GTM TIMER 如何启动？

#include "User_program.h"

#include "FreeRTOS.h"
#include "openamp/open_amp.h"
#include "platform_info.h"
#include "rsc_table.h"

void g_timer0_callback(timer_callback_args_t *p_args)
{
        LPRINTF("g_timer0_callback is running--- \n");

}

/* User task Thread entry function */
/* pvParameters contains TaskHandle_t */
void User_program_entry(void *pvParameters) {
        FSP_PARAMETER_NOT_USED(pvParameters);

        /* TODO: add your own code here */
        LPRINTF("User program is running--- \n");

        fsp_err_t err = FSP_SUCCESS;
            /* Initializes the module. */
            err = R_GTM_Open(&g_timer0_ctrl, &g_timer0_cfg);
            /* Handle any errors. This function should be defined by the user. */
            assert(FSP_SUCCESS == err);
            /* Start the timer. */
            (void) R_GTM_Start(&g_timer0_ctrl);

            /* (Optional) Stop the timer. */
            //(void) R_GTM_Stop(&g_timer_ctrl);

        while (1) {
                vTaskDelay(1);
        }
}

CM33 运行后 定时器中断不执行