M480 BSP V3.05.006
The Board Support Package for M480 Series
Macros | Functions

Macros

#define QSPI_CLR_UNIT_TRANS_INT_FLAG(qspi)
 Clear the unit transfer interrupt flag. More...
 
#define QSPI_TRIGGER_RX_PDMA(qspi)
 Trigger RX PDMA function. More...
 
#define QSPI_TRIGGER_TX_PDMA(qspi)
 Trigger TX PDMA function. More...
 
#define QSPI_TRIGGER_TX_RX_PDMA(qspi)
 Trigger TX and RX PDMA function. More...
 
#define QSPI_DISABLE_RX_PDMA(qspi)
 Disable RX PDMA transfer. More...
 
#define QSPI_DISABLE_TX_PDMA(qspi)
 Disable TX PDMA transfer. More...
 
#define QSPI_DISABLE_TX_RX_PDMA(qspi)
 Disable TX and RX PDMA transfer. More...
 
#define QSPI_GET_RX_FIFO_COUNT(qspi)
 Get the count of available data in RX FIFO. More...
 
#define QSPI_GET_RX_FIFO_EMPTY_FLAG(qspi)
 Get the RX FIFO empty flag. More...
 
#define QSPI_GET_TX_FIFO_EMPTY_FLAG(qspi)
 Get the TX FIFO empty flag. More...
 
#define QSPI_GET_TX_FIFO_FULL_FLAG(qspi)
 Get the TX FIFO full flag. More...
 
#define QSPI_READ_RX(qspi)
 Get the datum read from RX register. More...
 
#define QSPI_WRITE_TX(qspi, u32TxData)
 Write datum to TX register. More...
 
#define QSPI_SET_SS_HIGH(qspi)
 Set QSPIx_SS pin to high state. More...
 
#define QSPI_SET_SS_LOW(qspi)
 Set QSPIx_SS pin to low state. More...
 
#define QSPI_ENABLE_BYTE_REORDER(qspi)
 Enable Byte Reorder function. More...
 
#define QSPI_DISABLE_BYTE_REORDER(qspi)
 Disable Byte Reorder function. More...
 
#define QSPI_SET_SUSPEND_CYCLE(qspi, u32SuspCycle)
 Set the length of suspend interval. More...
 
#define QSPI_SET_LSB_FIRST(qspi)
 Set the QSPI transfer sequence with LSB first. More...
 
#define QSPI_SET_MSB_FIRST(qspi)
 Set the QSPI transfer sequence with MSB first. More...
 
#define QSPI_SET_DATA_WIDTH(qspi, u32Width)
 Set the data width of a QSPI transaction. More...
 
#define QSPI_IS_BUSY(qspi)
 Get the QSPI busy state. More...
 
#define QSPI_ENABLE(qspi)
 Enable QSPI controller. More...
 
#define QSPI_DISABLE(qspi)
 Disable QSPI controller. More...
 
#define QSPI_DISABLE_DUAL_MODE(qspi)
 Disable QSPI Dual IO function. More...
 
#define QSPI_ENABLE_DUAL_INPUT_MODE(qspi)
 Enable Dual IO function and set QSPI Dual IO direction to input. More...
 
#define QSPI_ENABLE_DUAL_OUTPUT_MODE(qspi)
 Enable Dual IO function and set QSPI Dual IO direction to output. More...
 
#define QSPI_DISABLE_QUAD_MODE(qspi)
 Disable QSPI Dual IO function. More...
 
#define QSPI_ENABLE_QUAD_INPUT_MODE(qspi)
 Set QSPI Quad IO direction to input. More...
 
#define QSPI_ENABLE_QUAD_OUTPUT_MODE(qspi)
 Set QSPI Quad IO direction to output. More...
 

