initial commit

2025-08-02 06:09:31 +03:00
commit 00015ffc03
85 changed files with 62051 additions and 0 deletions
--- a/FIRMWARE/riscv_logo.c
+++ b/FIRMWARE/riscv_logo.c
@@ -0,0 +1,135 @@
+/* 
+ * FEMTORV32 - FEMTOSOC demo program:
+ * Displaying a rotating RISCV logo
+ */ 
+
+#include <stdio.h>
+
+#ifdef __linux__
+#include <unistd.h>
+#endif
+
+
+/* The RISCV logo, with a tiny resolution
+ * (remember, I only got 4Kb of RAM
+ * on the IceStick !) 
+ */
+unsigned char logo[16][16] = {
+   {7,7,7,7,7,7,5,3,3,3,3,3,3,3,3,7},
+   {7,7,7,7,7,7,7,5,3,3,3,3,3,3,3,7},
+   {1,1,1,1,2,7,7,7,3,3,3,3,3,3,3,7},
+   {0,0,0,0,0,1,7,7,5,3,3,3,3,3,3,7},
+   {0,0,0,0,0,0,7,7,6,3,3,3,3,3,6,7},
+   {0,0,0,0,0,0,7,7,5,3,3,3,3,4,7,7},
+   {0,0,0,0,0,2,7,7,4,3,3,3,3,7,7,7},
+   {0,2,2,2,7,7,7,6,3,3,3,3,6,7,7,7},
+   {0,7,7,7,7,7,6,3,3,3,3,5,7,7,2,7},
+   {0,1,7,7,7,4,3,3,3,3,3,7,7,7,0,7},
+   {0,0,2,7,7,6,3,3,3,3,6,7,7,1,0,7},
+   {0,0,0,2,7,7,5,3,3,5,7,7,2,0,0,7},
+   {0,0,0,0,7,7,7,5,4,7,7,2,0,0,0,7},
+   {0,0,0,0,0,7,7,7,7,7,7,0,0,0,0,7},
+   {0,0,0,0,0,1,7,7,7,7,1,0,0,0,0,7},
+   {7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7}
+};
+
+
+/* 
+ * ANSI color codes:
+ * https://stackoverflow.com/questions/4842424/list-of-ansi-color-escape-sequences
+ */
+
+
+#define ANSIRGB(R,G,B) "\033[48;2;" #R ";"  #G ";" #B "m  "
+
+#define ANSICOL(C) "\033[" #C "m  "
+
+
+/* 
+ * The colormap.
+ */
+
+/*
+ * This ones corresponds to the official RISC-V logo,
+ * but uses more bandwidth (full RGB ANSI codes)
+ */
+/*
+const char* cmap[8] = {
+   ANSIRGB(040,051,116),
+   ANSIRGB(123,128,155),
+   ANSIRGB(170,172,188),
+   ANSIRGB(249,177,021),
+   ANSIRGB(249,190,101),
+   ANSIRGB(249,199,130),
+   ANSIRGB(252,216,176),
+   ANSIRGB(250,251,248)
+};
+*/
+
+/* more compact colormap */
+const char* cmap[8] = {
+   ANSICOL(44),
+   ANSICOL(104),
+   ANSICOL(47),
+   ANSICOL(102),
+   ANSICOL(103),
+   ANSICOL(103),
+   ANSICOL(103),
+   ANSICOL(107)
+};
+
+/*
+ * Generated by TOOLS/make_sintab.c
+ */
+
+int sintab[64] = {
+   0,25,49,74,97,120,142,162,181,197,212,225,236,244,251,254,
+   256,254,251,244,236,225,212,197,181,162,142,120,97,74,49,25,
+   0,-25,-49,-74,-97,-120,-142,-162,-181,-197,-212,-225,-236,-244,
+   -251,-254,-256,-254,-251,-244,-236,-225,-212,-197,-181,-162,
+   -142,-120,-97,-74,-49,-25
+};
+
+
+#define GL_width  40
+#define GL_height 40
+
+
+void main() {
+
+    int frame = 0;
+    int last_col = -1;
+    for(;;) {
+        printf("\033[H"); // reset cursor position
+
+        int scaling = (sintab[frame&63]+400) << 1;
+        int Ux = scaling*sintab[frame & 63];         
+        int Uy = scaling*sintab[(frame + 16) & 63];  
+        int Vx = -Uy;                                
+        int Vy =  Ux;                                
+
+        int X0 = -(GL_width/2)*(Ux+Vx);
+        int Y0 = -(GL_height/2)*(Uy+Vy);
+
+	for(int y=0; y<GL_height; ++y) {
+	    int X = X0;
+	    int Y = Y0;
+	    for(int x=0; x<GL_width; ++x) {
+	        unsigned char col = logo[(Y >> 18)&15][(X >> 18)&15];
+	        printf(col == last_col ? "  " : cmap[col]);
+	        last_col = col;
+	        X += Ux;
+	        Y += Uy;
+	    }
+	    printf("\033[49m\n"); // reset color to black and newline
+	    last_col = -1;
+	    X0 += Vx;
+	    Y0 += Vy;
+	}
+        ++frame;
+#ifdef __linux__       
+        usleep(20000);
+#endif
+//       if(frame > 20) break;
+    }
+}