3 Copyright (C) Dean Camera, 2012.
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5 dean [at] fourwalledcubicle [dot] com
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10 Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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12 Permission to use, copy, modify, distribute, and sell this
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13 software and its documentation for any purpose is hereby granted
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14 without fee, provided that the above copyright notice appear in
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15 all copies and that both that the copyright notice and this
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16 permission notice and warranty disclaimer appear in supporting
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17 documentation, and that the name of the author not be used in
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18 advertising or publicity pertaining to distribution of the
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19 software without specific, written prior permission.
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21 The author disclaim all warranties with regard to this
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22 software, including all implied warranties of merchantability
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23 and fitness. In no event shall the author be liable for any
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24 special, indirect or consequential damages or any damages
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25 whatsoever resulting from loss of use, data or profits, whether
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26 in an action of contract, negligence or other tortious action,
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27 arising out of or in connection with the use or performance of
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32 * \brief USB Host definitions for the AVR8 microcontrollers.
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33 * \copydetails Group_Host_AVR8
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35 * \note This file should not be included directly. It is automatically included as needed by the USB driver
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36 * dispatch header located in LUFA/Drivers/USB/USB.h.
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39 /** \ingroup Group_Host
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40 * \defgroup Group_Host_AVR8 Host Management (AVR8)
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41 * \brief USB Host definitions for the AVR8 microcontrollers.
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43 * Architecture specific USB Host definitions for the Atmel 8-bit AVR microcontrollers.
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48 #ifndef __USBHOST_AVR8_H__
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49 #define __USBHOST_AVR8_H__
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52 #include "../../../../Common/Common.h"
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53 #include "../StdDescriptors.h"
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54 #include "../Pipe.h"
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55 #include "../USBInterrupt.h"
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57 /* Enable C linkage for C++ Compilers: */
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58 #if defined(__cplusplus)
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62 /* Preprocessor Checks: */
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63 #if !defined(__INCLUDE_FROM_USB_DRIVER)
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64 #error Do not include this file directly. Include LUFA/Drivers/USB/USB.h instead.
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67 #if defined(INVERTED_VBUS_ENABLE_LINE) && !defined(NO_AUTO_VBUS_MANAGEMENT)
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68 #error The INVERTED_VBUS_ENABLE_LINE compile option requires NO_AUTO_VBUS_MANAGEMENT for the AVR8 architecture.
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71 /* Public Interface - May be used in end-application: */
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73 /** Indicates the fixed USB device address which any attached device is enumerated to when in
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74 * host mode. As only one USB device may be attached to the AVR in host mode at any one time
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75 * and that the address used is not important (other than the fact that it is non-zero), a
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76 * fixed value is specified by the library.
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78 #define USB_HOST_DEVICEADDRESS 1
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80 #if !defined(HOST_DEVICE_SETTLE_DELAY_MS) || defined(__DOXYGEN__)
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81 /** Constant for the delay in milliseconds after a device is connected before the library
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82 * will start the enumeration process. Some devices require a delay of up to 5 seconds
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83 * after connection before the enumeration process can start or incorrect operation will
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86 * The default delay value may be overridden in the user project makefile by defining the
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87 * \c HOST_DEVICE_SETTLE_DELAY_MS token to the required delay in milliseconds, and passed to the
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88 * compiler using the -D switch.
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90 #define HOST_DEVICE_SETTLE_DELAY_MS 1000
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93 /** Enum for the error codes for the \ref EVENT_USB_Host_HostError() event.
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95 * \see \ref Group_Events for more information on this event.
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97 enum USB_Host_ErrorCodes_t
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99 HOST_ERROR_VBusVoltageDip = 0, /**< VBUS voltage dipped to an unacceptable level. This
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100 * error may be the result of an attached device drawing
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101 * too much current from the VBUS line, or due to the
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102 * AVR's power source being unable to supply sufficient
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107 /** Enum for the error codes for the \ref EVENT_USB_Host_DeviceEnumerationFailed() event.
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109 * \see \ref Group_Events for more information on this event.
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111 enum USB_Host_EnumerationErrorCodes_t
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113 HOST_ENUMERROR_NoError = 0, /**< No error occurred. Used internally, this is not a valid
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114 * ErrorCode parameter value for the \ref EVENT_USB_Host_DeviceEnumerationFailed()
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117 HOST_ENUMERROR_WaitStage = 1, /**< One of the delays between enumeration steps failed
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118 * to complete successfully, due to a timeout or other
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121 HOST_ENUMERROR_NoDeviceDetected = 2, /**< No device was detected, despite the USB data lines
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122 * indicating the attachment of a device.
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124 HOST_ENUMERROR_ControlError = 3, /**< One of the enumeration control requests failed to
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125 * complete successfully.
