Beginning of cross platform support

SHAL/Src/STM32L4XX/Peripheral/Timer/SHAL_TIM.cpp

@@ -0,0 +1,63 @@
+//
+// Created by Luca on 8/28/2025.
+//
+
+#include "SHAL_TIM.h"
+#include <cassert>
+
+Timer::Timer(Timer_Key t) : TIMER_KEY(t){
+
+}
+
+Timer::Timer() : TIMER_KEY(Timer_Key::S_TIM_INVALID){
+
+}
+
+void Timer::start() {
+    getTimerRegister(TIMER_KEY)->CR1 |= TIM_CR1_CEN;
+    getTimerRegister(TIMER_KEY)->EGR |= TIM_EGR_UG; //load prescaler reg and ARR
+    enableInterrupt();
+}
+
+void Timer::stop() {
+    getTimerRegister(TIMER_KEY)->CR1 &= ~TIM_CR1_CEN;
+}
+
+void Timer::setPrescaler(uint16_t presc) {
+    getTimerRegister(TIMER_KEY)->PSC = presc;
+}
+
+void Timer::setARR(uint16_t arr) {
+    getTimerRegister(TIMER_KEY)->ARR = arr;
+}
+
+void Timer::enableInterrupt() {
+    getTimerRegister(TIMER_KEY)->DIER |= TIM_DIER_UIE;
+    NVIC_EnableIRQ(getIRQn(TIMER_KEY));
+}
+
+void Timer::init(uint32_t prescaler, uint32_t autoReload) {
+    TIM_RCC_Enable rcc = getTimerRCC(TIMER_KEY);
+    *rcc.busEnableReg |= (1 << rcc.offset);
+
+    setPrescaler(prescaler);
+    setARR(autoReload);
+}
+
+
+Timer &TimerManager::get(Timer_Key timer_key) {
+
+    //Ensure that we don't try to get invalid timers
+    assert(timer_key != Timer_Key::S_TIM_INVALID && timer_key != Timer_Key::NUM_TIMERS);
+
+    Timer& selected = timers[static_cast<int>(timer_key)];
+
+    //Timer queried is not initialized yet (defaults to invalid)
+    if(selected.TIMER_KEY == Timer_Key::S_TIM_INVALID){
+        timers[static_cast<int>(timer_key)] = Timer(timer_key); //Initialize TIMER_KEY
+    }
+
+    return timers[static_cast<int>(timer_key)];
+}
+
+