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DESKTOP-4HD0KC3\ZhangZhuo
2024-10-30 15:04:53 +08:00
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source/ZZ_PSDK_391/hal/hal_uart.c Normal file
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/**
********************************************************************
* @file hal_uart.c
* @brief
*
* @copyright (c) 2021 DJI. All rights reserved.
*
* All information contained herein is, and remains, the property of DJI.
* The intellectual and technical concepts contained herein are proprietary
* to DJI and may be covered by U.S. and foreign patents, patents in process,
* and protected by trade secret or copyright law. Dissemination of this
* information, including but not limited to data and other proprietary
* material(s) incorporated within the information, in any form, is strictly
* prohibited without the express written consent of DJI.
*
* If you receive this source code without DJI’s authorization, you may not
* further disseminate the information, and you must immediately remove the
* source code and notify DJI of its removal. DJI reserves the right to pursue
* legal actions against you for any loss(es) or damage(s) caused by your
* failure to do so.
*
*********************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include <dji_logger.h>
#include "hal_uart.h"
/* Private constants ---------------------------------------------------------*/
#define UART_DEV_NAME_STR_SIZE (128)
#define DJI_SYSTEM_CMD_STR_MAX_SIZE (64)
#define DJI_SYSTEM_RESULT_STR_MAX_SIZE (128)
/* Private types -------------------------------------------------------------*/
typedef struct {
int uartFd;
} T_UartHandleStruct;
/* Private values -------------------------------------------------------------*/
/* Private functions declaration ---------------------------------------------*/
/* Exported functions definition ---------------------------------------------*/
T_DjiReturnCode HalUart_Init(E_DjiHalUartNum uartNum, uint32_t baudRate, T_DjiUartHandle *uartHandle)
{
T_UartHandleStruct *uartHandleStruct;
struct termios options;
struct flock lock;
T_DjiReturnCode returnCode = DJI_ERROR_SYSTEM_MODULE_CODE_SUCCESS;
char uartName[UART_DEV_NAME_STR_SIZE];
char systemCmd[DJI_SYSTEM_CMD_STR_MAX_SIZE];
char *ret = NULL;
char lineBuf[DJI_SYSTEM_RESULT_STR_MAX_SIZE] = {0};
FILE *fp;
uartHandleStruct = malloc(sizeof(T_UartHandleStruct));
if (uartHandleStruct == NULL)
{
return DJI_ERROR_SYSTEM_MODULE_CODE_MEMORY_ALLOC_FAILED;
}
if (uartNum == DJI_HAL_UART_NUM_0)
{
strcpy(uartName, LINUX_UART_DEV1);
} else if (uartNum == DJI_HAL_UART_NUM_1)
{
strcpy(uartName, LINUX_UART_DEV2);
} else {
goto free_uart_handle;
}
#ifdef USE_CLION_DEBUG
sprintf(systemCmd, "ls -l %s", uartName);
fp = popen(systemCmd, "r");
if (fp == NULL) {
goto free_uart_handle;
}
ret = fgets(lineBuf, sizeof(lineBuf), fp);
if (ret == NULL) {
goto close_fp;
}
if (strstr(lineBuf, "crwxrwxrwx") == NULL) {
USER_LOG_ERROR("Can't operation the device. "
"Probably the device has not operation permission. "
"Please execute command 'sudo chmod 777 %s' to add permission. ", uartName);
goto close_fp;
}
#else
sprintf(systemCmd, "chmod 777 %s", uartName);
fp = popen(systemCmd, "r");
if (fp == NULL) {
return DJI_ERROR_SYSTEM_MODULE_CODE_SYSTEM_ERROR;
}
#endif
uartHandleStruct->uartFd = open(uartName, (unsigned) O_RDWR | (unsigned) O_NOCTTY | (unsigned) O_NDELAY);
if (uartHandleStruct->uartFd == -1) {
goto close_fp;
}
// Forbid multiple psdk programs to access the serial port
lock.l_type = F_WRLCK;
lock.l_pid = getpid();
lock.l_whence = SEEK_SET;
lock.l_start = 0;
lock.l_len = 0;
if (fcntl(uartHandleStruct->uartFd, F_GETLK, &lock) < 0) {
goto close_uart_fd;
