Nguyễn Thế Vinh - căn bản lập trình CCS

[chanhtho_1991]

các anh ơi, em đang làm bài về mô phỏng các bài tập ví dụ trong thư viện của CCS4. em làm tới mô phỏng của 2 ví dụ này thì không biết làm sao nửa. các anh giúp em vẽ mạch mô phỏng trên protues với, hay là chỉ giúp em những linh kiện nào trong mạch, và cách kết nối sao với. em gửi ví dụ này các anh xem giúp và chỉ dẫn giúp em với, em chân thành cảm ơn

/////////////////////////////////////////////////////////////////////////
//// EX_CAN_CCS_A.C ////
//// ////
//// Example of CCS's CAN library, using the PIC18Fxx8. This ////
//// example was tested with and written for the CCS CAN Prototype ////
//// board. ////
//// ////
//// The CCS CAN Prototype board has four CAN nodes that communicate ////
//// to each other. Node A is the 18F458 with it's internal CAN ////
//// peripheral, Node B is a PIC16F87x connected to an external ////
//// MCP2510 CAN peripheral, and Node C and Node D are both MCP250xx ////
//// stand-alone CAN I/O expanders. This example is the firmware ////
//// for Node A. ////
//// ////
//// Every two seconds this firmware sends out a command to node B ////
//// to change it's leds (CAN ID 0x202) ////
//// ////
//// Upon change of the A/D reading, a value of 0-9 is sent to ////
//// Node D which is displayed on the 8-seg LCD (CAN ID 0x400) ////
//// ////
//// Pressing the Node A button sends a request to Node B (CAN ID ////
//// 0x201) for Node B's A/D reading, which Node B will respond ////
//// with a CAN message with it's A/D reading (with CAN ID 0x201). ////
//// Also, pressing the Node A button will change the LEDs on Node ////
//// C (CAN ID 0x300) ////
//// ////
//// Pressing Node C's buttons will cause Node A's buttons to change ////
//// (Node C transmits button changes with CAN ID 0x303) ////
//// ////
//// Using a serial port, you can examine all the CAN traffic as ////
//// seen by the 18xxx8. ////
//// ////
//// For more documentation on the CCS CAN library, see can-18xxx8.c ////
//// ////
//// Jumpers: ////
//// PCH pin C7 to RS232 RX, pin C6 to RS232 TX ////
//// ////
//// This example will work with the PCH compiler. ////
/////////////////////////////////////////////////////////////////////////
//// ////
//// Baud rate settings to use to connect to the CCS CAN Prototype ////
//// board at 20Mhz: ////
//// ////
//// Baud Rate Prescalar: 4 ////
//// Propagation Segment: 3xTq ////
//// Phase Segment 1: 6xTq ////
//// Phase Segment 2: 6xTq ////
//// Synchronized Jump Width: 1xTq ////
//// Sample Rate: 1x ////
//// Wakeup Filter: Off ////
//// ////
/////////////////////////////////////////////////////////////////////////
//// ////
//// Node C and D are seperate stand-alone MCP250xx CAN I/O ////
//// expanders. The CCS CAN Prototype board has these chips already ////
//// programmed correctly. However, if you wish to program your own ////
//// to work with this example, then use the provided .HEX files ////
//// a programmer capable of programming these chips. Or, make a ////
//// a new HEX file with these properties: ////
//// ////
//// NODE C: Set RX ID mask and buffers to receive ID 0x3**. (The ** ////
//// means make the least signifcant 8bits no-care in the mask). ////
//// Set TX1 buffer to ID 0x301, TX2 buffer to ID 0x302, TX3 buffer ////
//// to ID 0x303. Set GP0 to analog (and enable the A/D). Set GP1, ////
//// GP2 and GP3 to OUTPUT. Set GP4, GP5 and GP6 as INPUT with edge ////
//// trigger enable. Leave OPTREG2 clear, disable PWM1 and PWM2, ////
//// and disable scheduled transmission. Also, see the baud rate ////
//// settings above. ////
//// ////
//// NODE D: Set RX ID mask and buffers to receive ID 0x4**. (The ** ////
//// means make the least signifcant 8bits no-care in the mask). ////
//// Set TX1 buffer to ID 0x401, TX2 buffer to ID 0x402, TX3 buffer ////
//// to ID 0x403. Configure all ports as OUTPUT. Leave OPTREG2 ////
//// clear, disable PWM1 and PWM2, and disable scheduled ////
//// transmission. Also, see the baud rate settings above. ////
//// ////
/////////////////////////////////////////////////////////////////////////
//// (C) Copyright 1996,2003 Custom Computer Services ////
//// This source code may only be used by licensed users of the CCS ////
//// C compiler. This source code may only be distributed to other ////
//// licensed users of the CCS C compiler. No other use, ////
//// reproduction or distribution is permitted without written ////
//// permission. Derivative programs created using this software ////
//// in object code form are not restricted in any way. ////
/////////////////////////////////////////////////////////////////////////

