stty -F /dev/ttyS3 115200 -echo
cat /dev/ttyS3 &
echo serialdata > /dev/ttyS3
20250319在荣品的PRO-RK3566开发板的buildroot系统下使用集成的QT应用调试串口UART3
2025/3/19 14:17
缘起：在荣品的PRO-RK3566开发板的buildroot系统下，在命令行中使用echo可以发送数据。
但是cat不能接收数据。荣品建议直接使用SDK中集成的QT应用来测试了。
串口线需要使用1.25/1.27mm间距的4PIN排线。
1、现在 在PRO-RK3566开发板上的UART3。可以以 115200bps N 8 1 对外发送，请问 接受怎么配置？
2、打开 UART3时 内核的警告信息？怎么关闭？如何处理？
root@rk3566-buildroot:/dev# stty -F /dev/ttyS3 115200 -echo
[ 36.455271] of_dma_request_slave_channel: dma-names property of node '/serial@fe670000' missing or empty
root@rk3566-buildroot:/dev# [ 36.455328] dw-apb-uart fe670000.serial: failed to request DMA, use interrupt mode
1 桌面也有测试的qt 应用 可以去看接收
2 打印是没有开启dma 模式,对收发没有影响，需要可以去 内核目录下搜索 注释打印
参考资料：
https://doc.rpdzkj.cn/#/zh_cn/%E7%91%9E%E8%8A%AF%E5%BE%AE%E7%B3%BB%E5%88%97/rk3566-rk3568/8.%E6%8E%A5%E5%8F%A3%E4%BD%BF%E7%94%A8?id=%e4%b8%b2%e5%8f%a3%e6%b5%8b%e8%af%95
串口测试
Debian 或者 Ubuntu 可用minicom测试
安装：
sudo apt－get install minicom
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安装完成后，启动 minicom
例如：
以115200的波率、无校验位、1位停止位的方式连接到/dev/ttyS5串口。
sudo minicom -b 115200 -o -D /dev/ttyS5
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退出后短接TX,RX，输入英文或数字字符，就能在界面中显示出来
image-49
buildroot
使用自带命令cat和echo模拟串口收发。
短接串口的tx和rx。
配置串口：
设置波特率为 115200，-F指定具体的串口，其它参数不指定使用默认值。
stty -F /dev/ttyS0 115200 -echo
复制Error已复制
开始测试：
后台cat在串口有数据时打印接收到的数据：
cat /dev/ttyS0 &
复制Error已复制
使用echo将数据重定向到串口/dev/ttyS0：
echo serialdata > /dev/ttyS0
复制Error已复制
如果串口正常，则会在终端打印echo传输的信息。
参考资料：
百度：RK3588 串口测试
https://blog.csdn.net/MATLABCSD/article/details/136390240?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522f1e73abada1bd9b99186c23ec00cd9ac%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=f1e73abada1bd9b99186c23ec00cd9ac&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_ecpm_v1~rank_v31_ecpm-1-136390240-null-null.142^v102^pc_search_result_base6&utm_term=rk3588%20%E6%B5%8B%E8%AF%95%E4%B8%B2%E5%8F%A3%E5%8A%9F%E8%83%BD%E6%98%AF%E5%90%A6%E6%AD%A3%E5%B8%B8&spm=1018.2226.3001.4187
https://blog.csdn.net/MATLABCSD/article/details/136390240
rk3588 测试串口功能是否正常
https://blog.51cto.com/u_16213608/12700040
瑞芯微rk3588 实测目标检测
https://www.bilibili.com/opus/850451336208056345
RK3588平台产测之ArmSoM-W3 DDR压力测试
root@rk3566-buildroot:/#
root@rk3566-buildroot:/# cd rockchip-test/
root@rk3566-buildroot:/rockchip-test# cd ddr/
root@rk3566-buildroot:/rockchip-test/ddr#
root@rk3566-buildroot:/rockchip-test/ddr# ll
total 24
drwxr-xr-x 2 root root 4096 Jul 2 2024 ./
drwxr-xr-x 16 root root 4096 Jul 2 2024 ../
-rwxr-xr-x 1 root root 1116 Jul 1 2024 ddr_freq_scaling.sh*
-rwxr-xr-x 1 root root 1395 Jul 1 2024 ddr_test.sh*
-rwxr-xr-x 1 root root 559 Jul 1 2024 memtester_test.sh*
-rwxr-xr-x 1 root root 681 Jul 1 2024 stressapptest_test.sh*
root@rk3566-buildroot:/rockchip-test/ddr#
