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wiringPi Version 2 - First commit (of v2)

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This commit is contained in:
Gordon Henderson
2013-05-13 19:43:26 +01:00
parent 98bcb20d93
commit da38443cb2
97 changed files with 11243 additions and 1617 deletions
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28
wiringPi/wiringPiSPI.c
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@@ -25,20 +25,24 @@
#include <stdint.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sys/ioctl.h>
#include <linux/spi/spidev.h>
#include "wiringPi.h"
#include "wiringPiSPI.h"
// The SPI bus parameters
// Variables as they need to be passed as pointers later on
static char *spiDev0 = "/dev/spidev0.0" ;
static char *spiDev1 = "/dev/spidev0.1" ;
static uint8_t spiMode = 0 ;
static uint8_t spiBPW = 8 ;
static uint16_t spiDelay = 0;
const static char *spiDev0 = "/dev/spidev0.0" ;
const static char *spiDev1 = "/dev/spidev0.1" ;
const static uint8_t spiMode = 0 ;
const static uint8_t spiBPW = 8 ;
const static uint16_t spiDelay = 0 ;
static uint32_t spiSpeeds [2] ;
static int spiFds [2] ;
@@ -95,7 +99,7 @@ int wiringPiSPISetup (int channel, int speed)
channel &= 1 ;
if ((fd = open (channel == 0 ? spiDev0 : spiDev1, O_RDWR)) < 0)
return -1 ;
return wiringPiFailure (WPI_ALMOST, "Unable to open SPI device: %s\n", strerror (errno)) ;
spiSpeeds [channel] = speed ;
spiFds [channel] = fd ;
@@ -104,14 +108,14 @@ int wiringPiSPISetup (int channel, int speed)
// Why are we reading it afterwriting it? I've no idea, but for now I'm blindly
// copying example code I've seen online...
if (ioctl (fd, SPI_IOC_WR_MODE, &spiMode) < 0) return -1 ;
if (ioctl (fd, SPI_IOC_RD_MODE, &spiMode) < 0) return -1 ;
if (ioctl (fd, SPI_IOC_WR_BITS_PER_WORD, &spiBPW) < 0) return -1 ;
if (ioctl (fd, SPI_IOC_RD_BITS_PER_WORD, &spiBPW) < 0) return -1 ;
if (ioctl (fd, SPI_IOC_WR_MODE, &spiMode) < 0)
return wiringPiFailure (WPI_ALMOST, "SPI Mode Change failure: %s\n", strerror (errno)) ;
if (ioctl (fd, SPI_IOC_WR_BITS_PER_WORD, &spiBPW) < 0)
return wiringPiFailure (WPI_ALMOST, "SPI BPW Change failure: %s\n", strerror (errno)) ;
if (ioctl (fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed) < 0) return -1 ;
if (ioctl (fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed) < 0) return -1 ;
return wiringPiFailure (WPI_ALMOST, "SPI Speed Change failure: %s\n", strerror (errno)) ;
return fd ;
}