[AB32VG1 Development Board Review] Button Control LED and Fan

jinglixixi

[AB32VG1 Development Board Review] Button Control LED and Fan [Copy link]

 

The AB32VG1 development board is equipped with LED and KEY, and its schematic diagram is shown in Figure 1.

Figure 1 LED and KEY circuit connection

The procedure to control LED with KEY is as follows:

int main(void)
{
 uint32_t cnt = 0;
 uint8_t pin = rt_pin_get("PE.1");
 rt_pin_mode(pin, PIN_MODE_OUTPUT);
 uint8_t pin1 = rt_pin_get("PE.4");
 rt_pin_mode(pin1, PIN_MODE_OUTPUT);
 uint8_t pin2 = rt_pin_get("PA.1");
 rt_pin_mode(pin2, PIN_MODE_OUTPUT);
 uint8_t S2 = rt_pin_get("PF.1");
 rt_pin_mode(S2, PIN_MODE_INPUT_PULLUP );
 uint8_t S3 = rt_pin_get("PF.0");
 rt_pin_mode(S3, PIN_MODE_INPUT_PULLUP );
 uint8_t S4 = rt_pin_get("PA.2");
 rt_pin_mode(S4, PIN_MODE_INPUT_PULLUP );
 rt_pin_write(pin, PIN_HIGH);
 rt_pin_write(pin1, PIN_HIGH);
 rt_pin_write(pin2, PIN_HIGH);
 while (1)
 {
 if(rt_pin_read(S2)==PIN_LOW) {
 rt_pin_write(pin, PIN_LOW);
 } else {
 rt_pin_write(pin, PIN_HIGH);
 }
 if(rt_pin_read(S3)==PIN_LOW) {
 rt_pin_write(pin1, PIN_LOW);
 } else {
 rt_pin_write(pin1, PIN_HIGH);
 }
 if(rt_pin_read(S4)==PIN_LOW) {
 rt_pin_write(pin2, PIN_LOW);
 } else {
 rt_pin_write(pin2, PIN_HIGH);
 }
 }
}

The function of this program is to use buttons S2~S4 to control the on and off of LED_R, LED_G and LED_B respectively.

The development board is equipped with an Arduino interface, which can be used to control the external LED module. When the control pin is connected to PA0, the control program is as follows:

#include <rtthread.h>
#include "board.h"
int main(void)
{
 uint32_t cnt = 0;
 uint8_t pin0 = rt_pin_get("PA.0");
 rt_pin_mode(pin0, PIN_MODE_OUTPUT);
 while (1)
 {
 if (cnt % 2 == 0) {
 rt_pin_write(pin0, PIN_LOW);
 } else {
 rt_pin_write(pin0, PIN_HIGH);
 }
 cnt++;
 rt_thread_mdelay(500);
 }
 return 0;
}

Figure 2 Driving LED module

In addition, if the LED module is replaced with a fan module, the operation of the fan can be controlled, and the fan speed can be adjusted by the delay value.

Figure 3 Driving fan module

littleshrimp

Below is the duty cycle of I/O analog PWM adjusted by delay?

littleshrimp

littleshrimp posted on 2021-8-21 08:07 The following is how to adjust the duty cycle of I/O analog PWM through delay?

I misread it. It seems that the frequency is adjusted by delay.

jinglixixi

littleshrimp posted on 2021-8-21 08:07 Below is how to adjust the duty cycle of I/O analog PWM through delay?

Similar reasoning

OS001

To learn more about smart hardware related products, please click: [Huawei Developer Alliance Ecosystem Market Smart Hardware Zone https://developer.huawei.com/consumer/cn/market/prod-list?categoryIdL1=7e857be8d4b24a7e97ddf5d941b38ca1&ha_source=mkt-thirdforum]

freebsder

It seems that the OP bought a lot of modules.

jinglixixi

freebsder posted on 2021-8-23 17:13 It seems that the OP bought a lot of modules

Ha ha!

aozima

By lowering the duty cycle, the glare is finally gone!

470R resistor, the light is too bright