Comments (9)
kashimAstro
commented on July 16, 2024
Hi @dammianhr,
may I ask what are you using integrated? It needs for ADC MCP3008 / MCP3004 for analog input?
If so, you should download the entire addons, there is now a MCP class for ADC management.
if it is other integrated, give me the datasheet, SPI currently the situation is a little confused, there are two SPI classes and I have to decide to eliminate a short it.
I can help out.
good day
from ofxgpio.
dammianhr
commented on July 16, 2024
hi! @kashimAstro
I'm trying to run this module:
http://www.hoperf.com/rf_transceiver/lora/RFM95W.html
i have the same error with the module plugged and unplugged
this is my code
`
void ofApp::setup(){
/* cs = new GPIO("8");
cs->export_gpio();
cs->setdir_gpio("out");*/
// spi.setup("/dev/spidev0.0",SPI_MODE_0, 1000000, 8);
d = new unsigned char[2];
//d[0] = (RH_RF95_REG_01_OP_MODE | RH_SPI_WRITE_MASK);
//d[1] = (RH_RF95_MODE_SLEEP | RH_RF95_LONG_RANGE_MODE);
d[0] = 1;
d[1] = 0;
int e = spi.spiWriteRead(d,2);
cout << "read/write status: " << e << endl;
//spi.readWrite(d);
/*
//unsigned char e*;
e = new unsigned char[1];
e[0] = RH_RF95_REG_01_OP_MODE;
spi.spiWriteRead(e,1);
cout << "The Result is: " << e << endl;
*/
}
`
from ofxgpio.
kashimAstro
commented on July 16, 2024
-
You have enabled SPI? You can be done easily with the command:
sudo raspi-config -> Advanced Options -> SPI -
After enabling SPI verify loading the module with:
lsmod | grep spi
and the creation of the device with the command:
ls /dev/spi* -
controls which PIN SPI you used, raspberry has two integrated SPI interfaces:
P1-24 CE0 /dev/spidev0.0
P1-26 CE1 /dev/spidev0.1
according to the PIN used, adjust the first parameter of: spi.setup("?",mode,speed,bits);
I have not read the datasheet, checks the SPI speed supported by the module.
hello
Dario
from ofxgpio.
dammianhr
commented on July 16, 2024
i get this
lsmod | grep spi
spi_bcm2835 8032 0
ls /dev/spi*
/dev/spidev0.0 /dev/spidev0.1
i use /dev/spidev0.0.
i test it in python and work fine!
from ofxgpio.
kashimAstro
commented on July 16, 2024
Hi @dammianhr,
pass me the python code.
from ofxgpio.
dammianhr
commented on July 16, 2024
import spidev
spi = spidev.SpiDev()
spi.open(0,0)
to_send = [(0x01 | 0x80),(0x00 | 0x80)]
spi.writebytes(to_send)
to_read = [0x01]
spi.writebytes(to_read)
recived = spi.readbytes(0)
if recived == [(0x00 | 0x80)]:
print "lora mode on!\n"
print recived
from ofxgpio.
kashimAstro
commented on July 16, 2024
Hi @dammianhr,
try using the SPI2 class, right now I can not verify this code work, try to see if it works.
#include "ofMain.h"
#include "ofxGPIO.h"
class ofApp : public ofBaseApp{
public:
SPI2 spi;
void setup(){
int channel = 0;
spi.setup(channel,1000000);
char data[2];
data[0] = (0x01 | 0x80);
data[1] = (0x00 | 0x80);
char *p = data;
if( spi.readWrite(channel,p,sizeof(data)) )
{
ofLog()<<"Send Request OK!";
}
}
};
int main()
{
ofSetupOpenGL(1024,768, OF_WINDOW);
ofRunApp( new ofApp() );
}
Ciao
from ofxgpio.
dammianhr
commented on July 16, 2024
hi @kashimAstro !
thanks for your help,
I did several tests and found that my problem was a rare performance of the CS pin .
