Infrared scanning control method and circuit and electronic device
A technology of infrared scanning and control method, which is applied to the input/output process of electrical digital data processing, instruments, and data processing, etc., can solve the problems of waste of MCU resources, slow scanning frame rate, etc., and save the time of delay and waiting. , Improve the scanning frame rate and save the effect of resource consumption
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0028] see image 3 , image 3 It is a flow chart of an infrared scanning control method provided by an embodiment of the present invention; including:
[0029] S1. When responding to the start command, the timer starts scanning, and triggers the infrared transmitting and receiving circuit to start working with an output control signal;
[0030] S2. The timer sends an enable signal to the ADC module when scanning, so that the ADC module starts sampling data;
[0031] S3. Send the sampling data of the ADC module.
[0032] Wherein, the timer and the ADC module are integrated in one MCU, and the MCU may be an MCU of STM32 series or GD series, such as: STM32F1xx, STM32F3xx, STM32F4xx, STM32H7xx of STM32 series, GD405 of GD series, etc.
[0033] Preferably, when responding to the initialization command, it is necessary to configure the timing of the PWM channel in the timer, and this step is only performed once when the system is initialized. The MCU includes several timers, se...
Embodiment 2
[0040] see Figure 5 , Figure 5 It is a structural block diagram of an infrared scanning control circuit 10 provided by an embodiment of the present invention; the infrared scanning control circuit 10 includes an infrared transmitting and receiving circuit 11 and an MCU12; wherein, the MCU12 executes the infrared scanning described in the first embodiment above In the control method, the MCU 12 includes a timer 121 , an ADC module 122 and a DMA controller 123 .
[0041] Specifically, when the timer 121 responds to the start command, it starts to output the PWM waveform to generate the required control sequence to control the scanning, and triggers the infrared transmitting and receiving circuit 11 to start working by outputting a control signal. In this process, the entire scanning process basically does not require the intervention of the MCU12 (the GPIO port of the MCU12 is not required to realize control), so that the resources of the MCU12 can be used to organize and sen...
Embodiment 3
[0046] see Figure 6 , Figure 6 It is a structural block diagram of an electronic device 20 provided by an embodiment of the present invention; the electronic device 20 includes a main circuit 21 and the infrared scanning control circuit 10 described in the above embodiment; wherein, the infrared scanning control circuit 10 combines the The sampling data of the ADC module is sent to the main circuit 21, so that the main circuit 21 locates the position of the touching object according to the sampling data.
[0047] Preferably, the electronic device 20 further includes a touch screen, and the touch screen is used for receiving a touch signal of the touch object. For the specific working process of the infrared scanning control circuit 10 , please refer to the working process of the infrared scanning control circuit 10 in the second embodiment, which will not be repeated here.
[0048] Compared with the prior art, the electronic device 20 disclosed in the present invention sol...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More