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xtensa/esp32s2: add initial support for I2S 

Add initial support for the I2S peripheral on ESP32S2.
Add I2S character driver and generic I2S audio driver.
Include i2schar defconfig for ESP32-S2-Saola-1 board.
This commit is contained in:
Tiago Medicci Serrano 2022-10-07 13:18:32 -03:00 committed by Xiang Xiao
parent 1c416b1712
commit 16b99ee013
13 changed files with 2516 additions and 209 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

122
arch/xtensa/src/esp32s2/Kconfig
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@ -205,7 +205,7 @@ choice ESP32S2_FLASH_FREQ
default ESP32S2_FLASH_FREQ_40M
---help---
SPI FLASH frequency
config ESP32S2_FLASH_FREQ_80M
bool "80 MHz"
@ -256,6 +256,126 @@ config ESP32S2_RNG
---help---
ESP32-S2 supports a RNG that passed on Dieharder test suite.
config ESP32S2_I2S
bool "I2S"
default n
select I2S
select ARCH_DMA
select ESP32S2_GPIO_IRQ
---help---
See the Board Selection menu to configure the pins used by I2S.
if ESP32S2_I2S
config ESP32S2_I2S_RX
bool "Enable I2S receiver"
default y
---help---
Enable I2S receive logic
config ESP32S2_I2S_TX
bool "Enable I2S transmitter"
default y
---help---
Enable I2S transmit logic
choice
prompt "I2S role"
default ESP32S2_I2S_ROLE_MASTER
---help---
Selects the operation role of the I2S.
config ESP32S2_I2S_ROLE_MASTER
bool "Master"
config ESP32S2_I2S_ROLE_SLAVE
bool "Slave"
endchoice
choice
prompt "Bit width"
---help---
Selects the valid data bits per sample.
Note that this option may be overwritten by the audio
according to the bit width of the file being played
config ESP32S2_I2S_DATA_BIT_WIDTH_8BIT
bool "8 bits"
config ESP32S2_I2S_DATA_BIT_WIDTH_16BIT
bool "16 bits"
config ESP32S2_I2S_DATA_BIT_WIDTH_24BIT
bool "24 bits"
config ESP32S2_I2S_DATA_BIT_WIDTH_32BIT
bool "32 bits"
endchoice
config ESP32S2_I2S_DATA_BIT_WIDTH
int
default 8 if ESP32S2_I2S_DATA_BIT_WIDTH_8BIT
default 16 if ESP32S2_I2S_DATA_BIT_WIDTH_16BIT
default 24 if ESP32S2_I2S_DATA_BIT_WIDTH_24BIT
default 32 if ESP32S2_I2S_DATA_BIT_WIDTH_32BIT
config ESP32S2_I2S_SAMPLE_RATE
int "I2S sample rate"
default 44100
range 8000 48000
---help---
Selects the sample rate.
Note that this option may be overwritten by the audio
according to the bit width of the file being played
config ESP32S2_I2S_BCLKPIN
int "I2S BCLK pin"
default 35
range 0 45 if ESP32S2_I2S_ROLE_MASTER
range 0 46 if ESP32S2_I2S_ROLE_SLAVE
config ESP32S2_I2S_WSPIN
int "I2S WS pin"
default 34
range 0 45 if ESP32S2_I2S_ROLE_MASTER
range 0 46 if ESP32S2_I2S_ROLE_SLAVE
config ESP32S2_I2S_DINPIN
int "I2S DOUT pin"
depends on ESP32S2_I2S_RX
default 37
range 0 46
config ESP32S2_I2S_DOUTPIN
int "I2S DOUT pin"
depends on ESP32S2_I2S_TX
default 36
range 0 45
config ESP32S2_I2S_MCLK
bool "Enable I2S Master Clock"
depends on ESP32S2_I2S_ROLE_MASTER
default n
---help---
Enable I2S master clock
config ESP32S2_I2S_MCLKPIN
int "I2S MCLK pin"
depends on ESP32S2_I2S_MCLK
default 33
range 0 45
config I2S_DMADESC_NUM
int "I2S DMA maximum number of descriptors"
default 2
---help---
Configure the maximum number of out-link/in-link descriptors to
be chained for a I2S DMA transfer.
endif #ESP32S2_I2S
config ESP32S2_SPI2
bool "SPI 2"
default n

