PRU_INTC_HMR
val = pruss_intc_read_reg(intc, PRU_INTC_HMR(idx));
pruss_intc_write_reg(intc, PRU_INTC_HMR(idx), val);
pruss_intc_read_reg(intc, PRU_INTC_HMR(idx)));
pruss_intc_write_reg(intc, PRU_INTC_HMR(i), 0);