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drivers/serial: add ram uart driver
It uses the memory block as the serial communication medium, which can communicate between different processes or different CPUs Using the following configuration, the cross-core communication rate of 200MHz cortex-M55 is about 461KB/s RAM_UART_BUFSIZE=1024 RAM_UART_POLLING_INTERVAL=100 Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
This commit is contained in:
yinshengkai
Xiang Xiao
@@ -41,6 +41,7 @@
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#include <nuttx/segger/rtt.h>
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#include <nuttx/sensors/sensor.h>
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#include <nuttx/serial/pty.h>
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#include <nuttx/serial/uart_ram.h>
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#include <nuttx/syslog/syslog.h>
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#include <nuttx/syslog/syslog_console.h>
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#include <nuttx/trace.h>
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@@ -118,6 +119,10 @@ void drivers_initialize(void)
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rpmsg_serialinit();
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#endif
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#ifdef CONFIG_RAM_UART
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ram_serialinit();
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#endif
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/* Initialize the console device driver (if it is other than the standard
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* serial driver).
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*/
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@@ -679,6 +679,75 @@ source "drivers/serial/Kconfig-lpuart"
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source "drivers/serial/Kconfig-usart"
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source "drivers/serial/Kconfig-sci"
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config RAM_UART
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bool "RAM uart driver"
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select SERIAL_RXDMA
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select SERIAL_TXDMA
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default n
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---help---
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It uses the memory block in the kernel as a communication medium,
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which can communicate between different processes or different CPUs
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if RAM_UART
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config RAM_UART_POLLING_INTERVAL
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int "RAM uart buffer check interval"
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default USEC_PER_TICK
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---help---
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Interval in milliseconds to check for new data on uart ram buffer
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config RAM_UART_BUFSIZE
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int "RAM_UART buffer size"
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default 1024
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---help---
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The size of the RAM_UART buffer in bytes
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config RAM_UART0
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bool "RAM uart driver 0"
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default n
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---help---
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RAM_UART device 0
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config RAM_UART0_SLAVE
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bool "RAM_UART0 is slave"
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depends on RAM_UART0
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default n
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---help---
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The RAM uart0 is slave
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config RAM_UART1
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bool "RAM uart driver 1"
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default n
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---help---
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RAM uart device 1
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config RAM_UART1_SLAVE
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bool "RAM uart1 is slave"
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depends on RAM_UART1
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default n
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---help---
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The RAM uart1 is slave
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config RAM_UART2
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bool "RAM uart driver 2"
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default n
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---help---
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RAM uart device 2
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config RAM_UART2_SLAVE
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bool "RAM uart2 is slave"
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depends on RAM_UART2
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default n
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---help---
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The RAM uart2 is slave
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config RAM_UART_BUFFER_SECTION
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string "RAM uart buffer section name"
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depends on RAM_UART0 || RAM_UART1 || RAM_UART2
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---help---
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The name of the section in the kernel memory block
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endif # RAM_UART
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menuconfig PSEUDOTERM
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bool "Pseudo-Terminal (PTY) support"
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default n
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@@ -61,6 +61,11 @@ ifeq ($(CONFIG_UART_BTH5),y)
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CSRCS += uart_bth5.c
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endif
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# RAM uart support
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ifeq ($(CONFIG_RAM_UART),y)
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CSRCS += uart_ram.c
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endif
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# Include serial build support
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File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,82 @@
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/****************************************************************************
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* include/nuttx/serial/uart_ram.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_SERIAL_UART_RAM_H
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#define __INCLUDE_NUTTX_SERIAL_UART_RAM_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#ifdef CONFIG_RAM_UART
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#include <stdatomic.h>
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#include <stdbool.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Type Declarations
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****************************************************************************/
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struct uart_rambuf_s
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{
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char buffer[CONFIG_RAM_UART_BUFSIZE];
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atomic_uint wroff;
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atomic_uint rdoff;
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};
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/****************************************************************************
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* Name: uart_ram_register
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****************************************************************************/
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int uart_ram_register(FAR const char *devname,
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FAR struct uart_rambuf_s buffer[2], bool slave);
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/****************************************************************************
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* Name: ram_serialinit
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****************************************************************************/
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void ram_serialinit(void);
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#ifdef __cplusplus
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}
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#endif
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#endif
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#endif
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