In python i defined a new pin CS and works well , but not so with ofxGPIO
python code:
import spidev
import time
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setup(22, GPIO.OUT)
GPIO.setup(24, GPIO.OUT)
GPIO.output(24,True)
GPIO.output(22,False)
time.sleep(0.5)
GPIO.output(22, True)
spi = spidev.SpiDev()
spi.open(0,0)
spi.bits_per_word = 8
spi.mode = 0
spi.max_speed_hz = 3000000
to_send = [(0x01 | 0x80), (0x00 | 0x80)]
GPIO.output(24,False)
spi.writebytes(to_send)
GPIO.output(24,True)
time.sleep(0.01)
GPIO.output(24,False)
to_read = [0x01]
spi.writebytes(to_read)
recived = spi.readbytes(0)
GPIO.output(24,True)
if recived == [(0x00 | 0x80)]:
print "lora mode on!\n"
print "OP_MODE: ",BytesToHex(recived) , "bin: ", recived
OF code:
#include "ofApp.h"
#define RH_SPI_WRITE_MASK 0x80
#define RH_RF95_REG_01_OP_MODE 0x01
#define RH_RF95_MODE_SLEEP 0x00
#define RH_RF95_LONG_RANGE_MODE 0x80
//--------------------------------------------------------------
void ofApp::setup(){
int ch = 0;
cs = new GPIO("24");
cs->export_gpio();
cs->setdir_gpio("out");
cs->setval_gpio("1");
rst = new GPIO("22");
rst->export_gpio();
rst->setdir_gpio("out");
rst->setval_gpio("0");
usleep(500000);
rst->setval_gpio("1");
// usleep(50000);
spi.setup(ch, 3000000);
spi.spiMode = SPI_MODE_0;
// spi.spiDelay = 10000;
uint8_t f[2];
f[0] = (RH_RF95_REG_01_OP_MODE | RH_SPI_WRITE_MASK);
f[1] = (RH_RF95_MODE_SLEEP | RH_RF95_LONG_RANGE_MODE);
cs->setval_gpio("0");
usleep(50000);
int e = spi.readWrite(ch, f, sizeof(f));
// usleep(10000);
cs->setval_gpio("1");
usleep(10000);
if(e) cout << "write ok: " << endl;
uint8_t r[1];
r[0] = RH_RF95_REG_01_OP_MODE;
cs->setval_gpio("0");
usleep(50000);
e = spi.readWrite(ch, r, sizeof(r));
// usleep(50000);
cs->setval_gpio("1");
usleep(10000);
if(e) cout << "write/read ok: " << endl;
cout << "The Result is: " << int(r[0]) << endl;
usleep(500000);
cs->setval_gpio("0");
rst->setval_gpio("0");
cs->unexport_gpio();
rst->unexport_gpio();
close(spi.getFD(ch));
}
from ofxgpio.
kashimAstro
commented on July 16, 2024
Hi @dammianhr,
Maybe I understand the problem, you are using the wrong GPIO numbering, python libraries maintain an internal map of the pin that ofxGPIO do not.
for the execution of the ofxGPIO pins you have to use internal numbers, look at the following image:
check patch: "new GPIO("number pin")"
#include "ofMain.h"
#include "ofxGPIO.h"
#define RH_SPI_WRITE_MASK 0x80
#define RH_RF95_REG_01_OP_MODE 0x01
#define RH_RF95_MODE_SLEEP 0x00
#define RH_RF95_LONG_RANGE_MODE 0x80
class ofApp : public ofBaseApp{
public:
GPIO *cs;
GPIO *rst;
SPI2 spi;
void setup(){
int ch = 0;
cs = new GPIO("18"); //GPIO24
cs->export_gpio();
cs->setdir_gpio("out");
cs->setval_gpio("1");
rst = new GPIO("15"); //GPIO22
rst->export_gpio();
rst->setdir_gpio("out");
rst->setval_gpio("0");
usleep(500000);
rst->setval_gpio("1");
// usleep(50000);
spi.setup(ch, 3000000);
spi.spiMode = SPI_MODE_0;
// spi.spiDelay = 10000;
uint8_t f[2];
f[0] = (RH_RF95_REG_01_OP_MODE | RH_SPI_WRITE_MASK);
f[1] = (RH_RF95_MODE_SLEEP | RH_RF95_LONG_RANGE_MODE);
cs->setval_gpio("0");
usleep(50000);
int e = spi.readWrite(ch, f, sizeof(f));
// usleep(10000);
cs->setval_gpio("1");
usleep(10000);
if(e) cout << "write ok: " << endl;
uint8_t r[1];
r[0] = RH_RF95_REG_01_OP_MODE;
cs->setval_gpio("0");
usleep(50000);
e = spi.readWrite(ch, r, sizeof(r));
// usleep(50000);
cs->setval_gpio("1");
usleep(10000);
if(e) cout << "write/read ok: " << endl;
cout << "The Result is: " << int(r[0]) << endl;
usleep(500000);
cs->setval_gpio("0");
rst->setval_gpio("0");
cs->unexport_gpio();
rst->unexport_gpio();
close(spi.getFD(ch));
}
};
int main( ){
ofSetupOpenGL(1024,768, OF_WINDOW);
ofRunApp( new ofApp());
}
from ofxgpio.
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from ofxgpio.