Rendy Devara
This is an example program of WS2812 library https://developer.mbed.org/users/devararendy/code/WS2812/ in main program, i also put some line to measure how many asm NOP do we need. I have test it on STM32F411RE (Nucleo 411RE). if you would like to use another microcontroller, you need to adjust the asm("nop") in the library.
Dependencies: USBDevice WS2812 mbed-os
Diff: main.cpp
- Revision:
- 0:a27bf0451169
- Child:
- 2:0d3906d69a41
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sat Dec 10 08:26:36 2016 +0000
@@ -0,0 +1,253 @@
+#include "mbed.h"
+#include "USBSerial.h"
+#include "WS2812.h"
+
+#define LED_RGB PA_1
+
+WS2812 RGB(LED_RGB, 1);
+DigitalOut test(PB_7);
+
+USBSerial serial;
+unsigned int timerValue;
+static TIM_HandleTypeDef s_TimerInstance = {
+ .Instance = TIM2
+};
+void InitializeTimer()
+{
+ __TIM2_CLK_ENABLE();
+ s_TimerInstance.Init.Prescaler = 1;
+ s_TimerInstance.Init.CounterMode = TIM_COUNTERMODE_UP;
+ s_TimerInstance.Init.Period = 45000000; //tim clock = 45MHz, 1Sec = 1 Period
+ s_TimerInstance.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
+ s_TimerInstance.Init.RepetitionCounter = 0;
+ HAL_TIM_Base_Init(&s_TimerInstance);
+ HAL_TIM_Base_Start(&s_TimerInstance);
+}
+int main(void)
+{
+ wait(3);
+ InitializeTimer();
+ serial.printf("Welcome to STM32FC RGB LED Tester\r\n");
+ while(1)
+ {
+ /*
+ timerValue = __HAL_TIM_GET_COUNTER(&s_TimerInstance);
+ test = 1;
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ timerValue = __HAL_TIM_GET_COUNTER(&s_TimerInstance) - timerValue;
+
+ unsigned int timerValue2 = __HAL_TIM_GET_COUNTER(&s_TimerInstance);
+ test = 0;
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ timerValue2 = __HAL_TIM_GET_COUNTER(&s_TimerInstance) - timerValue2;
+
+ serial.printf("Send 0 val %u, val2 = %u \r\n", timerValue, timerValue2);
+ //////////////////////////////////////////////////////////////////////////
+ timerValue = __HAL_TIM_GET_COUNTER(&s_TimerInstance);
+ test = 1;
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ timerValue = __HAL_TIM_GET_COUNTER(&s_TimerInstance) - timerValue;
+
+ timerValue2 = __HAL_TIM_GET_COUNTER(&s_TimerInstance);
+ test = 0;
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ timerValue2 = __HAL_TIM_GET_COUNTER(&s_TimerInstance) - timerValue2;
+
+ serial.printf("Send 1 val %u, val2 = %u \r\n", timerValue, timerValue2);
+ */
+ /*
+ RGB.writeColor(0xffffff);
+ RGB.sendReset();
+ serial.printf("R = 0x%X, G = 0x%X ,B = 0x%X\r\n", RGB.Red, RGB.Green, RGB.Blue);
+ wait(2);
+ RGB.writeColor(0xff00ff);
+ RGB.sendReset();
+ serial.printf("R = 0x%X, G = 0x%X ,B = 0x%X\r\n", RGB.Red, RGB.Green, RGB.Blue);
+ wait(2);
+ RGB.writeColor(0xffff00);
+ RGB.sendReset();
+ serial.printf("R = 0x%X, G = 0x%X ,B = 0x%X\r\n", RGB.Red, RGB.Green, RGB.Blue);
+ wait(2);
+ */
+
+ RGB.send1Color(0xFF0000);
+ Thread::wait(1000);
+ RGB.send1Color(0xFF00);
+ Thread::wait(1000);
+ RGB.send1Color(0xFF);
+ Thread::wait(1000);
+ RGB.send1Color(0xFFFF00);
+ Thread::wait(1000);
+ RGB.send1Color(0xFFFF);
+ Thread::wait(1000);
+ RGB.send1Color(0xFF00FF);
+ Thread::wait(1000);
+
+ RGB.send1Color(0xff8000);
+ Thread::wait(1000);
+ RGB.send1Color(0x9933ff);
+ Thread::wait(1000);
+ RGB.send1Color(0xff3300);
+ Thread::wait(1000);
+ RGB.send1Color(0x99cc00);
+ Thread::wait(1000);
+ RGB.send1Color(0xff99ff);
+ Thread::wait(1000);
+ RGB.send1Color(0x009999);
+ Thread::wait(1000);
+
+ }
+}
\ No newline at end of file