S3C44B0
[Ports]

Functions
void	rt_hw_cpu_icache_enable ()
void	rt_hw_cpu_icache_disable ()
rt_base_t	rt_hw_cpu_icache_status ()
void	rt_hw_cpu_dcache_enable ()
void	rt_hw_cpu_dcache_disable ()
rt_base_t	rt_hw_cpu_dcache_status ()
void	rt_hw_cpu_reset ()
void	rt_hw_cpu_shutdown ()
void	rt_hw_interrupt_init ()
void	rt_hw_interrupt_mask (int vector)
void	rt_hw_interrupt_umask (int vector)
void	rt_hw_interrupt_install (int vector, rt_isr_handler_t new_handler, rt_isr_handler_t *old_handler)
void	rt_console_puts (const char *str)
void	rt_serial_init (void)
char	rt_serial_getc ()
void	rt_serial_putc (const char c)
rt_uint8_t *	rt_hw_stack_init (void *tentry, void *parameter, rt_uint8_t *stack_addr, void *texit)
void	rt_hw_show_register (struct rt_hw_register *regs)
void	rt_hw_trap_udef (struct rt_hw_register *regs)
void	rt_hw_trap_swi (struct rt_hw_register *regs)
void	rt_hw_trap_pabt (struct rt_hw_register *regs)
void	rt_hw_trap_dabt (struct rt_hw_register *regs)
void	rt_hw_trap_resv (struct rt_hw_register *regs)

---

Detailed Description

• 2.5V Static ARM7TDMI CPU core with 8KB cache . (SAMBA II bus architecture up to 66MHz)
• External memory controller. (FP/EDO/SDRAM Control, Chip Select logic)
• LCD controller (up to 256 color DSTN) with 1-ch LCD-dedicated DMA.
• 2-ch general DMAs / 2-ch peripheral DMAs with external request pins
• 2-ch UART with handshake(IrDA1.0, 16-byte FIFO) / 1-ch SIO
• 1-ch multi-master IIC-BUS controller
• 1-ch IIS-BUS controller
• 5-ch PWM timers & 1-ch internal timer
• Watch Dog Timer
• 71 general purpose I/O ports / 8-ch external interrupt source
• Power control: Normal, Slow, Idle, and Stop mode
• 8-ch 10-bit ADC.
• RTC with calendar function.
• On-chip clock generator with PLL

---

Function Documentation

void rt_console_puts

(

const char *

str

)

This function is used to display a string on console, normally, it's invoked by rt_kprintf

Parameters:

str

the displayed string

This function is used to display a string on console, normally, it's invoked by rt_kprintf

Parameters:

str

the displayed string

This function is used to display a string on console, normally, it's invoked by rt_kprintf

Parameters:

str

the displayed string

This function is used to display a string on console, normally, it's invoked by rt_kprintf

Parameters:

str

the displayed string

void rt_hw_cpu_dcache_disable

(

void

)

this function will disable D-Cache of CPU

void rt_hw_cpu_dcache_enable

(

void

)

this function will enable D-Cache of CPU

rt_base_t rt_hw_cpu_dcache_status

(

void

)

this function will get the status of D-Cache

void rt_hw_cpu_icache_disable

(

void

)

This function will disable I-Cache of CPU

void rt_hw_cpu_icache_enable

(

void

)

This function will enable I-Cache of CPU

rt_base_t rt_hw_cpu_icache_status

(

void

)

this function will get the status of I-Cache

void rt_hw_cpu_reset

(

void

)

this function will reset CPU

void rt_hw_cpu_shutdown

(

void

)

this function will shutdown CPU

void rt_hw_interrupt_init

(

void

)

This function will initialize hardware interrupt

void rt_hw_interrupt_install	(	int	vector,
		rt_isr_handler_t	new_handler,
		rt_isr_handler_t *	old_handler
	)

This function will install a interrupt service routine to a interrupt.

Parameters:

	vector	the interrupt number
	new_handler	the interrupt service routine to be installed
	old_handler	the old interrupt service routine

void rt_hw_interrupt_mask

(

int

vector

)

This function will mask a interrupt.

Parameters:

vector

the interrupt number

void rt_hw_interrupt_umask

(

int

vector

)

This function will un-mask a interrupt.

Parameters:

vector

the interrupt number

void rt_hw_show_register

(

struct rt_hw_register *

regs

)

this function will show registers of CPU

Parameters:

regs

the registers point

rt_uint8_t* rt_hw_stack_init	(	void *	tentry,
		void *	parameter,
		rt_uint8_t *	stack_addr,
		void *	texit
	)

This function will initialize thread stack

Parameters:

	tentry	the entry of thread
	parameter	the parameter of entry
	stack_addr	the beginning stack address
	texit	the function will be called when thread exit

Returns:

stack address

void rt_hw_trap_dabt

(

struct rt_hw_register *

regs

)

An abort indicates that the current memory access cannot be completed, which occurs during a data access.

Parameters:

regs

system registers

Note:

never invoke this function in application

void rt_hw_trap_pabt

(

struct rt_hw_register *

regs

)

An abort indicates that the current memory access cannot be completed, which occurs during an instruction prefetch.

Parameters:

regs

system registers

Note:

never invoke this function in application

void rt_hw_trap_resv

(

struct rt_hw_register *

regs

)

Normally, system will never reach here

Parameters:

regs

system registers

Note:

never invoke this function in application

void rt_hw_trap_swi

(

struct rt_hw_register *

regs

)

The software interrupt instruction (SWI) is used for entering Supervisor mode, usually to request a particular supervisor function.

Parameters:

regs

system registers

Note:

never invoke this function in application

void rt_hw_trap_udef

(

struct rt_hw_register *

regs

)

When ARM7TDMI comes across an instruction which it cannot handle, it takes the undefined instruction trap.

Parameters:

regs

system registers

Note:

never invoke this function in application

char rt_serial_getc

(

void

)

This function read a character from serial without interrupt enable mode

Returns:

the read char

void rt_serial_init

(

void

)

This function initializes serial

void rt_serial_putc

(

const char

c

)

This function will write a character to serial without interrupt enable mode

Parameters:

c

the char to write