JN5179: Need a help in SPI peripheral configuration

[rajanisureja1]

I am using JN5179-001-M16 chipset and I have connected the SPI based flash memory AT25SF161B on JN5179 SPI peripheral, The connected pins are as mentioned below:

DIO0 as a SPI CLK, 

DIO7 as a SPI MOSI,

DIO1 as a SPI MISO,

DIO6 as a SPISEL0 (CS)

JN5179 SPI initialization which I have used to verify the SPI communication with flash memory AT25SF161B are as given below which reads the manufacturing information.

void SPI_Init() {

vAHI_SetDIOpinMultiplexValue(0, 1); // DIO0 as SPI CLK
vAHI_SetDIOpinMultiplexValue(7, 1); // DIO7 as SPI MOSI
vAHI_SetDIOpinMultiplexValue(1, 1); // DIO1 as SPI MISO
vAHI_SetDIOpinMultiplexValue(6, 1); // DIO6 as SPISEL0 (CS)

vAHI_SpiConfigure(
1, // Use SPISEL0 (DIO6)
FALSE, // MSB first
FALSE, // Clock Polarity 0 (Mode 0)
FALSE, // Clock Phase 0 (Mode 0)
3, // SPI Clock Divider (1MHz)
FALSE, // Disable SPI Interrupts
TRUE // Enable Auto-CS (Hardware Controls SPISEL0)
);
}

// SPI Transfer Function (Send and Receive a Byte)
uint8 SPI_Transfer(uint8 data) {
vAHI_SpiStartTransfer8(data); // Send 8-bit SPI data
while (bAHI_SpiPollBusy()); // Wait until transfer is complete
return u8AHI_SpiReadTransfer8(); // Read 8-bit SPI response
}

// SPI Send-Only Function (For Commands That Don't Require a Response)
void SPI_SendOnly(uint8 data) {
vAHI_SpiStartTransfer8(data);
while (bAHI_SpiPollBusy()); // Wait until transfer is complete
}

void SPI_ReadManufacturingID() {
uint8 manufacturer_id, memory_type, capacity;

DBG_vPrintf(TRUE,"Sending JEDEC ID Read Command (0x9F)...\n");
SPI_SendOnly(0x9F); // Send Read JEDEC ID Command

DBG_vPrintf(TRUE,"Reading Manufacturer ID...\n");
manufacturer_id = SPI_Transfer(0xFF); // Read Manufacturer ID
memory_type = SPI_Transfer(0xFF); // Read Memory Type
capacity = SPI_Transfer(0xFF); // Read Capacity

DBG_vPrintf(TRUE,"Manufacturer ID: 0x%x\n", manufacturer_id);
DBG_vPrintf(TRUE,"Memory Type: 0x%x\n", memory_type);
DBG_vPrintf(TRUE,"Capacity: 0x%x\n", capacity);
}

 The issue is that I could not able to get the CS line is getting low. Can you please let me know the issue with initialization?

[luis_maravilla]

Hi

Are you using an application note or example by NXP for your application?

I would recommend checking the Chapter 14 and 15 in JN517x Integrated Peripherals API User Guide.

Here is a link for it JN517x Integrated Peripherals API User Guide

Best Regards

[rajanisureja1]

Thank you for the reply, I am following the same document and I can able run the SPI communication successfully after configuring in manual chip select control mode.

Thanks

Rajani Sureja