https://www.elecfans.com/d/5402027.html
迅为电子RK3588S开发板第三章Buildroot系统功能测试
https://blog.51cto.com/u_14224/12947041
rk3588串口查看DDR gpu CPU频率及利用率
https://baijiahao.baidu.com/s?id=1780150091100272757&wfr=spider&for=pc
https://zhuanlan.zhihu.com/p/664344987
https://blog.csdn.net/sinovoip/article/details/134008668
Banana Pi BPI-W3（Armsom W3）RK3588开当板之调试UART
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <termio.h>
#include <time.h>
#include <pthread.h>
int read_data(int fd, void *buf, int len);
int write_data(int fd, void *buf, int len);
int setup_port(int fd, int baud, int databits, int parity, int stopbits);
void print_usage(char *program_name);
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t data_ready = PTHREAD_COND_INITIALIZER;
int data_available = 0;
void *read_thread(void *arg) {
int fd = *(int *)arg;
char buffer[1024]; // 存储读取的数据
while (1) {
int bytes_read = read_data(fd, buffer, sizeof(buffer));
if (bytes_read > 0) {
printf("Read Thread: Read %d bytes: %s\n", bytes_read, buffer);
} else {
// 处理读取错误或设备关闭的情况
break;
}
}
pthread_exit(NULL);
}
void *write_thread(void *arg) {
int fd = *(int *)arg;
char input[1024]; // 存储用户输入的数据
while (1) {
printf("Enter data to write (or 'q' to quit): ");
fgets(input, sizeof(input), stdin);
if (strcmp(input, "q\n") == 0 || strcmp(input, "Q\n") == 0) {
// 用户输入 'q' 或 'Q'，退出循环
break;
}
int len = strlen(input);
int bytes_written = write_data(fd, input, len);
if (bytes_written > 0) {
printf("Write Thread: Wrote %d bytes: %s\n", bytes_written, input);
}
}
pthread_exit(NULL);
}
int main(int argc, char *argv[]) //./a.out /dev/ttyS4 115200 8 0 1
{
int fd;
int baud;
int len;
int count;
int i;
int databits;
int stopbits;
int parity;
if (argc != 6) {
print_usage(argv[0]);
return 1;
}
baud = atoi(argv[2]);
if ((baud < 0) || (baud > 921600)) {
fprintf(stderr, "Invalid baudrate!\n");
return 1;
}
databits = atoi(argv[3]);
if ((databits < 5) || (databits > 8)) {
fprintf(stderr, "Invalid databits!\n");
return 1;
}
parity = atoi(argv[4]);
if ((parity < 0) || (parity > 2)) {
fprintf(stderr, "Invalid parity!\n");
return 1;
}
stopbits = atoi(argv[5]);
if ((stopbits < 1) || (stopbits > 2)) {
fprintf(stderr, "Invalid stopbits!\n");
return 1;
}
fd = open(argv[1], O_RDWR, 0);
if (fd < 0) {
fprintf(stderr, "open <%s> error %s\n", argv[1], strerror(errno));
return 1;
}
if (setup_port(fd, baud, databits, parity, stopbits)) {
fprintf(stderr, "setup_port error %s\n", strerror(errno));
close(fd);
return 1;
}
pthread_t read_tid, write_tid;
int ret;
// 创建读取线程
ret = pthread_create(&read_tid, NULL, read_thread, &fd);
if (ret != 0) {
fprintf(stderr, "Failed to create read thread\n");
return 1;
}
// 创建写入线程
ret = pthread_create(&write_tid, NULL, write_thread, &fd);
if (ret != 0) {
fprintf(stderr, "Failed to create write thread\n");
return 1;
}
// 等待读取线程和写入线程结束
