【LPC55S69】rt-thread gpio命令行测试代码添加

oxlm · 发表于 2023-2-7 23:27:48

背景

本身想做的事把RTT现有驱动一个一个的测试一轮，顺便把缺少的驱动一个一个的添加上去。由于自己的工作习惯是通过敲命令的方式来测试各个模块，而且RTT也支持msh命令行，因此便决定采用敲命令的方式进行驱动测试。
查询LPC55sxx代码，发现应用层的驱动测试接口并未添加，因此手动添加测试接口。

项目配置

修改配置文件“bsp\lpc55sxx\lpc55s69_nxp_evk\applications\SConscript”

import rtconfig
from building import *
cwd = GetCurrentDir()
#src = Glob('main.c')
src = Glob('*.c')
CPPPATH = [cwd]
# add for startup script
if rtconfig.PLATFORM in ['gcc']:
CPPDEFINES = ['__START=entry']
else:
CPPDEFINES = []
group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH, CPPDEFINES=CPPDEFINES)
Return('group')

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代码添加
- 在“bsp\lpc55sxx\lpc55s69_nxp_evk\applications”目录下添加文件“gpio_test.c”，并添加以下内容：

/*
* Copyright (c) 2006-2023, RT-Thread Development Team
* Copyright (c) 2019-2020, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-02-07 Liuxiequan First Version
*
*/
#include <rtdevice.h>
#include "drv_pin.h"
int gpio_mode(int argc, char **argv)
{
int err = -RT_ERROR;
int port, pin, level;
if (argc == 4)
{
port = atoi(argv[1]);
pin = atoi(argv[2]);
if ((port != -1) && (pin != -1))
{
if (strcmp("in", argv[3]) == 0)
{
rt_pin_mode(GET_PINS(port, pin), PIN_MODE_INPUT);
rt_kprintf("PIO%d_%d input\n", port, pin);
err = RT_EOK;
}
else if (strcmp("in_pu", argv[3]) == 0)
{
rt_pin_mode(GET_PINS(port, pin), PIN_MODE_INPUT_PULLUP);
rt_kprintf("PIO%d_%d input pull up\n", port, pin);
err = RT_EOK;
}
else if (strcmp("in_pd", argv[3]) == 0)
{
rt_pin_mode(GET_PINS(port, pin), PIN_MODE_INPUT_PULLDOWN);
rt_kprintf("PIO%d_%d input pull down\n", port, pin);
err = RT_EOK;
}
else if (strcmp("out", argv[3]) == 0)
{
rt_pin_mode(GET_PINS(port, pin), PIN_MODE_OUTPUT);
rt_kprintf("PIO%d_%d output\n", port, pin);
err = RT_EOK;
}
else if (strcmp("out_od", argv[3]) == 0)
{
rt_pin_mode(GET_PINS(port, pin), PIN_MODE_OUTPUT_OD);
rt_kprintf("PIO%d_%d output od\n", port, pin);
err = RT_EOK;
}
}
}
if (err)
{
rt_kprintf("Param error: Need input gpio_mode port pin [in/in_pu/in_pd/out/out_od]\n");
}
}
MSH_CMD_EXPORT(gpio_mode, gpio_mode)
int gpio_read(int argc, char **argv)
{
int err = -RT_ERROR;
int port, pin, level;
if (argc == 3)
{
port = atoi(argv[1]);
pin = atoi(argv[2]);
if ((port != -1) && (pin != -1))
{
rt_kprintf("PIO%d_%d: %d\n", port, pin, rt_pin_read(GET_PINS(port, pin)));
err = RT_EOK;
}
}
if (err)
{
rt_kprintf("Param error: Need input gpio_read port pin\n");
}
}
MSH_CMD_EXPORT(gpio_read, gpio_read)
int gpio_write(int argc, char **argv)
{
int err = -RT_ERROR;
int port, pin, level;
if (argc == 4)
{
port = atoi(argv[1]);
pin = atoi(argv[2]);
level = atoi(argv[3]);
if ((port != -1) && (pin != -1) && ((level == 0) || (level == 1)))
{
rt_pin_write(GET_PINS(port, pin), level);
rt_kprintf("PIO%d_%d level : %d\n", port, pin, level);
err = RT_EOK;
}
}
if (err)
{
rt_kprintf("Param error: Need input gpio_write port pin level\n");
}
}
MSH_CMD_EXPORT(gpio_write, gpio_write)

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在“bsp\lpc55sxx\lpc55s69_nxp_evk\”目录下启动env，并运行命令“scons --target=mdk5”,生成新工程

> scons --target=mdk5
scons: Reading SConscript files ...
scons: warning: No version of Visual Studio compiler found - C/C++ compilers most likely not set correctly
File "E:\Project\RT-Thread\github\rt-thread\bsp\lpc55sxx\lpc55s69_nxp_evk\SConstruct", line 45, in <module>
Keil5 project is generating...
Keil Version: 0.0
Keil-MDK project has generated successfully!

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打开工程，编译代码并下载

硬件配置

通过查看开发板原理图，发现PIO0_0属于悬空状态，适合用作接口测试，因此暂时使用该口做接口测试（论坛一贴图就说超，删掉图片，具体自行查看原理图）

测试效果

\ | /
- RT - Thread Operating System
/ | \ 5.0.0 build Feb 7 2023 20:41:22
2006 - 2022 Copyright by RT-Thread team
[I/I2C] I2C bus [i2c4] registered
using armclang, version: 6180002
msh />sd mount to / failed
msh />
msh />
msh />
msh />gpio_mo
gpio_mode
msh />gpio_mode 0 0 in
msh />gpio_mode 0 0 in
PIO0_0 input
msh />gpio_r
gpio_read
msh />gpio_read 0 0
PIO0_0: 1
msh />gpio_mode 0 0 in_pd
msh />gpio_mode 0 0 in_pd
PIO0_0 input pull down
msh />
msh />
msh />gpio_re
gpio_read
msh />gpio_read 0 0
PIO0_0: 0
msh />gpio_re
gpio_read
msh />gpio_mode 0 0 in_pu
PIO0_0 input pull up
msh />
msh />
msh />gpio_read 0 0
PIO0_0: 1
msh />gpio_mode 0 0 out
PIO0_0 output
msh />gpio_r
gpio_read
msh />gpio_read 0
Param error: Need input gpio_read port pin
msh />gpio_r
gpio_read
msh />gpio_read 0 0
PIO0_0: 1
msh />gpio_out 0 0 0
gpio_out: command not found.
msh />gpio_wri
gpio_write
msh />gpio_write 0 0 0
PIO0_0 level : 0
msh />gpio_re
gpio_read
msh />gpio_read 0
Param error: Need input gpio_read port pin
msh />gpio_re
gpio_read
msh />gpio_read 0 0
PIO0_0: 0
msh />gpio_mode 0 0 out_od
PIO0_0 output od
msh />gpio_re
gpio_read
msh />gpio_read 0 0
PIO0_0: 1
msh />gpio_w
gpio_write
msh />gpio_write 0 0 0
PIO0_0 level : 0
msh />gpio_read 0 0
PIO0_0: 0
msh />

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结论

通过测试PIO0_0，发现该gpio驱动层实现逻辑正常。由于板载其他IO口大部分存在上下拉情况，在测试时读取的值会与悬空态读取的值有差异，发现差异时通过查找原理图，发现与实际效果一致。
另外，测试发现NXP芯片一个很好的地方，在IO口设置为输出态时，使用gpio_read读回的IO口状态正确，查驱动层和fsl层代码，并未发现特殊处理，怀疑是芯片硬件层面实现了该方面的兼容。