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main.c
639 lines (575 loc) · 18.8 KB
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main.c
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/******************************************************************************/
/* Files to Include */
/******************************************************************************/
#if defined(__XC)
#include <xc.h> /* XC8 General Include File */
#elif defined(HI_TECH_C)
#include <htc.h> /* HiTech General Include File */
#elif defined(__18CXX)
#include <p18cxxx.h> /* C18 General Include File */
#endif
#if defined(__XC) || defined(HI_TECH_C)
#include <stdint.h> /* For uint8_t definition */
#include <stdbool.h> /* For true/false definition */
#include <stdio.h>
#endif
#include "system.h" /* System funct/params, like osc/peripheral config */
#include "spectrum.h"
#include "uartcomms.h"
#include "bus.h"
#include "sram.h"
#include "counter.h"
#include <pic18.h>
#include "Lab2Slave/datatypes.h"
#include "Lab2Slave/network.h"
// Peripheral library includes
#include "mcc_generated_files/adc.h"
#include "mcc_generated_files/eusart1.h"
#include "mcc_generated_files/mcc.h"
#include "mcc_generated_files/interrupt_manager.h"
// Defines for functionality
#define MODE_FREQ 0
#define MODE_PER 1
#define MODE_COUNT 2
#define MODE_ANALYSIS 3
#define MODE_INTERVAL 4
#define NUM_MODES 20
#define TEST_LOOP(CODE) \
char data; \
while(1) { \
data = EUSART1_Read(); \
if(data == 't') { \
CODE \
} else if (data == ('\n') || data == '\r') { \
return; \
} \
}
/******************************************************************************/
/* User Global Variable Declaration */
/******************************************************************************/
/* i.e. uint8_t <variable_name>; */
/******************************************************************************/
/* Main Program */
/******************************************************************************/
// Prototypes
// Some functions here will be moved out to utilities lib.
void testUart();
void testSendString();
void testSendNum();
void testSRAM();
void testSPI();
void measureFreq(int resolution, uint8_t currAddr);
void measurePeriod(int resolution, uint8_t currAddr);
void measureCount(int resolution, uint8_t currAddr);
void measureInterval(int resolution, uint8_t currAddr);
void printHelpInfo();
void printFromSRAM(uint8_t currAddr);
void remoteNode(uint8_t resolution);
enum DataType sramDataTypes[16] = {NONE};
void main(void)
{
/* Configure the oscillator for the device */
ConfigureOscillator();
INTERRUPT_GlobalInterruptEnable();
INTERRUPT_PeripheralInterruptEnable();
SYSTEM_Initialize();
//Init I2c
init_SRAM();
//*********************************************
// Tests for System functionality
//*********************************************
// Test dat uart
testUart();
// Test sending a string
testSendString();
// Test sending a number
testSendNum();
// Test SRAM read/write
testSRAM();
// Test SPI
testSPI();
// Default Posedge activation.
int edgeActivation = 0;
// Default low resolution
int resolution = 0;
// Default low frequency measuring
int frequency = 0;
uint16_t peak_f = 0;
// When high, runs a test, when low does not.
int runTestFlag = 0;
int measureMode = 0;
uint8_t currAddr = 0;
while(1)
{
// Char to capture command from uart or elsewhere
char inputRead = ' ';
// If there is a char to read, read it.
