From 49447b2738a874071a2a4bb61b3e0c2af6be989f Mon Sep 17 00:00:00 2001
From: guowenxue <guowenxue@gmail.com>
Date: Wed, 08 Oct 2025 19:31:43 +0800
Subject: [PATCH] WS2812B Led灯带程序
---
Core/Src/board/ws2812b.h | 55 +++++++++++
Core/Src/board/ws2812b.c | 183 ++++++++++++++++++++++++++++++++++++
Core/Src/main.c | 11 +-
3 files changed, 243 insertions(+), 6 deletions(-)
diff --git a/Core/Src/board/ws2812b.c b/Core/Src/board/ws2812b.c
new file mode 100644
index 0000000..074992a
--- /dev/null
+++ b/Core/Src/board/ws2812b.c
@@ -0,0 +1,183 @@
+/**********************************************************************
+ * Copyright: (C)2024 LingYun IoT System Studio
+ * Author: GuoWenxue<guowenxue@gmail.com>
+ *
+ * Description: WS2812B strip lights driver on ISKBoard
+ *
+ * Reference : https://blog.csdn.net/Lennon8_8/article/details/108980808
+ *
+ * ChangeLog:
+ * Version Date Author Description
+ * V1.0.0 2024.08.29 GuoWenxue Release initial version
+ *
+ ***********************************************************************/
+#include <string.h>
+#include <stdint.h>
+#include "ws2812b.h"
+#include "miscdev.h"
+
+#ifdef USE_FREERTOS
+#include "cmsis_os.h"
+#define mdelay(ms) osDelay(ms)
+#else
+#define mdelay(ms) HAL_Delay(ms)
+#endif
+
+static color_t g_ColorPanel[WS2812_NUM];
+
+typedef struct ws_gpio_s
+{
+ GPIO_TypeDef *group;
+ uint16_t pin;
+} ws_gpio_t;
+
+static ws_gpio_t ws_gpio = /* IO pin connected to PC2 */
+{
+ .group = GPIOC,
+ .pin = GPIO_PIN_2,
+};
+
+#define ws_setpin(x) if(!x) ws_gpio.group->BRR=ws_gpio.pin; else ws_gpio.group->BSRR=ws_gpio.pin
+
+/*
+ * 1 NOP = 1/80MHz = 12.5ns => 200ns = 8 * NOP
+ *
+ * */
+#define delay_200ns() { __NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP(); \
+ __NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP(); }
+
+void ws2812b_init(void)
+{
+ GPIO_InitTypeDef GPIO_InitStruct = {0};
+
+ GPIO_InitStruct.Pin = ws_gpio.pin;
+ GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+ GPIO_InitStruct.Pull = GPIO_NOPULL;
+ GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
+
+ HAL_GPIO_Init(ws_gpio.group, &GPIO_InitStruct);
+
+ ws2812b_reset();
+
+ return ;
+}
+
+static inline void ws2812b_WriteByte(uint8_t byte)
+{
+ int i;
+
+ for(i=0; i<8; i++)
+ {
+ if(byte & 0x80)
+ {
+ /* Sequence Send 1: T1H: 580ns~1.6us T1L: 200ns~420ns:
+ *
+ * +--------------+ +
+ * |<- T1H ->|<- T1L ->|
+ * | +---------+
+ */
+ ws_setpin(1); // T1H
+ udelay(1);
+
+ ws_setpin(0); // T1L
+ delay_200ns(); //200ns test okay
+ }
+ else
+ {
+ /* Sequence Send 0: T0H: 220ns~380ns T0L: 580ns~1.6ns:
+ *
+ * +---------+ +
+ * |<- T0H ->|<- T0L ->|
+ * | +--------------+
+ */
+ ws_setpin(1); // T0H
+ delay_200ns(); //200ns test okay
+
+ ws_setpin(0); // T0L
+ udelay(1);
+ }
+
+ byte<<=1;
+ }
+
+ return ;
+}
+
+void ws2812b_reset(void)
+{
+ /* Sequence Reset: Treset >280us:
+ *
+ * + +
+ * |<- Treset ->|
+ * +--------------+
+ */
+ ws_setpin(0);
+ udelay(300);
+
+ memset(g_ColorPanel, 0, sizeof(g_ColorPanel));
+
+ return ;
+}
+
+static inline void ws2812b_SendColor(color_t color)
+{
+ ws2812b_WriteByte(color.pixel.green);
+ ws2812b_WriteByte(color.pixel.red);
+ ws2812b_WriteByte(color.pixel.blue);
