L6470 SPI daisy chain support (#12895)

Marlin/Configuration_adv.h

@@ -1509,62 +1509,121 @@
 /**
  * L6470 Stepper Driver options
  *
- * The Arduino-L6470 library is required for this stepper driver.
+ * Arduino-L6470 library (0.7.0 or higher) is required for this stepper driver.
  * https://github.com/ameyer/Arduino-L6470
+ *
+ * Requires the following to be defined in your pins_YOUR_BOARD file
+ *     L6470_CHAIN_SCK_PIN
+ *     L6470_CHAIN_MISO_PIN
+ *     L6470_CHAIN_MOSI_PIN
+ *     L6470_CHAIN_SS_PIN
+ *     L6470_RESET_CHAIN_PIN  (optional)
  */
 #if HAS_DRIVER(L6470)
 
-  #define X_MICROSTEPS        16 // number of microsteps
-  #define X_OVERCURRENT     2000 // maxc current in mA. If the current goes over this value, the driver will switch off
-  #define X_STALLCURRENT    1500 // current in mA where the driver will detect a stall
+  #define X_MICROSTEPS       128 // number of microsteps (VALID: 1, 2, 4, 8, 16, 32, 128 & 128)
+  #define X_OVERCURRENT     2000 // current in mA where the driver will detect an over current (VALID: 375 x (1 - 16) - 6A max - rounds down)
+  #define X_STALLCURRENT    1500 // current in mA where the driver will detect a stall (VALID: 31.25 * (1-128) -  4A max - rounds down)
+  #define X_MAX_VOLTAGE      127 // 0-255, max effective voltage seen by stepper
+  #define X_CHAIN_POS          0 // position in SPI chain, 0 - not in chain, 1- nearest MOSI
 
-  #define X2_MICROSTEPS       16
+  #define X2_MICROSTEPS      128
   #define X2_OVERCURRENT    2000
   #define X2_STALLCURRENT   1500
+  #define X2_MAX_VOLTAGE     127
+  #define X2_CHAIN_POS         0
 
-  #define Y_MICROSTEPS        16
+  #define Y_MICROSTEPS       128
   #define Y_OVERCURRENT     2000
   #define Y_STALLCURRENT    1500
+  #define Y_MAX_VOLTAGE      127
+  #define Y_CHAIN_POS          0
 
-  #define Y2_MICROSTEPS       16
+  #define Y2_MICROSTEPS      128
   #define Y2_OVERCURRENT    2000
   #define Y2_STALLCURRENT   1500
+  #define Y2_MAX_VOLTAGE     127
+  #define Y2_CHAIN_POS         0
 
-  #define Z_MICROSTEPS        16
+  #define Z_MICROSTEPS       128
   #define Z_OVERCURRENT     2000
   #define Z_STALLCURRENT    1500
+  #define Z_MAX_VOLTAGE      127
+  #define Z_CHAIN_POS          0
 
-  #define Z2_MICROSTEPS       16
+  #define Z2_MICROSTEPS      128
   #define Z2_OVERCURRENT    2000
   #define Z2_STALLCURRENT   1500
+  #define Z2_MAX_VOLTAGE     127
+  #define Z2_CHAIN_POS         0
 
-  #define Z3_MICROSTEPS       16
+  #define Z3_MICROSTEPS      128
   #define Z3_OVERCURRENT    2000
   #define Z3_STALLCURRENT   1500
+  #define Z3_MAX_VOLTAGE     127
+  #define Z3_CHAIN_POS         0
 
-  #define E0_MICROSTEPS       16
+  #define E0_MICROSTEPS      128
   #define E0_OVERCURRENT    2000
   #define E0_STALLCURRENT   1500
+  #define E0_MAX_VOLTAGE     127
+  #define E0_CHAIN_POS         0
 
-  #define E1_MICROSTEPS       16
+  #define E1_MICROSTEPS      128
   #define E1_OVERCURRENT    2000
   #define E1_STALLCURRENT   1500
+  #define E1_MAX_VOLTAGE     127
+  #define E1_CHAIN_POS         0
 
-  #define E2_MICROSTEPS       16
+  #define E2_MICROSTEPS      128
   #define E2_OVERCURRENT    2000
   #define E2_STALLCURRENT   1500
+  #define E2_MAX_VOLTAGE     127
+  #define E2_CHAIN_POS         0
 
-  #define E3_MICROSTEPS       16
+  #define E3_MICROSTEPS      128
   #define E3_OVERCURRENT    2000
   #define E3_STALLCURRENT   1500
+  #define E3_MAX_VOLTAGE     127
+  #define E3_CHAIN_POS         0
 
-  #define E4_MICROSTEPS       16
+  #define E4_MICROSTEPS      128
   #define E4_OVERCURRENT    2000
   #define E4_STALLCURRENT   1500
+  #define E4_MAX_VOLTAGE     127
+  #define E4_CHAIN_POS         0
 
-  #define E5_MICROSTEPS       16
+  #define E5_MICROSTEPS      128
   #define E5_OVERCURRENT    2000
   #define E5_STALLCURRENT   1500
+  #define E5_MAX_VOLTAGE     127
+  #define E5_CHAIN_POS         0
+
+
+  /**
+    * Monitor L6470 drivers for error conditions like over temperature and over current.
+    * In the case of over temperature Marlin can decrease the drive until the error condition clears.
+    * Other detected conditions can be used to stop the current print.
+    * Relevant g-codes:
+    * M906 - I1/2/3/4/5  Set or get motor drive level using axis codes X, Y, Z, E. Report values if no axis codes given.
+    *         I not present or I0 or I1 - X, Y, Z or E0
+    *         I2 - X2, Y2, Z2 or E1
+    *         I3 - Z3 or E3
+    *         I4 - E4
+    *         I5 - E5
+    * M916 - Increase drive level until get thermal warning
+    * M917 - Find minimum current thresholds
+    * M918 - Increase speed until max or error
+    * M122 S0/1 - Report driver parameters
+  */
+  //#define MONITOR_L6470_DRIVER_STATUS
+
+  #if ENABLED(MONITOR_L6470_DRIVER_STATUS)
+    #define KVAL_HOLD_STEP_DOWN     1
+    //#define L6470_STOP_ON_ERROR
+  #endif
+
+  #define L6470_CHITCHAT     // enable display of additional status info
 
 #endif // L6470