#include <18F458.h>
#fuses HS,NOPROTECT,NOLVP,NOWDT
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)

#define CAN_DO_DEBUG TRUE

#include <can-18xxx8.c>

#define PIN_LED1 PIN_A5
#define PIN_LED2 PIN_B5
#define PIN_LED3 PIN_B4

#define LED1_HIGH output_low(PIN_LED1)
#define LED1_LOW output_high(PIN_LED1)
#define LED2_HIGH output_low(PIN_LED2)
#define LED2_LOW output_high(PIN_LED2)
#define LED3_HIGH output_low(PIN_LED3)
#define LED3_LOW output_high(PIN_LED3)

#define BUTTON PIN_A4

#define BUTTON_PRESSED !input(BUTTON)

int16 ms;

const char lcd_seg[10]={0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x1 0}; //0 for on, 1 for off

#int_timer2
void isr_timer2(void) {
ms++; //keep a running timer that increments every milli-second
}

#define ASK_FOR_ID_AD_B 0x201 //ask for AD info from CAN port B
#define SET_LED_ID_B 0x202 //set LEDs for CAN port B
#define RESPOND_TO_LED_C_ID 0x303
#define WRITE_REGISTER_C_ID 0x300
#define WRITE_REGISTER_D_ID 0x400

void main() {
int b_leds=0;
int c_leds=1;
int a_leds=0;
struct rx_stat rxstat;
int32 rx_id;
int buffer[8];
int rx_len;

int last_lcd_output=0xFF;
int i,curr_lcd_output;

setup_port_a(RA0_ANALOG);
setup_adc(ADC_CLOCK_INTERNAL);
set_adc_channel(0);

for(i=0;i<8;i++) {
buffer[i]=0;
}

LED1_HIGH;
LED2_HIGH;
LED3_HIGH;
printf("\r\n\r\nCCS CAN EXAMPLE\r\n");
delay_ms(1000);
LED1_LOW;
LED2_LOW;
LED3_LOW;

setup_timer_2(T2_DIV_BY_4,79,16); //setup up timer2 to interrupt every 1ms if using 20Mhz clock

can_init();

enable_interrupts(INT_TIMER2);
enable_interrupts(GLOBAL);

printf("\r\nRunning...");

while(TRUE)
{
if ( can_kbhit() )
{
printf("\r\n");
if(can_getd(rx_id, &buffer[0], rx_len, rxstat)) {
if (rx_id == ASK_FOR_ID_AD_B) {
printf("Channel B AD: %X\r\n",buffer[0]);
}
else if (rx_id == RESPOND_TO_LED_C_ID) { //node C is an mcp250x0 which sends out a message upon edge detection on IO
printf("Chaning LEDs\r\n"); //in_data[0]=iointfl, in_data[1]=gpio
a_leds=~(buffer[1]);
if (bit_test(a_leds,4)) {LED1_HIGH;} else {LED1_LOW;}
if (bit_test(a_leds,5)) {LED2_HIGH;} else {LED2_LOW;}
if (bit_test(a_leds,6)) {LED3_HIGH;} else {LED3_LOW;}
}
}
}

if ( can_tbe() && (ms > 2000)) //every two seconds, send new data if transmit buffer is empty
{
ms=0;

//change leds on port b
printf("\r\n\r\nSet LEDs on Port B to %U",b_leds);
can_putd(SET_LED_ID_B, &b_leds, 1, 1, 1, 0);
b_leds++;
if (b_leds > 7) {b_leds=0;}
}

if (BUTTON_PRESSED) {
while (BUTTON_PRESSED) {}
delay_ms(200);

//ask for AD on port B
printf("\r\n\r\nAsking for A/D reading on Port B...");
can_putd(ASK_FOR_ID_AD_B, 0, 1, 1, 1, 1);

//change LEDs on port C
buffer[0]=0x1E; //addr of gplat on 25050
buffer[1]=0x0E; //mask
buffer[2]=~(c_leds << 1); //new gplat values
printf("\r\nIncrementing LED on Port C");
can_putd(WRITE_REGISTER_C_ID, &buffer[0], 3, 1, 1, 0);
c_leds++;
if (c_leds > 7) {c_leds=0;}
}

//change lcd segment on port d
i=read_adc();
curr_lcd_output=i/26; //scale to 0-9
if (curr_lcd_output != last_lcd_output) {
last_lcd_output=curr_lcd_output;
printf("\r\nChanging 8-seg LCD on D to current A/D reading (%X, %X)",i,curr_lcd_output);
buffer[0]=0x1E; //addr of gplat
buffer[1]=0x7F; //mask
buffer[2]=lcd_seg[curr_lcd_output]; //new gplat values
can_putd(WRITE_REGISTER_D_ID, &buffer[0], 3, 1, 1, 0);
}
}
}