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r65emu/timed.cpp

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#include <Arduino.h>
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#if defined(__LM4F120H5QR__)
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#include <inc/hw_ints.h>
#include <driverlib/interrupt.h>
#include <driverlib/sysctl.h>
#include <driverlib/timer.h>
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#endif
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#include "timed.h"
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#if defined(__LM4F120H5QR__)
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static void (*client_handler)(void);
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static void timer0isr(void) {
ROM_TimerIntClear(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
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client_handler();
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}
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void timer_create(unsigned freq, void (*handler)(void)) {
client_handler = handler;
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ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);
ROM_TimerConfigure(TIMER0_BASE, TIMER_CFG_PERIODIC);
TimerIntRegister(TIMER0_BASE, TIMER_A, timer0isr);
ROM_TimerEnable(TIMER0_BASE, TIMER_A);
ROM_IntEnable(INT_TIMER0A);
ROM_TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
ROM_TimerLoadSet(TIMER0_BASE, TIMER_A, ROM_SysCtlClockGet() / freq);
}
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#elif defined(ESP_PLATFORM)
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void timer_create(unsigned freq, void (*handler)(void)) {
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hw_timer_t *timer = timerBegin(3, 80, true); // prescaler of 80
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timerAttachInterrupt(timer, handler, true);
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timerAlarmWrite(timer, 1000000 / freq, true);
timerAlarmEnable(timer);
}
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#endif