Adds starfield
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3ae85de2d9
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06ebb82a70
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@ -1,4 +1,4 @@
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#include <stdlib.h>
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#include "stm32f4xx_hal.h"
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#include "fonts.h"
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@ -49,6 +49,10 @@
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#define SSD1306_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL 0x29
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#define SSD1306_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL 0x2A
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#ifndef _swap_int16_t
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#define _swap_int16_t(a, b) { int16_t t = a; a = b; b = t; }
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#endif
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//
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// Enum voor de kleuren van het scherm Black en White
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//
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@ -84,5 +88,6 @@ void ssd1306_SetCursor(uint8_t x, uint8_t y);
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void ssd1306_WriteCommand(uint8_t command);
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void ssd1306_Scroll(void);
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void startscrollright(uint8_t start, uint8_t stop);
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void drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1);
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#endif
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188
Src/main.c
188
Src/main.c
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@ -33,6 +33,7 @@
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/* Includes ------------------------------------------------------------------*/
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#include <string.h>
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#include <stdlib.h>
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#include <math.h>
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#include "main.h"
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#include "stm32f4xx_hal.h"
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@ -54,6 +55,29 @@ char UART_Buffer[32];
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char text[32];
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int i;
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typedef struct {
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float x;
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float y;
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float z;
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} triPoint;
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triPoint vertices[8];
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triPoint lineVertices[8];
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uint32_t angleX = 0;
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uint32_t angleY = 0;
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uint32_t angleZ = 0;
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struct _tStar
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{
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unsigned char nX;
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unsigned char nY;
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unsigned char nStarType;
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};
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#define STARS_NUM 80
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struct _tStar aStars[STARS_NUM];
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/* USER CODE END PV */
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/* Private function prototypes -----------------------------------------------*/
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@ -69,13 +93,92 @@ static void MX_USART1_UART_Init(void);
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/* USER CODE END PFP */
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/* USER CODE BEGIN 0 */
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triPoint rotateX(triPoint startingPoint, uint16_t angle) {
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triPoint computedPoint;
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float rad = angle * 3.141592 / 180;
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float cosa = cos(rad);
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float sina = sin(rad);
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computedPoint.x = startingPoint.x;
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computedPoint.y = (startingPoint.y * cosa) - (startingPoint.z * sina);
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computedPoint.z = (startingPoint.y * sina) + (startingPoint.z * cosa);
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return computedPoint;
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}
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triPoint rotateY(triPoint startingPoint, uint16_t angle) {
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triPoint computedPoint;
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float rad = angle * 3.141592 / 180;
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float cosa = cos(rad);
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float sina = sin(rad);
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computedPoint.y = startingPoint.y;
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computedPoint.z = (startingPoint.z * cosa) - (startingPoint.x * sina);
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computedPoint.x = (startingPoint.z * sina) + (startingPoint.x * cosa);
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return computedPoint;
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}
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triPoint rotateZ(triPoint startingPoint, uint16_t angle) {
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triPoint computedPoint;
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float rad = angle * 3.141592 / 180;
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float cosa = cos(rad);
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float sina = sin(rad);
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computedPoint.z = startingPoint.z;
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computedPoint.x = (startingPoint.x * cosa) - (startingPoint.y * sina);
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computedPoint.y = (startingPoint.x * sina) + (startingPoint.y * cosa);
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return computedPoint;
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}
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triPoint projectPoint(triPoint startingPoint, uint8_t win_width, uint8_t win_height, uint8_t fov, uint8_t viewer_distance) {
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triPoint returnPoint;
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float factor = fov/(viewer_distance + startingPoint.z);
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returnPoint.x = startingPoint.x * factor + win_width/2;
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returnPoint.y = -startingPoint.y * factor + win_height/2;
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returnPoint.z = 1;
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return returnPoint;
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}
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/* USER CODE END 0 */
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int main(void)
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{
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/* USER CODE BEGIN 1 */
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vertices[0].x = -1;
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vertices[0].y = 1;
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vertices[0].z = -1;
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vertices[1].x = 1;
