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#include "globals.h"
#include "i2c.h"
#include "device-functions.h"
#include "lcd.h"
#include "monitor.h"
#include "error_utils.h"
#include "menus.h"
#include <glib.h>
#include <math.h>
long monitor_last_forced_trig[max_channels];
void I2C_Setup_Monitor();
void I2C_Setup_Monitor()
{
int i;
float new_os;
float average_os;
float integrated_error;
int channel;
int total;
total=0;
average_os = 0.0;
for (channel=0; channel<(globals.Flash.ChanKey_Curr_Mon_value?globals.Flash.channels:1); ++channel)
if (globals.Flash.monitor_enabled[channel]) {
++total;
LCD_clear();
LCD_write(0,0,"Nulling Current Monitor ....");
/* quiescent */
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0xff);
I2C_Write(PCF8574A+Curr_Mon_LSB+channel*2,0xff);
/* remove chip-select */
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0xbf);
/* pulse CAL line low */
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0x9f);
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0xbf);
for(i=0; i<50; i++);
/* quiescent */
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0xff);
/* wait for monitor output to become stable */
g_usleep(1e6);
do {
globals.ChannelState[channel].Curr_Mon_offset=0;
integrated_error=0;
/* repeat until stable for 50 iterations */
int j=0;
while (j<50) {
g_usleep(1e4);
/* pulse S/H line low for initial sample of monitor */
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0x7f);
for (i=0; i<100; ++i) {
;
}
/* quiescent */
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0xff);
/* inactive, weak pull-up mode */
I2C_Read(PCF8574A+Curr_Mon_MSB+channel*2);
new_os = 1.0 * I2C_Get_Monitor_Word(channel);
average_os = (average_os*j+new_os) / (j+1.0);
integrated_error += (average_os-new_os);
if ( fabs(new_os-average_os) < 300.0) {
++j;
} else {
j=0;
}
}
} while (fabs(integrated_error) > 25.0);
globals.ChannelState[channel].Curr_Mon_offset=(int) average_os;
LCD_write(0,0,"Current Monitor is now ready.");
}
if (total) {
I2C_Check_Monitors();
}
return;
}
void force_monitor_cal(int channel, int do_calibration);
void force_monitor_cal(int channel, int do_calibration)
{
if (do_calibration) {
/* quiescent */
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0xff);
I2C_Write(PCF8574A+Curr_Mon_LSB+channel*2,0xff);
/* remove chip-select */
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0xbf);
/* pulse CAL line low */
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0x9f);
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0xbf);
g_usleep(2e3);
}
/* pulse trigger line low and remove chip-select to force an A/D conversion */
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0x3f);
/* quiescent */
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0xff);
}
int I2C_Get_Monitor_Word(int channel);
int I2C_Get_Monitor_Word(int channel)
{
int monitor_word;
/* remove chip-select, so that the value doesn't change while read */
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0xbf);
monitor_word=((I2C_Read(PCF8574A+Curr_Mon_MSB+channel*2) & 0x1f)<<8)
+ I2C_Read(PCF8574A+Curr_Mon_LSB+channel*2);
/* restore chip-select */
I2C_Write(PCF8574A+Curr_Mon_MSB+channel*2,0xff);
/* PCB 116B and earlier had 13-bit ADC, PCB 116C has 12 bit. */
if (globals.Flash.pcb116c_mon == 1) {
monitor_word = (monitor_word & 0x0fff) << 1;
}
/* deal with sign bit */
if (monitor_word & 0x1000) {
monitor_word=-( ((~monitor_word)+1) & 0x0fff);
}
monitor_word*=-1;
monitor_word-=globals.ChannelState[channel].Curr_Mon_offset;
return monitor_word;
}
int I2C_Check_Monitors(void)
