From 55165a7908a1a7f18c7630adad96962397644c23 Mon Sep 17 00:00:00 2001
From: Luc <luc.lebosse@tech-hunters.com>
Date: Thu, 29 Aug 2019 16:25:17 +0200
Subject: [PATCH] Add SPI pin customization support

---
 Grbl_Esp32/cpu_map.h   | 8 ++++++++
 Grbl_Esp32/grbl.h      | 2 +-
 Grbl_Esp32/grbl_sd.cpp | 2 +-
 Grbl_Esp32/system.cpp  | 4 ++++
 4 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/Grbl_Esp32/cpu_map.h b/Grbl_Esp32/cpu_map.h
index de56ae2f5..001750f18 100644
--- a/Grbl_Esp32/cpu_map.h
+++ b/Grbl_Esp32/cpu_map.h
@@ -36,6 +36,14 @@
 	
 	*/
 		
+//Set your pine definition 
+//let -1 to use default board pin
+#define GRBL_SPI_SS -1
+#define GRBL_SPI_MOSI -1
+#define GRBL_SPI_MIS0 -1
+#define GRBL_SPI_SCK -1
+//Set you frequency 
+#define GRBL_SPI_FREQ  4000000
 
 #ifdef CPU_MAP_ESP32
 	// This is the CPU Map for the ESP32 CNC Controller R2	
diff --git a/Grbl_Esp32/grbl.h b/Grbl_Esp32/grbl.h
index b78a1e7e5..586286b27 100644
--- a/Grbl_Esp32/grbl.h
+++ b/Grbl_Esp32/grbl.h
@@ -20,7 +20,7 @@
 
 // Grbl versioning system
 #define GRBL_VERSION "1.1f"
-#define GRBL_VERSION_BUILD "20190708"
+#define GRBL_VERSION_BUILD "20190829"
 
 //#include <sdkconfig.h>
 #include <Arduino.h>
diff --git a/Grbl_Esp32/grbl_sd.cpp b/Grbl_Esp32/grbl_sd.cpp
index 550bb2468..a843dc1bb 100644
--- a/Grbl_Esp32/grbl_sd.cpp
+++ b/Grbl_Esp32/grbl_sd.cpp
@@ -200,7 +200,7 @@ uint8_t get_sd_state(bool refresh)
     sd_state = SDCARD_NOT_PRESENT;
     //using default value for speed ? should be parameter
     //refresh content if card was removed
-    if (SD.begin()) {
+    if (SD.begin((GRBL_SPI_SS == -1)?SS:GRBL_SPI_SS, SPI, GRBL_SPI_FREQ)) {
       if ( SD.cardSize() > 0 )sd_state = SDCARD_IDLE;
     }
   return sd_state;
diff --git a/Grbl_Esp32/system.cpp b/Grbl_Esp32/system.cpp
index f842f3f64..a2ce3245b 100644
--- a/Grbl_Esp32/system.cpp
+++ b/Grbl_Esp32/system.cpp
@@ -44,6 +44,10 @@ void system_ini() // Renamed from system_init() due to conflict with esp32 files
 	#endif
 
 #endif
+   //customize pin definition if needed
+#if (GRBL_SPI_SS != -1) || (GRBL_SPI_MIS0 != -1) || (GRBL_SPI_MOSI != -1) || (GRBL_SPI_SCK != -1)
+    SPI.begin(GRBL_SPI_SCK, GRBL_SPI_MIS0, GRBL_SPI_MOSI, GRBL_SPI_SS);
+#endif 
 }
 
 void IRAM_ATTR isr_control_inputs()