From 68e21103e09c7a59292485ab805683760b86e6ba Mon Sep 17 00:00:00 2001
From: Xavi Del Campo <xavi.dcr@tutanota.com>
Date: Sun, 8 Mar 2020 17:23:03 +0100
Subject: Implemented message protocol, not tested yet

---
 src/Serial.c | 42 +++++++++++++++++++-----------------------
 1 file changed, 19 insertions(+), 23 deletions(-)

(limited to 'src/Serial.c')

diff --git a/src/Serial.c b/src/Serial.c
index f91f168..10bb90f 100644
--- a/src/Serial.c
+++ b/src/Serial.c
@@ -6,38 +6,29 @@
 #include <psxbios.h>
 #include <psx.h>
 #include <stddef.h>
+#include "reception.h"
 
-enum
-{
-    FIFO_SZ = 128
-};
-
-typedef volatile struct
-{
-    unsigned char buf[FIFO_SZ];
-    size_t pending, processed;
-    bool full;
-} fifo;
-
-static fifo rx;
+fifo rx;
 
-void sio_handler_callback(void)
+static void sio_handler_callback(void)
 {
     while (SIOCheckInBuffer())
     {
         const unsigned char in = SIOReadByte();
         size_t aux = rx.pending;
 
-        if (++aux >= (sizeof rx.buf / sizeof *rx.buf))
+        if (++aux >= sizeof rx.buf / sizeof *rx.buf)
             aux = 0;
 
         if (aux != rx.processed)
         {
             rx.buf[aux] = in;
-            rx.pending = rx.processed;
+            rx.pending = aux;
+            reception_ev();
         }
         else
         {
+            printf("fifo full\n");
             rx.full = true;
         }
     }
@@ -78,22 +69,27 @@ void SerialInit(void)
     };
 
     const int not_crit = EnterCriticalSection();
-    void sio_handler(void);
+
+    EnterCriticalSection();
 
     SIOReset();
     SIOStart(BAUD_RATE);
 
-    const int sio_handle = OpenEvent(SIO_CLASS, SPEC_GENERAL_INTERRUPT, TRIGGER_CALLBACK, sio_handler);
+    IMASK |= 1 << INT_SIO;
 
-    if (sio_handle != 0xFFFFFFFF)
-        EnableEvent(sio_handle);
+    void sio_handler(void);
+    const int sio_handle = OpenEvent(SIO_CLASS, SPEC_GENERAL_INTERRUPT, TRIGGER_CALLBACK, sio_handler_callback);
 
-    IMASK |= 1 << INT_SIO;
+    if (sio_handle != -1)
+        EnableEvent(sio_handle);
 
     SIOEnableRXInterrupt();
 
     if (not_crit)
-    {
         ExitCriticalSection();
-    }
+}
+
+void SerialWrite(const unsigned char byte)
+{
+    SIOSendByte(byte);
 }
-- 
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