void dma_set_per_addr(dma_dev *dev, dma_channel channel, volatile void *addr) {
dma_channel_reg_map *chan_regs;
ASSERT_FAULT(!dma_is_channel_enabled(dev, channel));
chan_regs = dma_channel_regs(dev, channel);
chan_regs->CPAR = (uint32)addr;
}
/**
* @brief Set the base memory address where data will be read from or
* written to.
*
* You must not call this function while the channel is enabled.
*
* If the DMA memory size is 16 bits, the address is automatically
* aligned to a half-word. If the DMA memory size is 32 bits, the
* address is aligned to a word.
*
* @param dev DMA Device
* @param channel Channel whose base memory address to set.
* @param addr Memory base address to use.
*/
void dma_set_mem_addr(dma_dev *dev, dma_channel channel, __io void *addr) {
dma_channel_reg_map *chan_regs;
ASSERT_FAULT(!dma_is_channel_enabled(dev, channel));
chan_regs = dma_channel_regs(dev, channel);
chan_regs->CMAR = (uint32)addr;
}
void dma_set_num_transfers(dma_dev *dev,
dma_channel channel,
uint16 num_transfers) {
dma_channel_reg_map *channel_regs;
ASSERT_FAULT(!dma_is_channel_enabled(dev, channel));
channel_regs = dma_channel_regs(dev, channel);
channel_regs->CNDTR = num_transfers;
}
void dma_set_priority(dma_dev *dev,
dma_channel channel,
dma_priority priority) {
dma_channel_reg_map *channel_regs;
uint32 ccr;
ASSERT_FAULT(!dma_is_channel_enabled(dev, channel));
channel_regs = dma_channel_regs(dev, channel);
ccr = channel_regs->CCR;
ccr &= ~DMA_CCR_PL;
ccr |= (priority << 12);
channel_regs->CCR = ccr;
}