main.c

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#include <stdint.h>
 
#include "ra8_attributes.h"
#include "ra8_board_ek_ra8d2.h"
#include "ra8_boot_entry.h"
#include "ra8_cgc.h"
#include "ra8_err.h"
#include "ra8_isr.h"
#include "ra8_time.h"

typedef enum : uint32_t {
  k_uart_hello_baud      = 115200U, 
  k_uart_hello_period_ms = 1000U,   
} uart_hello_config_t;

static const uint8_t s_uart_hello_greeting[] = "hello, ra8d2!\r\n";

RA8_INTERNAL static void internal_uart_hello_panic_halt(void)
{
  while (1) {
    __asm__ volatile("wfi");
  }
}

RA8_INTERNAL static void internal_uart_hello_setup_or_halt(void)
{
  uint32_t cpuclk0_hz = 0U;
 
  if (ra8_cgc_init() != k_ra8_ok) {
    internal_uart_hello_panic_halt();
  }
  if (ra8_cgc_get_clock_hz(k_ra8_clock_id_cpuclk0, &cpuclk0_hz) != k_ra8_ok) {
    internal_uart_hello_panic_halt();
  }
  if (ra8_time_init(cpuclk0_hz) != k_ra8_ok) {
    internal_uart_hello_panic_halt();
  }
  if (ra8_board_uart_console_init((uint32_t)k_uart_hello_baud) != k_ra8_ok) {
    internal_uart_hello_panic_halt();
  }
  if (ra8_board_led_init(k_ra8_board_led1) != k_ra8_ok) {
    internal_uart_hello_panic_halt();
  }
}

void main(void)
{
  internal_uart_hello_setup_or_halt();
 
  ra8_isr_globals_enable();
 
  while (1) {
    (void)ra8_board_uart_console_write(s_uart_hello_greeting,
                                       (size_t)(sizeof(s_uart_hello_greeting) - 1U));
    if (ra8_board_led_toggle(k_ra8_board_led1) != k_ra8_ok) {
      break;
    }
    ra8_delay_ms(k_uart_hello_period_ms);
  }
 
  internal_uart_hello_panic_halt();
}