AVR单片机Atxmega128A3U点亮SK6812RGBW灯带显示程序

只看该作者 · 2023-2-16 09:30

AVR单片机Atxmega128A3U点亮SK6812RGBW灯带显示程序1、灯带数据格式和数位循序

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2、LED码定义和时序

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数据传输时间

时序表名称		Min.	实际值	Max.	单位
T	码元时间	1.2	--	--	us
T0H	0码，高电平时间	0.2	0.32	0.4	us
T0L	0码，低电平时间	0.8	--	--	us
T1H	1码，高电平时间	0.58	0.64	1.0	us
T1L	1码，低电平时间	0.2	--	--	us
Reset	复位码，低电平时间	>80	--	--	us

（1）协议采用单极性归零码，每个码元必须有低电平，本协议的每个码元起始为高电平，高电平时间宽度决定是“0”码还是“1”码；

（2）书写程序时，码元周期最低要求为1.2us;

（3）“0”码和“1”码的高电平时间按照上表的规定范围，“0”码和“1”码的低电平时间要求小于20us。

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3、文件ledstrap.h

灯带输入信号引脚为PORTF.2

#ifndef _LEDSTRAP_H_

#define _LEDSTRAP_H_

//灯带输出引脚控制

#define LED_DO_HIGH (PORTF.OUTSET=0b00000100) //灯带数据引脚输出高电平 PF2

#define LED_DO_LOW (PORTF.OUTCLR=0b00000100) //灯带数据引脚输出低电平

#define _nop_() #asm("NOP")

#define COLOR_NUM 9 //显示9种颜色

#define LIGHT_NUM 20 //可以亮20个灯。

typedef struct color

{

unsigned char red;

unsigned char green;

unsigned char blue;

unsigned char white;

} COLOR; //32位RGBW颜色结构

void ledstrap_reset(); //灯带复位

//发送数据顺序: g7g6g5g4g3g2g1g0r7r6r5r4r3r2r1r0b7b6b5b4b3b2b1b0

void send_data(unsigned char r, unsigned char g, unsigned char b,unsigned char w);

#endif

4、文件ledstrap.c

#include "xmega128a3u.h"

#include "general.h"

#include "ledstrap.h"

//”0”码输出函数

void code0() {

LED_DO_HIGH;

_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();

LED_DO_LOW;

_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();

}

//“1”码输出函数

void code1() {

LED_DO_HIGH;

_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();

LED_DO_LOW;

_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();

//_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();

}

#define CODE0 code0();

#define CODE1 code1();

//>80μs

void ledstrap_reset()

{

unsigned int i;

LED_DO_LOW;//Din = 0;

for(i=0;i<80;i++) {

_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();

_nop_();_nop_();_nop_();_nop_();_nop_();

}

//发送数据顺序:

//g7g6g5g4g3g2g1g0r7r6r5r4r3r2r1r0b7b6b5b4b3b2b1b0w7w6w5w4w3w2w1w0

void send_data(unsigned char r,unsigned char g,unsigned char b,unsigned char w)

{

unsigned char a;

for(a=0;a<8;a++)

{

if(g&0x80)

CODE1

else

CODE0

g<<=1;

}

for(a=8;a<16;a++)

{

if(r&0x80)

CODE1

else

CODE0

r<<=1;

}

for(a=16;a<24;a++)

{

if(b&0x80)

CODE1

else

CODE0

b<<=1;

}

for(a=24;a<32;a++)

{

if(w&0x80)

CODE1

else

CODE0

w<<=1;

}

5、演示函数

AVR开发工具是：CodeVision3.12，初始化部分利用向导工具实现。

注意：本程序系统时钟是32MHz, Atxmega128A3U的PORTF的引脚2设置成输出，主程序如下：

#include "delay.h"

#include "ledstrap.h"

// 定义几组颜色

COLOR rainbow[] = {

{0xFF, 0x00, 0x00,0x00}, // red

{0x00, 0xFF, 0x00,0x00}, //green

{0x00, 0x00, 0xFF,0x00}, //blue

{10,108,169,0}, //青蓝色

{0xFF, 0xFF, 0x00,0x00}, // yellow

{0xFF, 0x00, 0xFF,0x00}, // violet

{0, 0, 0xFF,0x7F}, // indigo

{0x8B, 0, 0xFF,0x00}, // oringe

{0, 0, 0,0}, // off

};

//下面是系统时钟初始化程序，采用外部16M晶振，通过锁相环2倍频输出32MHz时钟

// System Clocks initialization

void system_clocks_init(void)

{

unsigned char n,s;

// Optimize for speed

#pragma optsize-

// Save interrupts enabled/disabled state

s=SREG;

// Disable interrupts

#asm("cli")

