[RVB2601 Creative Application Development] 3. RGB three-color breathing light of RVB2601
[Copy link]
This post was last edited by kit7828 on 2022-3-10 14:00
There is a ch2601_rgb_marquee_demo in the routine of Pingtou Ge, which is a demo to realize the three-color marquee effect of RGB LED lamp beads. After decompression, open the project file directly (I can't find the option to open the project file directly in CDK. I don't know if I have to open the workspace first to have this function?)
After opening in CDK, there is still an error display
Still right click on sdk_chip_ch2601 to download related components
Then it will automatically download
You need to wait for a while after downloading, there are a lot of items to install
After the installation is complete, you can compile and download
After downloading is complete
You need to press the RST button on the right side of the development board to run
If the serial port is turned on, you can see debugging information appearing on the serial port
The overall effect is as follows
The code uses GPIO and PWM to control the three-color RGB light.
To further test the PWM effect, I want to change the routine to a three-color breathing light effect.
So, first enable PWM mode in app_config.h
Then modify void led_refresh() in led.c
void led_refresh()
{
csi_error_t ret;
uint32_t g_lux = 0;
//udelay(10);
g_dly ++;
if(g_dly == 60) {
g_dly = 0;
g_ctr++;
if (g_ctr == 3) g_ctr = 0;
if (g_ctr == 0)
{
csi_pwm_out_stop(&r, 2 / 2);
csi_pwm_out_stop(&r, 4 / 2);
}
else if (g_ctr == 1)
{
csi_pwm_out_stop(&r, 7 / 2);
csi_pwm_out_stop(&r, 4 / 2);
}
else //2
{
csi_pwm_out_stop(&r, 7 / 2);
csi_pwm_out_stop(&r, 2 / 2);
}
}
if(g_dly <= 30) g_lux = g_dly;
else g_lux = 60 - g_dly;
if (g_ctr == 0)
{
ret = csi_pwm_out_config(&r, 7 / 2, 30, g_lux, PWM_POLARITY_LOW);
if (ret != CSI_OK) {
printf("===%s, %d\n", __FUNCTION__, __LINE__);
return ;
}
csi_pwm_out_start(&r, 7 / 2);
//csi_pwm_out_stop(&r, 2 / 2);
//csi_pwm_out_stop(&r, 4 / 2);
}
else if (g_ctr == 1)
{
ret = csi_pwm_out_config(&r, 2 / 2, 30, g_lux, PWM_POLARITY_LOW);
if (ret != CSI_OK) {
printf("===%s, %d\n", __FUNCTION__, __LINE__);
return ;
}
csi_pwm_out_start(&r, 2 / 2);
//csi_pwm_out_stop(&r, 7 / 2);
//csi_pwm_out_stop(&r, 4 / 2);
}
else //2
{
ret = csi_pwm_out_config(&r, 4 / 2, 30, g_lux, PWM_POLARITY_LOW);
if (ret != CSI_OK) {
printf("===%s, %d\n", __FUNCTION__, __LINE__);
return ;
}
csi_pwm_out_start(&r, 4 / 2);
//csi_pwm_out_stop(&r, 7 / 2);
//csi_pwm_out_stop(&r, 2 / 2);
}
}
Among them, g_dly is a global variable
In this way, the breathing effect was found to be very poor. After checking, it was found that the delay time in the main loop was too long
If you reduce the delay parameter by 10 times, you can almost see the breathing effect
The finished effect is as follows
The breathing effect of the three-color light is achieved by PWM. Since I am not very familiar with the PWM control method of the Pingtouge chip, it is currently achieved by constantly adjusting the configuration function csi_pwm_out_config, rather than directly modifying the register method, so the overall effect is not perfect. I hope to learn more about this chip in the future and achieve more perfect control.
| 
提升卡
变色卡
千斤顶
京公网安备 11010802033920号
