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Updated AVR32 demos and added AVR32 UC3B demo.

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This commit is contained in:
Richard Barry 2007-07-27 07:59:50 +00:00
parent 45e7e5ac55
commit 94c94d3c0e
164 changed files with 21458 additions and 3994 deletions
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29
Demo/AVR32_UC3/DRIVERS/USART/usart.c
View file

@ -11,7 +11,7 @@
* - AppNote:
*
* \author Atmel Corporation: http://www.atmel.com \n
* Support email: avr32@atmel.com
* Support and FAQ: http://support.atmel.no/
*
******************************************************************************/
@ -70,9 +70,12 @@ static __inline__ int usart_mode_is_multidrop(volatile avr32_usart_t *usart)
/*! \brief Calculates a clock divider (\e CD) that gets the USART as close to a
* wanted baudrate as possible.
*
* \todo manage the FP fractal part to avoid big errors
*
* Baudrate calculation:
* \f$ baudrate = \frac{Selected Clock}{16 \times CD} \f$ with 16x oversampling or
* \f$ baudrate = \frac{Selected Clock}{8 \times CD} \f$ with 8x oversampling.
* \f$ baudrate = \frac{Selected Clock}{8 \times CD} \f$ with 8x oversampling or
* \f$ baudrate = \frac{Selected Clock}{CD} \f$ with SYNC bit set to allow high speed.
*
* \param usart Base address of the USART instance.
* \param baudrate Wanted baudrate.
@ -90,20 +93,30 @@ static int usart_set_baudrate(volatile avr32_usart_t *usart, unsigned int baudra
// Baudrate calculation.
if (baudrate < pba_hz / 16)
{
// Use 16x oversampling.
usart->mr &=~ AVR32_USART_MR_OVER_MASK;
cd = pba_hz / (16 * baudrate);
// Use 16x oversampling, clear SYNC bit.
usart->mr &=~ (AVR32_USART_MR_OVER_MASK | AVR32_USART_MR_SYNC_MASK);
cd = (pba_hz + 8 * baudrate) / (16 * baudrate);
if ((cd >65535)) return USART_INVALID_INPUT;
}
else
else if (baudrate < pba_hz / 8)
{
// Use 8x oversampling.
usart->mr |= AVR32_USART_MR_OVER_MASK;
cd = pba_hz / (8 * baudrate);
// clear SYNC bit
usart->mr &=~ AVR32_USART_MR_SYNC_MASK;
cd = (pba_hz + 4 * baudrate) / (8 * baudrate);
if ((cd < 1)||(cd >65535)) return USART_INVALID_INPUT;
}
else
{
// set SYNC to 1
usart->mr |= AVR32_USART_MR_SYNC_MASK;
// use PBA/BaudRate
cd = (pba_hz / baudrate);
}
usart->brgr = cd << AVR32_USART_BRGR_CD_OFFSET;
return USART_SUCCESS;
@ -303,8 +316,6 @@ int usart_init_iso7816(volatile avr32_usart_t *usart, const iso7816_options_t *o
return USART_SUCCESS;
}
//! @}

74
Demo/AVR32_UC3/DRIVERS/USART/usart.h
View file

@ -11,7 +11,7 @@
* - AppNote:
*
* \author Atmel Corporation: http://www.atmel.com \n
* Support email: avr32@atmel.com
* Support and FAQ: http://support.atmel.no/
*
******************************************************************************/
@ -46,14 +46,7 @@
#ifndef _USART_H_
#define _USART_H_
#if __GNUC__
# include <avr32/io.h>
#elif __ICCAVR32__
# include <avr32/iouc3a0512.h>
#else
# error Unknown compiler
#endif
#include <avr32/io.h>
#include "compiler.h"
@ -97,6 +90,7 @@
#define USART_MODE_SW_HSH AVR32_USART_MR_MODE_SOFTWARE //!< RS232 mode with software handshaking.
//! @}
/*! \name Channel Modes
*/
//! @{
@ -171,6 +165,26 @@ typedef struct
int bit_order;
} iso7816_options_t;
//! Input parameters when initializing ISO7816 modes.
typedef struct
{
//! Set the frequency of the SPI clock.
unsigned long baudrate;
//! Number of bits to transmit as a character (5 to 9).
unsigned char charlength;
//! Run the channel in testmode: \ref USART_NORMAL_CHMODE, \ref USART_AUTO_ECHO,
//! \ref USART_LOCAL_LOOPBACK or \ref USART_REMOTE_LOOPBACK.
unsigned char channelmode;
//! Which SPI mode to use when transmitting.
unsigned char spimode;
} usart_spi_options_t;
//------------------------------------------------------------------------------
/*! \name Initialization Functions
@ -254,8 +268,50 @@ extern int usart_init_rs485(volatile avr32_usart_t *usart, const usart_options_t
*/
extern int usart_init_iso7816(volatile avr32_usart_t *usart, const iso7816_options_t *opt, int t, long pba_hz);
/*! \brief Sets up the USART to use the SPI mode as master.
*
* \param usart Base address of the USART instance.
* \param opt Options needed to set up SPI mode (see \ref usart_spi_options_t).
* \param pba_hz USART module input clock frequency (PBA clock, Hz).
*
* \retval USART_SUCCESS Mode successfully initialized.
* \retval USART_INVALID_INPUT One or more of the arguments is out of valid range.
*/
extern int usart_init_spi_master(volatile avr32_usart_t *usart, const usart_spi_options_t *opt, long pba_hz);
/*! \brief Sets up the USART to use the SPI mode as slave.
*
* \param usart Base address of the USART instance.
* \param opt Options needed to set up SPI mode (see \ref usart_spi_options_t).
* \param pba_hz USART module input clock frequency (PBA clock, Hz).
*
* \retval USART_SUCCESS Mode successfully initialized.
* \retval USART_INVALID_INPUT One or more of the arguments is out of valid range.
*/
extern int usart_init_spi_slave(volatile avr32_usart_t *usart, const usart_spi_options_t *opt, long pba_hz);
//! @}
//------------------------------------------------------------------------------
/*! \brief Selects slave chip.
*
* \param usart Base address of the USART instance.
*
* \return Status.
* \retval USART_SUCCESS Success.
*/
extern int usart_spi_selectChip(volatile avr32_usart_t *usart);
/*! \brief Unselects slave chip.
*
* \param usart Base address of the USART instance.
*
* \return Status.
* \retval USART_SUCCESS Success.
* \retval USART_FAILURE Time out.
*/
extern int usart_spi_unselectChip(volatile avr32_usart_t *usart);
//------------------------------------------------------------------------------
/*! \name Read and Reset Error Status Bits