stm32f1_dma.c File Reference

#include <cfg/arch.h>
#include <arch/cm3.h>
#include <dev/irqreg.h>
#include <arch/cm3/cortex_interrupt.h>
#include <arch/cm3/stm/stm32_dma.h>

Include dependency graph for stm32f1_dma.c:

Functions
void	DMA_Setup (uint8_t ch, void *dst, void *src, uint16_t length, uint32_t flags)
void	DMA_Enable (uint8_t ch)
void	DMA_Disable (uint8_t ch)
void	DMA_Init (void)
	DMA System Initialization.
void	DMA_IrqMask (uint8_t ch, uint32_t mask, uint8_t ena)
	Control DMA channel interrupt masks.
void	DMA_ClearFlag (uint8_t ch, uint32_t flags)
	Clear DMA channel flags.
uint32_t	DMA_GetFlag (uint8_t ch)
	Get DMA channel flags.
Variables
const DMATAB	DmaTab []
	Table to align channels and interrupts for simpler access.
const uint8_t	DMACount = sizeof(DmaTab)/sizeof(DMATAB)
const DMATAB *	DmaTab1 = &DmaTab[0]

---

Function Documentation

void DMA_Setup	(	uint8_t	ch,
		void *	dst,
		void *	src,
		uint16_t	length,
		uint32_t	flags
	)

References DMA_Channel_TypeDef::CCR, DMA_Channel_TypeDef::CMAR, DMA_Channel_TypeDef::CNDTR, DMA_Channel_TypeDef::CPAR, DMA_CCR1_DIR, DMA_CCR1_EN, DMA_CCR1_MEM2MEM, DMA_CCR2_DIR, DMATAB::dma_ch, and PERIPH_BASE.

void DMA_Enable

(

uint8_t

ch

)

References DMA_Channel_TypeDef::CCR, and DMA_CCR1_EN.

void DMA_Disable

(

uint8_t

ch

)

References DMA_Channel_TypeDef::CCR, and DMA_CCR1_EN.

void DMA_Init

(

void

)

DMA System Initialization.

Register all DMA interrupt handlers.

References DMA_Channel_TypeDef::CCR, DMA1, DMA2, DMA_ClearFlag(), RCC, RCC_AHBENR_DMA1EN, RCC_AHBENR_DMA2EN, and STM_HAS_DMA1.

Here is the call graph for this function:

void DMA_IrqMask	(	uint8_t	ch,
		uint32_t	mask,
		uint8_t	ena
	)

Control DMA channel interrupt masks.

Setup interrupt mask on given channel. Channel numbers are from 0..n while documentation numbers them from 1..n. For that please use the defines DMAx_Cn.

Parameters:

ch	Channel number to set interrupt mask.
mask	Mask to set on the designated channel interrupts.
ena	Enable (1) or Disable (0) the bits in the mask.

References DMA_Channel_TypeDef::CCR, DMA_FLAGMASK, DMATAB::fofs, and DMA_TypeDef::IFCR.

void DMA_ClearFlag	(	uint8_t	ch,
		uint32_t	flags
	)

Clear DMA channel flags.

Setup interrupt mask on given channel. Channel numbers are from 0..n while documentation numbers them from 1..n. For that please use the defines DMAx_Cn.

Parameters:

ch	Channel number.
flags	Mask of flags to clear.

References DMA_FLAGMASK, and DMA_TypeDef::IFCR.

uint32_t DMA_GetFlag

(

uint8_t

ch

)

Get DMA channel flags.

Get interrupt / status flags of given channel.

Parameters:

ch	Channel number to set interrupt mask.

Returns:

flags Mask of flags to clear.

References DMA_FLAGMASK, DMATAB::fofs, and DMA_TypeDef::ISR.

---

Variable Documentation

const DMATAB DmaTab[]

Initial value:

 {
    { DMA1_BASE,  0, DMA1_Channel1 },
    { DMA1_BASE,  4, DMA1_Channel2 },
    { DMA1_BASE,  8, DMA1_Channel3 },
    { DMA1_BASE, 12, DMA1_Channel4 },
    { DMA1_BASE, 16, DMA1_Channel5 },
    { DMA1_BASE, 20, DMA1_Channel6 },
    { DMA1_BASE, 24, DMA1_Channel7 },















}

Table to align channels and interrupts for simpler access.

const uint8_t DMACount = sizeof(DmaTab)/sizeof(DMATAB)

const DMATAB* DmaTab1 = &DmaTab[0]