Module stm32_hal2::dma [−][src]
Expand description
Direct Memory Access (DMA). This module handles initialization, and transfer
configuration for DMA. The Dma::cfg_channel
method is called by modules that use DMA.
Structs
ChannelCfg | This struct is used to pass common (non-peripheral and non-use-specific) data when configuring a channel. |
Dma | Represents a Direct Memory Access (DMA) peripheral. |
Enums
Circular | Set in CCR. Can only be set when channel is disabled. |
DataSize | Peripheral and memory increment mode. (CCR PSIZE and MSIZE bits) Can only be set when channel is disabled. |
Direction | Set in CCR. Can only be set when channel is disabled. |
DmaChannel | Represents a DMA channel to select, eg when configuring for use with a peripheral. |
DmaInput | A list of DMA input sources. The integer values represent their DMAMUX register value, on MCUs that use this. G4 RM, Table 91: DMAMUX: Assignment of multiplexer inputs to resources. |
DmaInterrupt | Interrupt type. Set in CCR using TEIE, HTIE, and TCIE bits. Can only be set when channel is disabled. |
IncrMode | Peripheral and memory increment mode. (CCR PINC and MINC bits) Can only be set when channel is disabled. |
Priority | L4 RM, 11.4.3, “DMA arbitration”: The priorities are managed in two stages: • software: priority of each channel is configured in the DMA_CCRx register, to one of the four different levels: – very high – high – medium – low • hardware: if two requests have the same software priority level, the channel with the lowest index gets priority. For example, channel 2 gets priority over channel 4. Only write to this when the channel is disabled. |