add animation

main.c

@@ -20,6 +20,7 @@
 #include <stdlib.h> // standard utilities
 #include <unistd.h> // standard streams
 #include <errno.h> // error number utilities
+#include <string.h> // stting utilities
 
 /* STM32 (including CM3) libraries */
 #include <libopencm3/stm32/rcc.h> // real-time control clock library
@@ -75,9 +76,9 @@ int main(void)
 	setbuf(stdout, NULL); // set standard out buffer to NULL to immediately print	
 	setbuf(stderr, NULL); // set standard error buffer to NULL to immediately print
 
-	printf("welcome to the STM32F1 CuVoodoo display driver\n");
-
+	printf("welcome to the STM32F1 CuVoodoo vacuum fluorescent display driver\n");
 
+	printf("testing VFD\n");
 	vfd_on(); // switch on VFD
 	vfd_test(); // show all anodes
 	for (uint32_t i = 0; i < 0x800000; i++) { // show for a bit of time
@@ -85,6 +86,40 @@ int main(void)
 	}
 	vfd_clear(); // clear all data
 
+	printf("scrolling message\n");
+	const char* message = "            follow the white rabbit  "; // message to display (shifted by left-padded by VFD_MATRIX (12), right padded by VFD_MATRIX-VFD_DIGITS (2))
+	for (uint8_t i=0; i<strlen(message); i++) { // scroll through message (from right to left)
+		vfd_clear(); // clear display
+		for (uint8_t j=i; j<strlen(message); j++) { // display message
+			if (j+2<(uint8_t)strlen(message)) { // align VFD_MATRIX (12) to VFD_DIGITS (10)
+				vfd_digit(j-i,message[j+2]); // shift the matrix display
+			}
+			vfd_matrix(j-i,message[j]); // show digit
+		}
+		for (uint32_t j = 0; j < 0x200000; j++) { // show for a bit of time
+			__asm__("nop");
+		}
+	}
+	vfd_clear(); // clear all data
+	
+	printf("showing animation\n");
+	// show rabbit + number animation
+	const uint8_t animation[] = {2,3,2,3,2,3,7,6,7,6,7,6}; // rabbit animation (using pict5x7)
+	for (uint8_t i=0; i<sizeof(animation) && i<VFD_MATRIX; i++) {
+		vfd_clear(); // clear display
+		vfd_matrix(i,0x80+animation[i]); // show rabbit
+		for (uint8_t j=0; j<50; j++) {
+			for (uint8_t k=0; k<VFD_DIGITS; k++) {
+				vfd_digit(k,'0'+(rand()%10)); // show (not very) random number
+				for (uint32_t l = 0; l<0x4000; l++) { // show for a bit of time
+					__asm__("nop");
+				}
+			}
+		}
+	}
+	vfd_clear(); // clear all data
+
+	printf("type to display\n");
 	uint8_t vfd_place = 0; // the place on which the next character will be displayed on the VFD
 	bool vfd_flag = false; // do something with the VFD
 	char c = 0; // the character to display
@@ -99,7 +134,7 @@ int main(void)
 		}
 		while (vfd_flag) {
 			vfd_flag = false;
-				printf("%c", c); // transmit receive character
+			printf("%c", c); // transmit receive character
 			gpio_toggle(LED_PORT, LED_PIN); // toggle LED to show activity
 			if (c=='\r' || c=='\n') { // on newline
 				vfd_clear(); // clear display