Paparazzi UAS  v5.0.5_stable-7-g4b8bbb7
Paparazzi is a free software Unmanned Aircraft System.
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MPPT.c
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1 /*
2  * Copyright (C) 2009 ENAC, Pascal Brisset, Michel Gorraz
3  *
4  * This file is part of paparazzi.
5  *
6  * paparazzi is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2, or (at your option)
9  * any later version.
10  *
11  * paparazzi is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with paparazzi; see the file COPYING. If not, write to
18  * the Free Software Foundation, 59 Temple Place - Suite 330,
19  * Boston, MA 02111-1307, USA.
20  *
21  */
22 
29 #include <stdbool.h>
30 #include "MPPT.h"
32 #include "mcu_periph/i2c.h"
33 
34 
35 #define MPPT_SLAVE_ADDR 0x40
36 #define NB_I2C_DATA 8
37 #define MPPT_MODE_ADDR 0xf
38 
40 
56 #ifndef DOWNLINK_DEVICE
57 #define DOWNLINK_DEVICE DOWNLINK_AP_DEVICE
58 #endif
59 #include "mcu_periph/uart.h"
60 #include "messages.h"
62 
67 #define MPPT_STATUS_IDLE 0
68 #define MPPT_STATUS_WRITING 1
69 #define MPPT_STATUS_ASKING 2
70 #define MPPT_STATUS_READING 3
71 
72 
73 static uint8_t data_index = 0xff;
75 
76 void MPPT_init( void ) {
77  MPPT_mode = 0;
79 }
80 
81 
82 static void MPPT_ask( void ) {
83  data_index++;
84  if (data_index >= NB_I2C_DATA) {
85  /* Setting the current value */
86  fbw_current_milliamp = MPPT_data[MPPT_IBAT_INDEX];
87 
89  DOWNLINK_SEND_MPPT(DefaultChannel, DefaultDevice, NB_DATA, MPPT_data);
90  data_index = 0;
91  }
92 
96 }
97 
98 void MPPT_periodic( void ) {
99 
101  switch (MPPT_status) {
102  case MPPT_STATUS_IDLE:
103  /* If free, change mode if needed */
104  if (MPPT_mode) {
106  mppt_trans.buf[1] = 0;
107  mppt_trans.buf[2] = MPPT_mode;
109  MPPT_mode = 0;
111  } else {
112  MPPT_ask();
113  }
114  break;
115 
116  case MPPT_STATUS_WRITING:
118  break;
119 
120  case MPPT_STATUS_ASKING:
121  /* The slave should send 2 bytes */
124  break;
125 
126  case MPPT_STATUS_READING:
127  /* We got 2 bytes */
128  if (data_index < NB_I2C_DATA)
131  break;
132  }
133  }
134 }
FBW ( FlyByWire ) process API.
#define MPPT_MODE_ADDR
Definition: MPPT.c:37
arch independent UART (Universal Asynchronous Receiver/Transmitter) API
void MPPT_periodic(void)
Definition: MPPT.c:98
#define MPPT_ITOTAL_INDEX
Definition: MPPT.h:41
static int16_t MPPT_data[NB_DATA]
Definition: MPPT.c:74
#define MPPT_STATUS_ASKING
Definition: MPPT.c:69
#define NB_I2C_DATA
Definition: MPPT.c:36
#define MPPT_IBAT_INDEX
Definition: MPPT.h:39
uint8_t MPPT_mode
Definition: MPPT.c:63
#define MPPT_ICONV_INDEX
Definition: MPPT.h:40
bool_t i2c_transmit(struct i2c_periph *p, struct i2c_transaction *t, uint8_t s_addr, uint8_t len)
Definition: i2c.c:85
static void MPPT_ask(void)
Definition: MPPT.c:82
signed short int16_t
Definition: types.h:17
enum I2CTransactionStatus status
Definition: i2c.h:83
#define MPPT_SLAVE_ADDR
Definition: MPPT.c:35
volatile uint8_t buf[I2C_BUF_LEN]
Definition: i2c.h:82
Solar cells MPTT monitoring.
unsigned char uint8_t
Definition: types.h:14
struct i2c_transaction mppt_trans
Definition: MPPT.c:39
#define NB_DATA
Definition: generic_com.c:38
void MPPT_init(void)
Definition: MPPT.c:76
#define MPPT_STATUS_READING
Definition: MPPT.c:70
#define MPPT_STATUS_WRITING
Definition: MPPT.c:68
static uint8_t MPPT_status
A value different from 0 is a request from this mode.
Definition: MPPT.c:66
#define MPPT_STATUS_IDLE
Definition: MPPT.c:67
bool_t i2c_receive(struct i2c_periph *p, struct i2c_transaction *t, uint8_t s_addr, uint16_t len)
Definition: i2c.c:95
static uint8_t data_index
Definition: MPPT.c:73
Architecture independent I2C (Inter-Integrated Circuit Bus) API.