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增加2路拉流脚本；修改串口转udp包，增加视频信号字节。

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xu
2026-09-14 14:15:43 +08:00
parent ebffc5a16d
commit 3b1e7a7082
4 changed files with 244 additions and 33 deletions
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mpp/sample/uart2net_mesh/ctrl_pnl.c
+94 -30
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@@ -32,6 +32,17 @@
#define CHECKSUM_END 30 /* 校验和覆盖 byte0..byte30（含） */
#define NET_FRAME_MAX_LEN 256 /* recvfrom 缓冲大小 */
#define BYTE_NOSIG0 25 /* byte25 = 视频流0无信号标志（1=无信号，0=有信号） */
#define BYTE_NOSIG1 26 /* byte26 = 视频流1无信号标志（1=无信号，0=有信号） */
#define BYTE_RSSI1 28 /* 信号包=RSSI1；设备包=哨兵 */
#define BYTE_RSSI2 29 /* 信号包=RSSI2；设备包=哨兵 */
#define SIG_MARK 0x5A /* 设备包 byte28/29 哨兵值 */
#define SIGNAL_INTERVAL_MS 100 /* 独立信号包发送间隔(ms) */
#define FRAME_HEAD 0x11 /* 上行帧帧头(byte0)，面板校验要求 */
#define FRAME_TAIL 0x22 /* 上行帧帧尾(byte30)，面板校验要求 */
#define FRAME_HEAD_TX 0xAA /* 下行帧帧头(byte0)，设备→面板 */
/* ===================== 共享内存 ===================== */
#define SHM_MSG_NAME "/video_switch"
#define SHM_MODE_IDX 0 /* switch_mode -> shm[0]（即 switch_video[0]） */
@@ -94,6 +105,11 @@ static int read_gpio72(void)
return (val == '0') ? 1 : 0; /* 反相：GPIO=1 → 0，GPIO=0 → 1 */
}
static long elapsed_ms(struct timeval *start, struct timeval *end)
{
return (end->tv_sec - start->tv_sec) * 1000L
+ (end->tv_usec - start->tv_usec) / 1000L;
}
int init_net_recv(int port){
@@ -229,16 +245,18 @@ void *net_recv(void *arg)
}
/* 2) 校验和 = byte0..byte30 求和取低8位 */
/* 构造下行帧：byte0=0xAA 帧头，byte1..29 原样，byte30=0xBB 帧尾 */
frame_out[0] = FRAME_HEAD_TX; /* [0] 帧头 0xAA */
memcpy(frame_out + 1, buffer_cmd + 1, PAYLOAD_LEN - 1); /* [1..29] 原样 */
frame_out[PAYLOAD_LEN] = NET_TAIL; /* [30] 帧尾 0xBB */
/* 校验和 = byte0..byte30 求和取低8位，写入 byte31 */
sum = 0;
for (k = 0; k <= CHECKSUM_END; k++)
sum += (unsigned char)buffer_cmd[k];
sum += (unsigned char)frame_out[k];
checksum = sum & 0xFF;
frame_out[PAYLOAD_LEN + 1] = checksum; /* [31] 校验和 */
/* 3) 转发：去掉 byte30/31，byte0..29 原样 + 帧尾 + 校验和（仍 32 字节） */
memcpy(frame_out, buffer_cmd, PAYLOAD_LEN); /* 0..29，共 30 字节 */
frame_out[PAYLOAD_LEN] = NET_TAIL; /* [30] 帧尾 */
frame_out[PAYLOAD_LEN + 1] = checksum; /* [31] 校验和 */
#if 0
/* 打印发出的包 */
@@ -287,9 +305,12 @@ int main (int argc, char *argv[])
char buffer_send[100];
int buffer_len;
n_read = uart_init(ROUTE_UART, "/dev/ttyAMA2", 115200, 'N');
struct timeval tv_sig = {0, 0}, tv_now;
char sig_frame[NET_FRAME_LEN];
n_read = uart_init(ROUTE_UART, "/dev/ttyAMA4", 115200, 'N');
if(n_read <=0 ) {
printf("open /dev/ttyAMA2 failed\n");
printf("open /dev/ttyAMA4 failed\n");
return -1;
}
@@ -307,31 +328,74 @@ int main (int argc, char *argv[])
pthread_init();
while(1){
