From 585a656d2e9bf0c6158bff436d4575ce7644dab3 Mon Sep 17 00:00:00 2001
From: Larry Bank <bitbank@pobox.com>
Date: Wed, 30 Apr 2025 22:55:53 +0100
Subject: [PATCH] Added missing IO functions for Linux/RPI

---
 rpi/rpi_io.inl | 22 ++++++++++++++++++++++
 src/bb_ep.inl  |  2 ++
 2 files changed, 24 insertions(+)

diff --git a/rpi/rpi_io.inl b/rpi/rpi_io.inl
index e7c86fb..cdc62e1 100644
--- a/rpi/rpi_io.inl
+++ b/rpi/rpi_io.inl
@@ -86,6 +86,17 @@ void delay(int iMS)
   usleep(iMS * 1000);
 } /* delay() */
 
+long millis(void)
+{
+int iTime;
+struct timespec res;
+
+    clock_gettime(CLOCK_MONOTONIC, &res);
+    iTime = 1000*res.tv_sec + res.tv_nsec/1000000;
+
+    return (long)iTime;
+} /* millis() */
+
 static void delayMicroseconds(int iMS)
 {
   usleep(iMS);
@@ -133,6 +144,17 @@ void bbepCMD2(BBEPDISP *pBBEP, uint8_t cmd1, uint8_t cmd2)
     digitalWrite(pBBEP->iCSPin, HIGH);
     digitalWrite(pBBEP->iDCPin, HIGH); // leave data mode as the default
 } /* bbepCMD2() */
+//
+// Set the second CS pin for dual-controller displays
+//
+void bbepSetCS2(BBEPDISP *pBBEP, uint8_t cs)
+{
+    pBBEP->iCS1Pin = pBBEP->iCSPin;
+    pBBEP->iCS2Pin = cs;
+    pinMode(cs, OUTPUT);
+    digitalWrite(cs, HIGH); // disable second CS for now
+} /* bbepSetCS2() */
+
 //
 // Write a single byte as a COMMAND (D/C set low)
 //
diff --git a/src/bb_ep.inl b/src/bb_ep.inl
index 77c03d6..de6e360 100644
--- a/src/bb_ep.inl
+++ b/src/bb_ep.inl
@@ -1639,6 +1639,7 @@ void bbepSetAddrWindow(BBEPDISP *pBBEP, int x, int y, int cx, int cy)
     if (!pBBEP) return;
     if (pBBEP->iFlags & (BBEP_4COLOR | BBEP_7COLOR)) return;
     
+#ifdef FUTURE
     if (pBBEP->chip_type == BBEP_CHIP_IT8951) {
         uint16_t u16Temp[6];
         u16Temp[0] = 0; // DEBUG (_endian_type << 8 | _pix_bpp << 4 | _rotate);
@@ -1649,6 +1650,7 @@ void bbepSetAddrWindow(BBEPDISP *pBBEP, int x, int y, int cx, int cy)
         bbepWriteIT8951CmdArgs(pBBEP, IT8951_TCON_LD_IMG_AREA, u16Temp, 5);
         return;
     }
+#endif
     tx = x/8; // round down to next lower byte
     ty = y;
     cx = (cx + 7) & 0xfff8; // make width an even number of bytes