Hi
I want to use arduino SPI part of PULPino, not sure if it is necessary to write SS pin low for PULPino before SPI.transfer( ),
If I want to write this kind of arduino code, digitalWrite(SS, x) , is necessary for your arduino part ?
because not see in your sw/app example SPI_test.cpp. But in normal arduino board, it need this command digitalWrite(SS, 0) to select salve part before SPI.tansfer()
But I saw in your sw/libs/Arduino_lib/core_libs/inc/pins_arduino.h, there have pin definition for SPI's SS. Is it this SS will automatically turn low when SPI.transfer( ) begin? ( I use Zedboard FPGA)
or
Should I have setting like const byte SS= 16; pinMode(16, Output) in arduino code at begining, and change one bit of pulpinomu_top.v 's gpio_out[16] for SS in vivado?
Any suggestion for this SS pin setting for Zedboard
BTW,
I make PULPino SPI master 4 pins (MISO MOSI SS SCLK) to output in FPGA so I can connect slave part at ZedBoard by SPI.
And I guess spi_master_csn0_o pin is connect to arduino pin SS, right?
mrninhvn
commented
4 years ago
Hi I want to use arduino SPI part of PULPino, not sure if it is necessary to write SS pin low for PULPino before SPI.transfer( ), If I want to write this kind of arduino code, digitalWrite(SS, x) , is necessary for your arduino part ?
because not see in your sw/app example SPI_test.cpp. But in normal arduino board, it need this command digitalWrite(SS, 0) to select salve part before SPI.tansfer()
But I saw in your sw/libs/Arduino_lib/core_libs/inc/pins_arduino.h, there have pin definition for SPI's SS. Is it this SS will automatically turn low when SPI.transfer( ) begin? ( I use Zedboard FPGA)
or
Should I have setting like const byte SS= 16; pinMode(16, Output) in arduino code at begining, and change one bit of pulpinomu_top.v 's gpio_out[16] for SS in vivado?
Any suggestion for this SS pin setting for Zedboard
BTW, I make PULPino SPI master 4 pins (MISO MOSI SS SCLK) to output in FPGA so I can connect slave part at ZedBoard by SPI. And I guess spi_master_csn0_o pin is connect to arduino pin SS, right?
Thank you Frank