feat(soa_server):initial version of soa_server

source/spi_dev/spi4test.c

@@ -0,0 +1,139 @@
+/*
+ * spi_slave_recv_loop.c - SPI从设备持续接收程序
+ *
+ * 功能：SoC作为SPI从设备，配置与MCU主设备对齐，循环接收并打印数据
+ *       MCU每秒发送一帧（8字节）
+ *
+ * MCU主设备配置（需对齐）：
+ *   Mode      : SPI_MODE_0 (CPOL=0, CPHA=0)
+ *   Bits/Word : 8
+ *   Speed     : 1 MHz
+ *   发送数据   : {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08}
+ *
+ * 编译：aarch64-linux-gnu-gcc -o spi_slave_recv_loop spi_slave_recv_loop.c
+ * 运行：./spi_slave_recv_loop
+ * 退出：按 Ctrl+C
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <linux/spi/spidev.h>
+
+/* ========== SPI配置（必须与MCU主设备完全一致）========== */
+#define SPI_DEVICE      "/dev/spidev4.0"
+#define SPI_MODE        SPI_MODE_0      /* CPOL=1, CPHA=1 */
+#define SPI_BITS        8
+#define SPI_SPEED       1000000         /* 1MHz */
+#define FRAME_LEN       128              /* 每帧64字节 */
+/* ===================================================== */
+
+static volatile int keep_running = 1;
+
+void sigint_handler(int sig) {
+    (void)sig;
+    keep_running = 0;
+    printf("\n[INFO] User interrupted, exiting...\n");
+}
+
+int main(void)
+{
+    uint8_t buf[FRAME_LEN];
+    int fd, ret;
+    unsigned int frame_count = 0;
+
+    /* 注册退出信号 */
+    signal(SIGINT, sigint_handler);
+
+    /* 1. 打开 SPI 设备 */
+    fd = open(SPI_DEVICE, O_RDWR);
+    if (fd < 0) {
+        perror("open " SPI_DEVICE);
+        return 1;
+    }
+
+    /* 2. 配置 SPI 模式 */
+    uint8_t mode = SPI_MODE;
+	mode |= SPI_LSB_FIRST;
+    ret = ioctl(fd, SPI_IOC_WR_MODE, &mode);
+    if (ret == -1) {
+        perror("SPI_IOC_WR_MODE");
+        close(fd);
+        return 1;
+    }
+
+    /* 3. 配置每字位数 */
+    uint8_t bits = SPI_BITS;
+    ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
+    if (ret == -1) {
+        perror("SPI_IOC_WR_BITS_PER_WORD");
+        close(fd);
+        return 1;
+    }
+
+    /* 4. 配置最大时钟频率 */
+    uint32_t speed = SPI_SPEED;
+    ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
+    if (ret == -1) {
+        perror("SPI_IOC_WR_MAX_SPEED_HZ");
+        close(fd);
+        return 1;
+    }
+
+    /* 5. 回读验证配置 */
+    ioctl(fd, SPI_IOC_RD_MODE, &mode);
+    ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
+    ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
+
+    printf("========================================\n");
+    printf("SPI Slave Config (aligned with MCU)\n");
+    printf("========================================\n");
+    printf("Device      : %s\n", SPI_DEVICE);
+    printf("Mode        : %d (CPOL=%d, CPHA=%d)\n",
+           mode, (mode & SPI_CPOL) ? 1 : 0, (mode & SPI_CPHA) ? 1 : 0);
+    printf("Bits/Word   : %d\n", bits);
+    printf("Max Speed   : %d Hz\n", speed);
+    printf("Frame length: %d bytes\n", FRAME_LEN);
+    printf("========================================\n");
+    printf("Waiting for MCU (master) to send data...\n");
+    printf("Press Ctrl+C to stop.\n\n");
+
+    /* 6. 循环接收数据 */
+    while (keep_running) {
+        memset(buf, 0, FRAME_LEN);
+        ret = read(fd, buf, FRAME_LEN);
+        if (ret < 0) {
+            perror("read");
+            break;
+        } else if (ret == 0) {
+            /* 非阻塞模式可能返回0，但这里用了阻塞模式，一般不会出现 */
+            //continue;
+        }
+
+        frame_count++;
+        printf("\n========== Frame #%u (%d bytes) ==========\n", frame_count, ret);
+        printf("HEX  : ");
+        for (int i = 0; i < ret; i++)
+            printf("0x%02X ", buf[i]);
+        printf("\n");
+
+        printf("ASCII: ");
+        for (int i = 0; i < ret; i++)
+            printf(" %c  ", (buf[i] >= 0x20 && buf[i] < 0x7F) ? buf[i] : '.');
+        printf("\n");
+
+        printf("DEC  : ");
+        for (int i = 0; i < ret; i++)
+            printf("%3d ", buf[i]);
+        printf("\n");
+        printf("=========================================\n");
+    }
+
+    close(fd);
+    return 0;
+}