}
if (lock.l_type != F_UNLCK) {
goto close_uart_fd;
}
lock.l_type = F_WRLCK;
lock.l_pid = getpid();
lock.l_whence = SEEK_SET;
lock.l_start = 0;
lock.l_len = 0;
if (fcntl(uartHandleStruct->uartFd, F_SETLKW, &lock) < 0) {
goto close_uart_fd;
}
if (tcgetattr(uartHandleStruct->uartFd, &options) != 0) {
goto close_uart_fd;
}
switch (baudRate) {
case 115200:
cfsetispeed(&options, B115200);
cfsetospeed(&options, B115200);
break;
case 230400:
cfsetispeed(&options, B230400);
cfsetospeed(&options, B230400);
break;
case 460800:
cfsetispeed(&options, B460800);
cfsetospeed(&options, B460800);
break;
case 921600:
cfsetispeed(&options, B921600);
cfsetospeed(&options, B921600);
break;
case 1000000:
cfsetispeed(&options, B1000000);
cfsetospeed(&options, B1000000);
break;
default:
goto close_uart_fd;
}
options.c_cflag |= (unsigned) CLOCAL;
options.c_cflag |= (unsigned) CREAD;
options.c_cflag &= ~(unsigned) CRTSCTS;
options.c_cflag &= ~(unsigned) CSIZE;
options.c_cflag |= (unsigned) CS8;
options.c_cflag &= ~(unsigned) PARENB;
options.c_iflag &= ~(unsigned) INPCK;
options.c_cflag &= ~(unsigned) CSTOPB;
options.c_oflag &= ~(unsigned) OPOST;
options.c_lflag &= ~((unsigned) ICANON | (unsigned) ECHO | (unsigned) ECHOE | (unsigned) ISIG);
options.c_iflag &= ~((unsigned) BRKINT | (unsigned) ICRNL | (unsigned) INPCK | (unsigned) ISTRIP | (unsigned) IXON);
options.c_cc[VTIME] = 0;
options.c_cc[VMIN] = 0;
tcflush(uartHandleStruct->uartFd, TCIFLUSH);
if (tcsetattr(uartHandleStruct->uartFd, TCSANOW, &options) != 0) {
goto close_uart_fd;
}
*uartHandle = uartHandleStruct;
pclose(fp);
return returnCode;
close_uart_fd:
close(uartHandleStruct->uartFd);
close_fp:
pclose(fp);
free_uart_handle:
free(uartHandleStruct);
return DJI_ERROR_SYSTEM_MODULE_CODE_SYSTEM_ERROR;
}
T_DjiReturnCode HalUart_DeInit(T_DjiUartHandle uartHandle)
{
int32_t ret;
T_UartHandleStruct *uartHandleStruct = (T_UartHandleStruct *) uartHandle;
if (uartHandle == NULL) {
return DJI_ERROR_SYSTEM_MODULE_CODE_UNKNOWN;
}
ret = close(uartHandleStruct->uartFd);
if (ret < 0) {
return DJI_ERROR_SYSTEM_MODULE_CODE_SYSTEM_ERROR;
}
free(uartHandleStruct);
return DJI_ERROR_SYSTEM_MODULE_CODE_SUCCESS;
}
T_DjiReturnCode HalUart_WriteData(T_DjiUartHandle uartHandle, const uint8_t *buf, uint32_t len, uint32_t *realLen)
{
int32_t ret;
T_UartHandleStruct *uartHandleStruct = (T_UartHandleStruct *) uartHandle;
if (uartHandle == NULL || buf == NULL || len == 0 || realLen == NULL) {
return DJI_ERROR_SYSTEM_MODULE_CODE_INVALID_PARAMETER;
}
ret = write(uartHandleStruct->uartFd, buf, len);
if (ret >= 0) {
*realLen = ret;
} else {
return DJI_ERROR_SYSTEM_MODULE_CODE_SYSTEM_ERROR;
}
return DJI_ERROR_SYSTEM_MODULE_CODE_SUCCESS;
}
T_DjiReturnCode HalUart_ReadData(T_DjiUartHandle uartHandle, uint8_t *buf, uint32_t len, uint32_t *realLen)
{
int32_t ret;
T_UartHandleStruct *uartHandleStruct = (T_UartHandleStruct *) uartHandle;
if (uartHandle == NULL || buf == NULL || len == 0 || realLen == NULL) {
return DJI_ERROR_SYSTEM_MODULE_CODE_INVALID_PARAMETER;
}
ret = read(uartHandleStruct->uartFd, buf, len);
if (ret >= 0) {
*realLen = ret;
} else {
return DJI_ERROR_SYSTEM_MODULE_CODE_SYSTEM_ERROR;
}
return DJI_ERROR_SYSTEM_MODULE_CODE_SUCCESS;
}
T_DjiReturnCode HalUart_GetStatus(E_DjiHalUartNum uartNum, T_DjiUartStatus *status)
{
if (uartNum == DJI_HAL_UART_NUM_0) {
status->isConnect = true;
} else if (uartNum == DJI_HAL_UART_NUM_1) {
status->isConnect = true;
} else {
return DJI_ERROR_SYSTEM_MODULE_CODE_INVALID_PARAMETER;
}
return DJI_ERROR_SYSTEM_MODULE_CODE_SUCCESS;
}
/* Private functions definition-----------------------------------------------*/
/****************** (C) COPYRIGHT DJI Innovations *****END OF FILE****/