Functions

uint32_t QSPI_Open (QSPI_T *qspi, uint32_t u32MasterSlave, uint32_t u32QSPIMode, uint32_t u32DataWidth, uint32_t u32BusClock)
 This function make QSPI module be ready to transfer. More...
 
void QSPI_Close (QSPI_T *qspi)
 Disable QSPI controller. More...
 
void QSPI_ClearRxFIFO (QSPI_T *qspi)
 Clear RX FIFO buffer. More...
 
void QSPI_ClearTxFIFO (QSPI_T *qspi)
 Clear TX FIFO buffer. More...
 
void QSPI_DisableAutoSS (QSPI_T *qspi)
 Disable the automatic slave selection function. More...
 
void QSPI_EnableAutoSS (QSPI_T *qspi, uint32_t u32SSPinMask, uint32_t u32ActiveLevel)
 Enable the automatic slave selection function. More...
 
uint32_t QSPI_SetBusClock (QSPI_T *qspi, uint32_t u32BusClock)
 Set the QSPI bus clock. More...
 
void QSPI_SetFIFO (QSPI_T *qspi, uint32_t u32TxThreshold, uint32_t u32RxThreshold)
 Configure FIFO threshold setting. More...
 
uint32_t QSPI_GetBusClock (QSPI_T *qspi)
 Get the actual frequency of QSPI bus clock. Only available in Master mode. More...
 
void QSPI_EnableInt (QSPI_T *qspi, uint32_t u32Mask)
 Enable interrupt function. More...
 
void QSPI_DisableInt (QSPI_T *qspi, uint32_t u32Mask)
 Disable interrupt function. More...
 
uint32_t QSPI_GetIntFlag (QSPI_T *qspi, uint32_t u32Mask)
 Get interrupt flag. More...
 
void QSPI_ClearIntFlag (QSPI_T *qspi, uint32_t u32Mask)
 Clear interrupt flag. More...
 
uint32_t QSPI_GetStatus (QSPI_T *qspi, uint32_t u32Mask)
 Get QSPI status. More...
 

Detailed Description

Macro Definition Documentation

◆ QSPI_CLR_UNIT_TRANS_INT_FLAG

#define QSPI_CLR_UNIT_TRANS_INT_FLAG (   qspi)

Clear the unit transfer interrupt flag.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None.

Write 1 to UNITIF bit of QSPI_STATUS register to clear the unit transfer interrupt flag.

Definition at line 78 of file qspi.h.

◆ QSPI_DISABLE

#define QSPI_DISABLE (   qspi)

Disable QSPI controller.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None.

Clear QSPIEN (QSPI_CTL[0]) to disable QSPI controller.

Definition at line 293 of file qspi.h.

◆ QSPI_DISABLE_BYTE_REORDER

#define QSPI_DISABLE_BYTE_REORDER (   qspi)

Disable Byte Reorder function.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None.

Clear REORDER bit field of QSPI_CTL register to disable Byte Reorder function.

Definition at line 226 of file qspi.h.

◆ QSPI_DISABLE_DUAL_MODE

#define QSPI_DISABLE_DUAL_MODE (   qspi)

Disable QSPI Dual IO function.

Parameters
[in]qspiis the base address of QSPI module.
Returns
none

Definition at line 301 of file qspi.h.

◆ QSPI_DISABLE_QUAD_MODE

#define QSPI_DISABLE_QUAD_MODE (   qspi)

Disable QSPI Dual IO function.

Parameters
[in]qspiis the base address of QSPI module.
Returns
none

Definition at line 325 of file qspi.h.

◆ QSPI_DISABLE_RX_PDMA

#define QSPI_DISABLE_RX_PDMA (   qspi)

Disable RX PDMA transfer.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None.

Clear RXPDMAEN bit of QSPI_PDMACTL register to disable RX PDMA transfer function.

Definition at line 114 of file qspi.h.

◆ QSPI_DISABLE_TX_PDMA

#define QSPI_DISABLE_TX_PDMA (   qspi)

Disable TX PDMA transfer.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None.

Clear TXPDMAEN bit of QSPI_PDMACTL register to disable TX PDMA transfer function.

Definition at line 123 of file qspi.h.

◆ QSPI_DISABLE_TX_RX_PDMA

#define QSPI_DISABLE_TX_RX_PDMA (   qspi)

Disable TX and RX PDMA transfer.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None.

