dma.h File Reference

DMA Controller. More...

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Macros
#define	PI_DRAM_ADDR   ((volatile uint32_t*)0xA4600000)
	PI DMA: DRAM address register.
#define	PI_CART_ADDR   ((volatile uint32_t*)0xA4600004)
	PI DMA: cartridge address register.
#define	PI_RD_LEN   ((volatile uint32_t*)0xA4600008)
	PI DMA: read length register.
#define	PI_WR_LEN   ((volatile uint32_t*)0xA460000C)
	PI DMA: write length register.
#define	PI_STATUS   ((volatile uint32_t*)0xA4600010)
	PI: status register.

Functions
void	dma_write_raw_async (const void *ram_address, unsigned long pi_address, unsigned long len)
	Start writing data to a peripheral through PI DMA (low-level)
void	dma_write (const void *ram_address, unsigned long pi_address, unsigned long len)
	Write to a peripheral.
void	dma_read_raw_async (void *ram_address, unsigned long pi_address, unsigned long len)
	Start reading data from a peripheral through PI DMA (low-level)
void	dma_read_async (void *ram_address, unsigned long pi_address, unsigned long len)
	Start reading data from a peripheral through PI DMA.
void	dma_read (void *ram_address, unsigned long pi_address, unsigned long len)
	Read data from a peripheral through PI DMA, waiting for completion.
void	dma_wait (void)
	Wait until an async DMA or I/O transfer is finished.
uint32_t	io_read (uint32_t pi_address)
	Read a 32 bit integer from a peripheral using the CPU.
void	io_write (uint32_t pi_address, uint32_t data)
	Write a 32 bit integer to a peripheral using the CPU.
bool	io_accessible (uint32_t pi_address)
	Check whether the specified PI address can be accessed doing I/O from CPU.
volatile int	dma_busy (void)
	Return whether the DMA controller is currently busy.

Detailed Description

DMA Controller.