Fábio Coutada
98ed638f3c
All uncommitted work from ESP32 GDB stub development session. Includes: - GDB stub (uos_gdbstub.c/.h/_entry.S) - Startup vector table rewrite - ESP32 HAL integration files - Boot chain design docs - AGENTS.md absolute rules (commit before refactor, no unauthorized changes) - All prior deepseek session work This commit prevents further data loss. No claims of correctness.
100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
/*
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* UniversalisOS ESP32 — 2-Task Demo
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*
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* Task A prints "A0\n" through "A9\n"
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* Task B prints "B0\n" through "B9\n"
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* Alternating via semaphore. Co-routine pattern.
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*
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* Build: make TARGET=esp32hw
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* Load: U-Boot auto-boot (jumps to entry point)
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*/
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#include "uos_api.h"
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#include "uos_hal.h"
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/* ---- Task stacks (static allocation, Tier 0) ---- */
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UOS_TASK_DEF(task_a, 1, 1024);
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UOS_TASK_DEF(task_b, 1, 1024);
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/* ---- Semaphore for alternating ---- */
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UOS_SEM_DEF(sync_a);
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UOS_SEM_DEF(sync_b);
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/* ---- Shared counter ---- */
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static volatile int s_counter = 0;
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/* ---- Task A entry ---- */
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static void task_a_entry(void *arg)
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{
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(void)arg;
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while (s_counter < 10) {
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uos_sem_wait(&sync_a_sem, UOS_WAIT_FOREVER);
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uos_hal_uart_putc('A');
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uos_hal_uart_putc('0' + s_counter);
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uos_hal_uart_putc('\n');
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s_counter++;
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uos_sem_post(&sync_b_sem);
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}
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/* Task A done — signal B one last time and exit */
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uos_sem_post(&sync_b_sem);
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uos_task_delete(NULL); /* delete self */
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}
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/* ---- Task B entry ---- */
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static void task_b_entry(void *arg)
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{
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(void)arg;
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while (s_counter < 10) {
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uos_sem_wait(&sync_b_sem, UOS_WAIT_FOREVER);
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if (s_counter >= 10) break;
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uos_hal_uart_putc('B');
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uos_hal_uart_putc('0' + s_counter);
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uos_hal_uart_putc('\n');
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uos_sem_post(&sync_a_sem);
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}
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uos_hal_uart_puts("DONE\n");
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/* Infinite idle — keep running */
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for (;;) {
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__asm__ volatile("waiti 0");
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}
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}
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/* ---- Main entry (called by startup) ---- */
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int main(void)
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{
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/* 1. Early hardware init */
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uos_hal_wdt_disable_all();
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uos_hal_uart_init(115200);
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uos_hal_uart_puts("UOS ESP32 2-Task Demo\n");
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/* 2. Initialize kernel */
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uos_init();
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/* 3. Create synchronization semaphores */
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uos_sem_init(&sync_a_sem, "sync_a", 1); /* Task A starts first */
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uos_sem_init(&sync_b_sem, "sync_b", 0);
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/* 4. Create tasks */
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uos_task_create("task_a", 1, task_a_entry, NULL,
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task_a_stack_mem, sizeof(task_a_stack_mem));
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uos_task_create("task_b", 1, task_b_entry, NULL,
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task_b_stack_mem, sizeof(task_b_stack_mem));
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/* Suppress unused-variable warnings for static task structs */
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(void)&task_a_task; (void)&task_b_task;
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/* 5. Start scheduler — never returns */
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uos_hal_uart_puts("Starting scheduler...\n");
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uos_sched_start();
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/* NOTREACHED */
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for (;;) __asm__ volatile("waiti 0");
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return 0;
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}
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