. For this module. 1. How to store image data; 2. How to read image data. 1. Storage (ov7670 writes data to FIFO). The process of ov7670 module to store image data is: waiting for ov767 synchronization signal> FIFO write pointer reset> FIFO write enable> waiting for the second synchronization signal> FIFO write disable. Through the above five steps, an image can be stored. 2. Read (MCU reads data from FIFO). Read process: FIFO read pointer reset, FIFO read clock (FIFO rCLK) -> read the first pixel high byte, FIFO read clock (FIFO rCLK) -> read the first pixel low byte, FIFO read clock (FIFO rCLK) -> read the second pixel high byte, cycle read the remaining pixels, end. For example, in QVGA mode and rgb565 format, we can read 320 * 240 * 2 times in a total cycle, and then we can read a frame of data. After writing these data into the LCD module, we can see the picture of the camera..
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