Add Serial example

Makefile

@@ -5,7 +5,7 @@ TYPE = ps-exe
 SRCS = hello_world.c \
 ../common/crt0/crt0.s \
 
-## Hello tile
+#~ ## Hello tile
 #~ TARGET = hello_tile
 #~ TYPE = ps-exe
 
@@ -19,14 +19,14 @@ SRCS = hello_world.c \
 #~ SRCS = hello_pad.c \
 #~ ../common/crt0/crt0.s \
 
-## Hello pad 2
+#~ ## Hello pad 2
 #~ TARGET = hello_2pads
 #~ TYPE = ps-exe
 
 #~ SRCS = hello_2pads.c \
 #~ ../common/crt0/crt0.s \
 
-## Hello poly
+#~ ## Hello poly
 #~ TARGET = hello_poly
 #~ TYPE = ps-exe
 
@@ -73,7 +73,7 @@ SRCS = hello_world.c \
 
 #~ SRCS = hello_vag.c \
 #~ ../common/crt0/crt0.s \
-#~ VAG/hello_poly.vag
+#~ VAG/hello_poly.vag \
 
 #~ ## hello multivag
 #~ TARGET = hello_multivag
@@ -81,10 +81,10 @@ SRCS = hello_world.c \
 
 #~ SRCS = hello_multivag.c \
 #~ ../common/crt0/crt0.s \
-#~ VAG/hello.vag
-#~ VAG/poly.vag
+#~ VAG/hello.vag \
+#~ VAG/poly.vag \
 
-## Poly fun !
+#~ ## Poly fun !
 #~ TARGET = fun_with_poly
 #~ TYPE = ps-exe
 
@@ -104,6 +104,13 @@ SRCS = hello_world.c \
 #~ ../common/crt0/crt0.s \
 #~ TIM/cubetex.tim \
 
+#~ ## Hello sio
+#~ TARGET = hello_sio
+#~ TYPE = ps-exe
+
+#~ SRCS = hello_sio.c \
+#~ ../common/crt0/crt0.s \
+
 CPPFLAGS += -I../psyq/include
 LDFLAGS += -L../psyq/lib
 LDFLAGS += -Wl,--start-group
@@ -128,6 +135,7 @@ LDFLAGS += -lsio
 LDFLAGS += -lsnd
 LDFLAGS += -lspu
 LDFLAGS += -ltap
+LDFLAGS += -lcd
 LDFLAGS += -Wl,--end-group
 
 include ../common.mk \

hello_sio.c

@@ -0,0 +1,219 @@
+// hello_sio example
+//
+// This example will display the RX data in a 64 char rolling buffer.
+// 
+// Use minicom or any other serial comm program and a serial/USB cable.
+//
+// Relevant doc is libref47.pdf, l.1120-1127
+//
+// Schnappy - 04/2021
+//
+// Based on :  ../psyq/psx/sample/serial/SIO
+//
+// sio echo back 
+// 1.00		Jan.28.1997	shino
+
+#include <sys/types.h>
+#include <libgte.h>
+#include <libgpu.h>
+#include <libetc.h>
+#include <stdio.h>
+
+// Needed for SIO operations
+
+#include <libsio.h>
+
+// Needed for manipulating strings
+
+#include <string.h>
+
+// Display stuff (see hello_tile for the basics)
+
+#define VMODE       0
+
+#define SCREENXRES 320
+
+#define SCREENYRES 240
+
+#define CENTERX     SCREENXRES/2
+
+#define CENTERY     SCREENYRES/2
+
+#define OTLEN       2048        // Maximum number of OT entries
+
+#define PRIMBUFFLEN 32768       // Maximum number of POLY_GT3 primitives
+
+// Display and draw environments, double buffered
+
+DISPENV disp[2];
+
+DRAWENV draw[2];
+
+u_long      ot[2][OTLEN];                   // Ordering table (contains addresses to primitives)
+
+char    primbuff[2][PRIMBUFFLEN] = {0};     // Primitive list // That's our prim buffer
+
+char * nextpri = primbuff[0];               // Primitive counter
+
+short           db  = 0;                    // Current buffer counter
+
+// SIO
+
+#define MAX_CHARS 64
+
+u_char SIO = 1;                             // Is SIO enabled ?
+
+u_char SIOinit = 0;                         // Is SIO initialized ?
+
+// Prototypes
+
+void init(void);
+
+void display(void);
+
+void init(){
+    
+    // Reset the GPU before doing anything and the controller
+    
+    ResetGraph(0);
+    
+    // Set the display and draw environments
+    
+    SetDefDispEnv(&disp[0], 0, 0         , SCREENXRES, SCREENYRES);
+    
+    SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES);
+    
+    SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES);
+    
+    SetDefDrawEnv(&draw[1], 0, 0, SCREENXRES, SCREENYRES);
+    
+    // If in PAL mode, add vertical offset
+    
+    if (VMODE)
+    {
+    
+        SetVideoMode(MODE_PAL);
+    
+        disp[0].screen.y += 8;
+    
+        disp[1].screen.y += 8;
+    }
+    
+    setRGB0(&draw[0], 0, 0, 255);
+    
+    setRGB0(&draw[1], 0, 0, 255);
+
+    draw[0].isbg = 1;
+    
+    draw[1].isbg = 1;
+
+    PutDispEnv(&disp[db]);
+    
+    PutDrawEnv(&draw[db]);
+        
+    // Init font system
+    
+    FntLoad(960, 0);
+    
+    FntOpen(16, 16, 196, 64, 0, 256);
+    
+    }
+
+void display(void){
+    
+    DrawSync(0);
+    
+    VSync(0);
+
+    PutDispEnv(&disp[db]);
+    
+    PutDrawEnv(&draw[db]);
+
+    SetDispMask(1);
+    
+    db = !db;
+    
+    }
+
+int main() {
+    
+    init();
+    
+    // Main loop
+    
+    while (1) {
+        
+        // Buffer for the RX data of size MAX_CHARS
+        
+        static char buffer[ MAX_CHARS ] = {0};
+        
+        // If SIO flag is set, initialize and get data
+        
+        if( SIO ){
+
+            // Is SIO is not initialized, dot it
+
+            if( ! SIOinit ){
+
+                ResetCallback();
+                
+                // Load SIO driver at 115200bps
+                
+                AddSIO(115200);
+                
+                ResetGraph(0);
+                
+                // Use _sio_control to clear driver status error-related bits
+                // See psyq's libref47.pdf, p.1125 for the commands and status tables
+                
+                _sio_control(2,1,0);
+                
+                SIOinit = 1;
+                
+            }
+            
+            // Limit input buffer to MAX_CHARS chars, making it a rolling buffer
+            
+            if( strlen(buffer) > MAX_CHARS ){
+               
+               // If that limit is reached, remove first char in string
+               
+               memmove(buffer, buffer + 1, strlen(buffer));
+               
+            }
+            
+            // Check if sio driver is able to write communications data
+            // If so, this means reading is not occuring
+            
+            if( _sio_control(0,0,0) & SR_RXRDY ){ // SR_RXRDY == 0x2
+                
+                // Read byte
+                
+                char c = _sio_control(0,4,0);
+                
+                // Add to buffer
+            
+                strncat(buffer, &c, 1);
+                
+            }
+            
+
+        }           
+
+      // END SIO FUN
+        
+        FntPrint("Hello Serial!\n\n");
+        
+        if( buffer ){
+            
+            FntPrint("%s", buffer);
+            
+        }
+        
+        FntFlush(-1);
+        
+        display();
+
+    }
+    return 0;
+}