1.26.13.3 QSPIx_RegisterRead Function

C 

// x - Instance of the QSPI peripheral

bool QSPIx_RegisterRead
(
qspi_register_xfer_t *qspi_register_xfer,
uint32_t *rx_data,
uint8_t rx_data_length
);

Summary

Reads particular register of QSPI slave device.

Description

This function can be used to read a particular register of QSPI slave device which has a command code associated to it.

Precondition

QSPIx_Initialize must have been called for the associated QSPI instance.

Parameters

Param Description
*qspi_register_xfer pointer to QSPI register transfer structure holding the instructioncode register and instruction frame register information. \
*rx_data Pointer to receive buffer where the register data will be stored.
rx_data_length Register width in bytes.

Returns

  • True on transfer request success.

  • False on transfer request failure.

Example 

#define READ_STATUS_REG_CODE 0x05

static qspi_register_xfer_t qspi_register_xfer;
static uint8_t reg_data;

// Use QAUD SPI Lane
qspi_register_xfer.width = QUAD_CMD;
qspi_register_xfer.dummy_cycles = 2;

// Read status register of 1 Byte width
qspi_register_xfer.instruction = READ_STATUS_REG_CODE;

if (QSPI0_RegisterRead(&qspi_register_xfer, (uint32_t *)&reg_data, 1) == false)
{
    // Handle Error
}