pthread_join(read_tid, NULL);
pthread_join(write_tid, NULL);
close(fd);
return 0;
}
static int baudflag_arr[] = {
B921600, B460800, B230400, B115200, B57600, B38400,
B19200, B9600, B4800, B2400, B1800, B1200,
B600, B300, B150, B110, B75, B50
};
static int speed_arr[] = {
921600, 460800, 230400, 115200, 57600, 38400,
19200, 9600, 4800, 2400, 1800, 1200,
600, 300, 150, 110, 75, 50
};
int speed_to_flag(int speed)
{
int i;
for (i = 0; i < sizeof(speed_arr)/sizeof(int); i++) {
if (speed == speed_arr[i]) {
return baudflag_arr[i];
}
}
fprintf(stderr, "Unsupported baudrate, use 9600 instead!\n");
return B9600;
}
static struct termio oterm_attr;
int setup_port(int fd, int baud, int databits, int parity, int stopbits)
{
struct termio term_attr;
if (ioctl(fd, TCGETA, &term_attr) < 0) {
return -1;
}
memcpy(&oterm_attr, &term_attr, sizeof(struct termio));
term_attr.c_iflag &= ~(INLCR | IGNCR | ICRNL | ISTRIP);
term_attr.c_oflag &= ~(OPOST | ONLCR | OCRNL);
term_attr.c_lflag &= ~(ISIG | ECHO | ICANON | NOFLSH);
term_attr.c_cflag &= ~CBAUD;
term_attr.c_cflag |= CREAD | speed_to_flag(baud);
term_attr.c_cflag &= ~(CSIZE);
switch (databits) {
case 5:
term_attr.c_cflag |= CS5;
break;
case 6:
term_attr.c_cflag |= CS6;
break;
case 7:
term_attr.c_cflag |= CS7;
break;
case 8:
default:
term_attr.c_cflag |= CS8;
break;
}
switch (parity) {
case 1:
term_attr.c_cflag |= (PARENB | PARODD);
break;
case 2:
term_attr.c_cflag |= PARENB;
term_attr.c_cflag &= ~(PARODD);
break;
case 0:
default:
term_attr.c_cflag &= ~(PARENB);
break;
}
switch (stopbits) {
case 2:
term_attr.c_cflag |= CSTOPB;
break;
case 1:
default:
term_attr.c_cflag &= ~CSTOPB;
break;
}
term_attr.c_cc[VMIN] = 1;
term_attr.c_cc[VTIME] = 0;
if (ioctl(fd, TCSETAW, &term_attr) < 0) {
return -1;
}
if (ioctl(fd, TCFLSH, 2) < 0) {
return -1;
}
return 0;
}
int read_data(int fd, void *buf, int len)
{
int count;
int ret;
ret = 0;
count = 0;
//while (len > 0) {
ret = read(fd, (char*)buf + count, len);
if (ret < 1) {
fprintf(stderr, "Read error %s\n", strerror(errno));
//break;
}
count += ret;
len = len - ret;
//}
*((char*)buf + count) = 0;
return count;
}
int write_data(int fd, void *buf, int len)
{
int count;
int ret;
ret = 0;
count = 0;
while (len > 0) {
ret = write(fd, (char*)buf + count, len);
if (ret < 1) {
fprintf(stderr, "Write error %s\n", strerror(errno));
break;
}
count += ret;
len = len - ret;
}
return count;
}
void print_usage(char *program_name)
{
fprintf(stderr,
"*************************************\n"
" A Simple Serial Port Test Utility\n"
"*************************************\n\n"
"Usage:\n %s <device> <baud> <databits> <parity> <stopbits> \n"
" databits: 5, 6, 7, 8\n"
" parity: 0(None), 1(Odd), 2(Even)\n"
" stopbits: 1, 2\n"
"Example:\n %s /dev/ttyS4 115200 8 0 1\n\n",
program_name, program_name
);
}