if(PIR1bits.RC1IF) {
inputRead = EUSART1_Read();
}
// Switch from high to low resolution on button switch
if(!RES_SWITCH_GetValue()) {
while(!RES_SWITCH_GetValue());
if(resolution) {
inputRead = 'l';
} else {
inputRead = 'h';
}
}
// Toggle measure/display mode
if(!DISP_TOGGLE_GetValue()) {
while(!DISP_TOGGLE_GetValue());
inputRead = 't';
}
// Select function based on input
if(inputRead != ' ') {
switch(inputRead) {
// Frequency
case 'f':
measureMode = MODE_FREQ;
sendString("Frequency Mode\r\n");
runTestFlag = 1;
break;
// Period
case 'p':
measureMode = MODE_PER;
sendString("Periodic Mode\r\n");
runTestFlag = 1;
break;
// Count
case 'c':
measureMode = MODE_COUNT;
sendString("Counting Mode\r\n");
runTestFlag = 1;
break;
// Time Interval
case 'd':
measureMode = MODE_INTERVAL;
sendString("Interval Mode\r\n");
runTestFlag = 1;
break;
// Analysis
case 'a':
measureMode = MODE_ANALYSIS;
sendString("Analysis Mode\r\n");
runTestFlag = 1;
break;
// Set resolution high
case 'h':
resolution = 1;
sendString("High Resolution\r\n");
break;
// Set resolution low
case 'l':
resolution = 0;
sendString("Low Resolution\r\n");
break;
// Print help information
case 'i':
printHelpInfo();
break;
// Prints from sram
case 's':
if(measureMode < 5) {
measureMode = 5;
} else if(measureMode == 20) {
measureMode = 5;
} else {
measureMode += 1;
}
runTestFlag = 1;
break;
// Request remote information over network
case 'r':
remoteNode(resolution);
break;
// Toggles mode
case 't':
measureMode = (measureMode + 1) % NUM_MODES;
runTestFlag = 1;
break;
default :
break;
}
}
// Run operations
if(runTestFlag) {
runTestFlag = 0;
switch(measureMode) {
// Frequency
case MODE_FREQ:
measureFreq(resolution, currAddr);
currAddr = (currAddr + 2) % 32;
break;
case MODE_PER:
measurePeriod(resolution, currAddr);
currAddr = (currAddr + 2) % 32;
break;
case MODE_COUNT:
measureCount(resolution, currAddr);
currAddr = (currAddr + 2) % 32;
break;
case MODE_INTERVAL:
measureInterval(resolution, currAddr);
currAddr = (currAddr + 2) % 32;
break;
case MODE_ANALYSIS:
peak_f = (uint16_t)fftSingleCycle();
// Write bottom 16 bits to memory
writeSRAM(currAddr, (uint8_t)(0xFF & peak_f));
writeSRAM((currAddr + 1) % 32, (uint8_t)(0xFF & (peak_f >> 8)));
sramDataTypes[currAddr/2] = ANALYSIS;
// Increment currAddr.
currAddr = (currAddr + 2) % 32;
// Print message
char message[32];
sprintf(message, "f: %d Hz \r\n", peak_f);
sendString(message);
break;
// Read from memory location if <20
default :
// Read from SRAM locations 1-16
if((measureMode > 3) && (measureMode < NUM_MODES)) {
// Read location measureMode - 4
printFromSRAM((measureMode - 4)*2);
} else {
measureMode = 0;
}
break;
}
}
}
}
// Prints help information for how to use device.
void printHelpInfo() {
sendString("Accepted characters from command line: \r\n f: measure frequency, p: measure period,\
c: measure count, a: analyze noise, h: set resolution high, l: set resolution low, i: print help information,\
s: print data from sram, t: toggle through modes. Can be used to toggle through addresses of sram.\r\n\
Accepted inputs from buttons: switch resolution, toggle display state.\r\n" );\
}
void printData(uint8_t data1, uint8_t data2, enum DataType datatype, uint8_t sram_addr) {
uint16_t data = data2;
data <<= 8;
data |= data1;
char message[64];
if (datatype == FREQ_HIGH)
sprintf(message, "%d: %d.%03d MHz\r\n", sram_addr, data/1000, data % 1000);
else if (datatype == FREQ_LOW)
sprintf(message, "%d: %d.%01d Hz\r\n", sram_addr, data/10, data % 10);
else if (datatype == PERIOD_HIGH)
sprintf(message, "%d: %d.%02d ms\r\n", sram_addr, data/100, data % 100);
else if (datatype == PERIOD_LOW)
sprintf(message, "%d: %d.%02d s\r\n", sram_addr, data/100, data % 100);
else if (datatype == INTERVAL_HIGH)
sprintf(message, "%d: %d.%02d ms\r\n", sram_addr, data/100, data % 100);
else if (datatype == INTERVAL_LOW)
sprintf(message, "%d: %d.%02d s\r\n", sram_addr, data/100, data % 100);
else if (datatype == COUNT_HIGH)
sprintf(message, "%d: %d events in 10 ms\r\n", sram_addr, data);
else if (datatype == COUNT_LOW)
sprintf(message, "%d: %d events in 1 s\r\n", sram_addr, data);
else if (datatype == ANALYSIS)
sprintf(message, "%d: %d Hz \r\n", sram_addr, data);
else
sprintf(message, "%d: Unknown datatype\r\n", sram_addr);
sendString(message);
}
/*
Prints 16 bits of data from sram stored at currAddr.
