usba_2.h

Go to the documentation of this file.

 
/* This file is part of the HWA project.
 * Copyright (c) 2017 Christophe Duparquet.
 * All rights reserved. Read LICENSE.TXT for details.
 */
 
#define hw_write_usbprescaler           , _hw_wrusbpsc
#define hwa_write_usbprescaler          , _hwa_wrusbpsc
 
#define _hw_wrusbpsc(i,a,v,g,...)       HW_B(_hwx_wrusbpsc1_,g)(_hw,v,g)
#define _hwa_wrusbpsc(i,a,v,g,...)      HW_B(_hwx_wrusbpsc1_,g)(_hwa,v,g)
 
/*  Can not check that 'v' is not void since the preprocessor does not accept to
 *  concatenate '1.5'. Let's do it another way.
 */
#define _hwx_wrusbpsc1_0(h,v,g)         HW_E(HW_EM_G(g))
#define _hwx_wrusbpsc1_1(h,v,g)                         \
  do{                                                   \
    if      (v-1+1==  1) h##_write(rcc,usbpre,1);       \
    else if (v-1+1==1.5) h##_write(rcc,usbpre,0);       \
    else HWA_E(HW_EM_VL(v,(1, 1.5)));                   \
  }while(0)