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dma.c
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/*
* dma.c
*
* Created on: 13/02/2018
* Author: evandro
*/
#include "../Library-FRDM-KL25Z/dma.h"
/****************************************************************************************
*
*****************************************************************************************/
static void (*dma0_task_callback)(void);
static void (*dma1_task_callback)(void);
static void (*dma2_task_callback)(void);
static void (*dma3_task_callback)(void);
/****************************************************************************************
*
*****************************************************************************************/
const IRQn_Type dma_irq[NUMBER_CHANNEL] =
{
DMA0_IRQn,
DMA1_IRQn,
DMA2_IRQn,
DMA3_IRQn
};
uint8_t dma_number_byte[NUMBER_CHANNEL];
/****************************************************************************************
*
*****************************************************************************************/
void dma_init(dma_config_t config)
{
SIM_SCGC6 |= SIM_SCGC6_DMAMUX_MASK;
SIM_SCGC7 |= SIM_SCGC7_DMA_MASK;
DMA0->DMA[config.channel].DAR = (uint32_t)config.destination_address;
DMA0->DMA[config.channel].SAR = (uint32_t)config.source_address;
DMA0->DMA[config.channel].DSR_BCR = DMA_DSR_BCR_BCR( config.number_byte );
DMA0->DMA[config.channel].DCR = 0;
DMA0->DMA[config.channel].DCR |= DMA_DCR_EINT_MASK;
DMA0->DMA[config.channel].DCR |= DMA_DCR_ERQ( config.peripheral_request );
DMA0->DMA[config.channel].DCR |= DMA_DCR_CS( config.cycle_steal );
DMA0->DMA[config.channel].DCR |= DMA_DCR_SSIZE( config.source_size );
DMA0->DMA[config.channel].DCR |= DMA_DCR_DSIZE( config.destination_size );
DMA0->DMA[config.channel].DCR |= DMA_DCR_DINC( config.destination_increment );
DMA0->DMA[config.channel].DCR |= DMA_DCR_SMOD( config.source_address_modulo );
DMA0->DMA[config.channel].DCR |= DMA_DCR_DMOD( config.destination_address_modulo );
DMA0->DMA[config.channel].DCR |= DMA_DCR_START( config.start_transfer );
DMAMUX0->CHCFG[config.channel] |= DMAMUX_CHCFG_ENBL_MASK;
DMAMUX0->CHCFG[config.channel] |= DMAMUX_CHCFG_SOURCE( config.channel_source );
NVIC_EnableIRQ( dma_irq[config.channel] );
dma_number_byte[config.channel] = (uint8_t)config.number_byte;
// number = (uint8_t)config.number_byte;
}
/****************************************************************************************
*
*****************************************************************************************/
void dma0_callback(void (*task)(void))
{
if(task != NULL)
dma0_task_callback = task;
}
/****************************************************************************************
*
*****************************************************************************************/
void dma1_callback(void (*task)(void))
{
if(task != NULL)
dma1_task_callback = task;
}
/****************************************************************************************
*
*****************************************************************************************/
void dma2_callback(void (*task)(void))
{
if(task != NULL)
dma2_task_callback = task;
}
/****************************************************************************************
*
*****************************************************************************************/
void dma3_callback(void (*task)(void))
{
if(task != NULL)
dma3_task_callback = task;
}
/****************************************************************************************
*
*****************************************************************************************/
void DMA0_IRQHandler(void)
{
DMA0->DMA[0].DSR_BCR |= DMA_DSR_BCR_DONE_MASK;
DMA0->DMA[0].DSR_BCR |= DMA_DSR_BCR_BCR( dma_number_byte[0] );
dma0_task_callback();
}
/****************************************************************************************
*
*****************************************************************************************/
void DMA1_IRQHandler(void)
{
DMA0->DMA[1].DSR_BCR |= DMA_DSR_BCR_DONE_MASK;
DMA0->DMA[1].DSR_BCR |= DMA_DSR_BCR_BCR( dma_number_byte[1] );
dma1_task_callback();
}
/****************************************************************************************
*
*****************************************************************************************/
void DMA2_IRQHandler(void)
{
DMA0->DMA[2].DSR_BCR |= DMA_DSR_BCR_DONE_MASK;
DMA0->DMA[2].DSR_BCR |= DMA_DSR_BCR_BCR( dma_number_byte[2] );
dma2_task_callback();
}
/****************************************************************************************
*
*****************************************************************************************/
void DMA3_IRQHandler(void)
{
DMA0->DMA[3].DSR_BCR |= DMA_DSR_BCR_DONE_MASK;
DMA0->DMA[3].DSR_BCR |= DMA_DSR_BCR_BCR( dma_number_byte[3] );
dma3_task_callback();
}
/*****************************************************************************************/