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117
main.c
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@ -1,67 +1,108 @@
/*!
* @file main.c
* @authors Simon Donnet-Monay & Remi Heredero
* @date 14 march 2023
* @brief Main is in two part.
* First for setup everything
* Second for loop on measure and set duty cycle for PWM
*/
/**
Generated Main Source File
Company:
Microchip Technology Inc.
File Name:
main.c
Summary:
This is the main file generated using PIC10 / PIC12 / PIC16 / PIC18 MCUs
Description:
This header file provides implementations for driver APIs for all modules selected in the GUI.
Generation Information :
Product Revision : PIC10 / PIC12 / PIC16 / PIC18 MCUs - 1.81.8
Device : PIC18F97J60
Driver Version : 2.00
*/
/*
(c) 2018 Microchip Technology Inc. and its subsidiaries.
Subject to your compliance with these terms, you may use Microchip software and any
derivatives exclusively with Microchip products. It is your responsibility to comply with third party
license terms applicable to your use of third party software (including open source software) that
may accompany Microchip software.
THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, WHETHER
EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, INCLUDING ANY
IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, AND FITNESS
FOR A PARTICULAR PURPOSE.
IN NO EVENT WILL MICROCHIP BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE,
INCIDENTAL OR CONSEQUENTIAL LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND
WHATSOEVER RELATED TO THE SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP
HAS BEEN ADVISED OF THE POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO
THE FULLEST EXTENT ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL
CLAIMS IN ANY WAY RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT
OF FEES, IF ANY, THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS
SOFTWARE.
*/
#include "mcc_generated_files/mcc.h"
#include "lcd/lcd.h"
#include "measure.h"
#include "modbus.h"
#define MAX_COL 16 //!< columns for lcd screen (and 2 rows)
#define MAX_COL 16
/*
Main application
*/
void main(void) {
/* SETUP FUNCTIONS: */
// Initialize the system with all mcc default configs
extern uint16_t input_registers[2];
void main(void)
{
// Initialize the device
SYSTEM_Initialize();
EPWM1_LoadDutyValue(0);
Lcd_Init(); // Initialize lcd screen
adc_init(); // Initialize adc for measures
modbus_init(0x80); // Initialize all specific modbus function
Lcd_Init();
adc_init();
modbus_init(0x80);
uint16_t offsetCurrent = 0;
offsetCurrent = measure_current(offsetCurrent);
// If using interrupts in PIC18 High/Low Priority Mode you need to enable the Global High and Low Interrupts
// If using interrupts in PIC Mid-Range Compatibility Mode you need to enable the Global and Peripheral Interrupts
// Use the following macros to:
// Enable the Global Interrupts
INTERRUPT_GlobalInterruptEnable();
// Disable the Global Interrupts
//INTERRUPT_GlobalInterruptDisable();
// Enable the Peripheral Interrupts
INTERRUPT_PeripheralInterruptEnable();
/*
* Initialize offset current.
* 1. disable load
* 2. Measure current without load
*
* The goal it's to remove the offset due to the electronics parts
*/
EPWM1_LoadDutyValue(0);
const uint16_t offsetCurrent = measure_current(offsetCurrent);
// Disable the Peripheral Interrupts
//INTERRUPT_PeripheralInterruptDisable();
// create a char array for display on lcd (with space for '\0')
char msg[MAX_COL+1];
/* LOOP MAIN PROGRAM: */
while (1)
{
while (1) {
// Get the measure and save it and the appropriate register
EPWM1_LoadDutyValue(holding_registers[0]);
input_registers[0] = measure_voltage();
input_registers[1] = measure_current(offsetCurrent);
uint16_t valueV = input_registers[0];
uint16_t valueI = input_registers[1];
// Print on the first row of the lcd the Voltage
sprintf(msg, "U = %04d [mV] ", input_registers[0]);
char msg[MAX_COL+1];
//LCD_2x16_WriteCmd(0x01); // clear display
sprintf(msg, "U = %04d [mV] ", valueV);
LCD_2x16_WriteMsg(msg,0);
// Print on the second row of the lcd the current
sprintf(msg, "I = %04d [uA] ", input_registers[1]);
sprintf(msg, "I = %04d [uA] ", valueI);
LCD_2x16_WriteMsg(msg,1);
// Write the duty cycle for pwm from the appropriate register
EPWM1_LoadDutyValue(holding_registers[0]);
}
}
/**
End of File
*/