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vertices[1].y = 1;
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vertices[1].z = -1;
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vertices[2].x = 1;
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vertices[2].y = -1;
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vertices[2].z = -1;
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vertices[3].x = -1;
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vertices[3].y = -1;
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vertices[3].z = -1;
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vertices[4].x = -1;
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vertices[4].y = 1;
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vertices[4].z = 1;
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vertices[5].x = 1;
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vertices[5].y = 1;
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vertices[5].z = 1;
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vertices[6].x = 1;
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vertices[6].y = -1;
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vertices[6].z = 1;
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vertices[7].x = -1;
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vertices[7].y = -1;
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vertices[7].z = 1;
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triPoint calcPoint, newPoint;
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unsigned char nStar = 0;
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memset(aStars, 0, sizeof(aStars));
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//Init
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for(nStar = 0; nStar < STARS_NUM; nStar++)
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{
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aStars[nStar].nX = rand() % 128;
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aStars[nStar].nY = rand() % 64;
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aStars[nStar].nStarType = rand() % 3;
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}
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/* USER CODE END 1 */
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/* MCU Configuration----------------------------------------------------------*/
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@ -100,18 +203,24 @@ int main(void)
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ssd1306_DrawPixel(y, 20, White);
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}
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*/
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//drawLine(1, 1, 20, 20);
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//ssd1306_UpdateScreen();
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/* USER CODE END 2 */
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/* Infinite loop */
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/* USER CODE BEGIN WHILE */
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int zbr = 40;
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int direction = 1;
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while (1)
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{
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/* USER CODE END WHILE */
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/* USER CODE BEGIN 3 */
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ssd1306_Fill(Black);
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//ssd1306_UpdateScreen();
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/*
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int x, msg;
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//HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_6); //Toggle the state of pin PC9
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HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_6); //Toggle the state of pin PC9
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//DHT22_Read(htim6);
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@ -127,16 +236,81 @@ int main(void)
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msg = rand() % 2 + 1;
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ssd1306_SetCursor(x, 53);
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ssd1306_WriteString((msg == 1) ? "GORDOS" : "LOL", Font_7x10, White);
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/*
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for(int y = 0; y < 129; y++) {
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ssd1306_DrawPixel(y, 63, White);
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}
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*/
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for(nStar = 0; nStar < STARS_NUM; nStar++) {
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//move star
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switch(aStars[nStar].nStarType) {
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case 0: //slow star
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aStars[nStar].nX += 2;
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break;
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case 1: //medium star
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aStars[nStar].nX += 3;
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break;
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case 2: //fast star
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aStars[nStar].nX += 4;
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break;
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}
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if (aStars[nStar].nX >= 160) {
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HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_6); //Toggle the state of pin PC9
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aStars[nStar].nX = 0;
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aStars[nStar].nY = rand() % 200;
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aStars[nStar].nStarType = rand() % 3;
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continue;
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}
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//paint star
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ssd1306_DrawPixel(aStars[nStar].nX, aStars[nStar].nY, White);
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}
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/*
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ssd1306_SetCursor(zbr - 39, (sin(zbr) * 10) + 10);
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ssd1306_WriteString("LOLGORDOS", Font_7x10, White);
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//ssd1306_SetCursor(zbr - 39, 53);
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ssd1306_SetCursor(zbr - 39, (sin(zbr) * 10) + 43);
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ssd1306_WriteString("DEMOSCENE", Font_7x10, White);
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*/
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if (direction == 1) {
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zbr++;
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} else {
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zbr--;
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}
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for (uint8_t i = 0; i<8; i++) {
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calcPoint = rotateZ(vertices[i],angleZ++);
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calcPoint = rotateY(calcPoint,angleY++);
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calcPoint = rotateX(calcPoint,angleX++);
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newPoint = projectPoint(calcPoint, 128, 64, zbr, 5);
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lineVertices[i] = newPoint;
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}
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drawLine(lineVertices[0].x,lineVertices[0].y,lineVertices[1].x,lineVertices[1].y);
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drawLine(lineVertices[1].x,lineVertices[1].y,lineVertices[2].x,lineVertices[2].y);
