【CH579M-R1】+KEY control LED program

jinglixixi

【CH579M-R1】+KEY control LED program [Copy link]

 

 

In the post about PWM breathing lights, it was said that none of the PWM outputs are connected to LEDs, which is true. But it does not necessarily require an external LED module, why?

Because there is actually an LED available on the development board, as shown in Figure 1, but I looked through the schematic diagram and couldn't find out what the LED was connected to. At first I thought it was careless and the mark was forgotten. So I scanned it with a multimeter, but still found nothing. It was then that I suddenly realized: it turned out that the LED was indeed not connected to anywhere!

This makes it much more convenient to use, and you can connect wherever you need it!

The test of the PWM breathing light can be solved with just one wire. Of course, if you don’t want to connect the wires, you can find the nearest PB18 or PB19 and use a short connector to do it.

Figure 1 Schematic diagram

When running the following program, 4 LED lights can be turned on at once, and the effect is shown in Figure 2.

int main()
{
 GPIOB_ModeCfg( GPIO_Pin_18, GPIO_ModeOut_PP_5mA );
 GPIOB_ModeCfg( GPIO_Pin_19, GPIO_ModeOut_PP_5mA );
 GPIOB_ModeCfg( GPIO_Pin_4, GPIO_ModeOut_PP_5mA );
GPIOB_ModeCfg( GPIO_Pin_7, GPIO_ModeOut_PP_5mA );
 while(1)
{
GPIOB_SetBits( GPIO_Pin_18 );
  GPIOB_SetBits( GPIO_Pin_19 );
GPIOB_SetBits( GPIO_Pin_4 );
GPIOB_SetBits( GPIO_Pin_7 );
       mDelaymS( 500 );
       GPIOB_ResetBits( GPIO_Pin_18 );
GPIOB_ResetBits( GPIO_Pin_19 );
GPIOB_ResetBits( GPIO_Pin_4 );
GPIOB_ResetBits( GPIO_Pin_7 );
mDelaymS( 500 );
 }
}

Figure 2 LED light test results

There are two buttons on the development board, one is the reset button and the other is the download button. In order to save trouble, it is better not to use these two buttons for programming. For this reason, an ultra-thin soft button is used here for KEY testing.

The test program is as follows, one key controls one LED.

int main()
{
      GPIOB_ModeCfg( GPIO_Pin_18, GPIO_ModeOut_PP_5mA );
      GPIOB_ModeCfg( GPIO_Pin_19, GPIO_ModeOut_PP_5mA );
      GPIOB_ModeCfg( GPIO_Pin_4, GPIO_ModeOut_PP_5mA );
  GPIOB_ModeCfg( GPIO_Pin_7, GPIO_ModeOut_PP_5mA );
 
  GPIOB_ModeCfg( GPIO_Pin_8, GPIO_ModeIN_PU );
  GPIOB_ModeCfg( GPIO_Pin_16, GPIO_ModeIN_PU );
  GPIOA_ModeCfg( GPIO_Pin_7, GPIO_ModeIN_PU );
  GPIOA_ModeCfg( GPIO_Pin_9, GPIO_ModeIN_PU );

  while(1)
{
  if(GPIOB_ReadPortPin(GPIO_Pin_8)) GPIOB_SetBits( GPIO_Pin_18 );
 else GPIOB_ResetBits( GPIO_Pin_18 );

  if(GPIOB_ReadPortPin(GPIO_Pin_16)) GPIOB_SetBits( GPIO_Pin_19 );
 else GPIOB_ResetBits( GPIO_Pin_19 );

  if(GPIOA_ReadPortPin(GPIO_Pin_7)) GPIOB_SetBits( GPIO_Pin_4 );
 else GPIOB_ResetBits( GPIO_Pin_4 );

if(GPIOA_ReadPortPin(GPIO_Pin_9)) GPIOB_SetBits( GPIO_Pin_7 );
 else GPIOB_ResetBits( GPIO_Pin_7 );
     }
}

Figure 3 KEY test results

okhxyyo

Qinheng CH579M-R1 Development Board Review

Summary post: https://en.eeworld.com/bbs/thread-1140005-1-1.html

okhxyyo

That's really good. Is this LED drawn in the schematic?

freebsder

Is this small keyboard included with the board?

jinglixixi

freebsder posted on 2020-9-8 16:05 Is this small keyboard shipped with the board?

No, it is left over from previous projects. It doesn’t take up space and is more convenient to use.

jinglixixi

okhxyyo posted on 2020-9-8 15:51 It's really good. Is this LED drawn in the schematic?

These are LED1 and LED2 in Figure 1.

败絮呢

Worth learning

jinglixixi

Baixu posted on 2020-9-9 10:07 Worth learning

Thanks for your support

damiaa

Nice little keyboard.

hujj

okhxyyo posted on 2020-9-8 15:51 It's really good. Is this LED drawn in the schematic?

Yes, the two LEDs marked yellow and green are them.

okhxyyo

hujj posted on 2020-9-9 19:40 Yes, the two LEDs marked yellow and green are them.

This approach is really thoughtful.