5
arch/xtensa/src/esp32s2/Make.defs
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@ -30,6 +30,7 @@ HEAD_CSRC = esp32s2_start.c esp32s2_wdt.c
CHIP_CSRCS = esp32s2_allocateheap.c esp32s2_clockconfig.c esp32s2_irq.c
CHIP_CSRCS += esp32s2_gpio.c esp32s2_region.c esp32s2_user.c
CHIP_CSRCS += esp32s2_timerisr.c esp32s2_lowputc.c esp32s2_systemreset.c
CHIP_CSRCS += esp32s2_dma.c
# Configuration-dependent ESP32-S2 files
@ -49,6 +50,10 @@ ifeq ($(CONFIG_ESP32S2_I2C),y)
CHIP_CSRCS += esp32s2_i2c.c
endif
ifeq ($(CONFIG_ESP32S2_I2S),y)
CHIP_CSRCS += esp32s2_i2s.c
endif
ifeq ($(CONFIG_ESP32S2_SPI),y)
CHIP_CSRCS += esp32s2_spi.c
endif

186
arch/xtensa/src/esp32s2/esp32s2_dma.c Normal file
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@ -0,0 +1,186 @@
/****************************************************************************
* arch/xtensa/src/esp32s2/esp32s2_dma.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <assert.h>
#include <sys/types.h>
#include "hardware/esp32s2_dma.h"
#include "esp32s2_dma.h"
/****************************************************************************
* Preprocessor Definitions
****************************************************************************/
#ifndef MIN
# define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif
#ifndef ALIGN_UP
# define ALIGN_UP(num, align) (((num) + ((align) - 1)) & ~((align) - 1))
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: esp32s2_dma_init
*
* Description:
* Initialize DMA outlink descriptors and bind the target buffer to
* these DMA descriptors.
*
* Input Parameters:
* dmadesc - Pointer to the DMA descriptors
* num - Number of DMA descriptors
* pbuf - RX/TX buffer pointer
* len - RX/TX buffer length
*
* Returned Value:
* Bound pbuf data bytes
*
****************************************************************************/
uint32_t esp32s2_dma_init(struct esp32s2_dmadesc_s *dmadesc, uint32_t num,
uint8_t *pbuf, uint32_t len)
{
int i;
uint32_t bytes = len;
uint8_t *pdata = pbuf;
uint32_t data_len;
uint32_t buf_len;
DEBUGASSERT(dmadesc != NULL);
DEBUGASSERT(pbuf != NULL);
DEBUGASSERT(len > 0);
for (i = 0; i < num; i++)
{
data_len = MIN(bytes, ESP32S2_DMA_DATALEN_MAX);
/* Buffer length must be rounded to next 32-bit boundary. */
buf_len = ALIGN_UP(data_len, sizeof(uintptr_t));
dmadesc[i].ctrl = (data_len << DMA_CTRL_DATALEN_S) |
(buf_len << DMA_CTRL_BUFLEN_S) |
DMA_CTRL_OWN;
dmadesc[i].pbuf = pdata;
dmadesc[i].next = &dmadesc[i + 1];
bytes -= data_len;
if (bytes == 0)
{
break;
}
pdata += data_len;
}
dmadesc[i].ctrl |= DMA_CTRL_EOF;
dmadesc[i].next = NULL;
return len - bytes;
}
/****************************************************************************
* Name: esp32s2_dma_init_with_padding
*
* Description:
* Initialize DMA outlink descriptors and bind the target buffer to
* these DMA descriptors. If len is not word-aligned, add a new descriptor
* containing a 4-byte variable to make the outlink data world-aligned.
*
* Input Parameters:
* dmadesc - Pointer to the DMA descriptors
* num - Number of DMA descriptors
* pbuf - RX/TX buffer pointer
* len - RX/TX buffer length
* stuff - Value to be padded with the buffer
*
* Returned Value:
* Bound pbuf data bytes
*
****************************************************************************/
uint32_t esp32s2_dma_init_with_padding(struct esp32s2_dmadesc_s *dmadesc,
uint32_t num,
uint8_t *pbuf,
uint32_t len,
uint32_t *stuff)
{
int i;
uint32_t bytes = len;
uint8_t *pdata = pbuf;
uint32_t data_len = 0;
uint32_t buf_len = 0;
DEBUGASSERT(dmadesc != NULL);
DEBUGASSERT(pbuf != NULL);
DEBUGASSERT(len > 0);
for (i = 0; i < num - 1; i++)
{
data_len = MIN(bytes, ESP32S2_DMA_DATALEN_MAX);
/* Buffer length must be rounded to next 32-bit boundary. */
buf_len = ALIGN_UP(data_len, sizeof(uintptr_t));
dmadesc[i].ctrl = (data_len << DMA_CTRL_DATALEN_S) |
(buf_len << DMA_CTRL_BUFLEN_S) |
DMA_CTRL_OWN;
dmadesc[i].pbuf = pdata;
dmadesc[i].next = &dmadesc[i + 1];
bytes -= data_len;
if (bytes == 0)
{
break;
}
pdata += data_len;
}
/* Check if the data_len of the last descriptor is different from buf_len.
* If so, it's necessary to add the padding bytes to a new descriptor on
* outlink.
*/
if (data_len != buf_len)
{
i++;
dmadesc[i].ctrl = ((buf_len - data_len) << DMA_CTRL_DATALEN_S) |
(4 << DMA_CTRL_BUFLEN_S) |
DMA_CTRL_OWN;
dmadesc[i].pbuf = (uint8_t *)stuff;
}
dmadesc[i].ctrl |= DMA_CTRL_EOF;
dmadesc[i].next = NULL;
return len - bytes;
}

