B4R Question Use SPI.H Library in B4R

[Gerardo Tenreiro]

Hi, I'm trying to use the arduino SPI.H library in B4R without much success, it's been a couple of weeks now and I'm stuck
In Arduino the code is:

// ESP32 Arduino CODE
#include <SPI.h>
static const int spiClk = 1000000; // 1 MHz

SPIClass * vspi = NULL;


static int data = 0; // Contador de Pasadas

uint8_t D0 = 0;
uint8_t D1 = 0;
uint8_t D2 = 0;

double Valor =0;
double FET = 1000.0 / 8388607;


void setup() {

#define CSSPI 27
#define CLKSPI 14
#define OUTSPI 12
#define INSPI 13

Serial.begin(115200);

Serial.println("Arranque PRG");

//Pines Normalñizados del SPI
//SCLK = 18, MISO = 19, MOSI = 23, SS = 5

pinMode(CSSPI , OUTPUT);
pinMode(CLKSPI, OUTPUT);
pinMode(OUTSPI, OUTPUT);
pinMode(INSPI, INPUT_PULLUP);

vspi = new SPIClass(HSPI); // VSPI=Funciona, HSPI = Funciona, SPI=Funciona
vspi->begin(CLKSPI,INSPI,OUTSPI,CSSPI);

Serial.println("Inicia Rutina");
}

void loop()
{
//use the SPI buses

Envia_por_SPI();
delay(10);
//Serial.println(data);

}

void Envia_por_SPI() {

data = data + 1;
if (data > 200) data = 0;

vspi->beginTransaction(SPISettings(spiClk, MSBFIRST, SPI_MODE1));
digitalWrite(CSSPI, LOW); //Activa CS, lo pone a nivel bajo

vspi->transfer(81);
vspi->transfer(3);
vspi->transfer(1);
vspi->transfer(0);
vspi->transfer(240);
vspi->transfer(1);

vspi->transfer(1); // Solicita Lectura del Canal

vspi->endTransaction();
vspi->beginTransaction(SPISettings(spiClk, MSBFIRST, SPI_MODE2));

D2 = vspi->transfer(0);
D1 = vspi->transfer(0);
D0 = vspi->transfer(0);

digitalWrite(CSSPI, HIGH); //Desactiva CS, lo pone a nivel alto
vspi->endTransaction();

// Calcula el Valor en Bruto
Valor =(D2 * 65536) + (D1 * 256) + D0;

//' Si es un numero Negativo Realiza el Complemento a 2
if (D2 > 128) {
Valor = 16777215 - Valor;
Valor = Valor * -1;
}

Valor = Valor * FET;

Serial.printf("Lee Valor=");
Serial.println(Valor);

How I could use it in b4R
Thank you

 

[tigrot]

Look for rSPI a porting of SPI.

 

[tigrot]

rSPI

Hi all, yesterday I was watching a tutorial about using spi library in Arduino. I tried to port this in B4R. I think I succeeded but someone more experienced should check it and let me know if everything works ok. There is the necessary needed functionality in the Code Module but there are also...

www.b4x.com

 

[Gerardo Tenreiro]

That library is not working with ESP32, I already wrote to Hatzisn about it and the query is to try to solve the problem.
For Arduino and ESP8266 the library is working fine but with the ESP32D the dual core does not work since the SPI is stepped on and it gives a write error on the internal memory.
The Code sent if it works correctly from arduino, so I want to pass it to B4R but my C does not give that much.
Thank you

 

[tigrot]

I didn't notice your need.

 

[tigrot]

I have time later or maybe tomorrow, can you parametrize calls , so I can show you how to use the library in B4R?

 

[Gerardo Tenreiro]

Thank you very much, it would be of great help.

 

[tigrot]

Not tested, but simple to mantain, I have almost created a wrapper... I have no ESP32 to test, look at ESP setup....

 

[Gerardo Tenreiro]

Ok, It works but two important instructions are missing which are
vspi->beginTransaction(SPISettings(spiClk, MSBFIRST, SPI_MODE1));
with its three parameters
Thank you

 

[tigrot]

Tomorrow will add

 

[tigrot]

You say two missing, but only one is listed. Can you fix your assertion?

 

[tigrot]

Look at comments in looper I have implemented mode 1 and 2

 

[Gerardo Tenreiro]

Seen the implementation
I'm going to try it but the intention would be to pass the parameters directly as if it were the SPI library itself, so I could use it with all the functions.
I comment on the test results
Thank you

 

[tigrot]

Seen the implementation
I'm going to try it but the intention would be to pass the parameters directly as if it were the SPI library itself, so I could use it with all the functions.
I comment on the test results
Thank you

Passing parameters is Limited, you can write a B4R library that will help. Write a wrapper following my steps. It's simple...

 

[tigrot]

Any news?

 

[Gerardo Tenreiro]

Hello
Right now resend the tests of the fully operational library, there is a small doubt that I will review these days but it is working, you can follow us at this link

https://www.b4x.com/android/forum/conversations/rspi-library.28317/page-4#convMessage-142695

Thank you very much for your help and I hope that the library will be of great use to many people.
Thanks

 

[tigrot]

You are welcome, de Nada, prego.

 

[sasetcolombia]

Is it possible to adapt it to record data on SDCARD?
SPI1.begin(MY_SCLK, MY_MISO, MY_MOSI, MY_CS);

I'm trying to use an sd card module with the TTGO T-call SIM800L.
I can't use the SPI pins because I need to use also the SIM800L module.
the TTGO TCAL SIM800L V1.4 uses pin23 as PWR and this same pin is MOSI for SDCARD
In version 1.3 it would conflict with pin 5. RST to SIM800L and VPPI_SS (CP)

https://user-images.githubusercontent.com/53688337/85398433-d9036900-b572-11ea-99ec-04e912b5fd72.JPG
The rSD library uses by default the MOSI(23),MISO(19),SCK(18) and CS(5) pins.
I need to configure other pins for SDCARD (or 23)

 

[KiloBravo]

RST is Reset which is not defined as part of the SDI (SCLK, MISO, MOSI, CS) interface definition as far as I know.
From the post above ....
***CHANGE HERE THE PIN NUMBERS (SCK, MISO, MOSI,CS)***
SPI.ESP32_SPI_Set_Pins(18,19,23,CS)
SPI.CSPinDeActivate(SPI.CS__SPI)

It looks like you should use v 1.3. CS above is Chip Select. You should be able to use any GPIO pin for CS.
Find an open GPIO pin and use it. If one GPIO does not work for CS try a different pin. It should work.
Let us know if it works.

 

[sasetcolombia]

The objective is to create a file on the SD CARD and store sensor data. (The rSD library works, but if I don't use the SIM800L integrated in TTGO TCALL )
With rSPI32, how could I assign the name of the file that is created in the SD CARD?
Thanks!