ahoneybun/qmk_firmware
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Fixed AVRISP programmer demo -- can now connect to a target and read/write Sig/Lock/Fuse/OSCCAL bytes successfully.

Browse source 
Changed SPI_Init() to allow for the clock polarity and data sample modes to be set.

Changed Dataflash_Init() to no longer call SPI_Init() automatically.
This commit is contained in:
Dean Camera 2009-08-23 08:37:11 +00:00
parent 1e8df8951a
commit f229502d9a
9 changed files with 58 additions and 63 deletions
Download patch file Download diff file Expand all files Collapse all files

31
LUFA/Drivers/Peripheral/SPI.h
View file

@ -61,7 +61,7 @@
/* Private Interface - For use in library only: */
#if !defined(__DOXYGEN__)
/* Macros: */
#define SPI_USE_DOUBLESPEED (1 << 7)
#define SPI_USE_DOUBLESPEED (1 << SPE)
#endif
/* Public Interface - May be used in end-application: */
@ -86,23 +86,40 @@
/** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 128. */
#define SPI_SPEED_FCPU_DIV_128 ((1 << SPR1) | (1 << SPR0))
/** SPI clock polarity mask for SPI_Init(). Indicates that the SCK should lead on the rising edge. */
#define SPI_SCK_LEAD_RISING (0 << CPOL)
/** SPI clock polarity mask for SPI_Init(). Indicates that the SCK should lead on the falling edge. */
#define SPI_SCK_LEAD_FALLING (1 << CPOL)
/** SPI data sample mode mask for SPI_Init(). Indicates that the data should sampled on the leading edge. */
#define SPI_SAMPLE_LEADING (0 << CPHA)
/** SPI data sample mode mask for SPI_Init(). Indicates that the data should be sampled on the trailing edge. */
#define SPI_SAMPLE_TRAILING (1 << CPHA)
/** SPI mode mask for SPI_Init(). Indicates that the SPI interface should be initialized into slave mode. */
#define SPI_MODE_SLAVE (0 << MSTR)
/** SPI mode mask for SPI_Init(). Indicates that the SPI interface should be initialized into master mode. */
#define SPI_MODE_MASTER (1 << MSTR)
/* Inline Functions: */
/** Initializes the SPI subsystem, ready for transfers. Must be called before calling any other
* SPI routines.
*
* \param[in] PrescalerMask Prescaler mask to set the SPI clock speed
* \param[in] Master If true, sets the SPI system to use master mode, slave if false
* \param[in] SPIOptions SPI Options, a mask consisting of one of each of the SPI_SPEED_*,
* SPI_SCK_*, SPI_SAMPLE_* and SPI_MODE_* masks
*/
static inline void SPI_Init(const uint8_t PrescalerMask, const bool Master)
static inline void SPI_Init(const uint8_t SPIOptions)
{
DDRB |= ((1 << 1) | (1 << 2));
PORTB |= ((1 << 0) | (1 << 3));
SPCR = ((1 << SPE) | (Master << MSTR) | (1 << CPOL) | (1 << CPHA) |
(PrescalerMask & ~SPI_USE_DOUBLESPEED));
SPCR = ((1 << SPE) | SPIOptions);
if (PrescalerMask & SPI_USE_DOUBLESPEED)
if (SPIOptions & SPI_USE_DOUBLESPEED)
SPSR |= (1 << SPI2X);
else
SPSR &= ~(1 << SPI2X);