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i2c device

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This commit is contained in:
MikuQ.com 2016-06-05 19:30:36 +08:00
parent d9f184c1f1
commit 2d9103b806
5 changed files with 33 additions and 19 deletions
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22
MikuPi.cpp
View File

@ -19,6 +19,15 @@
#include "MikuPi.h"
char *i2cDevice;
const char *i2cDevices[3] =
{
"/dev/i2c-0",
"/dev/i2c-1",
"/dev/i2c-2"
} ;
const char *piModelNames [7] =
{
"Unknown",
@ -180,8 +189,8 @@ void sayHello()
else
{
printf ("BananaPi Details:\n") ;
printf (" Type: %s, Memory: %dMB\n",
piModelNames [model], mem) ;
printf (" Type: %s, Memory: %dMB\n", piModelNames [model], mem) ;
//printf (" I2C Device: %s\n",i2cDevice) ;
}
}
@ -202,13 +211,14 @@ void mikuPiSetup (void)
printf (" i@mikuq.com\n") ;
piBoardRevOops ("with a copy of your /proc/cpuinfo if possible") ;
}
if (model == PI_MODEL_M2p)
{
if (model == PI_MODEL_M2p) {
wPinToGpio=wPinToGpioM2p;
i2cDevice=(char *)i2cDevices[0];
}
if (model == PI_MODEL_M3)
{
if (model == PI_MODEL_M3) {
wPinToGpio=wPinToGpioM3;
i2cDevice=(char *)i2cDevices[3];
}
fd = open("/dev/mem", O_RDWR);

3
MikuPi.h
View File

@ -27,9 +27,10 @@
#define PI_MODEL_M3 5
#define PI_MODEL_M2p 6
extern char *i2cDevice;
extern const int bPinTowPin[41];
#define VERSION "0.21"
#define VERSION "0.25"
extern const char *piModelNames [7] ;

2
README.md
View File

@ -46,6 +46,8 @@ sudo ./blink
3.(2016-06-04) update to C++ & add Relay
4.(2016-06-05) add Wire & SHT2x
upload
git add .
git commit -a -m "md"
git push origin master

5
Wire.cpp
View File

@ -14,6 +14,7 @@
*
*/
#include "MikuPi.h"
#include "Wire.h"
uint8 TwoWire::rxBuffer[BUFFER_LENGTH];
@ -27,7 +28,7 @@ TwoWire::TwoWire()
void TwoWire::requestFrom(int address, int quantity)
{
I2cError = 0;
if ((I2cDevHandle = open("/dev/i2c-0", O_RDWR)) < 0) I2cError |= ERROR_I2C_OPEN;
if ((I2cDevHandle = open(i2cDevice, O_RDWR)) < 0) I2cError |= ERROR_I2C_OPEN;
else
{
if (ioctl(I2cDevHandle, I2C_SLAVE,address) < 0) I2cError |= ERROR_I2C_SETUP;
@ -47,7 +48,7 @@ void TwoWire::requestFrom(int address, int quantity)
void TwoWire::beginTransmission(int address)
{
I2cError = 0;
if ((I2cDevHandle = open("/dev/i2c-0", O_RDWR)) < 0) I2cError |= ERROR_I2C_OPEN;
if ((I2cDevHandle = open(i2cDevice, O_RDWR)) < 0) I2cError |= ERROR_I2C_OPEN;
else
{
if (ioctl(I2cDevHandle, I2C_SLAVE,address) < 0) I2cError |= ERROR_I2C_SETUP;