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risc-v/esp32c3: Add burst transfer support for GDMA

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This commit is contained in:
Gustavo Henrique Nihei 2021-05-11 13:37:58 -03:00 committed by Abdelatif Guettouche
parent 5ec3ef0e56
commit 132ffdd28d
2 changed files with 26 additions and 7 deletions
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29
arch/risc-v/src/esp32c3/esp32c3_dma.c
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@ -81,9 +81,10 @@ static sem_t g_dma_exc_sem = SEM_INITIALIZER(1);
* Request DMA channel and config it with given parameters.
*
* Input Parameters:
* periph - Peripheral for which the DMA channel request was made
* tx_prio - Interrupt priority
* rx_prio - Interrupt flags
* periph - Peripheral for which the DMA channel request was made
* tx_prio - Interrupt priority
* rx_prio - Interrupt flags
* burst_en - Enable burst transmission
*
* Returned Value:
* DMA channel number (>=0) if success or -1 if fail.
@ -92,7 +93,8 @@ static sem_t g_dma_exc_sem = SEM_INITIALIZER(1);
int32_t esp32c3_dma_request(enum esp32c3_dma_periph_e periph,
uint32_t tx_prio,
uint32_t rx_prio)
uint32_t rx_prio,
bool burst_en)
{
int chan;
@ -145,12 +147,27 @@ int32_t esp32c3_dma_request(enum esp32c3_dma_periph_e periph,
CLR_BITS(DMA_IN_CONF0_CH0_REG, chan, DMA_MEM_TRANS_EN_CH0_M);
/* Connect DMA TX/RX channel to a given peripheral */
/* Connect DMA TX/RX channels to a given peripheral */
SET_REG(DMA_OUT_PERI_SEL_CH0_REG, chan, periph);
SET_REG(DMA_IN_PERI_SEL_CH0_REG, chan, periph);
}
if (burst_en)
{
/* Enable DMA TX/RX channels burst sending data */
SET_BITS(DMA_IN_CONF0_CH0_REG, chan, DMA_OUT_DATA_BURST_EN_CH0_M);
SET_BITS(DMA_IN_CONF0_CH0_REG, chan, DMA_IN_DATA_BURST_EN_CH0_M);
/* Enable DMA TX/RX channels burst reading descriptor link */
SET_BITS(DMA_IN_CONF0_CH0_REG, chan, DMA_OUTDSCR_BURST_EN_CH0_M);
SET_BITS(DMA_IN_CONF0_CH0_REG, chan, DMA_INDSCR_BURST_EN_CH0_M);
}
/* Set priority for DMA TX/RX channels */
SET_REG(DMA_OUT_PRI_CH0_REG, chan, tx_prio);
SET_REG(DMA_IN_PRI_CH0_REG, chan, rx_prio);
@ -435,7 +452,7 @@ void esp32c3_dma_main(int argc, char *argv[])
esp32c3_dma_init();
chan = esp32c3_dma_request(ESP32C3_DMA_PERIPH_MEM, 1, 1);
chan = esp32c3_dma_request(ESP32C3_DMA_PERIPH_MEM, 1, 1, false);
if (chan < 0)
{
syslog(LOG_ERR, "Request DMA channel error\n");

4
arch/risc-v/src/esp32c3/esp32c3_dma.h
View File

@ -26,6 +26,7 @@
#define __ARCH_RISCV_SRC_ESP32C3_ESP32C3_DMA_H
#include <nuttx/config.h>
#include <stdbool.h>
#include <stdint.h>
#ifndef __ASSEMBLY__
@ -122,7 +123,8 @@ struct esp32c3_dmadesc_s
int32_t esp32c3_dma_request(enum esp32c3_dma_periph_e periph,
uint32_t tx_prio,
uint32_t rx_prio);
uint32_t rx_prio,
bool burst_en);
/****************************************************************************
* Name: esp32c3_dma_setup