73
measure.c
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@ -13,58 +13,55 @@
// Number of samples to do the averaging during measures
#define AVERAGE_SAMPLES 8
void adc_init(void) {
void adc_init(void)
{
// TODO -> complete adc initialisation
//offsetCurrent = measure_current(0);
}
/**
* Read one ADC channel. This function is only
* local to this file.
* This function make the average on samples
*
* @param channel : the channel to be measured
* @return the ADC read value with an average
* @return the ADC read value
*/
static uint16_t measure_adc(uint8_t channel) {
uint32_t value = 0;
static uint16_t measure_adc(uint8_t channel)
{
return (uint16_t) (ADC_GetConversion(channel));
}
uint16_t measure_voltage()
{
uint32_t sum = 0;
// Make an average
for(int i = 0; i < AVERAGE_SAMPLES; i++) {
value += (uint16_t) (ADC_GetConversion(channel));
sum += measure_adc(VOLTAGE_CHANNEL);
}
value /= AVERAGE_SAMPLES;
return (uint16_t) (value);
sum /= AVERAGE_SAMPLES;
sum = (sum * ADC_REFH) / ADC_RESOLUTION;
return (uint16_t)(sum);
}
uint16_t measure_current(uint16_t offset)
{
uint32_t sum = 0;
for(int i = 0; i< AVERAGE_SAMPLES; i++){
sum += measure_adc(CURRENT_CHANNEL);
}
uint32_t m = (sum / AVERAGE_SAMPLES); // m is bits
m = (m * ADC_REFH) / ADC_RESOLUTION; // m is mV
m *= 1000; // m is uV
m /= GAIN;
m /= RESISTOR; // m is uA
if(m <= offset){
m = 0;
} else {
m -= offset;
}
/**
* Measure voltage
* @return
*/
uint16_t measure_voltage() {
uint32_t value = measure_adc(VOLTAGE_CHANNEL);
// Convert sum from bits to mV
value = (value * ADC_REFH) / ADC_RESOLUTION;
return (uint16_t)(value);
}
/**
*
* @param offset
* @return
*/
uint16_t measure_current(uint16_t offset) {
uint32_t value = measure_adc(CURRENT_CHANNEL);
// Convert from bits to uA
value = (value * ADC_REFH) / ADC_RESOLUTION; // [mV]
value *= 1000; // [uV]
value /= GAIN; // [uV]
value /= RESISTOR; // [uA]
// Return value without offset or null if it's too low
if(value > offset) return (uint16_t)(value-offset);
return 0;
return (uint16_t)m;
}