Clear TXPDMAEN bit and RXPDMAEN bit of QSPI_PDMACTL register to disable TX and RX PDMA transfer function.

Definition at line 132 of file qspi.h.

◆ QSPI_ENABLE

#define QSPI_ENABLE (   qspi)

Enable QSPI controller.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None.

Set QSPIEN (QSPI_CTL[0]) to enable QSPI controller.

Definition at line 284 of file qspi.h.

◆ QSPI_ENABLE_BYTE_REORDER

#define QSPI_ENABLE_BYTE_REORDER (   qspi)

Enable Byte Reorder function.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None.

Enable Byte Reorder function. The suspend interval depends on the setting of SUSPITV (QSPI_CTL[7:4]).

Definition at line 217 of file qspi.h.

◆ QSPI_ENABLE_DUAL_INPUT_MODE

#define QSPI_ENABLE_DUAL_INPUT_MODE (   qspi)

Enable Dual IO function and set QSPI Dual IO direction to input.

Parameters
[in]qspiis the base address of QSPI module.
Returns
none

Definition at line 309 of file qspi.h.

◆ QSPI_ENABLE_DUAL_OUTPUT_MODE

#define QSPI_ENABLE_DUAL_OUTPUT_MODE (   qspi)

Enable Dual IO function and set QSPI Dual IO direction to output.

Parameters
[in]qspiis the base address of QSPI module.
Returns
none

Definition at line 317 of file qspi.h.

◆ QSPI_ENABLE_QUAD_INPUT_MODE

#define QSPI_ENABLE_QUAD_INPUT_MODE (   qspi)

Set QSPI Quad IO direction to input.

Parameters
[in]qspiis the base address of QSPI module.
Returns
none

Definition at line 333 of file qspi.h.

◆ QSPI_ENABLE_QUAD_OUTPUT_MODE

#define QSPI_ENABLE_QUAD_OUTPUT_MODE (   qspi)

Set QSPI Quad IO direction to output.

Parameters
[in]qspiis the base address of QSPI module.
Returns
none

Definition at line 341 of file qspi.h.

◆ QSPI_GET_RX_FIFO_COUNT

#define QSPI_GET_RX_FIFO_COUNT (   qspi)

Get the count of available data in RX FIFO.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
The count of available data in RX FIFO.

Read RXCNT (QSPI_STATUS[27:24]) to get the count of available data in RX FIFO.

Definition at line 141 of file qspi.h.

◆ QSPI_GET_RX_FIFO_EMPTY_FLAG

#define QSPI_GET_RX_FIFO_EMPTY_FLAG (   qspi)

Get the RX FIFO empty flag.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Return values
0RX FIFO is not empty.
1RX FIFO is empty.

Read RXEMPTY bit of QSPI_STATUS register to get the RX FIFO empty flag.

Definition at line 151 of file qspi.h.

◆ QSPI_GET_TX_FIFO_EMPTY_FLAG

#define QSPI_GET_TX_FIFO_EMPTY_FLAG (   qspi)

Get the TX FIFO empty flag.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Return values
0TX FIFO is not empty.
1TX FIFO is empty.

Read TXEMPTY bit of QSPI_STATUS register to get the TX FIFO empty flag.

Definition at line 161 of file qspi.h.

◆ QSPI_GET_TX_FIFO_FULL_FLAG

#define QSPI_GET_TX_FIFO_FULL_FLAG (   qspi)

Get the TX FIFO full flag.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Return values
0TX FIFO is not full.
1TX FIFO is full.

Read TXFULL bit of QSPI_STATUS register to get the TX FIFO full flag.

Definition at line 171 of file qspi.h.

◆ QSPI_IS_BUSY

#define QSPI_IS_BUSY (   qspi)

Get the QSPI busy state.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Return values
0QSPI controller is not busy.
1QSPI controller is busy.

This macro will return the busy state of QSPI controller.

Definition at line 275 of file qspi.h.

