opamp.h

#pragma once
 
/************************************************************************************************
 * @file   opamp.h
 *
 * @brief  OPAMP Library Header - Internal Op-Amp Driver for STM32L433
 *
 * @date   2025-01-30
 * @author Midnight Sun Team #24 - MSXVI
 ************************************************************************************************/
 
/* Standard library Headers */
#include <stdbool.h>
#include <stdint.h>
 
/* Inter-component Headers */
 
/* Intra-component Headers */
#include "status.h"
 
typedef enum {
  OPAMP_1 = 0, 
  NUM_OPAMP_INSTANCES
} OpampInstance;
 
typedef enum {
  OPAMP_NONINVERTING_IO0 = 0, 
  OPAMP_NONINVERTING_DAC,     
} OpampNonInvertingInput;
 
typedef enum {
  OPAMP_INVERTING_IO0 = 0,  
  OPAMP_INVERTING_IO1,      
  OPAMP_INVERTING_PGA,      
  OPAMP_INVERTING_FOLLOWER, 
} OpampInvertingInput;
 
typedef enum {
  OPAMP_PROGRAMMABLE_GAIN_2 = 0,        
  OPAMP_PROGRAMMABLE_GAIN_4,            
  OPAMP_PROGRAMMABLE_GAIN_8,            
  OPAMP_PROGRAMMABLE_GAIN_16,           
  OPAMP_PROGRAMMABLE_GAIN_2_INVERTING,  
  OPAMP_PROGRAMMABLE_GAIN_4_INVERTING,  
  OPAMP_PROGRAMMABLE_GAIN_8_INVERTING,  
  OPAMP_PROGRAMMABLE_GAIN_16_INVERTING, 
} OpampProgrammableGain;
 
typedef struct {
  OpampNonInvertingInput vinp_sel; 
  OpampInvertingInput vinm_sel;    
  OpampProgrammableGain pga_gain;  
  bool output_to_adc;              
} OpampConfig;
 
StatusCode opamp_init(void);
 
StatusCode opamp_configure(OpampInstance instance, OpampConfig *config);
 
StatusCode opamp_start(OpampInstance instance);
 
StatusCode opamp_stop(OpampInstance instance);