133
modbus.c
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@ -1,17 +1,14 @@
/*!
* @file modbus.c
* @authors Simon Donnet-Monay & Remi Heredero
* @date 14 march 2023
* @brief
*/
#include "modbus.h"
#include "crc.h"
#include "uart.h"
#include <xc.h>
#include <stdint.h>
#include <stdio.h>
// Modbus functions
#define READ_INPUT_REGISTERS 0x04 // Modbus function for read input register
#define READ_HOLDING_REGISTERS 0x03 // Modbus function for read holding register
#define WRITE_SINGLE_REGISTER 0x06 // Modbus function for write a single register
#define READ_INPUT_REGISTERS 0x04
#define READ_HOLDING_REGISTERS 0x03
#define WRITE_SINGLE_REGISTER 0x06
// Modbus data model
uint8_t modbusAddress;
@ -35,83 +32,47 @@ uint8_t tx_buf[256];
// Current position pointer for storing receive position
uint8_t recPtr = 0;
/**
* End of MODBUS frame.
*/
void modbus_timer(void) {
INTCONbits.TMR0IF = 0; // Reset flag of the timer0 interrupt
recPtr = 0; // Reset position of the char in the frame
TMR0_StopTimer(); // Stop timer who detect the end of the frame
modbus_analyse_and_answer(); // Run analyse of this frame
void modbus_timer(void)
{
INTCONbits.TMR0IF = 0;
recPtr = 0;
TMR0_StopTimer();
modbus_analyse_and_answer();
}
extern uint16_t measure_voltage();
/**
* @brief Analyse the received frame and build an answer
* @return The error code if the frame isn't valid (TODO)
*/
uint8_t modbus_analyse_and_answer(void) {
// Init lenght of the answer frame at 0
// TODO -> complete the modbus analyse and answer
uint16_t length = 0;
// Check if the received frame is for this device
if(rx_buf[0] == modbusAddress){
tx_buf[0] = rx_buf[0]; // Copy the address on the tx buffer
tx_buf[1] = rx_buf[1]; // Copy the function number on the tx buffer
// Init the addresse Register local variable
tx_buf[0] = rx_buf[0]; // Adress
tx_buf[1] = rx_buf[1]; // Function
uint16_t adresseRegister = ((uint16_t)rx_buf[2] << 8) | rx_buf[3];
switch(rx_buf[1]){ // Check the function from rx buffer
// In case of the function is to read input register:
case READ_INPUT_REGISTERS:
// Define length as the number of register we want read
length = ((uint16_t)rx_buf[4] << 8) | rx_buf[5];
// Write this length on the tx buffer for the answer
tx_buf[2] = (uint8_t)(length*2);
// For each register, write the value on the tx buffer (register on 16bits)
tx_buf[2] = (uint8_t)(length*2); // Data length
for(uint16_t i = 0; i < length; i++){ // Data
tx_buf[i*2+4] = input_registers[adresseRegister+i];
tx_buf[i*2+3] = (input_registers[adresseRegister+i] >> 8);
}
// Transform length as the number of bytes on tx register
length*=2; // 2 bytes by register
length+=3; // + address + function + length
length*=2;
length+=3;
break;
// In case of the function is to read holding register
case READ_HOLDING_REGISTERS:
// Define length as the number of register we want read
length = ((uint16_t)rx_buf[4] << 8) | rx_buf[5];
// Write this length on the tx buffer for the answer
tx_buf[2] = (uint8_t)(length*2);
// For each register, write the value on the tx buffer (register on 16bits))
for(uint16_t i = 0; i < length; i++){
tx_buf[2] = (uint8_t)(length*2); // Data length
for(uint16_t i = 0; i < length; i++){ // Data
tx_buf[i*2+4] = holding_registers[adresseRegister+i];
tx_buf[i*2+3] = (holding_registers[adresseRegister+i] >> 8);
}
// Transform length as the number of bytes on tx register
length*=2; // 2 bytes by register
length+=3; // + address + function + length
length*=2;
length+=3;
break;
// In case of the funciton is to write a single register
case WRITE_SINGLE_REGISTER:
// Write the value on rx buffer on the holding register define by the adress register we define before
holding_registers[adresseRegister] = ((uint16_t)rx_buf[4] << 8) | rx_buf[5];
// Copy data on the tx buffer
for (uint8_t i = 2; i <= 5; i++) {
for (int i = 2; i <= 5; i++) {
tx_buf[i] = rx_buf[i];
length = i+1;
}
@ -120,62 +81,38 @@ uint8_t modbus_analyse_and_answer(void) {
}
// Clear address on rx buffer (for validate we treat the data)
rx_buf[0] = 0;
// Send the answer frame
modbus_send(length);
// TODO return error code
}
/**
* Record a char when it's received on the modbus
*/
void modbus_char_recvd(void) {
//! Record the received char on the rx buffer and move position of the record pointer for the next char
void modbus_char_recvd(void)
{
rx_buf[recPtr++] = RCREG1;
//! Reload and start the timer0 for restart to count the time between char
TMR0_Reload();
TMR0_StartTimer();
}
/**
* Create the CRC and send the tx buffer
* @param length lenght of the frame without the CRC
*/
void modbus_send(uint8_t length) {
// Create the CRC
void modbus_send(uint8_t length)
{
uint16_t crc = CRC16(tx_buf, length);
// Write CRC on the tx buffer
tx_buf[length] = crc;
tx_buf[length+1] = crc >> 8;
length += 2; //! add 2 CRC bytes for total size
length += 2; // add 2 CRC bytes for total size
// Send each byte of the frame on the tx buffer
// For all the bytes to be transmitted
for (uint8_t i = 0; i < length; i++){
EUSART1_Write(tx_buf[i]);
}
}
/**
* Initialize the modbus with adress and handler function
* @param address The adress of this device on modbus protocole
*/
void modbus_init(uint8_t address) {
// Init the modbus adress
modbusAddress = address;
// Save the modbus adress in the dedicated register
void modbus_init(uint8_t address)
{
modbusAddress = address;
holding_registers[1] = address;
// Set the handler for the character detection
EUSART1_SetRxInterruptHandler(modbus_char_recvd);
// Set the handler for the detection of end frame
TMR0_SetInterruptHandler(modbus_timer);
}