◆ QSPI_READ_RX

#define QSPI_READ_RX (   qspi)

Get the datum read from RX register.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
Data in RX register.

Read QSPI_RX register to get the received datum.

Definition at line 180 of file qspi.h.

◆ QSPI_SET_DATA_WIDTH

#define QSPI_SET_DATA_WIDTH (   qspi,
  u32Width 
)

Set the data width of a QSPI transaction.

Parameters
[in]qspiThe pointer of the specified QSPI module.
[in]u32WidthThe bit width of one transaction.
Returns
None.

The data width can be 8 ~ 32 bits.

Definition at line 265 of file qspi.h.

◆ QSPI_SET_LSB_FIRST

#define QSPI_SET_LSB_FIRST (   qspi)

Set the QSPI transfer sequence with LSB first.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None.

Set LSB bit of QSPI_CTL register to set the QSPI transfer sequence with LSB first.

Definition at line 246 of file qspi.h.

◆ QSPI_SET_MSB_FIRST

#define QSPI_SET_MSB_FIRST (   qspi)

Set the QSPI transfer sequence with MSB first.

Parameters
[in]qspiThe pointer of the specified SPI module.
Returns
None.

Clear LSB bit of QSPI_CTL register to set the QSPI transfer sequence with MSB first.

Definition at line 255 of file qspi.h.

◆ QSPI_SET_SS_HIGH

#define QSPI_SET_SS_HIGH (   qspi)

Set QSPIx_SS pin to high state.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None.

Disable automatic slave selection function and set QSPIx_SS pin to high state.

Definition at line 199 of file qspi.h.

◆ QSPI_SET_SS_LOW

#define QSPI_SET_SS_LOW (   qspi)

Set QSPIx_SS pin to low state.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None.

Disable automatic slave selection function and set QSPIx_SS pin to low state.

Definition at line 208 of file qspi.h.

◆ QSPI_SET_SUSPEND_CYCLE

#define QSPI_SET_SUSPEND_CYCLE (   qspi,
  u32SuspCycle 
)

Set the length of suspend interval.

Parameters
[in]qspiThe pointer of the specified QSPI module.
[in]u32SuspCycleDecides the length of suspend interval. It could be 0 ~ 15.
Returns
None.

Set the length of suspend interval according to u32SuspCycle. The length of suspend interval is ((u32SuspCycle + 0.5) * the length of one QSPI bus clock cycle).

Definition at line 237 of file qspi.h.

◆ QSPI_TRIGGER_RX_PDMA

#define QSPI_TRIGGER_RX_PDMA (   qspi)

Trigger RX PDMA function.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None.

Set RXPDMAEN bit of QSPI_PDMACTL register to enable RX PDMA transfer function.

Definition at line 87 of file qspi.h.

◆ QSPI_TRIGGER_TX_PDMA

#define QSPI_TRIGGER_TX_PDMA (   qspi)

Trigger TX PDMA function.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None.

Set TXPDMAEN bit of QSPI_PDMACTL register to enable TX PDMA transfer function.

Definition at line 96 of file qspi.h.

◆ QSPI_TRIGGER_TX_RX_PDMA

#define QSPI_TRIGGER_TX_RX_PDMA (   qspi)

Trigger TX and RX PDMA function.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None.

Set TXPDMAEN bit and RXPDMAEN bit of QSPI_PDMACTL register to enable TX and RX PDMA transfer function.

Definition at line 105 of file qspi.h.

◆ QSPI_WRITE_TX

#define QSPI_WRITE_TX (   qspi,
  u32TxData 
)

Write datum to TX register.

Parameters
[in]qspiThe pointer of the specified QSPI module.
[in]u32TxDataThe datum which user attempt to transfer through QSPI bus.
Returns
None.

Write u32TxData to QSPI_TX register.

Definition at line 190 of file qspi.h.

Function Documentation

◆ QSPI_ClearIntFlag()

void QSPI_ClearIntFlag ( QSPI_T qspi,
uint32_t  u32Mask 
)

Clear interrupt flag.

