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- /******************************************************************************
- 版权所有: @copyright (C) 2024-2034 HaiYang Technology Corp. All rights reserved.
- 文件名称: shm.c
- 文件版本: 01.01
- 创建作者: zhaoyang
- 创建日期: 2025-08-21
- 功能说明: 共享内存驱动
- 其它说明:
- 修改记录:
- */
- #include "bsp_shm.h"
- #include <stdio.h>
- #include <stdlib.h>
- #include <stdint.h>
- #include <string.h>
- #include <fcntl.h>
- #include <unistd.h>
- #include <sys/ioctl.h>
- #include <sys/mman.h>
- #include <pthread.h>
- #include <stdbool.h>
- #include "bsp_share.h"
- uint8_t *SHM_BASE_R = NULL; //共享内存---读(从裸核读取数据)---开始地址
- uint8_t *SHM_BASE_W = NULL; //共享内存---写(向裸核写入数据)---开始地址
- struct test_data_s
- {
- uint16_t A;//标志A,写buf和crc前,A++
- uint8_t buf[1000];
- uint16_t crc;// buf的crc
- uint16_t B;//标志B,写buf和crc后,B++,且A=B
- };
- struct dev_co {
- char *name;
- pthread_t thread_id;
- //int fd_co; //mailbox 暂时去掉
- int fd_shm_w;
- int fd_shm_r;
- uint8_t *shm_w;
- uint8_t *shm_r;
- //struct co_io coio; //mailbox 暂时去掉
- };
- struct dev_co *pco0;
- static inline void dmsg_u8(uint8_t *data, int length, char *str)
- {
- int i, j;
- int tmp;
- printf("%s:\n", str);
- for (i = 0; i < (length / 16); i++)
- {
- for (j = 0; j < 16; j++)
- printf("%02x ", data[i * 16 + j]);
- printf("\n");
- }
- tmp = (length / 16) * 16;
- for (i = 0; i < (length % 16); i++)
- printf("%02x ", data[tmp + i]);
- if (length % 16)
- printf("\n");
- }
- /******************************************************************************
- 函数名称: shm_read
- 函数版本: 01.01
- 创建作者: zhaoyang
- 创建日期: 2025-08-21
- 函数说明: 读取共享内存的数据.
- 参数说明:
- addr:所以读取共享内存的地址
- len:需要读取数据的长度
- out_data:输出buf
- out_data_size:输出buf的长度
- 返回值: 成功返回读取数据的长度, 失败返回-1
- 修改记录:
- */
- int shm_read(uint32_t addr, uint32_t len, uint8_t *out_data, uint32_t out_data_size)
- {
- uint32_t i=0;
-
- if(SHM_BASE_R == NULL)
- return -1;
- if(out_data == NULL)
- return -1;
- if((len == 0) || (out_data_size == 0))
- return -1;
- for(i=0;i < len; i++)
- {
- if((addr+i) >= SHM_MAX_SIZE)
- return -1;
- if(i >= out_data_size)
- return -1;
- out_data[i] = SHM_BASE_R[addr+i];
- }
- return i;
- }
- /******************************************************************************
- 函数名称: shm_write
- 函数版本: 01.01
- 创建作者: zhaoyang
- 创建日期: 2025-08-21
- 函数说明: 向共享内存写入数据.
- 参数说明:
- addr:共享内存的地址
- data:写入数据
- len:写入数据长度
- 返回值: 成功返回写入数据的长度, 失败返回-1
- 修改记录:
- */
- int shm_write(uint32_t addr, uint8_t *data, uint32_t len)
- {
- uint32_t i=0;
- if(SHM_BASE_W == NULL)
- return -1;
- if(data == NULL)
- return -1;
- if(len == 0 )
- return -1;
- for(i=0;i < len; i++)
- {
- if((addr+i) >= SHM_MAX_SIZE)
- return -1;
- SHM_BASE_W[addr+i] = data[i];
- }
- return i;
- }
- static void *thread_co_test(void *arg)
- {
- // struct dev_co *co = (struct dev_co *)arg;
- // uint8_t *shm0 = co->shm_w;
- // uint8_t *shm1 = co->shm_r;
- int i;
- int state = 0;
- // int ret;
- // uint16_t crc = 0;
- // int crc_err_cnt = 0;
- // int cnt_alive = 0;
- // int cnt_busy = 0;
- // int cnt_crcerr = 0;
- // int cnt_good = 0;
- uint8_t test_buf_r[2000];
- // uint8_t test_buf_r_record[2000];
- uint8_t test_buf_w[2000];
- int nr = 0;
- // uint8_t lastcode = 0;
- // int cnt = 0;
- // int last_A = 0;
- // int last_B = 0;
- // struct test_data_s *p_rec_buf = (struct test_data_s*)test_buf_r;