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127 HOST_ENUMERROR_PipeConfigError = 4, /**< The default control pipe (address 0) failed to
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128 * configure correctly.
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132 /* Inline Functions: */
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133 /** Returns the current USB frame number, when in host mode. Every millisecond the USB bus is active (i.e. not suspended)
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134 * the frame number is incremented by one.
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136 * \return Current USB frame number from the USB controller.
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138 static inline uint16_t USB_Host_GetFrameNumber(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
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139 static inline uint16_t USB_Host_GetFrameNumber(void)
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144 #if !defined(NO_SOF_EVENTS)
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145 /** Enables the host mode Start Of Frame events. When enabled, this causes the
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146 * \ref EVENT_USB_Host_StartOfFrame() event to fire once per millisecond, synchronized to the USB bus,
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147 * at the start of each USB frame when a device is enumerated while in host mode.
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149 * \note This function is not available when the \c NO_SOF_EVENTS compile time token is defined.
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151 static inline void USB_Host_EnableSOFEvents(void) ATTR_ALWAYS_INLINE;
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152 static inline void USB_Host_EnableSOFEvents(void)
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154 USB_INT_Enable(USB_INT_HSOFI);
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157 /** Disables the host mode Start Of Frame events. When disabled, this stops the firing of the
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158 * \ref EVENT_USB_Host_StartOfFrame() event when enumerated in host mode.
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160 * \note This function is not available when the \c NO_SOF_EVENTS compile time token is defined.
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162 static inline void USB_Host_DisableSOFEvents(void) ATTR_ALWAYS_INLINE;
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163 static inline void USB_Host_DisableSOFEvents(void)
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165 USB_INT_Disable(USB_INT_HSOFI);
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169 /** Resets the USB bus, including the endpoints in any attached device and pipes on the AVR host.
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170 * USB bus resets leave the default control pipe configured (if already configured).
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172 * If the USB bus has been suspended prior to issuing a bus reset, the attached device will be
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173 * woken up automatically and the bus resumed after the reset has been correctly issued.
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175 static inline void USB_Host_ResetBus(void) ATTR_ALWAYS_INLINE;
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176 static inline void USB_Host_ResetBus(void)
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178 UHCON |= (1 << RESET);
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181 /** Determines if a previously issued bus reset (via the \ref USB_Host_ResetBus() macro) has
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184 * \return Boolean \c true if no bus reset is currently being sent, \c false otherwise.
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186 static inline bool USB_Host_IsBusResetComplete(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
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187 static inline bool USB_Host_IsBusResetComplete(void)
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189 return ((UHCON & (1 << RESET)) ? false : true);
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192 /** Resumes USB communications with an attached and enumerated device, by resuming the transmission
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193 * of the 1MS Start Of Frame messages to the device. When resumed, USB communications between the
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194 * host and attached device may occur.
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196 static inline void USB_Host_ResumeBus(void) ATTR_ALWAYS_INLINE;
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197 static inline void USB_Host_ResumeBus(void)
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199 UHCON |= (1 << SOFEN);
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202 /** Suspends the USB bus, preventing any communications from occurring between the host and attached
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203 * device until the bus has been resumed. This stops the transmission of the 1MS Start Of Frame
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204 * messages to the device.
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206 * \attention While the USB bus is suspended, all USB interrupt sources are also disabled; this means that
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207 * some events (such as device disconnections) will not fire until the bus is resumed.
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209 static inline void USB_Host_SuspendBus(void) ATTR_ALWAYS_INLINE;
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210 static inline void USB_Host_SuspendBus(void)
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212 UHCON &= ~(1 << SOFEN);
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215 /** Determines if the USB bus has been suspended via the use of the \ref USB_Host_SuspendBus() macro,
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216 * false otherwise. While suspended, no USB communications can occur until the bus is resumed,
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217 * except for the Remote Wakeup event from the device if supported.
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219 * \return Boolean \c true if the bus is currently suspended, \c false otherwise.
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221 static inline bool USB_Host_IsBusSuspended(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
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222 static inline bool USB_Host_IsBusSuspended(void)
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224 return ((UHCON & (1 << SOFEN)) ? false : true);
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227 /** Determines if the attached device is currently enumerated in Full Speed mode (12Mb/s), or
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228 * false if the attached device is enumerated in Low Speed mode (1.5Mb/s).
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230 * \return Boolean \c true if the attached device is enumerated in Full Speed mode, \c false otherwise.
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232 static inline bool USB_Host_IsDeviceFullSpeed(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
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233 static inline bool USB_Host_IsDeviceFullSpeed(void)
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235 return ((USBSTA & (1 << SPEED)) ? true : false);
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238 /** Determines if the attached device is currently issuing a Remote Wakeup request, requesting
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239 * that the host resume the USB bus and wake up the device, false otherwise.
