开始之前先吐槽一下，搜这个的资料。要么都是Arduino，要么单片机的收费。小小的一个LED单元板，凭什么？
用Arduino是你速度快还是我ST，树莓派不好用？收费更离谱，这点东西还藏私？给你个中指凸。把原理都写出来看你怎么收费。
一、接口定义及原理
如图，有两个RGB通道，共占用6个IO。剩下的ABCDE为地址通道，LAT为行数据锁存通道，CLK为数据时钟，OE为低电平使能LED显示。图片这里没有E，证明它是16扫的，有E就会把B上面的地改为E。这样就是5位，2的5次方32扫。16扫控制16行显示，共2个RGB通道所以16扫可以控制16*2=32行显示。
（1）单元板的显示为单位时间内显示一行数据，然后短时间内切换到另一行显示，16扫一个显示周期为切换16次。
（2）两个RGB通道分别控制上下两部分的RGB灯。图片中的为32*16。正常来说，需要3个地址ABC，假设ABC 3个IO为高电平意味着选定第7行跟第15行，RGB1通道数据被写到第7行，RGB2数据被写到第15行。(我这个板子比较坑，有点不同)
（3）数据的写入顺序，失能LED显示，写入一行数据，选定行，锁存，使能LED显示。
（4）颜色渐变，方法是同一行扫描32次，假设R1我只显示一次，那它占空比就是1/32，显示次数越多越来亮。
这方法挺麻烦，但暂时没想到别的方法。
By the way：我这板子比较奇怪，数据写入方式跟一般的板子不一样。具体看图：
数据填充的时候，RBG1通道前8个时钟周期数据在第0行，接下来8个时钟周期数据却跳到第4行去了。然后又跳回第一行。
正常的应该是一直往同一行填充数据才对的。所以我买的这个板子比较奇葩。
二、驱动代码
使用单片机为STM32F407VE，STM32CUBEMX生成代码
#include "main.h"#include "tim.h"#include "gpio.h"void SystemClock_Config(void);#define OE_H HAL_GPIO_WritePin(OE_GPIO_Port,OE_Pin,GPIO_PIN_SET)#define R1_H HAL_GPIO_WritePin(R1_GPIO_Port,R1_Pin,GPIO_PIN_SET)#define R2_H HAL_GPIO_WritePin(R2_GPIO_Port,R2_Pin,GPIO_PIN_SET)#define G1_H HAL_GPIO_WritePin(G1_GPIO_Port,G1_Pin,GPIO_PIN_SET)#define G2_H HAL_GPIO_WritePin(G2_GPIO_Port,G2_Pin,GPIO_PIN_SET)#define B1_H HAL_GPIO_WritePin(B1_GPIO_Port,B1_Pin,GPIO_PIN_SET)#define B2_H HAL_GPIO_WritePin(B2_GPIO_Port,B2_Pin,GPIO_PIN_SET)#define A_H HAL_GPIO_WritePin(A_GPIO_Port,A_Pin,GPIO_PIN_SET)#define B_H HAL_GPIO_WritePin(B_GPIO_Port,B_Pin,GPIO_PIN_SET)#define CLK_H HAL_GPIO_WritePin(CLK_GPIO_Port,CLK_Pin,GPIO_PIN_SET)#define LAT_H HAL_GPIO_WritePin(LAT_GPIO_Port,LAT_Pin,GPIO_PIN_SET)#define OE_L HAL_GPIO_WritePin(OE_GPIO_Port,OE_Pin,GPIO_PIN_RESET)#define R1_L HAL_GPIO_WritePin(R1_GPIO_Port,R1_Pin,GPIO_PIN_RESET)#define R2_L HAL_GPIO_WritePin(R2_GPIO_Port,R2_Pin,GPIO_PIN_RESET)#define G1_L HAL_GPIO_WritePin(G1_GPIO_Port,G1_Pin,GPIO_PIN_RESET)#define G2_L HAL_GPIO_WritePin(G2_GPIO_Port,G2_Pin,GPIO_PIN_RESET)#define B1_L HAL_GPIO_WritePin(B1_GPIO_Port,B1_Pin,GPIO_PIN_RESET)#define B2_L HAL_GPIO_WritePin(B2_GPIO_Port,B2_Pin,GPIO_PIN_RESET)#define A_L HAL_GPIO_WritePin(A_GPIO_Port,A_Pin,GPIO_PIN_RESET)#define B_L HAL_GPIO_WritePin(B_GPIO_Port,B_Pin,GPIO_PIN_RESET)#define CLK_L HAL_GPIO_WritePin(CLK_GPIO_Port,CLK_Pin,GPIO_PIN_RESET)#define LAT_L HAL_GPIO_WritePin(LAT_GPIO_Port,LAT_Pin,GPIO_PIN_RESET)//此单元板4扫一次性输入2行数据，2个通道，故控制2*2*LED_ROW=16行#define LED_ROW4//一行32个点#define LED_COLUMN 32typedef struct{uint16_t B:5;uint16_t G:5;uint16_t R:5;uint16_t null:1;}led_data;extern const unsigned char gImage_111[1024];led_data *img_data = (led_data*)gImage_111;void delay(uint16_t time){uint16_t i,j;for(i=0;i<time;i++)for(j=0;j<100;j++); }void led_DRamDis(led_data *pdata){uint16_t