include/fx2macros.h

   1 // Copyright (C) 2009 Ubixum, Inc.
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Lesser General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2.1 of the License, or (at your option) any later version.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Lesser General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU Lesser General Public
  14 // License along with this library; if not, write to the Free Software
  15 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  16
  17 /*! \file
  18  *  Macros for simple common tasks in fx2 firmware.
  19  * */
  20
  21 #ifndef FX2MACROS_H
  22 #define FX2MACROS_H
  23
  24 #include "fx2regs.h"
  25 #include "fx2types.h"
  26
  27 #define MSB(addr) (BYTE)(((WORD)(addr) >> 8) & 0xff)
  28 #define LSB(addr) (BYTE)((WORD)(addr) & 0xff)
  29 #define MAKEWORD(msb,lsb) (((WORD)msb << 8) | lsb)
  30
  31 #define MSW(dword) (WORD)((dword >> 16) & 0xffff)
  32 #define LSW(dword) (WORD)(dword & 0xffff)
  33 #define MAKEDWORD(msw,lsw) (((DWORD)msw << 16) | lsw)
  34
  35 // clock stuff
  36
  37 /**
  38  * \brief Used for getting and setting the CPU clock speed.
  39  **/
  40 typedef enum { CLK_12M =0, CLK_24M, CLK_48M} CLK_SPD;
  41
  42 /**
  43  * \brief Evaluates to a CLK_SPD enum.
  44  **/
  45 #define CPUFREQ (CLK_SPD)((CPUCS & bmCLKSPD) >> 3)
  46 /**
  47  * \brief Sets the cpu to operate at a specific
  48  *  clock speed.
  49  **/
  50 #define SETCPUFREQ(SPD) CPUCS = (CPUCS & ~bmCLKSPD) | (SPD << 3)
  51
  52 /**
  53  * \brief Evaluates to a DWORD value representing
  54  *  the clock speed in cycles per second.
  55  *
  56  * Speeds:
  57  *
  58  *  \li 12000000L
  59  *  \li 24000000L
  60  *  \li 48000000L
  61  *
  62  **/
  63 #define XTAL (CPUFREQ==CLK_12M ? 12000000L :\
  64               CPUFREQ==CLK_24M ? 24000000L : 48000000L)
  65
  66
  67 /**
  68  * \brief Evaluates to the i2c bus frequency in cyles per
  69  * second.
  70  *
  71  * Speeds:
  72  *
  73  * \li 400000L
  74  * \li 100000L
  75  *
  76  **/
  77 #define I2CFREQ ((I2CTL & bm400KHZ) ? 400000L : 100000L)
  78
  79
  80 #define IFFREQ (IFCONFIG & bm3048MHZ ? 48000000L : 30000000L)
  81 #define SETIF30MHZ() IFCONFIG &= ~bm3048MHZ
  82 #define SETIF48MHZ() IFCONFIG |= bm3048MHZ
  83
  84
  85 // eeprom stuff
  86 #define EEPROM_TWO_BYTE (I2CS & bmBIT4)
  87
  88 /**
  89  * \brief Cause the device to disconnect and reconnect to USB.  This macro
  90  *  unconditionally renumerates the device no matter how the firmware is loaded.
  91  *
  92  *  <b>NOTE</b> Windows really doesn't like this if the firmware is loaded
  93  *  from an eeprom.  You'll see information messages about the device not
  94  *  working properly.  On the other hand, if you are changing the device
  95  *  descriptor, e.g., the vendor and product id, when downloading firmware to the device,
  96  *  you'll need to use this macro instead of the
  97  *  standard RENUMERATE macro.
  98  **/
  99 #define RENUMERATE_UNCOND() USBCS|=bmDISCON|bmRENUM;delay(1500);USBCS&=~bmDISCON
 100 /**
 101  * \brief Cause the device to disconnect and reconnect to the USB bus.  This macro
 102  *  doesn't do anything if the firmware is loaded from an eeprom.
 103  **/
 104 #define RENUMERATE() if(!(USBCS&bmRENUM)) {USBCS|=bmDISCON|bmRENUM;delay(1500);USBCS &= ~bmDISCON;}
 105
 106
 107 // interrupts
 108 // USB interrupts are in usbjt.h
 109
 110
 111
 112
 113 /**
 114  * \brief TRUE if the FX2 has transitioned to high speed on the USB bus..
 115  **/
 116 #define HISPEED (USBCS&bmHSM)
 117
 118
 119
 120
 121 /**
 122  * \brief Evaluates to TRUE if a remote wakeup event has occurred.
 123  **/
 124 #define REMOTE_WAKEUP() (((WAKEUPCS & bmWU) && (WAKEUPCS & bmWUEN)) || ((WAKEUPCS & bmWU2) && (WAKEUPCS & bmWU2EN)))
 125
 126
 127 #endif