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/*
* Copyright 2020 Daniel Friesel
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "arch.h"
#include "gio.h"
#include "rti.h"
#ifdef __acweaving
#define __delay_cycles(x)
#endif
void Arch::setup(void)
{
gioInit();
// disable counter blocks
rtiREG1->GCTRL = 0;
// internal clock, RTIUC0 -> RTIFRC0
rtiREG1->TBCTRL = 0;
// no capture sources
rtiREG1->CAPCTRL = 0;
// input source: counter 0 -> compare 0/1, counter 1 -> compare 2/3
rtiREG1->COMPCTRL = 0x00001100U;
// reset up / free running counter 0
rtiREG1->CNT[0].UCx = 0;
rtiREG1->CNT[0].FRCx = 0;
// reset up / free running counter 1
rtiREG1->CNT[1].UCx = 0;
rtiREG1->CNT[1].FRCx = 0;
// free running counter 0 freq = RTICLK/2^32
rtiREG1->CNT[0].CPUCx = 0xffffffffU;
// free running counter 1 freq = RTICLK/2 ( == VCLK/4, see halcogen/system.c)
rtiREG1->CNT[1].CPUCx = 1;
// one interrupt per second
rtiREG1->CMP[2].COMPx = F_CPU/4;
rtiREG1->CMP[2].UDCPx = F_CPU/4;
// clear all pending interrupts
rtiREG1->INTFLAG = 0x0007000FU;
// disable all interrupts
rtiREG1->CLEARINTENA = 0x00070F0FU;
#if defined(CONFIG_loop) || defined(TIMER_S)
rtiEnableNotification(rtiNOTIFICATION_COMPARE2);
#endif
_enable_IRQ();
#if defined(CONFIG_loop) || defined(TIMER_S)
rtiStartCounter(rtiCOUNTER_BLOCK1);
#endif
}
#ifdef CONFIG_wakeup
extern void wakeup();
#endif
#if defined(CONFIG_loop)
extern void loop();
volatile bool run_loop = 0;
#endif
void Arch::delay_us(unsigned int const us)
{
if (us < 10) {
for (unsigned int i = 0; i < us; i++) {
__delay_cycles(F_CPU / 4000000UL);
}
} else {
for (unsigned int i = 0; i < us/10; i++) {
__delay_cycles(F_CPU / 400000UL);
}
}
}
void Arch::delay_ms(unsigned int const ms)
{
for (unsigned int i = 0; i < ms; i++) {
__delay_cycles(F_CPU / 4000UL);
}
}
void Arch::idle_loop(void)
{
while (1) {
#if defined(CONFIG_loop)
if (run_loop) {
loop();
run_loop = 0;
}
#endif
}
}
void Arch::idle(void)
{
#ifdef CONFIG_wakeup
wakeup();
#endif
}
#if defined(CONFIG_loop) || defined(TIMER_S)
#include "driver/uptime.h"
void rtiNotification(uint32 notification)
{
if (notification == rtiNOTIFICATION_COMPARE2) {
#ifdef CONFIG_loop
run_loop = 1;
#endif
#ifdef TIMER_S
uptime.tick_s();
#endif
}
}
#endif
Arch arch;
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