col_depth;uint16_t j,k,l;uint16_t row=0;uint16_t pos_down = LED_COLUMN*LED_ROW*2; //指向LED下半部分数据起点if(pdata == NULL) return;for(row = 0;row<LED_ROW;row++) //发送一扫数据{for(col_depth=0;col_depth<32;col_depth++) //每种颜色5bit，32种变化{OE_H;for(l=0;l<4;l++) //一行4*8像素点数据{for(k=0;k<2;k++) //发送16像素点数据后，数据被续写{for(j=0;j<8;j++) //发送8像素点数据后数据会跳转{ if(col_depth<pdata[j+row*32+32*LED_ROW*k+l*8].B) B1_H; elseB1_L; if(col_depth<pdata[j+row*32+32*LED_ROW*k+l*8].R) R1_H; elseR1_L; if(col_depth<pdata[j+row*32+32*LED_ROW*k+l*8].G) G1_H; elseG1_L; if(col_depth<pdata[j+row*32+pos_down+32*LED_ROW*k+l*8].B) B2_H; else B2_L; if(col_depth<pdata[j+row*32+pos_down+32*LED_ROW*k+l*8].R) R2_H; else R2_L; if(col_depth<pdata[j+row*32+pos_down+32*LED_ROW*k+l*8].G) G2_H; else G2_L; CLK_L;CLK_H;}}}//使能一行数据if(row&0x01) A_H;else A_L;if(row&0x02) B_H;else B_L;LAT_L;LAT_H; OE_L;delay(10); //短暂延时，让当前行数据显示一段时间}}}led_data img_data2[512];void RedDis(uint8_t r){uint16_t i;for(i=0;i<512;i++){img_data2[i].R = r;img_data2[i].G = 0;img_data2[i].B = 0;}for(i=0;i<5;i++)led_DRamDis(img_data2);}void BlueDis(uint8_t b){uint16_t i;for(i=0;i<512;i++){img_data2[i].R = 0;img_data2[i].G = 0;img_data2[i].B = b;}for(i=0;i<5;i++)led_DRamDis(img_data2);}void GreenDis(uint8_t g){uint16_t i;for(i=0;i<512;i++){img_data2[i].R = 0;img_data2[i].G = g;img_data2[i].B = 0;}for(i=0;i<5;i++)led_DRamDis(img_data2);}int main(void){uint16_t i;uint16_t *p;HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_TIM7_Init();while (1){for(i=0;i<16;i++)RedDis(i);for(i=0;i<16;i++)BlueDis(i);for(i=0;i<16;i++)GreenDis(i);for(i=0;i<100;i++)led_DRamDis(img_data);}}void SystemClock_Config(void){RCC_OscInitTypeDef RCC_OscInitStruct = {0};RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};/** Configure the main internal regulator output voltage */__HAL_RCC_PWR_CLK_ENABLE();__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);/** Initializes the CPU, AHB and APB busses clocks */RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;RCC_OscInitStruct.HSEState = RCC_HSE_ON;RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLM = 8;RCC_OscInitStruct.PLL.PLLN = 336;RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;RCC_OscInitStruct.PLL.PLLQ = 4;if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK){Error_Handler();}/** Initializes the CPU, AHB and APB busses clocks */RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK){Error_Handler();}}void Error_Handler(void){}
图像数据数组采用Image2Lcd 2.9生成，搞单片机的人应该对此很熟悉。16位RBG555数据格式
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三、效果图
改变每个RGB通道的占空比实现渐变（一行扫描32次），所以闪烁会严重些。
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