124
arch/xtensa/src/esp32s2/esp32s2_dma.h Normal file
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@ -0,0 +1,124 @@
/****************************************************************************
* arch/xtensa/src/esp32s2/esp32s2_dma.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#ifndef __ARCH_XTENSA_SRC_ESP32S2_ESP32S2_DMA_H
#define __ARCH_XTENSA_SRC_ESP32S2_ESP32S2_DMA_H
#include <nuttx/config.h>
#include <stdint.h>
#ifndef __ASSEMBLY__
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Pre-processor Macros
****************************************************************************/
/* DMA max data length */
#define ESP32S2_DMA_DATALEN_MAX (0x1000 - 4)
/* DMA max buffer length */
#define ESP32S2_DMA_BUFLEN_MAX ESP32S2_DMA_DATALEN_MAX
/****************************************************************************
* Public Types
****************************************************************************/
/* DMA descriptor type */
struct esp32s2_dmadesc_s
{
uint32_t ctrl; /* DMA control block */
uint8_t *pbuf; /* DMA TX/RX buffer address */
struct esp32s2_dmadesc_s *next; /* Next DMA descriptor address */
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: esp32s2_dma_init
*
* Description:
* Initialize DMA outlink descriptors and bind the target buffer to
* these DMA descriptors.
*
* Input Parameters:
* dmadesc - Pointer to the DMA descriptors
* num - Number of DMA descriptors
* pbuf - RX/TX buffer pointer
* len - RX/TX buffer length
*
* Returned Value:
* Bound pbuf data bytes
*
****************************************************************************/
uint32_t esp32s2_dma_init(struct esp32s2_dmadesc_s *dmadesc, uint32_t num,
uint8_t *pbuf, uint32_t len);
/****************************************************************************
* Name: esp32s2_dma_init_with_padding
*
* Description:
* Initialize DMA outlink descriptors and bind the target buffer to
* these DMA descriptors. If len is not word-aligned, add a new descriptor
* containing a 4-byte variable to make the outlink data world-aligned.
*
* Input Parameters:
* dmadesc - Pointer to the DMA descriptors
* num - Number of DMA descriptors
* pbuf - RX/TX buffer pointer
* len - RX/TX buffer length
* stuff - Value to be padded with the buffer
*
* Returned Value:
* Bound pbuf data bytes
*
****************************************************************************/
uint32_t esp32s2_dma_init_with_padding(struct esp32s2_dmadesc_s *dmadesc,
uint32_t num,
uint8_t *pbuf,
uint32_t len,
uint32_t *stuff);
#ifdef __cplusplus
}
#endif
#undef EXTERN
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_XTENSA_SRC_ESP32S2_ESP32S2_DMA_H */

1507
arch/xtensa/src/esp32s2/esp32s2_i2s.c Normal file
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File diff suppressed because it is too large Load Diff

74
arch/xtensa/src/esp32s2/esp32s2_i2s.h Normal file
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@ -0,0 +1,74 @@
/****************************************************************************
* arch/xtensa/src/esp32s2/esp32s2_i2s.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __ARCH_XTENSA_SRC_ESP32S2_ESP32S2_I2S_H
#define __ARCH_XTENSA_SRC_ESP32S2_ESP32S2_I2S_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/audio/i2s.h>
#ifndef __ASSEMBLY__
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
#ifdef CONFIG_ESP32S2_I2S
#define ESP32S2_I2S0 0
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: esp32s2_i2sbus_initialize
*
* Description:
* Initialize the selected I2S port
*
* Input Parameters:
* None
*
* Returned Value:
* Valid I2S device structure reference on success; a NULL on failure
*
****************************************************************************/
struct i2s_dev_s *esp32s2_i2sbus_initialize(void);
#endif /* CONFIG_ESP32S2_I2S */
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_XTENSA_SRC_ESP32S2_ESP32S2_I2S_H */

