main.c

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#include <stdint.h>
 
#include "ra8_boot_entry.h"
#include "ra8_cgc.h"
#include "ra8_dual_core.h"
#include "ra8_err.h"
#include "ra8_log.h"

extern uint32_t g_ra8_ls_cpu1_mram_start;
extern uint32_t g_ra8_ls_cpu1_stack_top;

[[noreturn]] static void park_forever(void)
{
  while (1) {
    __asm volatile("nop");
  }
}

[[noreturn]] static void idle_forever(void)
{
  while (1) {
    __asm volatile("wfi");
  }
}

void main(void)
{
  /* Publish the clock tree the released M33 shares BEFORE logging comes up --
   * the console derives its baud from PCLKA, so bringing the clock up second
   * would fix the baud against the reset clocks. Best-effort: a failure only
   * changes the busy-loop cadence, not the correctness of the blink, so the
   * verdict is carried forward and narrated once logging is available. */
  const ra8_err_t clk_err = ra8_cgc_init();
 
  ra8_log_init();
  ra8_log_info("M85", "==== RA8D2 dual-core blink (HAL PCNTR primitive) ====");
  ra8_log_info("M85", "Cortex-M85 primary core online");
  if (clk_err != k_ra8_ok) {
    ra8_log_info("M85", "clock init failed -- continuing at reset clocks");
  }
 
  ra8_log_info("M85", "releasing Cortex-M33 secondary core ...");
  const ra8_err_t err = ra8_cpu1_release(&g_ra8_ls_cpu1_mram_start, &g_ra8_ls_cpu1_stack_top);
  ra8_log_info_val("M85", "ra8_cpu1_release rc (0 = ok)", (uint32_t)err);
  if (err != k_ra8_ok) {
    ra8_log_info("M85", "release FAILED -- halting");
    park_forever();
  }
 
  ra8_log_info("M85", "M33 released -- it now blinks LED1 via ra8_pcntr_set_output()");
  ra8_log_info("M85", "M85 entering WFI idle -- low-power co-processor model");
  idle_forever();
}