frontend adc stuff

cube/User/Src/frontend.c

@@ -0,0 +1,49 @@
+#include <stdbool.h>
+
+#include <main.h>
+#include <adc.h>
+
+#include <frontend.h>
+
+#include <logger.h>
+
+
+
+static const double SHUNT_RESISTOR = 20.0;
+static const double U_REF = 3.3;
+static const double I_THRESHOLD = 0.005;
+static const uint16_t N_MAX = 4095;
+
+
+
+static volatile uint16_t frontendAdcThreshold = 0;
+static volatile bool frontendEnabled = false;
+
+
+void frontendInit() {
+    double u_threshold = I_THRESHOLD * SHUNT_RESISTOR;
+    frontendAdcThreshold = (uint16_t) (u_threshold / U_REF * ((double) N_MAX));
+    logMsg("frontendInit, threshold calculated: %d", frontendAdcThreshold);
+
+    HAL_ADCEx_Calibration_Start(&frontendAdc);
+    logMsg("frontendInit, calibration done");
+    HAL_ADC_Start_IT(&frontendAdc);
+    logMsg("frontendInit, adc started");
+}
+
+void frontendSetThreshold(uint16_t threshold) {
+    frontendAdcThreshold = threshold;
+}
+
+void frontendEnable() {
+    frontendEnabled = true;
+}
+
+void frontendDisable() {
+    frontendEnabled = false;
+}
+
+void frontendAdcCallback(ADC_HandleTypeDef* hadc) {
+    uint16_t rawValue = HAL_ADC_GetValue(hadc);
+
+}