36
arch/xtensa/src/esp32s2/hardware/esp32s2_dma.h Normal file
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@ -0,0 +1,36 @@
/****************************************************************************
* arch/xtensa/src/esp32s2/hardware/esp32s2_dma.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __ARCH_XTENSA_SRC_ESP32S2_HARDWARE_ESP32S2_DMA_H
#define __ARCH_XTENSA_SRC_ESP32S2_HARDWARE_ESP32S2_DMA_H
/* DMA descriptor */
#define DMA_CTRL_OWN (1 << 31) /* Owned by DMA */
#define DMA_CTRL_EOF (1 << 30) /* End of frame */
#define DMA_CTRL_SOSF (1 << 29) /* Start of sub-frame */
#define DMA_CTRL_OFFSET_S (24) /* buffer offset shift */
#define DMA_CTRL_OFFSET_V (0x1f) /* buffer offset value */
#define DMA_CTRL_DATALEN_S (12) /* received/sent data length shift */
#define DMA_CTRL_DATALEN_V (0xfff) /* received/sent data length value */
#define DMA_CTRL_BUFLEN_S (0) /* received/sent buffer length shift */
#define DMA_CTRL_BUFLEN_V (0xfff) /* received/sent buffer length value */
#endif /* __ARCH_XTENSA_SRC_ESP32S2_HARDWARE_ESP32S2_DMA_H */

460
arch/xtensa/src/esp32s2/hardware/esp32s2_i2s.h
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File diff suppressed because it is too large Load Diff

4
boards/xtensa/esp32s2/common/src/Make.defs
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@ -28,6 +28,10 @@ ifeq ($(CONFIG_SENSORS_MAX6675),y)
CSRCS += esp32s2_max6675.c
endif
ifeq ($(CONFIG_ESP32S2_I2S),y)
CSRCS += esp32s2_board_i2sdev.c
endif
DEPPATH += --dep-path src
VPATH += :src
CFLAGS += $(shell $(INCDIR) "$(CC)" $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)src)

113
boards/xtensa/esp32s2/common/src/esp32s2_board_i2sdev.c Normal file
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@ -0,0 +1,113 @@
/****************************************************************************
* boards/xtensa/esp32s2/common/src/esp32s2_board_i2sdev.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <debug.h>
#include <errno.h>
#include <nuttx/audio/audio.h>
#include <nuttx/audio/audio_i2s.h>
#include <nuttx/audio/i2s.h>
#include <nuttx/audio/pcm.h>
#include <arch/board/board.h>
#include "esp32s2_i2s.h"
#if defined(CONFIG_ESP32S2_I2S) && !defined(CONFIG_AUDIO_CS4344)
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_i2sdev_initialize
*
* Description:
* This function is called by platform-specific, setup logic to configure
* and register the generic I2S audio driver. This function will register
* the driver as /dev/audio/pcm[x] where x is determined by the I2S port
* number.
*
* Input Parameters:
* None
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is
* returned to indicate the nature of the failure.
*
****************************************************************************/
int board_i2sdev_initialize(void)
{
struct audio_lowerhalf_s *audio_i2s;
struct audio_lowerhalf_s *pcm;
struct i2s_dev_s *i2s;
char devname[5];
int ret;
ainfo("Initializing I2S\n");
i2s = esp32s2_i2sbus_initialize();
#ifdef CONFIG_AUDIO_I2SCHAR
ret = i2schar_register(i2s, 0);
if (ret < 0)
{
aerr("ERROR: i2schar_register failed: %d\n", ret);
return ret;
}
#endif
audio_i2s = audio_i2s_initialize(i2s, true);
if (!audio_i2s)
{
auderr("ERROR: Failed to initialize the Generic I2S audio driver\n");
return -ENODEV;
}
pcm = pcm_decode_initialize(audio_i2s);
if (!pcm)
{
auderr("ERROR: Failed create the PCM decoder\n");
return -ENODEV;
}
snprintf(devname, 5, "pcm0");
ret = audio_register(devname, pcm);
if (ret < 0)
{
auderr("ERROR: Failed to register /dev/%s device: %d\n", devname, ret);
}
return ret;
}
#endif /* (CONFIG_ESP32S2_I2S) && !defined (CONFIG_AUDIO_CS4344) */