+
+ return ;
+}
+
+static inline void ws2812b_Refresh(void)
+{
+ int i;
+
+ for(i=0; i<WS2812_NUM; i++)
+ {
+ ws2812b_SendColor(g_ColorPanel[i]);
+ }
+
+ return ;
+}
+
+static inline int ws2812b_SetPixel(int which, color_t color)
+{
+ if( which<0 || which>=WS2812_NUM )
+ return -1;
+
+ g_ColorPanel[which].pixel.red = color.pixel.red;
+ g_ColorPanel[which].pixel.green = color.pixel.green;
+ g_ColorPanel[which].pixel.blue = color.pixel.blue;
+
+ return 0;
+}
+
+int ws2812b_turn(int which, color_t color)
+{
+ if( which<0 || which>=WS2812_NUM )
+ return -1;
+
+ ws2812b_SetPixel(which, color);
+ ws2812b_Refresh();
+
+ return 0;
+}
+
+void ws2812b_blink(void)
+{
+ int c, i;
+ color_t colors[4] = {[0].data=PIXEL_B, [1].data=PIXEL_R, [2].data=PIXEL_G, [3].data=PIXEL_W};
+ color_t color_off = {.data = PIXEL_OFF};
+
+ for(c=0; c<4; c++) /* color */
+ {
+ for(i=0; i<WS2812_NUM; i++)
+ {
+ ws2812b_turn(i, colors[c]);
+ mdelay(200);
+ ws2812b_turn(i, (color_t)color_off);
+ mdelay(200);
+ }
+ }
+}
+
diff --git a/Core/Src/board/ws2812b.h b/Core/Src/board/ws2812b.h
new file mode 100644
index 0000000..2f48bb5
--- /dev/null
+++ b/Core/Src/board/ws2812b.h
@@ -0,0 +1,55 @@
+/**********************************************************************
+ * Copyright: (C)2024 LingYun IoT System Studio
+ * Author: GuoWenxue<guowenxue@gmail.com>
+ *
+ * Description: WS2812B strip lights driver on ISKBoard
+ *
+ * Reference : https://blog.csdn.net/Lennon8_8/article/details/108980808
+ *
+ * ChangeLog:
+ * Version Date Author Description
+ * V1.0.0 2024.08.29 GuoWenxue Release initial version
+ *
+ ***********************************************************************/
+
+#ifndef __WS2812B_H_
+#define __WS2812B_H_
+
+#include "stm32l4xx_hal.h"
+
+#define WS2812_NUM 3
+
+#define PIXEL_OFF 0 /* off */
+#define PIXEL_B (0xFF<<0) /* blue */
+#define PIXEL_R (0xFF<<8) /* red */
+#define PIXEL_G (0xFF<<16) /* green */
+#define PIXEL_W (0xFFFFFF) /* white */
+
+/* Composition of 24 bits data: GRB888
+ * +----+----+----+----+----+----+----+----+----+
+ * | G7 | ...| G0 | R7 | ...| R0 | B7 | ...| B0 |
+ * +----+----+----+----+----+----+----+----+----+
+ */
+typedef struct pixel_s
+{
+ uint32_t blue:8;
+ uint32_t red:8;
+ uint32_t green:8;
+} pixel_t;
+
+typedef union color_u
+{
+ pixel_t pixel;
+ uint32_t data;
+} color_t;
+
+
+extern void ws2812b_init(void);
+
+extern void ws2812b_reset(void);
+
+extern int ws2812b_turn(int which, color_t color);
+
+extern void ws2812b_blink(void);
+
+#endif /* __WS2812B_H_ */
diff --git a/Core/Src/main.c b/Core/Src/main.c
index 970851f..6e3ad7a 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -26,6 +26,7 @@
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "miscdev.h"
+#include "ws2812b.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
@@ -95,19 +96,17 @@
MX_TIM1_Init();
/* USER CODE BEGIN 2 */
- init_relay();
- init_led();
-
+ ws2812b_init();
beep_start(2, 300);
+
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
- toggle_led(Led_B);
- for(int i=0; i<1000; i++)
- udelay(3000);
+ /* Blink WS2812B strip lights */
+ ws2812b_blink();
/* USER CODE END WHILE */
--
Gitblit v1.9.1