ref/dma_8h_source.html

#ifndef __LIBDRAGON_DMA_H

#define __LIBDRAGON_DMA_H


#include <stdbool.h>


#ifdef __cplusplus

extern "C" {

#endif


void dma_write_raw_async(const void *ram_address, unsigned long pi_address, unsigned long len);

void dma_write(const void * ram_address, unsigned long pi_address, unsigned long len);


void dma_read_raw_async(void *ram_address, unsigned long pi_address, unsigned long len);

void dma_read_async(void *ram_address, unsigned long pi_address, unsigned long len);

void dma_read(void * ram_address, unsigned long pi_address, unsigned long len);


void dma_wait(void);


/* 32 bit IO read from PI device */

uint32_t io_read(uint32_t pi_address);


/* 32 bit IO write to PI device */

void io_write(uint32_t pi_address, uint32_t data);


bool io_accessible(uint32_t pi_address);


__attribute__((deprecated("use dma_wait instead")))

volatile int dma_busy(void);


#ifdef __cplusplus

}

#endif


#endif

dma_read_async
void dma_read_async(void *ram_address, unsigned long pi_address, unsigned long len)
Start reading data from a peripheral through PI DMA.
Definition: dma.c:281

dma_write_raw_async
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)
Definition: dma.c:168

io_read
uint32_t io_read(uint32_t pi_address)
Read a 32 bit integer from a peripheral using the CPU.
Definition: dma.c:435

dma_read
void dma_read(void *ram_address, unsigned long pi_address, unsigned long len)
Read data from a peripheral through PI DMA, waiting for completion.
Definition: dma.c:390

io_accessible
bool io_accessible(uint32_t pi_address)
Check whether the specified PI address can be accessed doing I/O from CPU.
Definition: dma.c:80

dma_write
void dma_write(const void *ram_address, unsigned long pi_address, unsigned long len)
Write to a peripheral.
Definition: dma.c:415

dma_wait
void dma_wait(void)
Wait until an async DMA or I/O transfer is finished.
Definition: dma.c:366

dma_busy
volatile int dma_busy(void)
Return whether the DMA controller is currently busy.
Definition: dma.c:107

io_write
void io_write(uint32_t pi_address, uint32_t data)
Write a 32 bit integer to a peripheral using the CPU.
Definition: dma.c:463

dma_read_raw_async
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)
Definition: dma.c:132