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241 * \return Boolean \c true if the attached device has sent a Remote Wakeup request, \c false otherwise.
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243 static inline bool USB_Host_IsRemoteWakeupSent(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
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244 static inline bool USB_Host_IsRemoteWakeupSent(void)
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246 return ((UHINT & (1 << RXRSMI)) ? true : false);
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249 /** Clears the flag indicating that a Remote Wakeup request has been issued by an attached device. */
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250 static inline void USB_Host_ClearRemoteWakeupSent(void) ATTR_ALWAYS_INLINE;
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251 static inline void USB_Host_ClearRemoteWakeupSent(void)
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253 UHINT &= ~(1 << RXRSMI);
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256 /** Accepts a Remote Wakeup request from an attached device. This must be issued in response to
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257 * a device's Remote Wakeup request within 2ms for the request to be accepted and the bus to
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260 static inline void USB_Host_ResumeFromWakeupRequest(void) ATTR_ALWAYS_INLINE;
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261 static inline void USB_Host_ResumeFromWakeupRequest(void)
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263 UHCON |= (1 << RESUME);
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266 /** Determines if a resume from Remote Wakeup request is currently being sent to an attached
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269 * \return Boolean \c true if no resume request is currently being sent, \c false otherwise.
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271 static inline bool USB_Host_IsResumeFromWakeupRequestSent(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
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272 static inline bool USB_Host_IsResumeFromWakeupRequestSent(void)
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274 return ((UHCON & (1 << RESUME)) ? false : true);
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277 /* Private Interface - For use in library only: */
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278 #if !defined(__DOXYGEN__)
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280 static inline void USB_Host_HostMode_On(void) ATTR_ALWAYS_INLINE;
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281 static inline void USB_Host_HostMode_On(void)
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283 USBCON |= (1 << HOST);
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286 static inline void USB_Host_HostMode_Off(void) ATTR_ALWAYS_INLINE;
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287 static inline void USB_Host_HostMode_Off(void)
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289 USBCON &= ~(1 << HOST);
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292 static inline void USB_Host_VBUS_Auto_Enable(void) ATTR_ALWAYS_INLINE;
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293 static inline void USB_Host_VBUS_Auto_Enable(void)
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295 OTGCON &= ~(1 << VBUSHWC);
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296 UHWCON |= (1 << UVCONE);
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299 static inline void USB_Host_VBUS_Manual_Enable(void) ATTR_ALWAYS_INLINE;
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300 static inline void USB_Host_VBUS_Manual_Enable(void)
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302 OTGCON |= (1 << VBUSHWC);
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303 UHWCON &= ~(1 << UVCONE);
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308 static inline void USB_Host_VBUS_Auto_On(void) ATTR_ALWAYS_INLINE;
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309 static inline void USB_Host_VBUS_Auto_On(void)
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311 OTGCON |= (1 << VBUSREQ);
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314 static inline void USB_Host_VBUS_Manual_On(void) ATTR_ALWAYS_INLINE;
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315 static inline void USB_Host_VBUS_Manual_On(void)
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317 #if defined(INVERTED_VBUS_ENABLE_LINE)
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318 PORTE &= ~(1 << 7);
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324 static inline void USB_Host_VBUS_Auto_Off(void) ATTR_ALWAYS_INLINE;
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325 static inline void USB_Host_VBUS_Auto_Off(void)
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327 OTGCON |= (1 << VBUSRQC);
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330 static inline void USB_Host_VBUS_Manual_Off(void) ATTR_ALWAYS_INLINE;
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331 static inline void USB_Host_VBUS_Manual_Off(void)
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333 #if defined(INVERTED_VBUS_ENABLE_LINE)
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336 PORTE &= ~(1 << 7);
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340 static inline void USB_Host_SetDeviceAddress(const uint8_t Address) ATTR_ALWAYS_INLINE;
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341 static inline void USB_Host_SetDeviceAddress(const uint8_t Address)
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343 UHADDR = (Address & 0x7F);
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347 enum USB_Host_WaitMSErrorCodes_t
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349 HOST_WAITERROR_Successful = 0,
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350 HOST_WAITERROR_DeviceDisconnect = 1,
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351 HOST_WAITERROR_PipeError = 2,
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352 HOST_WAITERROR_SetupStalled = 3,
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355 /* Function Prototypes: */
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356 void USB_Host_ProcessNextHostState(void);
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357 uint8_t USB_Host_WaitMS(uint8_t MS);
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359 #if defined(__INCLUDE_FROM_HOST_C)
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360 static void USB_Host_ResetDevice(void);
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364 /* Disable C linkage for C++ Compilers: */
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365 #if defined(__cplusplus)
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