SPI Master communication with SPI Slave
Posted: Mon May 02, 2011 4:53 am
Hello,
I have two SUB-20 devices, and two different programs controlling them. One configured as SPI Master with the following configuration
"sub_spi_config(fd, SPI_ENABLE|SPI_CPOL_RISE|SPI_SMPL_SETUP|SPI_MSB_FIRST|SPI_CLK_4MHZ,0)"
and the other SUB-20 device as SPI Slave FIFO configured as
"rc = sub_spi_config(fd, SPI_ENABLE|SPI_SLAVE|SPI_CPOL_RISE|SPI_SETUP_SMPL|SPI_LSB_FIRST|SPI_CLK_4MHZ, 0 )"
"sub_fifo_config(fd, FIFO_SELECT_SPI)".
The SPI Master writes 1 byte data using sub_spi_transfer function and the SPI Slave must read the data using the sub_fifo_read function. But the SPI slave fails reading any data and shows BULK READ FAILED.
Can anyone say how to make this communication happen between the two devices successfully. I am using Ubuntu 10.10 and libusb-1.0.
It's urgent.
I have two SUB-20 devices, and two different programs controlling them. One configured as SPI Master with the following configuration
"sub_spi_config(fd, SPI_ENABLE|SPI_CPOL_RISE|SPI_SMPL_SETUP|SPI_MSB_FIRST|SPI_CLK_4MHZ,0)"
and the other SUB-20 device as SPI Slave FIFO configured as
"rc = sub_spi_config(fd, SPI_ENABLE|SPI_SLAVE|SPI_CPOL_RISE|SPI_SETUP_SMPL|SPI_LSB_FIRST|SPI_CLK_4MHZ, 0 )"
"sub_fifo_config(fd, FIFO_SELECT_SPI)".
The SPI Master writes 1 byte data using sub_spi_transfer function and the SPI Slave must read the data using the sub_fifo_read function. But the SPI slave fails reading any data and shows BULK READ FAILED.
Can anyone say how to make this communication happen between the two devices successfully. I am using Ubuntu 10.10 and libusb-1.0.
It's urgent.