// External 16000.000 kHz oscillator initialization

// Crystal oscillator increased drive current: Off

// External Clock Source - Startup Time: 0.4-16 MHz Quartz Crystal - 16k CLK

OSC.XOSCCTRL=OSC_FRQRANGE_12TO16_gc | OSC_XOSCSEL_XTAL_16KCLK_gc;

// Enable the external oscillator/clock source

OSC.CTRL|=OSC_XOSCEN_bm;

// Wait for the external oscillator to stabilize

while ((OSC.STATUS & OSC_XOSCRDY_bm)==0);

// PLL initialization

// PLL clock source: External Osc. or Clock

// PLL multiplication factor: 2

// PLL output/2: Off

// PLL frequency: 32.000000 MHz

// Set the PLL clock source and multiplication factor

n=(OSC.PLLCTRL & (~(OSC_PLLSRC_gm | OSC_PLLDIV_bm | OSC_PLLFAC_gm))) |

OSC_PLLSRC_XOSC_gc | (0<<OSC_PLLDIV_bp) | 2;

CCP=CCP_IOREG_gc;

OSC.PLLCTRL=n;

// Enable the PLL

OSC.CTRL|=OSC_PLLEN_bm;

// System Clock prescaler A division factor: 1

// System Clock prescalers B & C division factors: B:1, C:1

// ClkPer4: 32000.000 kHz

// ClkPer2: 32000.000 kHz

// ClkPer: 32000.000 kHz

// ClkCPU: 32000.000 kHz

n=(CLK.PSCTRL & (~(CLK_PSADIV_gm | CLK_PSBCDIV1_bm | CLK_PSBCDIV0_bm))) |

CLK_PSADIV_1_gc | CLK_PSBCDIV_1_1_gc;

CCP=CCP_IOREG_gc;

CLK.PSCTRL=n;

// Wait for the PLL to stabilize

while ((OSC.STATUS & OSC_PLLRDY_bm)==0);

// Select the system clock source: Phase Locked Loop

n=(CLK.CTRL & (~CLK_SCLKSEL_gm)) | CLK_SCLKSEL_PLL_gc;

CCP=CCP_IOREG_gc;

CLK.CTRL=n;

// Disable the unused oscillators: 2 MHz, 32 MHz, internal 32 kHz

OSC.CTRL&= ~(OSC_RC2MEN_bm | OSC_RC32MEN_bm | OSC_RC32KEN_bm);

// Lock the CLK.CTRL and CLK.PSCTRL registers

n=CLK.LOCK | CLK_LOCK_bm;

CCP=CCP_IOREG_gc;

CLK.LOCK=n;

// ClkPer output disabled

PORTCFG.CLKEVOUT&= ~(PORTCFG_CLKOUTSEL_gm | PORTCFG_CLKOUT_gm);

// PLL fault detection: Off

// External clock source failure detection: On

n=(OSC.XOSCFAIL & (~(OSC_PLLFDEN_bm | OSC_XOSCFDEN_bm))) | OSC_XOSCFDEN_bm;

CCP=CCP_IOREG_gc;

OSC.XOSCFAIL=n;

// Restore interrupts enabled/disabled state

SREG=s;

// Restore optimization for size if needed

#pragma optsize_default

}

// Oscillator failure non-maskable interrupt

interrupt [OSC_OSCF_vect] void oscillator_failure_isr(void)

{

if (OSC.XOSCFAIL & OSC_XOSCFDIF_bm)

{

// External clock source failure detected

// Clear the failure detection interrupt flag

OSC.XOSCFAIL|=OSC_XOSCFDIF_bm;

// Write your code here

}

// 下面是初始化端口,只列出PORTF的初始化部分

void ports_init(void)

{

// PORTF initialization

// OUT register

PORTF.OUT=0xff;

// Pin0: Input

// Pin1: Input

// Pin2: Output

// Pin3: Input

// Pin4: Input

// Pin5: Input

// Pin6: Input

// Pin7: Input

PORTF.DIR=0x04;

// Pin0 Output/Pull configuration: Totempole/PULLUP

// Pin0 Input/Sense configuration: Sense both edges

// Pin0 Inverted: Off

// Pin0 Slew Rate Limitation: Off

PORTF.PIN0CTRL=PORT_OPC_TOTEM_gc | PORT_ISC_BOTHEDGES_gc|PORT_OPC_PULLUP_gc;

// Pin1 Output/Pull configuration: Totempole/PULLUP

// Pin1 Input/Sense configuration: Sense both edges

// Pin1 Inverted: Off

// Pin1 Slew Rate Limitation: Off

PORTF.PIN1CTRL=PORT_OPC_TOTEM_gc | PORT_ISC_BOTHEDGES_gc|PORT_OPC_PULLUP_gc;

// Pin2 Output/Pull configuration: Totempole/PULLUP

// Pin2 Input/Sense configuration: Sense both edges

// Pin2 Inverted: Off

// Pin2 Slew Rate Limitation: Off

PORTF.PIN2CTRL=PORT_OPC_TOTEM_gc | PORT_ISC_BOTHEDGES_gc|PORT_OPC_PULLUP_gc;