n_read = uart_read(ROUTE_UART, _rx_data);
if(n_read > 0 ){
if (n_read >= 32) { /* 完整 32 字节帧才处理 */
int k, sum = 0;
while(1){
n_read = uart_read(ROUTE_UART, _rx_data);
if(n_read > 0 ){
int k, sum = 0;
_rx_data[27] = (char)read_gpio72(); /* byte27 = GPIO9_0 反相值 */
if (buffer_param) { /* 写入：byte28/29 = RSSI 信号强度 */
_rx_data[28] = (char)buffer_param[1];
_rx_data[29] = (char)buffer_param[2];
printf("RSSI1 =%d RSSI2 =%d",buffer_param[1],buffer_param[2]);
/* 收包校验：完整 32 字节帧，帧头 0x11、帧尾 0x22、byte31 校验和正确，否则丢弃 */
if (n_read < NET_FRAME_LEN) {
printf("drop bad frame: len=%d\n", n_read);
continue;
}
if ((unsigned char)_rx_data[0] != FRAME_HEAD ||
(unsigned char)_rx_data[CHECKSUM_END] != FRAME_TAIL) {
printf("drop bad frame: head=%02x tail=%02x\n",
(unsigned char)_rx_data[0], (unsigned char)_rx_data[CHECKSUM_END]);
continue;
}
for (k = 0; k <= CHECKSUM_END; k++)
sum += (unsigned char)_rx_data[k];
if ((unsigned char)_rx_data[31] != (sum & 0xFF)) {
printf("drop bad frame: checksum=%02x expect=%02x\n",
(unsigned char)_rx_data[31], (unsigned char)(sum & 0xFF));
continue;
}
/* byte28/29 固定哨兵值，RSSI 改由独立信号包承载 */
_rx_data[BYTE_RSSI1] = (char)SIG_MARK;
_rx_data[BYTE_RSSI2] = (char)SIG_MARK;
/* 和校验：byte0..byte30 求和取低 8 位，写入 byte31 */
sum = 0;
for (k = 0; k <= CHECKSUM_END; k++)
sum += (unsigned char)_rx_data[k];
_rx_data[31] = (char)(sum & 0xFF);
sendto(socket_descriptor, _rx_data, NET_FRAME_LEN, 0, (struct sockaddr *)&address, sizeof(address));
}
/* 独立信号包：与串口数据无关，每 SIGNAL_INTERVAL_MS 发一次；其余字节填 0 */
gettimeofday(&tv_now, NULL);
if (tv_sig.tv_sec == 0 || elapsed_ms(&tv_sig, &tv_now) >= SIGNAL_INTERVAL_MS) {
int k, sum = 0;
memset(sig_frame, 0, NET_FRAME_LEN);
sig_frame[0] = (char)FRAME_HEAD; /* byte0 = 0x11 */
/* byte25/26 = 视频流0/1无信号，byte27 = GPIO */
sig_frame[BYTE_NOSIG0] = (shm_msg && shm_msg[2] == 0x55) ? 1 : 0;
sig_frame[BYTE_NOSIG1] = (shm_msg && shm_msg[3] == 0x55) ? 1 : 0;
sig_frame[27] = (char)read_gpio72();
if (buffer_param) {
sig_frame[BYTE_RSSI1] = (char)buffer_param[1];
sig_frame[BYTE_RSSI2] = (char)buffer_param[2];
//打印发出的信号值
printf("signal: RSSI1=%d RSSI2=%d\n", buffer_param[1], buffer_param[2]);
}
sig_frame[PAYLOAD_LEN] = (char)FRAME_TAIL; /* byte30 = 0x22 */
for (k = 0; k <= CHECKSUM_END; k++)
sum += (unsigned char)sig_frame[k];
sig_frame[CHECKSUM_END + 1] = (char)(sum & 0xFF);
sendto(socket_descriptor, sig_frame, NET_FRAME_LEN, 0, (struct sockaddr *)&address, sizeof(address));
tv_sig = tv_now;
}
/* 和校验：byte0..byte30 求和取低 8 位，写入 byte31 */
for (k = 0; k <= 30; k++)
sum += (unsigned char)_rx_data[k];
_rx_data[31] = (char)(sum & 0xFF);
}
sendto(socket_descriptor, _rx_data, n_read, 0, (struct sockaddr *)&address, sizeof(address));
}
}
}
mpp/sample/uart2net_mesh/uart2net
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