2
modbus.h
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@ -7,8 +7,6 @@
#define MODBUS_H
#include <stdint.h>
#include <xc.h>
#include <stdio.h>
extern uint8_t modbusAddress;
extern uint16_t input_registers[2];

16
nbproject/Makefile-genesis.properties
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@ -1,8 +1,14 @@
#
#Sat Mar 18 16:03:57 CET 2023
proj.dir=C\:\\Users\\remi\\MPLABXProjects\\Solar-Panel
host.id=aq84-7qg1-w
#Tue Mar 14 13:52:25 CET 2023
default.languagetoolchain.version=2.40
default.Pack.dfplocation=C\:\\Program Files\\Microchip\\MPLABX\\v6.00\\packs\\Microchip\\PIC18F-J_DFP\\1.5.44
conf.ids=default
default.languagetoolchain.dir=C\:\\Program Files\\Microchip\\xc8\\v2.40\\bin
host.id=3awj-afwq-rl
configurations-xml=4dc45b219db50423420a0eb2e1f688ad
com-microchip-mplab-nbide-embedded-makeproject-MakeProject.md5=bcd6e5453a11ce86aaffd5305e838602
default.com-microchip-mplab-mdbcore-snap-SnapToolImpl.md5=eaa336cefb7fc46db8b50b7b2b6e54ca
com-microchip-mplab-nbide-embedded-makeproject-MakeProject.md5=6e02ca5e9f5042ffd365b42ab82d3a9b
user-defined-mime-resolver-xml=none
default.com-microchip-mplab-nbide-toolchain-xc8-XC8LanguageToolchain.md5=ab1e0737b447a24f7366e9fd8fe5a2f0
proj.dir=C\:\\Users\\remi\\MPLABXProjects\\solar_panel
host.platform=windows
conf.ids=

2
nbproject/Makefile-impl.mk
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@ -24,7 +24,7 @@ CLEAN_SUBPROJECTS=${CLEAN_SUBPROJECTS_${SUBPROJECTS}}
# Project Name
PROJECTNAME=Solar-Panel
PROJECTNAME=solar_panel
# Active Configuration
DEFAULTCONF=default

4
nbproject/Makefile-variables.mk
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@ -6,5 +6,5 @@
CND_BASEDIR=`pwd`
# default configuration
CND_ARTIFACT_DIR_default=dist/default/production
CND_ARTIFACT_NAME_default=Solar-Panel.production.hex
CND_ARTIFACT_PATH_default=dist/default/production/Solar-Panel.production.hex
CND_ARTIFACT_NAME_default=solar_panel.production.hex
CND_ARTIFACT_PATH_default=dist/default/production/solar_panel.production.hex

