AN4570 datasheet(20/46 Pages) STMICROELECTRONICS

Part #	AN4570

Description	This application note describes how to use the high-density

PDF	46 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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20 / 46 page

Interfacing with a non-multiplexed, asynchronous 16-bit NOR Flash memory

AN4570

20/46

DocID026804 Rev 1

/**

* @brief

NOR BSP Wait for Ready/Busy signal.

* @param

hnor: Pointer to NOR handle

* @param

Timeout: Timeout duration

* @retval None

void HAL_NOR_MspWait(NOR_HandleTypeDef *hnor,

uint32_t Timeout)

{

uint32_t timeout = Timeout;

/* Polling on Ready/Busy signal */

while((HAL_GPIO_ReadPin(NOR_READY_BUSY_GPIO,

NOR_READY_BUSY_PIN) != NOR_BUSY_STATE) && (timeout

> 0))

{

timeout--;

}

timeout = Timeout;

/* Polling on Ready/Busy signal */

while((HAL_GPIO_ReadPin(NOR_READY_BUSY_GPIO,

NOR_READY_BUSY_PIN) != NOR_READY_STATE) && (timeout

> 0))

{

timeout--;

}

/**

* @brief

Writes an amount of data to the NOR device.

* @param

uwStartAddress: Write start address

* @param

pData: Pointer to data to be written

* @param

uwDataSize: Size of data to write

* @retval NOR memory status

uint8_t NOR_WriteData(uint32_t uwStartAddress,

uint16_t* pData,

uint32_t uwDataSize)

{

uint32_t index = uwDataSize;

while(index > 0)

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