// Pin3 Output/Pull configuration: Totempole/PULLUP

// Pin3 Input/Sense configuration: Sense both edges

// Pin3 Inverted: Off

// Pin3 Slew Rate Limitation: Off

PORTF.PIN3CTRL=PORT_OPC_TOTEM_gc | PORT_ISC_BOTHEDGES_gc|PORT_OPC_PULLUP_gc;

// Pin4 Output/Pull configuration: Totempole/PULLUP

// Pin4 Input/Sense configuration: Sense both edges

// Pin4 Inverted: Off

// Pin4 Slew Rate Limitation: Off

PORTF.PIN4CTRL=PORT_OPC_TOTEM_gc | PORT_ISC_BOTHEDGES_gc|PORT_OPC_PULLUP_gc;

// Pin5 Output/Pull configuration: Totempole/PULLUP

// Pin5 Input/Sense configuration: Sense both edges

// Pin5 Inverted: Off

// Pin5 Slew Rate Limitation: Off

PORTF.PIN5CTRL=PORT_OPC_TOTEM_gc | PORT_ISC_BOTHEDGES_gc|PORT_OPC_PULLUP_gc;

// Pin6 Output/Pull configuration: Totempole/PULLUP

// Pin6 Input/Sense configuration: Sense both edges

// Pin6 Inverted: Off

// Pin6 Slew Rate Limitation: Off

PORTF.PIN6CTRL=PORT_OPC_TOTEM_gc | PORT_ISC_BOTHEDGES_gc|PORT_OPC_PULLUP_gc;

// Pin7 Output/Pull configuration: Totempole/PULLUP

// Pin7 Input/Sense configuration: Sense both edges

// Pin7 Inverted: Off

// Pin7 Slew Rate Limitation: Off

PORTF.PIN7CTRL=PORT_OPC_TOTEM_gc | PORT_ISC_BOTHEDGES_gc|PORT_OPC_PULLUP_gc;

// Interrupt 0 level: Disabled

// Interrupt 1 level: Disabled

PORTF.INTCTRL=(PORTF.INTCTRL & (~(PORT_INT1LVL_gm | PORT_INT0LVL_gm))) |

PORT_INT1LVL_OFF_gc | PORT_INT0LVL_OFF_gc;

// Pin0 Pin Change interrupt 0: Off

// Pin1 Pin Change interrupt 0: Off

// Pin2 Pin Change interrupt 0: Off

// Pin3 Pin Change interrupt 0: Off

// Pin4 Pin Change interrupt 0: Off

// Pin5 Pin Change interrupt 0: Off

// Pin6 Pin Change interrupt 0: Off

// Pin7 Pin Change interrupt 0: Off

PORTF.INT0MASK=0x00;

// Pin0 Pin Change interrupt 1: Off

// Pin1 Pin Change interrupt 1: Off

// Pin2 Pin Change interrupt 1: Off

// Pin3 Pin Change interrupt 1: Off

// Pin4 Pin Change interrupt 1: Off

// Pin5 Pin Change interrupt 1: Off

// Pin6 Pin Change interrupt 1: Off

// Pin7 Pin Change interrupt 1: Off

PORTF.INT1MASK=0x00;

}

//主程序函数

void main(){

unsigned char n;

int i,j,k;

#pragma optsize-

// Make sure the interrupts are disabled

#asm("cli")

// Low level interrupt: On

// Round-robin scheduling for low level interrupt: On

// Medium level interrupt: On

// High level interrupt: On

// The interrupt vectors will be placed at the start of the Application FLASH section

PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm|PMIC_RREN_bm;

CCP=CCP_IOREG_gc;

PMIC.CTRL=n;

// Set the default priority for round-robin scheduling

PMIC.INTPRI=0x00;

// Restore optimization for size if needed

#pragma optsize_default

//初始化PORT和System_Clock

system_clocks_init();

ports_init();

//测试灯带：20个灯珠同种颜色循环100次

K=0;

while (k++<100){

for(i = 0;i<COLOR_NUM ; i++) {

// 1. lighten all the lights

for(j = 0; j < LIGHT_NUM; j++)

send_data(rainbow.red, rainbow.green, rainbow.blue,rainbow.white);

delay_ms(500);

ledstrap_reset();

}

只看该作者 · 2023-2-21 15:29

这个程序适合没有中断程序打断发送函数的情形。如果要用单片级控制SK6812RGBW灯带，最好做个专门的单片机控制板，不用中断，或只有一个中断，这个中断用于定时，在这个中断程序中发送颜色数据。进入中断后，首先关闭全局中断，退出中断前，再打开全局中断。

只看该作者 · 2023-11-1 09:07

AVR单片机Atxmega128A3U点亮SK6812RGBW灯带显示程序

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