9
nbproject/private/private.xml
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@ -3,7 +3,14 @@
<editor-bookmarks xmlns="http://www.netbeans.org/ns/editor-bookmarks/2" lastBookmarkId="0"/>
<open-files xmlns="http://www.netbeans.org/ns/projectui-open-files/2">
<group>
<file>file:/C:/Users/remi/MPLABXProjects/Solar-Panel/measure.c</file>
<file>file:/C:/Program%20Files/Microchip/xc8/v2.40/pic/sources/c99/common/doprnt.c</file>
<file>file:/C:/Users/remi/MPLABXProjects/solar_panel/lcd/lcd.c</file>
<file>file:/C:/Users/remi/MPLABXProjects/solar_panel/modbus.h</file>
<file>file:/C:/Users/remi/MPLABXProjects/solar_panel/main.c</file>
<file>file:/C:/Program%20Files/Microchip/xc8/v2.40/pic/sources/c99/common/aomod.c</file>
<file>file:/C:/Users/remi/MPLABXProjects/solar_panel/modbus.c</file>
<file>file:/C:/Users/remi/MPLABXProjects/solar_panel/crc.c</file>
<file>file:/C:/Users/remi/MPLABXProjects/solar_panel/mcc_generated_files/tmr0.c</file>
</group>
</open-files>
</project-private>

55
old_main.c Normal file
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@ -0,0 +1,55 @@
/************************************************************************//**
* \file main.c
* \brief Program main file for MODBUS controller
***************************************************************************/
#include <xc.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include "lcd/lcd.h"
#include "pwm.h"
#include "measure.h"
#include "modbus.h"
#include "uart.h"
#define _XTAL_FREQ 64000000L
/**
* Initialize clock, buttons, leds and interrupts
*/
void init_hw()
{
OSCCON3 = 0; // runs at 64MHz
LCD_Init(LCD_2x16);
adc_init();
modbus_init(0x80);
pwm_init();
uart_init();
// Interrupts configuration
PEIE = 1;
GIE = 1;
}
uint8_t tmpStr[30];
uint16_t u; ///< Voltage in milliovolts
uint16_t i; ///< Current in microamperes
uint16_t p; ///< Power in microwatts
uint16_t offset;
uint16_t pwm = 512;
void main(void)
{
init_hw();
LCD_2x16_WriteMsg((unsigned char *)"Welcome ! ", 0); // display on line 0
LCD_2x16_WriteMsg((unsigned char *)"*-*-*-*-*-*-*-*-", 1); // display on line 1
// TODO -> complete measure of current offset
while (true) {
// TODO -> complete the main loop
}
}

4
solar_panel.mc3
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@ -352,7 +352,7 @@
</entry>
<entry>
<key class="com.microchip.mcc.core.tokenManager.RegisterKey" moduleName="ADC" registerAlias="ADCON2"/>
<value>0</value>
<value>128</value>
</entry>
<entry>
<key class="com.microchip.mcc.core.tokenManager.RegisterKey" moduleName="ADC" registerAlias="ADRESH"/>
@ -396,7 +396,7 @@
</entry>
<entry>
<key class="com.microchip.mcc.core.tokenManager.SettingKey" moduleName="ADC" registerAlias="ADCON2" settingAlias="ADFM"/>
<value>left</value>
<value>right</value>
</entry>
<entry>
<key class="com.microchip.mcc.core.tokenManager.SettingKey" moduleName="ADC" registerAlias="ADI" settingAlias="enable"/>

7
uart.c Normal file
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@ -0,0 +1,7 @@
#include "uart.h"
void uart_send(uint8_t *tx_buf, uint8_t length){
for (uint8_t i = 0; i < length; i++){
EUSART1_Write(tx_buf[i]);
}
}

18
uart.h Normal file
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@ -0,0 +1,18 @@
/*
* File: uart.h
* Author: remi
*
* Created on March 3, 2023, 3:23 PM
*/
#ifndef UART_H
#define UART_H
#include "mcc_generated_files/mcc.h"
void uart_send(uint8_t *tx_buf, uint8_t length);
#endif /* UART_H */