Flash Examples

Table of Contents

• API-FLASH-CASE1:FLASH READ/WRITE PAGE
• API-FLASH-CASE2:FLASH ERASE SECTOR
• API-FLASH-CASE3:FLASH READ/WRITE STATUS
• API-FLASH-CASE4:FLASH DEEP POWER DOWN/RELEASE
• API-FLASH-CASE5:FLASH READ MID/UID
• API-FLASH-CASE6:FLASH LOCK
• API-FLASH-CASE7:FLASH UNLOCK

Variables used in the following cases are defined as below

#define FLASH_ADDR              0x020000
#define FLASH_BUFF_LEN          256

volatile unsigned char Flash_Read_Buff[FLASH_BUFF_LEN]={0};
volatile unsigned char Flash_Write_Buff[FLASH_BUFF_LEN]=
{       0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,
        0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,
        0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,
        0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,
        0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,
        0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,
        0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,
        0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,


        0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,
        0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,
        0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,
        0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,
        0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,
        0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,
        0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,
        0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,

        0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,
        0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,
        0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,
        0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,
        0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,
        0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,
        0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,
        0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,

        0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,
        0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,
        0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,
        0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,
        0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,
        0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,
        0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,
        0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,
};

volatile unsigned char status;
unsigned char mid_buf[4]={0};
unsigned char uid_buf[16]={0};

API-FLASH-CASE1:FLASH READ/WRITE PAGE

Function	Sub-Function	APIs		Description	Update Status
irq_handler()	None			Interrupt handler function [Mandatory]	2019-1-10
main()	cpu_wakeup_init()			CPU initialization function [Mandatory]
	clock_init()	clock_init(SYS_CLK_24M_Crystal)		Clock initialization function, System Clock is 24M RC by default [optional]
	rf_drv_init()	rf_drv_init(RF_MODE_BLE_1M)		RF mode initialization [optional]
	gpio_init()	gpio_init(1)		GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	flash_write_page()	flash_write_page(FLASH_ADDR,FLASH_BUFF_LEN,(unsigned char *)Flash_Write_Buff)	write 256 bytes to the specified address of flash
		flash_read_page()	flash_read_page(FLASH_ADDR,FLASH_BUFF_LEN,(unsigned char *)Flash_Read_Buff)	read 256 bytes from the specified address of flash to check whether the written data is right
	main_loop()	None		Main program loop

API-FLASH-CASE2:FLASH ERASE SECTOR

Function	Sub-Function	APIs		Description	Update Status
irq_handler()	None			Interrupt handler function [Mandatory]	2019-1-10
main()	cpu_wakeup_init()			CPU initialization function [Mandatory]
	clock_init()	clock_init(SYS_CLK_24M_Crystal)		Clock initialization function, System Clock is 24M RC by default [optional]
	rf_drv_init()	rf_drv_init(RF_MODE_BLE_1M)		RF mode initialization [optional]
	gpio_init()	gpio_init(1)		GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	flash_erase_sector()	flash_erase_sector(FLASH_ADDR)	erase a sector from the specified address of flash
	main_loop()	None		Main program loop

API-FLASH-CASE3:FLASH READ/WRITE STATUS

Function	Sub-Function	APIs		Description	Update Status
irq_handler()	None			Interrupt handler function [Mandatory]	2019-1-10
main()	cpu_wakeup_init()			CPU initialization function [Mandatory]
	clock_init()	clock_init(SYS_CLK_24M_Crystal)		Clock initialization function, System Clock is 24M RC by default [optional]
	rf_drv_init()	rf_drv_init(RF_MODE_BLE_1M)		RF mode initialization [optional]
	gpio_init()	gpio_init(1)		GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	status = flash_read_status()		read the status of flash
		flash_write_status()	status = flash_write_status(0x04)	write the status of flash
	main_loop()	None		Main program loop

API-FLASH-CASE4:FLASH DEEP POWER DOWN/RELEASE

Function	Sub-Function	APIs		Description	Update Status
irq_handler()	None			Interrupt handler function [Mandatory]	2019-1-10
main()	cpu_wakeup_init()			CPU initialization function [Mandatory]
	clock_init()	clock_init(SYS_CLK_24M_Crystal)		Clock initialization function, System Clock is 24M RC by default [optional]
	rf_drv_init()	rf_drv_init(RF_MODE_BLE_1M)		RF mode initialization [optional]
	gpio_init()	gpio_init(1)		GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	flash_deep_powerdown()		put the device in the lowest consumption mode
		flash_release_deep_powerdown()		wake up the device from the lowest consumption mode
	main_loop()	None		Main program loop

API-FLASH-CASE5:FLASH READ MID/UID

Function	Sub-Function	APIs		Description	Update Status
irq_handler()	None			Interrupt handler function [Mandatory]	2019-1-10
main()	cpu_wakeup_init()			CPU initialization function [Mandatory]
	clock_init()	clock_init(SYS_CLK_24M_Crystal)		Clock initialization function, System Clock is 24M RC by default [optional]
	rf_drv_init()	rf_drv_init(RF_MODE_BLE_1M)		RF mode initialization [optional]
	gpio_init()	gpio_init(1)		GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	flash_read_mid()	flash_read_mid(mid_buf)	read MID of flash
		flash_read_uid()	flash_read_uid(FLASH_READ_UID_CMD,uid_buf)	read UID of flash
	main_loop()	None		Main program loop

API-FLASH-CASE6:FLASH LOCK

Function	Sub-Function	APIs		Description	Update Status
irq_handler()	None			Interrupt handler function [Mandatory]	2019-1-10
main()	cpu_wakeup_init()			CPU initialization function [Mandatory]
	clock_init()	clock_init(SYS_CLK_24M_Crystal)		Clock initialization function, System Clock is 24M RC by default [optional]
	rf_drv_init()	rf_drv_init(RF_MODE_BLE_1M)		RF mode initialization [optional]
	gpio_init()	gpio_init(1)		GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	flash_lock()	flash_lock(FLASH_TYPE_GD, 0x1c)	lock first 512k bytes of flash
	main_loop()	None		Main program loop

API-FLASH-CASE6:FLASH UNLOCK

Function	Sub-Function	APIs		Description	Update Status
irq_handler()	None			Interrupt handler function [Mandatory]	2019-1-10
main()	cpu_wakeup_init()			CPU initialization function [Mandatory]
	clock_init()	clock_init(SYS_CLK_24M_Crystal)		Clock initialization function, System Clock is 24M RC by default [optional]
	rf_drv_init()	rf_drv_init(RF_MODE_BLE_1M)		RF mode initialization [optional]
	gpio_init()	gpio_init(1)		GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	flash_unlock()	flash_unlock(FLASH_TYPE_GD)	unlock the whole flash
	main_loop()	None		Main program loop

History Record

Date	Description	Author
2019-1-10	initial release	LJW