sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

esp32/rmt: Use the Espressif`s common RMT driver.

Browse Source 
This commit implements the common RMT driver (already available for
the other Espressif's xtensa-based devices) for ESP32.
This allows us to have a proper separation between the lower and
upper-half drivers and use the 'ws2812' example to drive WS2812 RGB
LEDs.
This commit is contained in:
Tiago Medicci Serrano 2023-12-15 10:12:32 -03:00 committed by Alan Carvalho de Assis
parent 6b73782c27
commit 5ba40d083a
9 changed files with 362 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/xtensa/src/esp32/Kconfig
View File

@ -213,6 +213,8 @@ config ESP32_EXCEPTION_ENABLE_CACHE
menu "ESP32 Peripheral Selection"
source "arch/xtensa/src/common/espressif/Kconfig"
config ESP32_UART
bool
default n

2
arch/xtensa/src/esp32/esp32_gpio.c
View File

@ -35,6 +35,8 @@
#include "xtensa.h"
#include "soc/soc_caps.h"
#include "hardware/esp32_iomux.h"
#include "hardware/esp32_gpio.h"

18
arch/xtensa/src/esp32/esp32_gpio.h
View File

@ -102,6 +102,24 @@
#define ONLOW_WE 0x0c
#define ONHIGH_WE 0x0d
/* Check whether it is a valid GPIO number */
#define GPIO_IS_VALID_GPIO(gpio_num) ((gpio_num >= 0) && \
(((1ULL << (gpio_num)) & \
SOC_GPIO_VALID_GPIO_MASK) != 0))
/* Check whether it can be a valid GPIO number of output mode */
#define GPIO_IS_VALID_OUTPUT_GPIO(gpio_num) \
((gpio_num >= 0) && \
(((1ULL << (gpio_num)) & SOC_GPIO_VALID_OUTPUT_GPIO_MASK) != 0))
/* Check whether it can be a valid digital I/O pad */
#define GPIO_IS_VALID_DIGITAL_IO_PAD(gpio_num) \
((gpio_num >= 0) && \
(((1ULL << (gpio_num)) & SOC_GPIO_VALID_DIGITAL_IO_PAD_MASK) != 0))
/****************************************************************************
* Public Types
****************************************************************************/

97
boards/xtensa/esp32/common/include/esp32_board_rmt.h Normal file
View File

@ -0,0 +1,97 @@
/****************************************************************************
* boards/xtensa/esp32/common/include/esp32_board_rmt.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 __BOARDS_XTENSA_ESP32_COMMON_INCLUDE_ESP32_BOARD_RMT_H
#define __BOARDS_XTENSA_ESP32_COMMON_INCLUDE_ESP32_BOARD_RMT_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef __ASSEMBLY__
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifdef CONFIG_ESP_RMT
/****************************************************************************
* Name: board_rmt_rxinitialize
*
* Description:
* Initialize the RMT peripheral and register a RX device.
*
* Input Parameters:
* ch - the RMT's channel that will be used
* pin - The pin used for the RX channel
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int board_rmt_rxinitialize(int ch, int pin);
/****************************************************************************
* Name: board_rmt_txinitialize
*
* Description:
* Initialize the RMT peripheral and register a TX device.
*
* Input Parameters:
* ch - the RMT's channel that will be used
* pin - The pin used for the TX channel
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int board_rmt_txinitialize(int ch, int pin);
#endif /* CONFIG_ESP_RMT */
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __BOARDS_XTENSA_ESP32_COMMON_INCLUDE_ESP32_BOARD_RMT_H */

4
boards/xtensa/esp32/common/src/Make.defs
View File

@ -140,8 +140,8 @@ ifeq ($(CONFIG_RGBLED),y)
CSRCS += esp32_rgbled.c
endif
ifeq ($(CONFIG_ESP32_RMT),y)
CSRCS += esp32_rmt.c
ifeq ($(CONFIG_ESP_RMT),y)
CSRCS += esp32_board_rmt.c
endif
#ifeq ($(CONFIG_DAC),y)

155
boards/xtensa/esp32/common/src/esp32_board_rmt.c Normal file
View File

@ -0,0 +1,155 @@
/****************************************************************************
* boards/xtensa/esp32/common/src/esp32_board_rmt.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 <errno.h>
#include <debug.h>
#include <stdio.h>
#include "xtensa.h"
#include <nuttx/kmalloc.h>
#include <nuttx/rmt/rmtchar.h>
#ifdef CONFIG_WS2812_NON_SPI_DRIVER
#include <nuttx/leds/ws2812.h>
#include "espressif/esp_ws2812.h"
#endif
#include "espressif/esp_rmt.h"
#ifdef CONFIG_ESP_RMT
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_rmt_rxinitialize
*
* Description:
* Initialize the RMT peripheral and register a RX device.
*
* Input Parameters:
* ch - the RMT's channel that will be used
* pin - The pin used for the RX channel
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int board_rmt_rxinitialize(int ch, int pin)
{
int ret;
struct rmt_dev_s *rmt = esp_rmt_rx_init(ch, pin);
ret = rmtchar_register(rmt);
if (ret < 0)
{
rmterr("ERROR: rmtchar_register failed: %d\n", ret);
return ret;
}
return ret;
}
/****************************************************************************
* Name: board_rmt_txinitialize
*
* Description:
* Initialize the RMT peripheral and register a TX device.
*
* Input Parameters:
* ch - the RMT's channel that will be used
* pin - The pin used for the TX channel
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int board_rmt_txinitialize(int ch, int pin)
{
int ret;
struct rmt_dev_s *rmt;
#ifdef CONFIG_WS2812_NON_SPI_DRIVER
struct ws2812_dev_s *led;
#endif
rmt = esp_rmt_tx_init(ch, pin);
if (rmt == NULL)
{
rmterr("ERROR: esp_rmt_tx_init failed\n");
return -ENODEV;
}
ret = rmtchar_register(rmt);
if (ret < 0)
{
rmterr("ERROR: rmtchar_register failed: %d\n", ret);
return ret;
}
#ifdef CONFIG_WS2812_NON_SPI_DRIVER
led = esp_ws2812_setup("/dev/leds0", rmt,
CONFIG_WS2812_LED_COUNT, false);
if (led == NULL)
{
rmterr("ERROR: esp_ws2812_setup failed\n");
return -ENODEV;
}
#endif
return ret;
}
#endif