*/
void printFromSRAM(uint8_t currAddr) {
uint8_t data1 = readSRAM(currAddr);
uint8_t data2 = readSRAM((currAddr + 1) % 32);
uint8_t sram_addr = currAddr/2;
enum DataType datatype = sramDataTypes[sram_addr];
printData(data1, data2, datatype, sram_addr);
}
// Prompts user for information on remote node, and then requests data from the node,
// printing it to uart output.
void remoteNode(uint8_t resolution) {
sendString("Slave addr? (0-5)\r\n");
char slave_read = (char)EUSART1_Read();
uint8_t slave_addr = 0;
if(slave_read <= '5' && slave_read >= '0') {
slave_addr = slave_read - '0';
}
sendString("Function?\r\n");
char function = (char) EUSART1_Read();
uint8_t sram_addr = 0;
enum DataType dataType = NONE;
switch(function) {
// Frequency
case 'f':
if(resolution) {
dataType = FREQ_HIGH;
} else {
dataType = FREQ_LOW;
}
break;
// Period
case 'p':
if(resolution) {
dataType = PERIOD_HIGH;
} else {
dataType = PERIOD_LOW;
}
break;
// Count
case 'c':
if(resolution) {
dataType = COUNT_HIGH;
} else {
dataType = COUNT_LOW;
}
break;
// Time Interval
case 'd':
if(resolution) {
dataType = INTERVAL_HIGH;
} else {
dataType = INTERVAL_LOW;
}
break;
// Analysis
case 'a':
dataType = ANALYSIS;
break;
// Prints from sram
case 's':
dataType = SRAM;
sendString("Addr? (0-9, a-f)");
char addr = (char)EUSART1_Read();
if(addr <= '9' && addr >= '0') {
sram_addr = addr - '0';
} else if(addr <= 'f' && addr >= 'a'){
sram_addr = addr - 'a' + 10;
} else {
sram_addr = 0;
}
break;
default :
sendString("Undefined command");
return;
}
struct SlaveResponse response = requestFromSlave(slave_addr, dataType, sram_addr);
printData(response.data1, response.data2, response.datatype, sram_addr);
}
/*
* Measure frequency through counting
*/
void measureFreq(int resolution, uint8_t currAddr) {
float count = 0;
uint16_t freq = 0;
char message[32];
if(resolution) {
// High frequency measurement
count = readCounter(HIGH_RES);
// Frequency in KHZ
freq = count/HIGH_RES;
sprintf(message, "%02d.%02d MHz\r\n", freq/1000, freq % 1000);
sramDataTypes[currAddr/2] = FREQ_HIGH;
} else {
// Low frequency measurement
count = readCounter(LOW_RES);
// Frequency in .1 Hz
freq = 10 * count;
sprintf(message, "%02d.%02d Hz\r\n", freq/10, freq % 10);
sramDataTypes[currAddr/2] = FREQ_LOW;
}
// Print on serial
sendString(message);
// Print to two places in SRAM
writeSRAM(currAddr, (uint8_t)(0xFF & freq));
writeSRAM((currAddr + 1) % 32, (uint8_t)(0xFF & (freq >> 8)));
/*
Write to LCD here
*/
}
/*
* Measure period of signal through counting
*/
void measurePeriod(int resolution, uint8_t currAddr) {
float count = 0;
uint16_t per = 0;
char message[32];
if(resolution) {
// small period measurement
count = readCounter(HIGH_RES);
// period in .01 ms
per = 100 * HIGH_RES / count;
sprintf(message, "%02d.%02d ms\r\n", per/100 , per % 100);
sramDataTypes[currAddr/2] = PERIOD_HIGH;
} else {
// large period measurement
count = readCounter(LOW_RES);
// Period in .01 s.