Parameters
[in]qspiThe pointer of the specified QSPI module.
[in]u32MaskThe combination of all related interrupt sources. Each bit corresponds to a interrupt source. This parameter decides which interrupt flags will be cleared. It could be the combination of:
Returns
None

Clear QSPI related interrupt flags specified by u32Mask parameter.

Definition at line 724 of file qspi.c.

◆ QSPI_ClearRxFIFO()

void QSPI_ClearRxFIFO ( QSPI_T qspi)

Clear RX FIFO buffer.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None

This function will clear QSPI RX FIFO buffer. The RXEMPTY (QSPI_STATUS[8]) will be set to 1.

Definition at line 213 of file qspi.c.

◆ QSPI_ClearTxFIFO()

void QSPI_ClearTxFIFO ( QSPI_T qspi)

Clear TX FIFO buffer.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None

This function will clear QSPI TX FIFO buffer. The TXEMPTY (QSPI_STATUS[16]) will be set to 1.

Note
The TX shift register will not be cleared.

Definition at line 225 of file qspi.c.

◆ QSPI_Close()

void QSPI_Close ( QSPI_T qspi)

Disable QSPI controller.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None

This function will reset QSPI controller.

Definition at line 192 of file qspi.c.

◆ QSPI_DisableAutoSS()

void QSPI_DisableAutoSS ( QSPI_T qspi)

Disable the automatic slave selection function.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
None

This function will disable the automatic slave selection function and set slave selection signal to inactive state.

Definition at line 236 of file qspi.c.

◆ QSPI_DisableInt()

void QSPI_DisableInt ( QSPI_T qspi,
uint32_t  u32Mask 
)

Disable interrupt function.

Parameters
[in]qspiThe pointer of the specified QSPI module.
[in]u32MaskThe combination of all related interrupt enable bits. Each bit corresponds to a interrupt bit. This parameter decides which interrupts will be disabled. It is combination of:
Returns
None

Disable QSPI related interrupts specified by u32Mask parameter.

Definition at line 546 of file qspi.c.

◆ QSPI_EnableAutoSS()

void QSPI_EnableAutoSS ( QSPI_T qspi,
uint32_t  u32SSPinMask,
uint32_t  u32ActiveLevel 
)

Enable the automatic slave selection function.

Parameters
[in]qspiThe pointer of the specified QSPI module.
[in]u32SSPinMaskSpecifies slave selection pins. (QSPI_SS)
[in]u32ActiveLevelSpecifies the active level of slave selection signal. (QSPI_SS_ACTIVE_HIGH, QSPI_SS_ACTIVE_LOW)
Returns
None

This function will enable the automatic slave selection function. Only available in Master mode. The slave selection pin and the active level will be set in this function.

Definition at line 250 of file qspi.c.

◆ QSPI_EnableInt()

void QSPI_EnableInt ( QSPI_T qspi,
uint32_t  u32Mask 
)

Enable interrupt function.

Parameters
[in]qspiThe pointer of the specified QSPI module.
[in]u32MaskThe combination of all related interrupt enable bits. Each bit corresponds to a interrupt enable bit. This parameter decides which interrupts will be enabled. It is combination of:
Returns
None

Enable QSPI related interrupts specified by u32Mask parameter.

Definition at line 463 of file qspi.c.

◆ QSPI_GetBusClock()

uint32_t QSPI_GetBusClock ( QSPI_T qspi)

Get the actual frequency of QSPI bus clock. Only available in Master mode.

Parameters
[in]qspiThe pointer of the specified QSPI module.
Returns
Actual QSPI bus clock frequency in Hz.

This function will calculate the actual QSPI bus clock rate according to the QSPInSEL and DIVIDER settings. Only available in Master mode.

Definition at line 389 of file qspi.c.

◆ QSPI_GetIntFlag()

uint32_t QSPI_GetIntFlag ( QSPI_T qspi,
uint32_t  u32Mask 
)

Get interrupt flag.

Parameters
[in]qspiThe pointer of the specified QSPI module.
[in]u32MaskThe combination of all related interrupt sources. Each bit corresponds to a interrupt source. This parameter decides which interrupt flags will be read. It is combination of:
Returns
Interrupt flags of selected sources.

