int main(void)
{
//! [sample_resource]
struct dma_resource example_resource;
//! [sample_resource]
system_init();
//! [setup_init]
//! [setup_dma_resource]
configure_dma_resource(&example_resource);
//! [setup_dma_resource]
//! [setup_transfer_descriptor]
setup_transfer_descriptor(&example_descriptor);
//! [setup_transfer_descriptor]
//! [add_descriptor_to_dma_resource]
dma_add_descriptor(&example_resource, &example_descriptor);
//! [add_descriptor_to_dma_resource]
//! [setup_callback_register]
dma_register_callback(&example_resource, transfer_done,
DMA_CALLBACK_TRANSFER_DONE);
//! [setup_callback_register]
//! [setup_enable_callback]
dma_enable_callback(&example_resource, DMA_CALLBACK_TRANSFER_DONE);
//! [setup_enable_callback]
//! [setup_source_memory_content]
for (uint32_t i = 0; i < DATA_LENGTH; i++) {
source_memory[i] = i;
}
//! [setup_source_memory_content]
//! [setup_init]
//! [main]
//! [main_1]
dma_start_transfer_job(&example_resource);
//! [main_1]
//! [main_1_1]
dma_trigger_transfer(&example_resource);
//! [main_1_1]
//! [main_2]
while (!transfer_is_done) {
/* Wait for transfer done */
}
//! [main_2]
while (true) {
/* Nothing to do */
}
//! [main]
}
/**
* \brief Config DMA to make peripheral-to-memory transfer scrolling string to
* SLCD memory.
*/
static void configure_dma(void)
{
configure_dma_resource(&example_resource);
setup_transfer_descriptor(&example_descriptor);
if (STATUS_OK != dma_add_descriptor(&example_resource,
&example_descriptor)) {
printf("Descriptor status error\n\n\r");
}
dma_register_callback(&example_resource, dma_callback,
DMA_CALLBACK_TRANSFER_DONE);
dma_enable_callback(&example_resource, DMA_CALLBACK_TRANSFER_DONE);
}
/**
* \brief configure and enable DMA multiple channel (in this case it is 3)
*/
void configure_dma(void)
{
/* Configure DMA channel 0 */
configure_dma_resource(&dmac_adc_channel0, DMAC_CHANNEL0_ID);
/* Configure descriptor for channel 1 */
setup_transfer_descriptor(&dmac_adc_descriptor1, DMAC_DESCRIPTOR1_ID);
/* Assign descriptor 1 to DMA channel 0 */
dma_add_descriptor(&dmac_adc_channel0, &dmac_adc_descriptor1);
/*
* Register call back for DMA channel 0 transfer complete interrupt
* which will get triggered for every block transfer (I.e. 1024 beats
* in this case
*/
dma_register_callback(&dmac_adc_channel0, dmac_calback_channel0,
DMA_CALLBACK_TRANSFER_DONE);
/* Enable Call back for channel 0 */
dma_enable_callback(&dmac_adc_channel0, DMA_CALLBACK_TRANSFER_DONE);
/* Enable DMA channel 0 and its interrupt */
dma_start_transfer_job(&dmac_adc_channel0);
}