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- #include "p89v51rx2.h"
- #include <stdio.h>
- #define OUTPUT_ON_LED
- #define OPCODE 'R'
- unsigned char rcv_data[10];
- bit rcv_data_flag = 0, byte_rx = 0, byte_tx = 0;//, tx_button = 0;
- unsigned char rcv_index = 0;
- sbit tx_button = P1^0;
- unsigned char g_opcode_received=0;
- //unsigned char g_buff[5] = "EMPTY";
- unsigned char g_idx=0;
- unsigned char rx;
- #define MAX_MSG_LEN 8
- #define LED_PORT P2
- /* Table of CRC values for highorder byte */
- code unsigned char auchCRCHi[] = {
- 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,
- 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
- 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01,
- 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
- 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81,
- 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
- 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01,
- 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
- 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,
- 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
- 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01,
- 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
- 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,
- 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
- 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01,
- 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
- 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,
- 0x40
- } ;
- /* Table of CRC values for loworder byte */
- code char auchCRCLo[] = {
- 0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4,
- 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,
- 0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD,
- 0x1D, 0x1C, 0xDC, 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
- 0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, 0x36, 0xF6, 0xF7,
- 0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,
- 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE,
- 0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
- 0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2,
- 0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,
- 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB,
- 0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
- 0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, 0x50, 0x90, 0x91,
- 0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,
- 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88,
- 0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
- 0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83, 0x41, 0x81, 0x80,
- 0x40
- } ;
- unsigned short CRC16(unsigned char *puchMsg, unsigned char usDataLen)
- {
- unsigned char uchCRCHi = 0xFF ; /* high byte of CRC initialized */
- unsigned char uchCRCLo = 0xFF ; /* low byte of CRC initialized */
- unsigned uIndex ; /* will index into CRC lookup table */
- while (usDataLen--) /* pass through message buffer */
- {
- uIndex = uchCRCHi ^ *puchMsg++ ; /* calculate the CRC */
- uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ;
- uchCRCLo = auchCRCLo[uIndex] ;
- }
- //*(puchMsg + 6) = uchCRCHi;
- //*(puchMsg + 7) = uchCRCLo;
- return (uchCRCHi << 8 | uchCRCLo) ;
- }
- // Serial and SPI ISR
- void rcv_isr () interrupt 4
- {
- if(RI)
- {
- rcv_data[rcv_index] = SBUF;
- rcv_index++;
- if(rcv_index == MAX_MSG_LEN)
- {
- rcv_data_flag = 1;
- rcv_index = 0;
- }
- RI = 0;
- }
- if(SPCFG^7)
- {
- SPCFG = 0x00; // Make SPIF=0;
- rx = SPDAT; // Read Data from the Register
- if (g_opcode_received == 1)
- {
- //SPDAT = g_buff[g_idx++];
- SPDAT = rcv_data[g_idx++];
- }
- if (g_idx >= MAX_MSG_LEN)
- {
- g_opcode_received=0;
- g_idx=0;
- }
- if (rx == OPCODE)
- {
- g_opcode_received=1;
- g_idx=0;
- //SPDAT = g_buff[g_idx++];
- SPDAT = rcv_data[g_idx++];
- }
- }
- }
- void tx_cmd(unsigned char *cmd) {
- unsigned char i;
- for(i=0; i<8; i++) {
- SBUF = cmd[i];
- while(!TI);
- TI = 0;
- }
- }
- /*
- void serial_SPI() interrupt 4 /// note that SPI and serial share the same interrupt vector 0x23 i.e 35 in decimal && 35 - 3 = 32 && 32 / 8 = 4 hence the interrupt no....4
- {
- if(SPCFG^7)
- {
- SPCFG = 0x00; // Make SPIF=0;
- rx = SPDAT; // Read Data from the Register
- if (g_opcode_received == 1)
- {
- SPDAT = g_buff[g_idx++];
- }
- if (g_idx >=5 )
- {
- g_opcode_received=0;
- }
- if (rx == 'R')
- {
- g_opcode_received=1;
- g_idx=0;
- SPDAT = g_buff[g_idx++];
- }
- }
- }
- */
- void main (void)
- {
- // Enable serial receive interrupt
- //unsigned char puchMsg[] = {0x01,0x04,0x00,0x40,0x00,0x02};
- unsigned char cmdReadFreq[8] = {
- 0x01, // Slave Address
- 0x04, // Function Read Input registers
- 0x00, // Offset Addr Hi
- 0x2C, // Offset Addr Lo
- 0x00, // Len Hi
- 0x02, // Len Lo
- 0x00, // CRC Hi
- 0x00, // CRC Lo
- };
- unsigned char cmdReadKWH[8] = {
- 0x01, // Slave Address
- 0x04, // Function Read Input registers
- 0x02, // Offset Addr Hi
- 0x02, // Offset Addr Lo
- 0x00, // Len Hi
- 0x02, // Len Lo
- 0x00, // CRC Hi
- 0x00, // CRC Lo
- };
- /* unsigned char cmdReadFreq[] = {
- 'A', // Slave Address
- 'B', // Function Read Input registers
- 'C', // Offset Addr Hi
- 'D', // Offset Addr Lo
- 'E', // Len Hi
- 'F', // Len Lo
- 'G', // CRC Hi
- 'H', // CRC Lo
- };*/
- unsigned char usDataLen = 6;
- unsigned short crcVal;
- unsigned char i;
- unsigned char k;
- unsigned int j;
- //UART configuration on Timer1 for 4800 baud, 1 stop, 1 start, eve parity
- SCON = 0x50; /* SCON: mode 3, 9-bit UART, enable rcvr */
- TMOD |= 0x20; /* TMOD: timer 1, mode 2, 8-bit reload */
- TH1 = 0xfa; /* TH1: reload value for 2400 baud */
- TR1 = 1; /* TR1: timer 1 run */
- //TI = 1; /* TI: set TI to send first char of UART */
- EA = 1; //global interrupt
- //ES = 1; //serial interrupt
- ES0 = 1;
- SPCTL = 0xCC; /// SPI slave Mode
- SPCFG = 0x00;
- P2 = 0; // Init Port 2
- //crcVal = CRC16(&cmdReadFreq[0],usDataLen);
- crcVal = CRC16(&cmdReadFreq[0],usDataLen);
- //printf("crcVal = %0x \n",crcVal);
- cmdReadFreq[6] = (crcVal & 0xFF00) >> 8;
- cmdReadFreq[7] = (crcVal & 0xFF);
- cmdReadFreq[8] = '\0';
- tx_cmd(&cmdReadFreq[0]);
- while(1)
- {
- #ifdef OUTPUT_ON_LED
- if(rcv_data_flag)
- {
- for(i=5; i<7; i++)
- {
- LED_PORT = rcv_data[i];
- TI = 0;
- // Delay
- for(k=0; k<1; k++)
- {
- for(j=0; j<65535; j++);
- }
- }
- rcv_data_flag = 0;
- }
- //SBUF = rcv_data[0];
- #else //OUTPUT_ON_SERIAL
- if(rcv_data_flag)
- {
- if(!tx_button)
- {
- for(i=0; i<9; i++)
- {
- SBUF = rcv_data[i];
- while(!TI);
- TI = 0;
- }
- rcv_data_flag = 0;
- }
- }
- #endif
- }
- }
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