per = LOW_RES/count/10;
sprintf(message, "%02d.%02d s\r\n", per/100, per % 100);
sramDataTypes[currAddr/2] = PERIOD_LOW;
}
// Print on serial
sendString(message);
// Print to two places in SRAM
writeSRAM(currAddr, (uint8_t)(0xFF & per));
writeSRAM((currAddr + 1) % 32, (uint8_t)(0xFF & (per >> 8)));
/*
Write to LCD here
*/
}
void measureInterval(int resolution, uint8_t currAddr) {
uint16_t delay = 0;
char message[32];
uint16_t start_count;
switchBus(BUS_COUNTER_READ);
COUNTER_ENABLE_SetHigh();
// set an initial value
start_count = PORTB;
// wait for the first button press & reset the reference value
// wait a few seconds for the first button press
uint32_t first_delay = 0;
while (start_count == PORTB) {
__delay_us(1);
first_delay++;
if (first_delay >= 5000000) {
sendString("Signal timeout");
return;
}
}
start_count = PORTB;
if(resolution) {
while(start_count == PORTB && delay < 1000) {
__delay_us(10);
delay++;
}
sprintf(message, "time interval of %02d.%02d ms\r\n", delay / 100, delay % 100);
sramDataTypes[currAddr/2] = INTERVAL_HIGH;
} else {
while(start_count == PORTB && delay < 100) {
__delay_ms(10);
delay++;
}
sprintf(message, "time interval of %02d.%02d s\r\n", delay / 100, delay % 100);
sramDataTypes[currAddr/2] = INTERVAL_LOW;
}
COUNTER_ENABLE_SetLow();
// Print on serial
sendString(message);
// Print to two places in SRAM
writeSRAM(currAddr, (uint8_t)(0xFF & delay));
writeSRAM((currAddr + 1) % 32, (uint8_t)(0xFF & (delay >> 8)));
}
/*
* Measures a count of events over a period specified by resolution
*/
void measureCount(int resolution, uint8_t currAddr) {
uint16_t count = 0;
char message[32];
if(resolution) {
// short time measurement
count = 10*readCounter(HIGH_RES)/HIGH_RES;
sprintf(message, "%02d events in 10 ms\r\n", count);
sramDataTypes[currAddr/2] = COUNT_HIGH;
} else {
// long time measurement
count = readCounter(LOW_RES);
// Period in s.
sprintf(message, "%02d events in 1 s\r\n", count);
sramDataTypes[currAddr/2] = COUNT_LOW;
}
// Print on serial
sendString(message);
// Print to two places in SRAM
writeSRAM(currAddr, (uint8_t)(0xFF & count));
writeSRAM((currAddr + 1) % 32, (uint8_t)(0xFF & (count >> 8)));
}
/*
* Echos whatever is sent to the PIC
* Returns when enter is pressed
*/
void testUart()
{
while(1) {
char data;
data = EUSART1_Read();
EUSART1_Write(data);
if (data == '\n' || data == '\r') {
return;
}
}
}
/*
* Sends a string when t is pressed
* Returns when enter is pressed
*/
void testSendString()
{
char * testString = (char *) "\r\nThis is a test.\r\n";
char data;
while(1) {
data = EUSART1_Read();
if(data == 't') {
sendString(testString);
} else if (data == ('\n') || data == '\r') {
return;
}
}
}
/*
* Sends a number when t is pressed
* Returns when enter is pressed
*/
void testSendNum()
{
int testNum = -1337;
char data;
while(1) {
data = EUSART1_Read();
if(data == 't') {
sendInt(testNum);
} else if (data == ('\n') || data == '\r') {
return;
}
}
}
void testSRAM() {
TEST_LOOP(
uint8_t writedata = 0x2A; // 42
uint8_t readdata;
uint8_t addr = 0xA;
sendString("\r\nTesting SRAM...\r\n");
writeSRAM(addr, writedata);
readdata = readSRAM(addr);
sendString("At address: ");
sendInt(addr);
sendString("\r\nWrote: ");
sendInt(writedata);
sendString("\r\nRead: ");
sendInt(readdata);
if (writedata == readdata)
sendString("\r\nSRAM test successful :)");
else
sendString("\r\nSRAM test failed :(");
)
}
void testSPI() {
TEST_LOOP(
int8_t testval = 6;
int8_t retval;
sendString("Testing SPI...\r\n");
// send
retval = SPI1_Exchange8bit(testval);
// response
retval = SPI1_Exchange8bit(0);
if (retval != ~testval) {
sendString("SPI test failed :(\r\n");
sendString("Sent:");
sendInt(testval);
sendString(" Received:");
sendInt(retval);
sendString(" Expected:");
sendInt(~testval);
} else {
sendString("SPI test successful :)\r\n");
}
)
}