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libdragon
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DMA Controller. More...
Macros | |
PI Status Register Bit Definitions | |
#define | PI_STATUS_DMA_BUSY ( 1 << 0 ) |
PI DMA Busy. | |
#define | PI_STATUS_IO_BUSY ( 1 << 1 ) |
PI IO Busy. | |
#define | PI_STATUS_ERROR ( 1 << 2 ) |
PI Error. | |
Functions | |
bool | io_accessible (uint32_t pi_address) |
Check whether the specified PI address can be accessed doing I/O from CPU. More... | |
volatile int | dma_busy (void) |
Return whether the DMA controller is currently busy. More... | |
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) More... | |
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) More... | |
void | dma_read_async (void *ram_pointer, unsigned long pi_address, unsigned long len) |
Start reading data from a peripheral through PI DMA. More... | |
void | dma_wait (void) |
Wait until an async DMA or I/O transfer is finished. | |
void | dma_read (void *ram_address, unsigned long pi_address, unsigned long len) |
Read data from a peripheral through PI DMA, waiting for completion. More... | |
void | dma_write (const void *ram_address, unsigned long rom_address, unsigned long len) |
Write to a peripheral. More... | |
uint32_t | io_read (uint32_t pi_address) |
Read a 32 bit integer from a peripheral using the CPU. More... | |
void | io_write (uint32_t pi_address, uint32_t data) |
Write a 32 bit integer to a peripheral using the CPU. More... | |
DMA Controller.