# HG changeset patch
# User Ethan Zonca <ez@ethanzonca.com>
# Date 2015-08-23 19:25:58
# Node ID b77b97fa501d55212fd357486de207643887927b
# Parent  a76c60e8cc43a5ed19276fb9b732834cd16733ad

Add max31865 register defs

diff --git a/max31865.c b/max31865.c
--- a/max31865.c
+++ b/max31865.c
@@ -5,13 +5,48 @@
 #include "states.h"
 #include "gpio.h"
 
+
+// Registers
+#define MAX31855_REG_CONFIG 0x00
+#define MAX31855_REG_RTD_MSB 0x01
+#define MAX31855_REG_RTD_LSB 0x02
+#define MAX31855_REG_HFAULT_THRESH_MSB 0x03
+#define MAX31855_REG_HFAULT_THRESH_LSB 0x04
+#define MAX31855_REG_LFAULT_THRESH_MSB 0x05
+#define MAX31855_REG_LFAULT_THRESH_LSB 0x06
+#define MAX31855_REG_FAULTSTATUS 0x07
+
+#define MAX31855_REGWRITEMODIFIER 0x80
+
+// Fields 
+#define MAX31865_CONF_VBIAS (1<<7)
+#define MAX31865_CONF_CONVMODE (1<<6)
+#define MAX31865_CONF_1SHOT (1<<5)
+#define MAX31865_CONF_3WIRE (1<<4)
+
+#define MAX31865_CONF_FAULT_NOACTION    0b0000
+#define MAX31865_CONF_FAULT_AUTODELAY   0b0100
+#define MAX31865_CONF_FAULT_MANUALELAY1 0b1000
+#define MAX31865_CONF_FAULT_MANUALELAY2 0b1100
+
+#define MAX31865_CONF_FAULT_CLEAR (1<<1)
+#define MAX31865_CONF_50_60HZ_FILTER (1<<0)
+
+
 // Grab temperature reading from MAX31865
 void max31865_readtemp(SPI_HandleTypeDef* hspi1, therm_settings_t* set, therm_status_t* status)
 {
-    // ** FIXME ** FIXME ** FIXME ** //
+    ///////////////////////////////////
     // This is duplicated from MAX31855, update for MAX31865 registers/etc
     /////////////////////////////////// 
 
+    // TODO: Set configuration register based on params in config.h (2-wire, 4-wire, etc RTD). This is register 0x00.
+        // 2-wire RTC or 2-wire (duh) NTC thermistor will be the only options
+        // Need option for resistance of RTD
+        // These options should be stored in the set structure and should be menu-selectable
+    // TODO: Read RTD msbs (0x01)
+    // TODO: Read RTD LSBs (0x02)
+
     // Assert CS
     HAL_GPIO_WritePin(MAX_CS, 0);