57
boards/xtensa/esp32/esp32-devkitc/configs/rmt/defconfig Normal file
View File

@ -0,0 +1,57 @@
#
# 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_NSH_ARGCAT is not set
# CONFIG_NSH_CMDOPT_HEXDUMP is not set
CONFIG_ARCH="xtensa"
CONFIG_ARCH_BOARD="esp32-devkitc"
CONFIG_ARCH_BOARD_COMMON=y
CONFIG_ARCH_BOARD_ESP32_DEVKITC=y
CONFIG_ARCH_CHIP="esp32"
CONFIG_ARCH_CHIP_ESP32=y
CONFIG_ARCH_CHIP_ESP32WROVER=y
CONFIG_ARCH_STACKDUMP=y
CONFIG_ARCH_XTENSA=y
CONFIG_BOARD_LOOPSPERMSEC=16717
CONFIG_BUILTIN=y
CONFIG_ESP32_UART0=y
CONFIG_ESP_RMT=y
CONFIG_EXAMPLES_RMTCHAR=y
CONFIG_EXAMPLES_RMTCHAR_RX=y
CONFIG_EXAMPLES_RMTCHAR_TX=y
CONFIG_EXAMPLES_WS2812=y
CONFIG_FS_PROCFS=y
CONFIG_HAVE_CXX=y
CONFIG_HAVE_CXXINITIALIZE=y
CONFIG_IDLETHREAD_STACKSIZE=3072
CONFIG_INIT_ENTRYPOINT="nsh_main"
CONFIG_INIT_STACKSIZE=3072
CONFIG_INTELHEX_BINARY=y
CONFIG_MM_REGIONS=3
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_RMT=y
CONFIG_RMTCHAR=y
CONFIG_RMT_DEFAULT_RX_BUFFER_SIZE=256
CONFIG_RR_INTERVAL=200
CONFIG_SCHED_WAITPID=y
CONFIG_START_DAY=6
CONFIG_START_MONTH=12
CONFIG_START_YEAR=2011
CONFIG_SYSLOG_BUFFER=y
CONFIG_SYSTEM_NSH=y
CONFIG_UART0_SERIAL_CONSOLE=y
CONFIG_WS2812=y
CONFIG_WS2812_LED_COUNT=100
CONFIG_WS2812_NON_SPI_DRIVER=y

12
boards/xtensa/esp32/esp32-devkitc/src/esp32-devkitc.h
View File

@ -68,8 +68,16 @@
/* RMT gpio */
#define RMT_OUTPUT_PIN 4
#define RMT_CHANNEL 0
#define RMT_RXCHANNEL 1
#define RMT_TXCHANNEL 0
#ifdef CONFIG_RMT_LOOP_TEST_MODE
# define RMT_INPUT_PIN 0
# define RMT_OUTPUT_PIN 0
#else
# define RMT_INPUT_PIN 2
# define RMT_OUTPUT_PIN 4
#endif
/****************************************************************************
* Public Types

20
boards/xtensa/esp32/esp32-devkitc/src/esp32_bringup.c
View File

@ -165,6 +165,10 @@
# include "esp32_board_dac.h"
#endif
#ifdef CONFIG_ESP_RMT
# include "esp32_board_rmt.h"
#endif
#include "esp32-devkitc.h"
/****************************************************************************
@ -653,6 +657,20 @@ int esp32_bringup(void)
}
#endif
#ifdef CONFIG_ESP_RMT
ret = board_rmt_txinitialize(RMT_TXCHANNEL, RMT_OUTPUT_PIN);
if (ret < 0)
{
syslog(LOG_ERR, "ERROR: board_rmt_txinitialize() failed: %d\n", ret);
}
ret = board_rmt_rxinitialize(RMT_RXCHANNEL, RMT_INPUT_PIN);
if (ret < 0)
{
syslog(LOG_ERR, "ERROR: board_rmt_txinitialize() failed: %d\n", ret);
}
#endif
#ifdef CONFIG_RTC_DRIVER
/* Instantiate the ESP32 RTC driver */
@ -676,7 +694,7 @@ int esp32_bringup(void)
#endif
#ifdef CONFIG_WS2812
# ifndef CONFIG_WS2812_NON_SPI_DRIVER
# ifndef CONFIG_WS2812_NON_SPI_DRIVER
ret = board_ws2812_initialize(0, ESP32_SPI3, CONFIG_WS2812_LED_COUNT);
if (ret < 0)
{