auto_switch.h

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#ifndef _AUTO_SWITCH_H_
#define _AUTO_SWITCH_H_
 
#include <source/pdu/main.h>
#include <stdbool.h>
#include <stdint.h>
 
// Static variables
#define SHUNT_R 10000000
#define ADC_MAX 4095
 
// Voltage sense resistors
#define LV_24V_R1  47000 // Ohms
#define LV_24V_R2  3400
#define LV_5V_R1   4300
#define LV_5V_R2   3400
#define LV_3V3_R1  4300
#define LV_3V3_R2  10000
#define AMK_24V_R1 124300
#define AMK_24V_R2 10000
 
// HP Current sense resistors
#define HP_CS_R1 180 // Ohms
#define HP_CS_R2 330 // Ohms
#define HP_CS_R3 500 // Ohms
 
// Upstream Current sense
#define HP_CS_R_SENSE 0.002 // Ohms
#define CS_GAIN       100
 
// Enumeration
typedef enum {
    // High power switches
    SW_PUMP_1,
    SW_PUMP_2,
    SW_SDC,
    SW_HXFAN,
    // High power switches (mux-sensed)
    SW_FAN_1,
    SW_FAN_2,
    SW_FAN_3,
    SW_FAN_4,
    SW_AMK1,
    SW_AMK2,
 
    // Low power switches
    SW_DASH,
    SW_ABOX,
    SW_MAIN,
    SW_DLFR,
    SW_DLBK,
 
    // Not actually switches
    CS_24V,
    CS_5V,
 
    // Number of switches with CS signals (used for array bounds)
    // If switch has a current sense circuit, PLACE IT ABOVE THIS COMMENT
    CS_SWITCH_COUNT,
 
    // Low power switches (no CS)
    SW_BLT,
    // 5V switches (no CS)
    SW_CRIT_5V,
    SW_TV,
    SW_DAQ,
    SW_FAN_5V
} switches_t;
 
// Structures
typedef struct {
    uint16_t in_24v;
    uint16_t out_5v;
    uint16_t out_3v3;
} voltage_t; // Voltage in mV
 
typedef struct {
    uint16_t current[CS_SWITCH_COUNT]; // Current in mA
    voltage_t voltage;
} auto_switches_t;
 
extern auto_switches_t auto_switches;
 
// Function declarations
void setSwitch(switches_t auto_switch_enum, bool state);
 
bool getSwitchStatus(switches_t auto_switch_enum);
 
void autoSwitchPeriodic();
 
void checkSwitchFaults();
 
uint16_t getMuxReading(uint8_t channel);
 
#endif