[ARM] Program for a STM32F4 board in CoIDE

[victorrr]

Hello, i want to program a STM32F4 board in CoIDE so it can transmit a voltage to a pin and then stop for a while and then again transmit voltage to the pin. I want to program the board so it can send periodically voltage to a ultrasound transducer. It has to do something like this:

https://upload.wikimedia.org/wikipe...ycle_general.png/350px-Duty_cycle_general.png

Can someone help me please? I have programmed easy things like turning on the leds but i'm stuck for doing this.

Thank you very much

 

[milan.rajik]

That is LED blinking. You want to control the power to Ultrasonic sensor module or what to send trigger pulse ? If you want to control the power to module then you have to use a relay, transistor or mosfer controlled by MCU.

 

[victorrr]

well i want to connect the board to ultrasonic sensor throug a h-bridge ic. The idea is that it arrives to the ultrasonic sensor a periodically wave (the h-bridge is only for doing this wave positive or negative). The thing is that I need to program the board so it can make this "wave" periodically into a pin and connect that pin to the sensor.