Get QSPI related interrupt flags specified by u32Mask parameter.

Definition at line 629 of file qspi.c.

◆ QSPI_GetStatus()

uint32_t QSPI_GetStatus ( QSPI_T qspi,
uint32_t  u32Mask 
)

Get QSPI status.

Parameters
[in]qspiThe pointer of the specified QSPI module.
[in]u32MaskThe combination of all related sources. Each bit corresponds to a source. This parameter decides which flags will be read. It is combination of:
Returns
Flags of selected sources.

Get QSPI related status specified by u32Mask parameter.

Definition at line 785 of file qspi.c.

◆ QSPI_Open()

uint32_t QSPI_Open ( QSPI_T qspi,
uint32_t  u32MasterSlave,
uint32_t  u32QSPIMode,
uint32_t  u32DataWidth,
uint32_t  u32BusClock 
)

This function make QSPI module be ready to transfer.

Parameters
[in]qspiThe pointer of the specified QSPI module.
[in]u32MasterSlaveDecides the QSPI module is operating in master mode or in slave mode. (QSPI_SLAVE, QSPI_MASTER)
[in]u32QSPIModeDecides the transfer timing. (QSPI_MODE_0, QSPI_MODE_1, QSPI_MODE_2, QSPI_MODE_3)
[in]u32DataWidthDecides the data width of a QSPI transaction.
[in]u32BusClockThe expected frequency of QSPI bus clock in Hz.
Returns
Actual frequency of QSPI peripheral clock.

By default, the QSPI transfer sequence is MSB first, the slave selection signal is active low and the automatic slave selection function is disabled. In Slave mode, the u32BusClock shall be NULL and the QSPI clock divider setting will be 0. The actual clock rate may be different from the target QSPI clock rate. For example, if the QSPI source clock rate is 12 MHz and the target QSPI bus clock rate is 7 MHz, the actual QSPI clock rate will be 6MHz.

Note
If u32BusClock = 0, DIVIDER setting will be set to the maximum value.
If u32BusClock >= system clock frequency, QSPI peripheral clock source will be set to APB clock and DIVIDER will be set to 0.
If u32BusClock >= QSPI peripheral clock source, DIVIDER will be set to 0.
In slave mode, the QSPI peripheral clock rate will be equal to APB clock rate.

Definition at line 43 of file qspi.c.

◆ QSPI_SetBusClock()

uint32_t QSPI_SetBusClock ( QSPI_T qspi,
uint32_t  u32BusClock 
)

Set the QSPI bus clock.

Parameters
[in]qspiThe pointer of the specified QSPI module.
[in]u32BusClockThe expected frequency of QSPI bus clock in Hz.
Returns
Actual frequency of QSPI bus clock.

This function is only available in Master mode. The actual clock rate may be different from the target QSPI bus clock rate. For example, if the QSPI source clock rate is 12 MHz and the target QSPI bus clock rate is 7 MHz, the actual QSPI bus clock rate will be 6 MHz.

Note
If u32BusClock = 0, DIVIDER setting will be set to the maximum value.
If u32BusClock >= system clock frequency, QSPI peripheral clock source will be set to APB clock and DIVIDER will be set to 0.
If u32BusClock >= QSPI peripheral clock source, DIVIDER will be set to 0.

Definition at line 267 of file qspi.c.

◆ QSPI_SetFIFO()

void QSPI_SetFIFO ( QSPI_T qspi,
uint32_t  u32TxThreshold,
uint32_t  u32RxThreshold 
)

Configure FIFO threshold setting.

Parameters
[in]qspiThe pointer of the specified QSPI module.
[in]u32TxThresholdDecides the TX FIFO threshold. It could be 0 ~ 7.
[in]u32RxThresholdDecides the RX FIFO threshold. It could be 0 ~ 7.
Returns
None

Set TX FIFO threshold and RX FIFO threshold configurations.

Definition at line 376 of file qspi.c.