{
int monitor_word;
float new_val, avg_val, step_size, max_dev_in_steps;
int channel;
int ampl_range,point_found,UseNegData,entry,word_out,atten_range;
int update_display;
int use_neg_data;
int actual_pol;
int i;
int error_num;
long timer_check;
long seconds_since_last;
update_display=0;
for (channel=0; channel<(globals.Flash.ChanKey_Curr_Mon_value?globals.Flash.channels:1); ++channel) {
timer_check = sec_timer();
seconds_since_last = timer_check - monitor_last_forced_trig[channel];
if (seconds_since_last > 0) {
if ( (globals.ChannelState[channel].func_mode==dc_mode_on)
|| (globals.ChannelState[channel].output_state==output_off)) {
/* force monitor measurement every second in DC mode (because no TTL
trigger is present) and output-off mode */
force_monitor_cal(channel,NO);
}
monitor_last_forced_trig[channel]=timer_check;
}
if (globals.Flash.sep_posneg_mon_ratio[channel] && globals.ChannelState[channel].amplitude<0.0) {
use_neg_data=1;
} else {
use_neg_data=0;
}
monitor_word=I2C_Get_Monitor_Word(channel);
/* determine current ampl_range */
Set_VI_Control(pwl_ampl_values,channel,globals.ChannelState[channel].amplitude,&point_found,
&l_range,&atten_range,&UseNegData,&entry,&word_out,&actual_pol,NULL);
/* 5.0V is the full-scale voltage of the 12bit ADC */
new_val = ((((float) monitor_word)/4095.0) * 5.0)
/ globals.Flash.mon_vi_ratio[channel][ampl_range][use_neg_data];
/* averaging */
for (i=CURR_MON_MAX_OLD_COUNTS-1;i>0;i--) {
globals.ChannelState[channel].old_mon_vals[i]=globals.ChannelState[channel].old_mon_vals[i-1];
}
globals.ChannelState[channel].old_mon_vals[0] = new_val;
if (globals.ChannelState[channel].num_mon_vals<CURR_MON_MAX_OLD_COUNTS) {
++globals.ChannelState[channel].num_mon_vals;
}
avg_val = 0.0;
for (i=0;i<globals.ChannelState[channel].num_mon_vals;i++) {
avg_val += globals.ChannelState[channel].old_mon_vals[i] / globals.ChannelState[channel].num_mon_vals;
}
step_size=globals.Flash.monitor_step[channel];
/* reset average if change is bigger than DEFAULT_MAX_STEP_DEV_FROM_AVG steps */
max_dev_in_steps = MAX(globals.Flash.max_mon_steps_before_reset_average[channel], DEFAULT_MAX_STEP_DEV_FROM_AVG);
if (fabs((new_val-avg_val)/step_size) > max_dev_in_steps) {
globals.ChannelState[channel].num_mon_vals = 1;
avg_val = new_val;
}
/* convert to even step size */
globals.ChannelState[channel].Curr_Mon_value= ((float) ((long) (avg_val/step_size)) ) * step_size;
/* AVO-8D2: check for duty cycle problems, as a function of measured amplitude */
if ( globals.Flash.hard_current_limit_enabled[channel] &&
(globals.ChannelState[channel].output_state == output_on)) {
for (i=0; i<max_channels; ++i) {
TestState[i]=globals.ChannelState[i];
}
TestState[channel].amplitude=globals.ChannelState[channel].Curr_Mon_value;
if ((error_num=Error_check(TestState))) {
Set_Output_State(channel,output_off);
queue_and_broadcast_sensor_alarm(error_num);
}
}
if (globals.Flash.soft_current_limit_enabled[channel] &&
(globals.Flash.fully_programmed != Being_Programmed) &&
(globals.ChannelState[channel].Curr_Mon_value > globals.ChannelState[channel].soft_current_limit)) {
Set_Output_State(channel,output_off);
queue_and_broadcast_sensor_alarm(Soft_Limit_Exceeded);
} else if (globals.MenuStatus.Type_Of_Menu==Main_Menu_On &&
!globals.MenuStatus.Error_Screen &&
!globals.MenuStatus.Nonstd_Display &&
globals.ChannelState[channel].Curr_Mon_value!=globals.ChannelState[channel].displayed_mon_val)
{
++update_display;
}
}
if (update_display) {
Show_Main_Menu();
}
return OK;
}
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