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Diffstat (limited to 'lib/lufa/LUFA/Drivers/Peripheral/AVR8/TWI_AVR8.h')
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| -rw-r--r-- | lib/lufa/LUFA/Drivers/Peripheral/AVR8/TWI_AVR8.h | 305 |
2 files changed, 0 insertions, 305 deletions
diff --git a/lib/lufa b/lib/lufa new file mode 160000 +Subproject ce10f7642b0459e409839b23cc91498945119b4 diff --git a/lib/lufa/LUFA/Drivers/Peripheral/AVR8/TWI_AVR8.h b/lib/lufa/LUFA/Drivers/Peripheral/AVR8/TWI_AVR8.h deleted file mode 100644 index a8b845a5d7..0000000000 --- a/lib/lufa/LUFA/Drivers/Peripheral/AVR8/TWI_AVR8.h +++ /dev/null @@ -1,305 +0,0 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2017. - - dean [at] fourwalledcubicle [dot] com - www.lufa-lib.org -*/ - -/* - Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com) - - Permission to use, copy, modify, distribute, and sell this - software and its documentation for any purpose is hereby granted - without fee, provided that the above copyright notice appear in - all copies and that both that the copyright notice and this - permission notice and warranty disclaimer appear in supporting - documentation, and that the name of the author not be used in - advertising or publicity pertaining to distribution of the - software without specific, written prior permission. - - The author disclaims all warranties with regard to this - software, including all implied warranties of merchantability - and fitness. In no event shall the author be liable for any - special, indirect or consequential damages or any damages - whatsoever resulting from loss of use, data or profits, whether - in an action of contract, negligence or other tortious action, - arising out of or in connection with the use or performance of - this software. -*/ - -/** \file - * \brief TWI Peripheral Driver (AVR8) - * - * On-chip TWI driver for the 8-bit AVR microcontrollers. - * - * \note This file should not be included directly. It is automatically included as needed by the TWI driver - * dispatch header located in LUFA/Drivers/Peripheral/TWI.h. - */ - -/** \ingroup Group_TWI - * \defgroup Group_TWI_AVR8 TWI Peripheral Driver (AVR8) - * - * \section Sec_TWI_AVR8_ModDescription Module Description - * Master mode TWI driver for the 8-bit AVR microcontrollers which contain a hardware TWI module. - * - * \note This file should not be included directly. It is automatically included as needed by the TWI driver - * dispatch header located in LUFA/Drivers/Peripheral/TWI.h. - * - * \section Sec_TWI_AVR8_ExampleUsage Example Usage - * The following snippet is an example of how this module may be used within a typical - * application. - * - * <b>Low Level API Example:</b> - * \code - * // Initialize the TWI driver before first use at 200KHz - * TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 200000)); - * - * // Start a write session to device at device address 0xA0, internal address 0xDC with a 10ms timeout - * if (TWI_StartTransmission(0xA0 | TWI_ADDRESS_WRITE, 10) == TWI_ERROR_NoError) - * { - * TWI_SendByte(0xDC); - * - * TWI_SendByte(0x01); - * TWI_SendByte(0x02); - * TWI_SendByte(0x03); - * - * // Must stop transmission afterwards to release the bus - * TWI_StopTransmission(); - * } - * - * // Start a read session to device at address 0xA0, internal address 0xDC with a 10ms timeout - * if (TWI_StartTransmission(0xA0 | TWI_ADDRESS_WRITE, 10) == TWI_ERROR_NoError) - * { - * TWI_SendByte(0xDC); - * TWI_StopTransmission(); - * - * if (TWI_StartTransmission(0xA0 | TWI_ADDRESS_READ, 10) == TWI_ERROR_NoError) - * { - * uint8_t Byte1, Byte2, Byte3; - * - * // Read three bytes, acknowledge after the third byte is received - * TWI_ReceiveByte(&Byte1, false); - * TWI_ReceiveByte(&Byte2, false); - * TWI_ReceiveByte(&Byte3, true); - * - * // Must stop transmission afterwards to release the bus - * TWI_StopTransmission(); - * } - * } - * \endcode - * - * <b>High Level API Example:</b> - * \code - * // Initialize the TWI driver before first use at 200KHz - * TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 200000)); - * - * // Start a write session to device at device address 0xA0, internal address 0xDC with a 10ms timeout - * uint8_t InternalWriteAddress = 0xDC; - * uint8_t