- // uint16_t temval = 0;
-
- memset(test_buf_r, 0, 2000);
- memset(test_buf_w, 0, 2000);
- state = 1;
- while (1) {
- sleep(5);
- nr++;
- //读 分两种接口
- dmsg_u8(SHM_BASE_R, 10, "read:");
- shm_read(10, 10, test_buf_r, 2000);
- dmsg_u8(test_buf_r, 10, "shm_read:");
- //写 分两种接口
- for(i = 0; i< 10; i++)
- SHM_BASE_W[i] = nr+i;
- for(i = 0; i< 10; i++)
- test_buf_w[i] = nr+i+10;
- shm_write(10, test_buf_w, 10);
-
-
- #if 0
- if (state == 1) {
- last_A = shm1[0]+((uint16_t)shm1[1]<<8);
- last_B = shm1[sizeof(struct test_data_s)-2]+((uint16_t)shm1[sizeof(struct test_data_s)-1]<<8);
- if(last_A == last_B)
- {
- //idle
- memcpy(&test_buf_r,shm1,sizeof(struct test_data_s));
- if((p_rec_buf->A == p_rec_buf->B) && (p_rec_buf->A == last_A) && (last_A == shm1[0]+((uint16_t)shm1[1]<<8))
- && (last_B == shm1[sizeof(struct test_data_s)-2]+((uint16_t)shm1[sizeof(struct test_data_s)-1]<<8)))
- {
- //在拷贝过程中,数据没有被修改
- crc = CrcStr(p_rec_buf->buf,sizeof(p_rec_buf->buf));
- if(crc != p_rec_buf->crc)
- {
- #if 0
- printf("crc err!!! cal crc=%04X, read crc=%04X\n", crc,p_rec_buf->crc);
- dmsg_u8(test_buf_r, sizeof(struct test_data_s), "test_buf_r");
- dmsg_u8(shm1, sizeof(struct test_data_s), "shm1");
- printf("p_rec_buf->A=%d, last_A=%d\n", p_rec_buf->A,last_A);
- #endif
-
- cnt_crcerr++;
- }
- else
- {
- cnt_good++;
- }
- }
- else
- {
- //busy 裸核正在写数据
- cnt_busy++;
- }
- }
- else
- {
- //busy 裸核正在写数据
- cnt_busy++;
-
- }
- if(cnt_alive++ > 100000)
- {
- cnt_alive = 0;
- printf("cnt_busy=%d, cnt_crcerr=%d, cnt_good=%d\n", cnt_busy,cnt_crcerr,cnt_good);
- printf("cal crc=%04X, read crc=%04X\n", crc,p_rec_buf->crc);
- }
- usleep(10);
- }
- #endif
-
- }
-
- printf("thread co exit\r\n");
- pthread_exit(NULL);
- }
- //测试代码
- void shm_test(void)
- {
- int ret;
-
- if((ret = pthread_create(&pco0->thread_id, NULL, thread_co_test, pco0)) == 0)
- printf("thread co0 create success\r\n");
- else
- printf("thread co0 create fail ret=%d\r\n", ret);
- }
- /******************************************************************************
- 函数名称: shm_init
- 函数版本: 01.01
- 创建作者: zhaoyang
- 创建日期: 2025-08-21
- 函数说明: shm初始化.
- 参数说明:
- 无
- 返回值: 成功返回0, 失败返回-1
- 修改记录:
- */
- int shm_init(void)
- {
- // int ret;
- int i;
- unsigned int *tmp_buf;
- SHM_BASE_R = NULL;
- SHM_BASE_W = NULL;
- pco0 = malloc(sizeof(struct dev_co));
- memset(pco0, 0, sizeof(struct dev_co));
- if (shmem_init(&shmem_fd)) {
- printf("shmem_init failed!\n");
- return -1;
- }
-
- tmp_buf = mmap(NULL, shmem_fd.linux_read_len, PROT_READ|PROT_WRITE,
- MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
- if (tmp_buf <= 0) {
- printf("mmap failed!\n");
- return -1;
- }
-
- printf("tmp_buf:%lx\n", (unsigned long)tmp_buf);
- SHM_BASE_R = shmem_fd.linux_read->data; //共享内存---读(从裸核读取数据)---开始地址
- SHM_BASE_W = shmem_fd.linux_write->data; //共享内存---写(向裸核写入数据)---开始地址
- //初始化shm区
- //暂时初始化参数区
- for(i=0;i<SHM_ADDR_U_ADC_1;i++)
- {
- SHM_BASE_R[i] = 0;
- SHM_BASE_W[i] = 0;
- }
-
- // shm_test();//zhaoyang for test
- return 0;
- }
- /******************************************************************************
- 函数名称: shm_exit
- 函数版本: 01.01
- 创建作者: zhaoyang
- 创建日期: 2025-08-21
- 函数说明: shm反初始化.
- 参数说明: 无
- 返回值: 总是返回0.
- 修改记录:
- */
- int shm_exit(void)
- {
- //pthread_join(pco0->thread_id, NULL);
- return 0;
- }
-
-
-
-
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