3908a7f583
Schedules tasks in the main loop using coroutines so that long running tasks, particularly relating to the UI, can yield execution in order to call the poll functions at a tighter interval.
95 lines
1.4 KiB
C++
95 lines
1.4 KiB
C++
#include "scheduler.h"
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#include <stdio.h>
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#include "libco.h"
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#include "menu.h"
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#include "user_io.h"
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#include "input.h"
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#include "fpga_io.h"
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static cothread_t co_scheduler = nullptr;
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static cothread_t co_poll = nullptr;
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static cothread_t co_ui = nullptr;
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static cothread_t co_last = nullptr;
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static void scheduler_wait_fpga_ready(void)
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{
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while (!is_fpga_ready(1))
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{
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printf("FPGA is not ready. JTAG uploading?\n");
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printf("Waiting for FPGA to be ready...\n");
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//enable reset in advance
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fpga_core_reset(1);
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while (!is_fpga_ready(0))
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{
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sleep(1);
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}
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reboot(0);
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}
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}
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static void scheduler_co_poll(void)
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{
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for (;;)
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{
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scheduler_wait_fpga_ready();
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user_io_poll();
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input_poll(0);
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scheduler_yield();
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}
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}
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static void scheduler_co_ui(void)
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{
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for (;;)
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{
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HandleUI();
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scheduler_yield();
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}
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}
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static void scheduler_schedule(void)
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{
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if (co_last == co_poll)
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{
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co_last = co_ui;
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co_switch(co_ui);
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}
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else
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{
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co_last = co_poll;
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co_switch(co_poll);
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}
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}
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void scheduler_init(void)
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{
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const unsigned int co_stack_size = 262144 * sizeof(void*);
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co_poll = co_create(co_stack_size, scheduler_co_poll);
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co_ui = co_create(co_stack_size, scheduler_co_ui);
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}
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void scheduler_run(void)
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{
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co_scheduler = co_active();
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for (;;)
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{
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scheduler_schedule();
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}
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co_delete(co_ui);
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co_delete(co_poll);
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co_delete(co_scheduler);
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}
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void scheduler_yield(void)
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{
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co_switch(co_scheduler);
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}
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