WritePacket[3] = {0x01, 0x02, 0x03}; - * - * TWI_WritePacket(0xA0, 10, &InternalWriteAddress, sizeof(InternalWriteAddress), - * &WritePacket, sizeof(WritePacket); - * - * // Start a read session to device at address 0xA0, internal address 0xDC with a 10ms timeout - * uint8_t InternalReadAddress = 0xDC; - * uint8_t ReadPacket[3]; - * - * TWI_ReadPacket(0xA0, 10, &InternalReadAddress, sizeof(InternalReadAddress), - * &ReadPacket, sizeof(ReadPacket); - * \endcode - * - * @{ - */ - -#ifndef __TWI_AVR8_H__ -#define __TWI_AVR8_H__ - - /* Includes: */ - #include "../../../Common/Common.h" - - #include <stdio.h> - #include <util/twi.h> - - /* Enable C linkage for C++ Compilers: */ - #if defined(__cplusplus) - extern "C" { - #endif - - /* Preprocessor Checks: */ - #if !defined(__INCLUDE_FROM_TWI_H) && !defined(__INCLUDE_FROM_TWI_C) - #error Do not include this file directly. Include LUFA/Drivers/Peripheral/TWI.h instead. - #endif - - #if !(defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__) || \ - defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB647__) || \ - defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)) - #error The TWI peripheral driver is not currently available for your selected microcontroller model. - #endif - - /* Public Interface - May be used in end-application: */ - /* Macros: */ - /** TWI slave device address mask for a read session. Mask with a slave device base address to obtain - * the correct TWI bus address for the slave device when reading data from it. - */ - #define TWI_ADDRESS_READ 0x01 - - /** TWI slave device address mask for a write session. Mask with a slave device base address to obtain - * the correct TWI bus address for the slave device when writing data to it. - */ - #define TWI_ADDRESS_WRITE 0x00 - - /** Mask to retrieve the base address for a TWI device, which can then be ORed with \ref TWI_ADDRESS_READ - * or \ref TWI_ADDRESS_WRITE to obtain the device's read and write address respectively. - */ - #define TWI_DEVICE_ADDRESS_MASK 0xFE - - /** Bit length prescaler for \ref TWI_Init(). This mask multiplies the TWI bit length prescaler by 1. */ - #define TWI_BIT_PRESCALE_1 ((0 << TWPS1) | (0 << TWPS0)) - - /** Bit length prescaler for \ref TWI_Init(). This mask multiplies the TWI bit length prescaler by 4. */ - #define TWI_BIT_PRESCALE_4 ((0 << TWPS1) | (1 << TWPS0)) - - /** Bit length prescaler for \ref TWI_Init(). This mask multiplies the TWI bit length prescaler by 16. */ - #define TWI_BIT_PRESCALE_16 ((1 << TWPS1) | (0 << TWPS0)) - - /** Bit length prescaler for \ref TWI_Init(). This mask multiplies the TWI bit length prescaler by 64. */ - #define TWI_BIT_PRESCALE_64 ((1 << TWPS1) | (1 << TWPS0)) - - /** Calculates the length of each bit on the TWI bus for a given target frequency. This may be used with - * the \ref TWI_Init() function to convert a bus frequency to a number of clocks for the \c BitLength - * parameter. - * - * \param[in] Prescale Prescaler set on the TWI bus. - * \param[in] Frequency Desired TWI bus frequency in Hz. - * - * \return Bit length in clocks for the given TWI bus frequency at the given prescaler value. - */ - #define TWI_BITLENGTH_FROM_FREQ(Prescale, Frequency) ((((F_CPU / (Prescale)) / (Frequency)) - 16) / 2) - - /* Enums: */ - /** Enum for the possible return codes of the TWI transfer start routine and other dependant TWI functions. */ - enum TWI_ErrorCodes_t - { - TWI_ERROR_NoError = 0, /**< Indicates that the command completed successfully. */ - TWI_ERROR_BusFault = 1, /**< A TWI bus fault occurred while attempting to capture the bus. */ - TWI_ERROR_BusCaptureTimeout = 2, /**< A timeout occurred whilst waiting for the bus to be ready. */ - TWI_ERROR_SlaveResponseTimeout = 3, /**< No ACK received at the nominated slave address within the timeout period. */ - TWI_ERROR_SlaveNotReady = 4, /**< Slave NAKed the TWI bus START condition. */ - TWI_ERROR_SlaveNAK = 5, /**< Slave NAKed whilst attempting to send data to the device. */ - }; - - /* Inline Functions: */ - /** Initializes the TWI hardware into master mode, ready for data transmission and reception. This must be - * before any other TWI operations. - * - * The generated SCL frequency will be according to the formula <pre>F_CPU / (16 + 2 * BitLength + 4 ^ Prescale)</pre>. - * - * \attention The value of the \c BitLength parameter should not be set below 10 or invalid bus conditions may - * occur, as indicated in the AVR8 microcontroller datasheet. - * - * \param[in] Prescale Prescaler to use when determining the bus frequency, a \c TWI_BIT_PRESCALE_* value. - * \param[in] BitLength Length of the bits sent on the bus. - */ - static inline void TWI_Init(const uint8_t Prescale, - const uint8_t BitLength) ATTR_ALWAYS_INLINE; - static inline void TWI_Init(const uint8_t Prescale, - const uint8_t BitLength) - { - TWCR |= (1 << TWEN); - TWSR = Prescale; - TWBR = BitLength; - } - - /** Turns off the TWI driver hardware. If this is called, any further TWI operations will require a call to - * \ref TWI_Init() before the TWI can be used again. - */ - static inline void TWI_Disable(void) ATTR_ALWAYS_INLINE; - static inline void TWI_Disable(void) - { - TWCR &= ~(1 << TWEN); - } - - /** Sends a TWI STOP onto the TWI bus, terminating communication with the currently addressed device. */ - static inline void TWI_StopTransmission(void) ATTR_ALWAYS_INLINE; - static inline void TWI_StopTransmission(void) - { - TWCR = ((1 << TWINT) | (1 << TWSTO) | (1 << TWEN)); - } - - /* Function Prototypes: */ - /** Begins a master mode TWI bus communication with the given slave device address. - * - * \param[in] SlaveAddress Address of the slave TWI device to communicate with. - * \param[in] TimeoutMS Timeout period within which the slave must respond, in milliseconds. - * - * \return A value from the \ref TWI_ErrorCodes_t enum. - */ - uint8_t TWI_StartTransmission(const uint8_t SlaveAddress, - const uint8_t TimeoutMS); - - /** Sends a byte to the currently addressed device on the TWI bus. - * - * \param[in] Byte Byte to send to the currently addressed device - * - * \return Boolean \c true if the recipient ACKed the byte, \c false otherwise - */ - bool TWI_SendByte(const uint8_t Byte); - - /** Receives a byte from the currently addressed device on the TWI bus. - * - * \param[in] Byte Location where the read byte is to be stored. - * \param[in] LastByte Indicates if the byte should be ACKed if false, NAKed if true. - * - * \return Boolean \c true if the byte reception successfully completed, \c false otherwise. - */ - bool TWI_ReceiveByte(uint8_t* const Byte, - const bool LastByte) ATTR_NON_NULL_PTR_ARG(1); - - /** High level function to perform a complete packet transfer over the TWI bus to the specified - * device. - * - * \param[in] SlaveAddress Base address of the TWI slave device to communicate with. - * \param[in] TimeoutMS Timeout for bus capture and slave START ACK, in milliseconds. - * \param[in] InternalAddress Pointer to a location where the internal slave read start address is stored. - * \param[in] InternalAddressLen Size of the internal device address, in bytes. - * \param[in] Buffer Pointer to a buffer where the read packet data is to be stored. - * \param[in] Length Size of the packet to read, in bytes. - * - * \return A value from the \ref TWI_ErrorCodes_t enum. - */ - uint8_t TWI_ReadPacket(const uint8_t SlaveAddress, - const uint8_t TimeoutMS, - const uint8_t* InternalAddress, - uint8_t InternalAddressLen, - uint8_t* Buffer, - uint16_t Length) ATTR_NON_NULL_PTR_ARG(3); - - /** High level function to perform a complete packet transfer over the TWI bus from the specified - * device. - * - * \param[in] SlaveAddress Base address of the TWI slave device to communicate with - * \param[in] TimeoutMS Timeout for bus capture and slave START ACK, in milliseconds - * \param[in] InternalAddress Pointer to a location where the internal slave write start address is stored - * \param[in] InternalAddressLen Size of the internal device address, in bytes - * \param[in] Buffer Pointer to a buffer where the packet data to send is stored - * \param[in] Length Size of the packet to send, in bytes - * - * \return A value from the \ref TWI_ErrorCodes_t enum. - */ - uint8_t TWI_WritePacket(const uint8_t SlaveAddress, - const uint8_t TimeoutMS, - const uint8_t* InternalAddress, - uint8_t InternalAddressLen, - const uint8_t* Buffer, - uint16_t Length) ATTR_NON_NULL_PTR_ARG(3); - - /* Disable C linkage for C++ Compilers: */ - #if defined(__cplusplus) - } - #endif - -#endif - -/** @} */ - |