60
boards/xtensa/esp32s2/esp32s2-saola-1/configs/i2schar/defconfig Normal file
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@ -0,0 +1,60 @@
#
# This file is autogenerated: PLEASE DO NOT EDIT IT.
#
# You can use "make menuconfig" to make any modifications to the installed .config file.
# You can then do "make savedefconfig" to generate a new defconfig file that includes your
# modifications.
#
# CONFIG_ARCH_LEDS is not set
# CONFIG_ESP32S2_I2S_RX is not set
# CONFIG_NDEBUG is not set
# CONFIG_NSH_ARGCAT is not set
# CONFIG_NSH_CMDOPT_HEXDUMP is not set
# CONFIG_NSH_CMDPARMS is not set
CONFIG_ARCH="xtensa"
CONFIG_ARCH_BOARD="esp32s2-saola-1"
CONFIG_ARCH_BOARD_COMMON=y
CONFIG_ARCH_BOARD_ESP32S2_SAOLA_1=y
CONFIG_ARCH_CHIP="esp32s2"
CONFIG_ARCH_CHIP_ESP32S2=y
CONFIG_ARCH_CHIP_ESP32S2WROVER=y
CONFIG_ARCH_STACKDUMP=y
CONFIG_ARCH_XTENSA=y
CONFIG_AUDIO=y
CONFIG_AUDIO_I2S=y
CONFIG_AUDIO_I2SCHAR=y
CONFIG_BOARD_LOOPSPERMSEC=16717
CONFIG_BUILTIN=y
CONFIG_DEBUG_FULLOPT=y
CONFIG_DEBUG_SYMBOLS=y
CONFIG_DRIVERS_AUDIO=y
CONFIG_ESP32S2_I2S=y
CONFIG_ESP32S2_I2S_MCLK=y
CONFIG_ESP32S2_UART0=y
CONFIG_EXAMPLES_I2SCHAR=y
CONFIG_EXAMPLES_I2SCHAR_TX=y
CONFIG_EXAMPLES_I2SCHAR_TXSTACKSIZE=4096
CONFIG_FS_PROCFS=y
CONFIG_HAVE_CXX=y
CONFIG_HAVE_CXXINITIALIZE=y
CONFIG_IDLETHREAD_STACKSIZE=3072
CONFIG_INIT_ENTRYPOINT="nsh_main"
CONFIG_INIT_STACKSIZE=4096
CONFIG_INTELHEX_BINARY=y
CONFIG_NSH_ARCHINIT=y
CONFIG_NSH_BUILTIN_APPS=y
CONFIG_NSH_FILEIOSIZE=512
CONFIG_NSH_LINELEN=64
CONFIG_NSH_READLINE=y
CONFIG_PREALLOC_TIMERS=4
CONFIG_RAM_SIZE=114688
CONFIG_RAM_START=0x20000000
CONFIG_RR_INTERVAL=200
CONFIG_SCHED_HPWORK=y
CONFIG_SCHED_LPWORK=y
CONFIG_SCHED_WAITPID=y
CONFIG_START_DAY=6
CONFIG_START_MONTH=12
CONFIG_START_YEAR=2011
CONFIG_SYSTEM_NSH=y
CONFIG_UART0_SERIAL_CONSOLE=y

22
boards/xtensa/esp32s2/esp32s2-saola-1/src/esp32s2-saola-1.h
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@ -152,5 +152,27 @@ int board_i2c_init(void);
int board_bmp180_initialize(int devno, int busno);
#endif
/****************************************************************************
* Name: board_i2sdev_initialize
*
* Description:
* This function is called by platform-specific, setup logic to configure
* and register the generic I2S audio driver. This function will register
* the driver as /dev/audio/pcm[x] where x is determined by the I2S port
* number.
*
* Input Parameters:
* None.
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is
* returned to indicate the nature of the failure.
*
****************************************************************************/
#ifdef CONFIG_ESP32S2_I2S
int board_i2sdev_initialize(void);
#endif
#endif /* __ASSEMBLY__ */
#endif /* __BOARDS_XTENSA_ESP32S2_ESP32S2_SAOLA_1_SRC_ESP32S2_SAOLA_1_H */

12
boards/xtensa/esp32s2/esp32s2-saola-1/src/esp32s2_bringup.c
View File

@ -229,6 +229,18 @@ int esp32s2_bringup(void)
}
#endif
#ifdef CONFIG_ESP32S2_I2S
/* Configure I2S generic audio on I2S0 */
ret = board_i2sdev_initialize();
if (ret < 0)
{
syslog(LOG_ERR, "Failed to initialize I2S0 driver: %d\n", ret);
}
#endif /* CONFIG_ESP32S2_I2S */
/* If we got here then perhaps not all initialization was successful, but
* at least enough succeeded to bring-up NSH with perhaps reduced
* capabilities.