Hello Everybody,
I am configuring actually the SPI in order to get data from my image sensor, But I want to know before i send it to my image sensor if there is an option to simulate the signals( SCLK,SI,CS_N), I want be sure that i m sending the good command and data.
Also i have a constraint between (CS_N ,SCLK) for example i have to wait 10 cycle of SCLK after CS_N is asserted and and 10 cycles of SCLK before Cs_N is deasserted, i had to respect a delay between adresse and data i have to wait 3 system of clock.
So my second question is how can I ensure those constraints.
this is my code for 4 registres i am using an axi spi:
#include "xspi.h"
#include "xparameters.h"
#include "xil_printf.h"
#include <stdio.h>
#include "sleep.h"
//XSpiPs spi; // instance of spi
static XSpi_Config *config;
static XSpi instance;
u8 spi_initialisation(u32 spi_device_ID, u32 slavemask)
{
tXSpi_Initialize(&instance,XPAR_PS7_SPI_0_DEVICE_ID);
tXSpi_SetOptions(&instance, 1);
tXSpi_SetSlaveSelectReg(&instance, 1);
tXSpi_Start(&instance);
tXSpi_IntrGlobalDisable(&instance);
treturn(XST_SUCCESS);
}
void spi_singlwrite(u8 adresse_0,u8 adresse_1,u8 data_0,u8 data_1)
{
tint status;
tusleep(10);
t XSpi_Reset(&instance);
t spi_initialisation(XPAR_PS7_SPI_0_DEVICE_ID,1);
ttttu8 byte_0 = adresse_0;
ttttu8 byte_1 = adresse_1;
ttttu8 byte_2 = data_0;
ttttu8 byte_3 = data_1;
ttttu8 writebuffer[4] = {byte_0,byte_1,byte_2,byte_3};
ttttXSpi_SetSlaveSelectReg(&instance, 1);
tt status = XSpi_Transfer(&instance, writebuffer, NULL ,sizeof(writebuffer));
tt XSpi_SetSlaveSelectReg(&instance, 0);
tt if (status == XST_DEVICE_IS_STOPPED)
tt txil_printf("XST_DEVICE_IS_STOPPED.r
");
tt if (status == XST_DEVICE_BUSY)
tt txil_printf("XST_DEVICE_BUSY.r
");
tt if (status == XST_SPI_NO_SLAVE)
tt txil_printf("XST_SPI_NO_SLAVE.r
");
}
int main(void)
{
xil_printf("config spi start r
");
spi_initialisation(XPAR_PS7_SPI_0_DEVICE_ID,0);
spi_singlwrite(0x80,0x00,0x00,0x02);
usleep(10);
spi_singlwrite(0x80,0x01,0x00,0x90);
usleep(10);
spi_singlwrite(0x81,0x00,0x00,0x02);
usleep(10);
spi_singlwrite(0x81,0x01,0x00,0x90);
xil_printf("config spi fin r
");
return(0);
}
Thank you for your help.
Best regards,
Anisse BELMAJY
