diff --git a/Software/Core/Inc/mappings_o.h b/Software/Core/Inc/mappings_o.h
new file mode 100644
index 0000000..4899b60
--- /dev/null
+++ b/Software/Core/Inc/mappings_o.h
@@ -0,0 +1,133 @@
+#ifndef MAPPINGS_H
+#define MAPPINGS_H
+
+#define SN_FRONT
+//#define SN_REAR
+
+#include <stdint.h>
+
+typedef struct {
+    uint8_t en;
+    uint16_t can_id;
+    uint8_t start_bit;
+    char name[16];
+    float scale_factor; // (phys_max/can_scale)/adc_quants
+} adc_ch_tx_cfg_t;
+
+static adc_ch_tx_cfg_t CAN_TX_MAP[16] = {
+/* 0 */ {.en = 1, .can_id = 0xD1, .start_bit = 16, .name = "SAS"     , .scale_factor = ((6.5535/0.0001)/(2^12)) },
+/* 1 */ {.en = 1, .can_id = 0xD2, .start_bit =  0, .name = "APPS1"   , .scale_factor = ((6.5535/0.0001)/(2^12)) },
+/* 2 */ {.en = 0, .can_id = 0x00, .start_bit =  0, .name = "_unused_", .scale_factor = 0 },
+/* 3 */ {.en = 0, .can_id = 0x00, .start_bit =  0, .name = "_unused_", .scale_factor = 0 },
+/* 4 */ {.en = 0, .can_id = 0x00, .start_bit =  0, .name = "_unused_", .scale_factor = 0 },
+/* 5 */ {.en = 0, .can_id = 0x00, .start_bit =  0, .name = "_unused_", .scale_factor = 0 },
+/* 6 */ {.en = 0, .can_id = 0x00, .start_bit =  0, .name = "_unused_", .scale_factor = 0 },
+/* 7 */ {.en = 0, .can_id = 0x00, .start_bit =  0, .name = "_unused_", .scale_factor = 0 },
+/* 8 */ {.en = 1, .can_id = 0xD2, .start_bit = 16, .name = "APPS2"   , .scale_factor = ((6.5535/0.0001)/(2^12)) },
+/* 9 */ {.en = 1, .can_id = 0xD3, .start_bit =  0, .name = "DS FL"   , .scale_factor = ((6.5535/0.0001)/(2^12)) },
+/* A */ {.en = 1, .can_id = 0xD1, .start_bit =  0, .name = "BPS F"   , .scale_factor = ((6.5535/0.0001)/(2^12)) },
+/* ... */
+};
+
+typedef enum {
+    L1 = 0,
+    L2 = 1,
+    L3 = 2,
+    L4 = 3,
+    L5 = 4,
+    L6 = 5,
+    L7 = 6,
+    L8 = 7,
+    R9 = 8,
+    RA = 9,
+    RB = 10,
+    RC = 11,
+    RD = 12,
+    RE = 13,
+    RF = 14,
+    R0 = 15,
+} analog_pin_t;
+
+typedef enum {
+    L9 = 0,
+    LA = 1,
+    LC = 2,
+    R5 = 3,
+    R6 = 4,
+    R7 = 5,
+} digital_pin_t;
+
+typedef enum {
+    LB = 0,
+    R8 = 1,
+} freq_pin_t;
+
+typedef enum {
+    NONE = 0,   // Not used
+    AIN = 1,    // Analog in
+    DIN = 2,    // Digital in
+    FIN = 3,    // Frequency in
+    DOUT = 4,   // Digital out
+    POUT = 5,   // PWM out
+} signal_type_t;
+
+typedef struct {
+    signal_type_t type;
+
+    // CAN INFO
+    uint8_t start;      // start byte
+    uint8_t length;     // in bytes
+    
+    // PERIPHERY INFO
+    uint8_t channel;    // ADC or PWM or Freq channel
+    uint8_t dio_map[8]; // Up to 8 bits mappable to DIOs
+
+    // METADATA
+    //float scale_factor; // (phys_max/can_scale)/adc_quants
+    char name[16];
+} can_signal_t;
+
+typedef struct {
+    uint16_t can_id;
+    uint8_t dlc;
+    uint8_t num_signals;
+    can_signal_t signals[8];
+} can_pkt_t;
+
+#ifdef SN_FRONT
+
+static can_pkt_t CAN_SIGNAL_MAP[4] {
+    {
+        .can_id = 0x0D1, .dlc = 5, .num_signals = 2, .signals = {
+            { .type = AIN, .start = 0, .length = 2, .channel = RB, .name = "BPS F" },
+            { .type = AIN, .start = 2, .length = 2, .channel = L1, .name = "SAS" },
+            { .type = DIN, .start = 4, .length = 1, .dio_map = {L9, LC, R5, R6, R7}, .name = "SAS" }
+        }
+    },
+    {
+        .can_id = 0x0D2, .dlc = 4, .num_signals = 2, .signals = {
+            { .type = AIN, .start = 0, .length = 2, .channel = R9, .name = "APPS 1" },
+            { .type = AIN, .start = 2, .length = 2, .channel = L2, .name = "APPS 2" }
+        }
+    },
+    {
+        .can_id = 0x0D3, .dlc = 8, .num_signals = 4, .signals = {
+            { .type = AIN, .start = 0, .length = 2, .channel = RA, .name = "DS FL" },
+            { .type = AIN, .start = 2, .length = 2, .channel = RC, .name = "DS FR" },
+            { .type = AIN, .start = 4, .length = 2, .channel = RE, .name = "SLS FL" },
+            { .type = AIN, .start = 6, .length = 2, .channel = R0, .name = "SLS FR" }
+        }
+    },
+    {
+        .can_id = 0x0D4, .dlc = 8, .num_signals = 4, .signals = {
+            { .type = AIN, .start = 0, .length = 2, .channel = RD, .name = "BDTS FL" },
+            { .type = AIN, .start = 2, .length = 2, .channel = RF, .name = "BDTS FR" },
+            { .type = FIN, .start = 4, .length = 2, .channel = LB, .name = "WSS FL" },
+            { .type = FIN, .start = 6, .length = 2, .channel = R8, .name = "WSS FR" }
+        }
+    }
+};
+
+#endif
+
+#endif
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