readme.txt

卫星接受机控制卫星和LCD显示

//* Function Name       : send_msg_USART1
//* Object              : send the newly loaded messages stored in us1_send_dma[].
//*                       send_point1 is to memory the pointer of the first byte
//*                       to be sended. tx1_wr_pt is to memory the writing pointer
//*                       of the us1_send_dma[]
//* autor               : wang ping  
//* Input Parameters    : none
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : crc_fun
//* Object              : calculate the checksum.
//* autor               : wang ping  
//* Input Parameters    : msg[]:the bytes used to calculate; len: the length of
//*                       of the message.
//* Output Parameters   : crc_result:the checksum
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : check_crc
//* Object              : check the checksum of the received message.
//* autor               : wang ping  
//* Input Parameters    : len: the length of the message.
//* Output Parameters   : 1:the checksum is correct; 0:the checksum is error
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : pack_config_infor
//* Object              : pack the config informations of the odu.
//* autor               : wang ping  
//* Input Parameters    : subject:the subject number of the content to be packed
//* Output Parameters   : ack:the lenth of the message package.
//*                       if ack==0,means the subject number is invalid.
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : report_config_infor_pro
//* Object              : report the config informations of the odu.CommandID=0x03
//* autor               : wang ping  
//* Input Parameters    : subject:the subject number of the content to be reported
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : report_odu_options
//* Object              : report all the options of odu.
//*                       report when the system initiated,and then 2.5seconds once.
//* autor               : wang ping  
//* Input Parameters    : none
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : report_status_pro
//* Object              : report the dynamic parameters of odu.
//*                       report in main loop
//* autor               : wang ping  
//* Input Parameters    : subject:the subject number of the content to be reported
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : report_alarm_pro
//* Object              : report the alarm information of odu.
//*                       report immediately when alarm occurs
//* autor               : wang ping  
//* Input Parameters    : none
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : debug_report_pro
//* Object              : report the informations for debugging,used only by monitor.
//*                       report in main loop
//* autor               : wang ping  
//* Input Parameters    : subject:the subject number of the content to be reported
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : set_cmd_pro
//* Object              : execute the set command,and give the response
//* autor               : wang ping  
//* Input Parameters    : subject:the subject number of the content to be reported
//*                       component:the component ID in commands field
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : get_cmd_pro
//* Object              : handle the get command,and give the response
//* autor               : wang ping  
//* Input Parameters    : subject:the subject number of the content to be reported
//*                       component:the component ID in commands field
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : read_memory_pro
//* Object              : handle the read memory command,and give the response
//* autor               : wang ping  
//* Input Parameters    : addr:the beginning address of the content to read in 
//*                       AT91C_IFLASH.
//*                       bytes:the number of bytes to read.
//*                       component:the component ID in commands field
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : cmd_handle
//* Object              : the entrance of the command handling process.
//* autor               : wang ping  
//* Input Parameters    : none
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : recv_msg
//* Object              : Get a frame from the selected receiving DMA buffer.
//*                       revert the escape bytes,and save the frame in tx_buf[]
//* autor               : wang ping  
//* Input Parameters    : none
//* Output Parameters   : flag=0:Did not receive a frame.flag=1:received a frame
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : unpack
//* Object              : take out the two dilimiters from tx_buf[] and then save 
//*                       the information in infor_msg[].
//* autor               : wang ping  
//* Input Parameters    : none
//* Output Parameters   : i:the length of the information in infor_msg[]
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : load_msg
//* Object              : add the two dilimiters to the message and calculate the
//*                       checksum,handle the especial bytes,then load the new
//*                       frame to the DMA Tx buffer of both the USART ports.
//* autor               : wang ping  
//* Input Parameters    : msg:the information to be loaded;len:the number of bytes
//* Output Parameters   : snum:the length of the frame loaded in DMA tx buffer
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : load_msg
//* Object              : loading the receiver buffer to the other USART TX DMA
//*                       buffer.
//* autor               : wang ping  
//* Input Parameters    : none
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : odu_to_idu_com
//* Object              : the entrance of the communication process.
//* autor               : wang ping  
//* Input Parameters    : none
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
The global variables of lcodu_msg.c
unsigned char rx_buf[256]; //接收缓冲区
unsigned char tx_buf[256]; //发送缓冲区
unsigned char infor_msg[256];
unsigned int hd_flag=0;//接收数据阶段标志
unsigned int rx_index,rx_len,rx_flag,rx_index1;  //接收、发送数组下标及长度
unsigned int rx_rd_pt;//receiving buffer reading pointer
unsigned int tx_wr_pt;//sending buffer writing pointer
unsigned int rx1_rd_pt;//the other receiving buffer reading pointer
unsigned int tx1_wr_pt;//the other sending buffer writing pointer
unsigned int send_point;//the pointer of the first byte to be send (US0)
unsigned int send_point1;//the pointer of the first byte to be send(US1)

unsigned char escape_flag=0;//*escape_flag=1:the previous byte received is an escape byte

AT91PS_USART  u_pUSART0 = AT91C_BASE_US0;
AT91PS_USART  u_pUSART1 = AT91C_BASE_US1;
//*-----------------------------------------------------------------------------
/******************************************************************************/


/******************************************************************************/
functions in lcodu_spi.c
//*-----------------------------------------------------------------------------
//* Function Name       : SPI_int
//* Object              : initiate the SPI device
//* autor               : zhu dong po 
//* Input Parameters    : none
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : Init_TX_RF
//* Object              : initialization TX_RF PLL(hittie)
//* autor               : zhu dong po  
//* Input Parameters    : none
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : Init_RX_RF
//* Object              : initialization RX_RF PLL(hittie)
//* autor               : zhu dong po  
//* Input Parameters    : none
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : Set_TX_RX_RF0
//* Object              : set TX_RF/RX_RF  PLL frequency(hittie),unit:MHZ
//* autor               : zhu dong po  
//* Input Parameters    : channel == 1 (TX_RF),channel == 3 (RX_RF),
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : SPI_int2531
//* Object              : initiate the SPI device(vco embeded,2531)
//* autor               : zhu dong po
//* Input Parameters    : none
//* Output Parameters   : none
//*-----------------------------------------------------------------------------


//*-----------------------------------------------------------------------------
//* Function Name       : wirte_rigester2531
//* Object              : write the registers of the pll(vco embeded,2531)
//* autor               : zhu dong po  
//* Input Parameters    : msb，nsb，lsb，make up the value of the register 
//*                       channel == 1 (TX_RF),channel == 3 (RX_RF),
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : Init_TX_RF2531
//* Object              : initialization TX_RF PLL(vco embeded,2531)
//* autor               : zhu dong po  
//* Input Parameters    : none
//* Output Parameters   : none
//*-----------------------------------------------------------------------------

//*-----------------------------------------------------------------------------
//* Function Name       : Init_RX_RF2531
//* Object              : initialization RX_RF PLL(vco embeded,2531)
//* autor               : zhu dong po  
//* Input Parameters    : none
//* Output Parameters   : none
//*-----------------------------------------------------------------------------