mirror of
https://github.com/paparazzi/paparazzi.git
synced 2026-06-05 15:30:08 +08:00
Gautier Hattenberger
132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
/*
|
|
* Copyright (C) 2009 ENAC, Pascal Brisset, Michel Gorraz
|
|
*
|
|
* This file is part of paparazzi.
|
|
*
|
|
* paparazzi is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* paparazzi is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with paparazzi; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* @file modules/MPPT/MPPT.c
|
|
* @brief Solar cells MPTT monitoring
|
|
*
|
|
*/
|
|
|
|
#include <stdbool.h>
|
|
#include "MPPT.h"
|
|
#include "firmwares/fixedwing/main_fbw.h"
|
|
#include "mcu_periph/i2c.h"
|
|
|
|
|
|
#define MPPT_SLAVE_ADDR 0x40
|
|
#define NB_I2C_DATA 8
|
|
#define MPPT_MODE_ADDR 0xf
|
|
|
|
struct i2c_transaction mppt_trans;
|
|
|
|
/**
|
|
0: VBat (mV)
|
|
1: IBat (mA)
|
|
2: PBat (mW)
|
|
3: VSol (mV)
|
|
4: ISol (mA)
|
|
5: PSol (mW)
|
|
6: IConv (mA)
|
|
7: PConv (mW)
|
|
|
|
9: IBat + IConv
|
|
*/
|
|
|
|
|
|
|
|
#include "mcu_periph/uart.h"
|
|
#include "messages.h"
|
|
#include "subsystems/datalink/downlink.h"
|
|
|
|
uint8_t MPPT_mode;
|
|
/** A value different from 0 is a request from this mode */
|
|
|
|
static uint8_t MPPT_status;
|
|
#define MPPT_STATUS_IDLE 0
|
|
#define MPPT_STATUS_WRITING 1
|
|
#define MPPT_STATUS_ASKING 2
|
|
#define MPPT_STATUS_READING 3
|
|
|
|
|
|
static uint8_t data_index = 0xff;
|
|
static int16_t MPPT_data[NB_DATA];
|
|
|
|
void MPPT_init( void ) {
|
|
MPPT_mode = 0;
|
|
MPPT_status = MPPT_STATUS_IDLE;
|
|
}
|
|
|
|
|
|
static void MPPT_ask( void ) {
|
|
data_index++;
|
|
if (data_index >= NB_I2C_DATA) {
|
|
/* Setting the current value */
|
|
fbw_current_milliamp = MPPT_data[MPPT_IBAT_INDEX];
|
|
|
|
MPPT_data[MPPT_ITOTAL_INDEX] = MPPT_data[MPPT_IBAT_INDEX] + MPPT_data[MPPT_ICONV_INDEX];
|
|
DOWNLINK_SEND_MPPT(DefaultChannel, DefaultDevice, NB_DATA, MPPT_data);
|
|
data_index = 0;
|
|
}
|
|
|
|
mppt_trans.buf[0] = data_index;
|
|
i2c_transmit(&i2c0, &mppt_trans, MPPT_SLAVE_ADDR, 1);
|
|
MPPT_status = MPPT_STATUS_ASKING;
|
|
}
|
|
|
|
void MPPT_periodic( void ) {
|
|
|
|
if (mppt_trans.status == I2CTransSuccess) {
|
|
switch (MPPT_status) {
|
|
case MPPT_STATUS_IDLE:
|
|
/* If free, change mode if needed */
|
|
if (MPPT_mode) {
|
|
mppt_trans.buf[0] = MPPT_MODE_ADDR;
|
|
mppt_trans.buf[1] = 0;
|
|
mppt_trans.buf[2] = MPPT_mode;
|
|
i2c_transmit(&i2c0, &mppt_trans, MPPT_SLAVE_ADDR, 3);
|
|
MPPT_mode = 0;
|
|
MPPT_status = MPPT_STATUS_WRITING;
|
|
} else {
|
|
MPPT_ask();
|
|
}
|
|
break;
|
|
|
|
case MPPT_STATUS_WRITING:
|
|
MPPT_status = MPPT_STATUS_IDLE;
|
|
break;
|
|
|
|
case MPPT_STATUS_ASKING:
|
|
/* The slave should send 2 bytes */
|
|
i2c_receive(&i2c0, &mppt_trans, MPPT_SLAVE_ADDR, 2);
|
|
MPPT_status = MPPT_STATUS_READING;
|
|
break;
|
|
|
|
case MPPT_STATUS_READING:
|
|
/* We got 2 bytes */
|
|
if (data_index < NB_I2C_DATA)
|
|
MPPT_data[data_index] = (mppt_trans.buf[0]<<8) | mppt_trans.buf[1];
|
|
MPPT_status = MPPT_STATUS_IDLE;
|
|
break;
|
|
}
|
|
}
|
|
}
|