Arty A7 and SPI on J6

[nikk]

Trying to test SPI on J6 with the simple program:

 

#include "xspi.h"
#include "xparameters.h"
#include "xil_printf.h"
#include "sleep.h"
int main() {
	xil_printf("Hello World!\r\n");
	static XSpi device;
	XSpi_Config *pcfg;


	int status;
	pcfg = XSpi_LookupConfig(XPAR_SPI_0_DEVICE_ID);
	xil_printf("Spi_LookupConfig = %d\r\n", pcfg);
	status = XSpi_CfgInitialize(&device, pcfg, pcfg->BaseAddress);
	xil_printf("XSpi_CfgInitialize = %d\r\n", status);

	status = XSpi_SetOptions(&device, XSP_MASTER_OPTION | XSP_MANUAL_SSELECT_OPTION);
	xil_printf("XSpi_SetOptions = %d\r\n", status);

	status = XSpi_Start(&device);
	xil_printf("XSpi_Start = %d\r\n", status);

	XSpi_IntrGlobalDisable(&device);
	xil_printf("XSpi_IntrGlobalDisable = %d\r\n", status);
	status = XSpi_SetSlaveSelect(&device, 0b1);
	xil_printf("XSpi_SetSlaveSelect = %d\r\n", status);

	u8 bytes [4] = {0x01,0x02,0x03,0x04};
	xil_printf("Before loop starts\r\n");
	while (1) {
		xil_printf("loop...\r\n");
		status = XSpi_Transfer(&device, bytes, NULL, 4);
		xil_printf("XSpi_Transfer = %d\r\n",status);
		usleep(1);

	}
}

Output:

Hello World!
Spi_LookupConfig = 9300
XSpi_CfgInitialize = 0
XSpi_SetOptions = 0
XSpi_Start = 0
XSpi_IntrGlobalDisable = 0
XSpi_SetSlaveSelect = 0
Before loop starts
loop...

on attached screenshot I see only two bytes are sent out and that is it, why?

Edited November 29, 2022 by nikk

[artvvb]

Hi @nikk

Based on the name of the IP in the block design, I would expect the Quad SPI's device ID xparameters macro to be XPAR_AXI_QUAD_SPI_0_DEVICE_ID, but I could be wrong. Where are you pulling XPAR_SPI_0_DEVICE_ID from?

Have you tried stepping through the XSpi_Transfer function in the debugger to see where exactly it is getting stuck?

Thanks,

Arthur