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drawLine(lineVertices[2].x,lineVertices[2].y,lineVertices[3].x,lineVertices[3].y);
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drawLine(lineVertices[3].x,lineVertices[3].y,lineVertices[0].x,lineVertices[0].y);
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drawLine(lineVertices[0].x,lineVertices[0].y,lineVertices[4].x,lineVertices[4].y);
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drawLine(lineVertices[1].x,lineVertices[1].y,lineVertices[5].x,lineVertices[5].y);
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drawLine(lineVertices[2].x,lineVertices[2].y,lineVertices[6].x,lineVertices[6].y);
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drawLine(lineVertices[3].x,lineVertices[3].y,lineVertices[7].x,lineVertices[7].y);
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drawLine(lineVertices[4].x,lineVertices[4].y,lineVertices[5].x,lineVertices[5].y);
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drawLine(lineVertices[5].x,lineVertices[5].y,lineVertices[6].x,lineVertices[6].y);
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drawLine(lineVertices[6].x,lineVertices[6].y,lineVertices[7].x,lineVertices[7].y);
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drawLine(lineVertices[7].x,lineVertices[7].y,lineVertices[4].x,lineVertices[4].y);
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ssd1306_UpdateScreen();
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HAL_Delay(25);
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if (zbr > 100) {
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direction = 0;
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}
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if (zbr < 40) {
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direction = 1;
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}
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}
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/* USER CODE END 3 */
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}
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/** System Clock Configuration
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@ -1,7 +1,6 @@
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#include"ssd1306.h"
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// Databuffer voor het scherm
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//static uint8_t SSD1306_Buffer[SSD1306_WIDTH * SSD1306_HEIGHT / 8];
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static uint8_t SSD1306_Buffer[SSD1306_HEIGHT * SSD1306_WIDTH / 8];
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// Een scherm-object om lokaal in te werken
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@ -18,19 +17,78 @@ void startscrollright(uint8_t start, uint8_t stop){
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ssd1306_WriteCommand(SSD1306_ACTIVATE_SCROLL);
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}
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void ssd1306_Scroll()
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void drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1)
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{
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static uint32_t end = SSD1306_WIDTH * 8;
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uint8_t bit_antigo = 0;
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int16_t steep = abs(y1 - y0) > abs(x1 - x0);
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if (steep) {
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_swap_int16_t(x0, y0);
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_swap_int16_t(x1, y1);
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}
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for(uint32_t addr = 0; addr < end; addr++) {
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if (addr > 0x79) {
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bit_antigo = SSD1306_Buffer[addr] & 0x01;
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if (x0 > x1) {
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_swap_int16_t(x0, x1);
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_swap_int16_t(y0, y1);
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}
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int16_t dx, dy;
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dx = x1 - x0;
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dy = abs(y1 - y0);
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int16_t err = dx / 2;
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int16_t ystep;
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if (y0 < y1) {
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ystep = 1;
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} else {
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ystep = -1;
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}
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for (; x0<=x1; x0++) {
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if (steep) {
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ssd1306_DrawPixel(y0, x0, White);
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} else {
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ssd1306_DrawPixel(x0, y0, White);
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}
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err -= dy;
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if (err < 0) {
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y0 += ystep;
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err += dx;
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}
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}
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}
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SSD1306_Buffer[addr] >>= 1;
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bit_antigo <<= 7;
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SSD1306_Buffer[addr - SSD1306_WIDTH] |= bit_antigo;
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/**
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* [ssd1306_ScrollUp scrolls the whole LCD buffer up]
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* @param pixels [How many pixels to scroll up]
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* @param delay [Delay between refresh]
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*/
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void ssd1306_ScrollUp(unsigned int pixels, unsigned int delay)
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{
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static uint32_t end_addr = SSD1306_WIDTH * 8;
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char lost_bit = 0;
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for(uint8_t times = 0; times < pixels; times++) {
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for(uint32_t addr = 0; addr < end_addr; addr++) {
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// In the first bank we dont need to keep the lost bit
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if (addr > 0x79) {
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lost_bit = SSD1306_Buffer[addr] & 0x01;
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}
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// Shift one pixel "up"
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SSD1306_Buffer[addr] >>= 1;
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// In the first bank we dont need to do this
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if (addr > 0x79) {
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// Move the saved bit from the LSB to the MSB
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lost_bit <<= 7;
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// Add the saved bit to the bank above it
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SSD1306_Buffer[addr - SSD1306_WIDTH] |= lost_bit;
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}
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}
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ssd1306_UpdateScreen();
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HAL_Delay(delay);
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}
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}
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