sevyls / ekg Goto Github PK

Dear sir,

first I would like to thank you for great work you have done.
I would like to kindly ask you for a help, we assembled a board utilizing ADAS1000. It communicates via SPI (CS=0) with Raspberry 3B.
We decided to use standard spidev way instead of bcm2835 therefore your code is very suitable for our purpose.
I modified your code changing chip select to 0: SpiOpenPort(0); (it is also necessary to mention that when I leave chip select to 1, the software says: Result = 1: initialization was successful, but we have it on cs=0)
I also lowered the bus speed to Raspberry supported 488000Hz: spi_speed = 488000;
BUT, the first write fails with output:
Problem transmitting spi data..ioctl: Inappropriate ioctl for device

I also checked spidev test result yielding:
spi mode: 0x0
bits per word: 8
max speed: 500000 Hz (500 KHz)

Actually, our board is originally supported by this software based on bcm2835:
https://github.com/martinr89/BiosignalPI
This software requires a bit more of initialization of other pins:
bcm2835_gpio_fsel(PIN18, BCM2835_GPIO_FSEL_OUTP);
bcm2835_gpio_write(PIN18, LOW);
delay(100);
bcm2835_gpio_write(PIN18, HIGH);
delay(100);
bcm2835_gpio_fsel(PIN16, BCM2835_GPIO_FSEL_INPT);
/*
bcm2835_spi_begin();
bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST);
bcm2835_spi_setDataMode(BCM2835_SPI_MODE0);
bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_512);
bcm2835_spi_chipSelect(BCM2835_SPI_CS0);
bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS0, LOW);
The original software seems to communicate with the board.
But I don't know how much it is necessary to set the remaining GPIO pins in order for your code to work properly.

Thank you