void reset_hardware_trip()
{
if (!trip_disable) {
write_adc(REG_IOCONTROL, (1 << 4)); // P1DIR=1,P1DAT=0
write_adc(REG_IOCONTROL, (1 << 4) | (1 << 0)); // P1DIR=1,P1DAT=1
}
}
unsigned char adc_read(unsigned char channel, float *value)
{
unsigned long xdata d, start_time;
unsigned char xdata i;
/* start conversion */
channel = adc_index[channel % (N_HV_CHN*2)];
write_adc(REG_CONTROL, channel << 4 | 0x0F); // adc_chn, +2.56V range
write_adc(REG_MODE, (1<<4) | (1<<1)); // single conversion, 10 channel mode
start_time = time();
while (ADC_NRDY) {
yield();
for (i=0 ; i<N_HV_CHN ; i++)
ramp_hv(i); // do ramping while reading ADC
/* abort if no ADC ready after 300ms */
if (time() - start_time > 30) {
reset_adc();
return 0;
}
}
read_adc24(REG_ADCDATA, &d);
/* convert to volts */
*value = ((float)d / (1l<<24)) * 2.56;
/* round result to 6 digits */
*value = floor(*value*1E6+0.5)/1E6;
return 1;
}
void reset_adc()
{
ADC_NRES = 0;
delay_us(OPT_DELAY);
ADC_NRES = 1;
delay_us(OPT_DELAY);
write_adc(REG_FILTER, ADC_SF_VALUE);
#ifndef HARDWARE_TRIP
/* disable hardware trip FF's */
write_adc(REG_IOCONTROL, (1 << 4));
#endif
}
void adc_read()
{
unsigned char i;
unsigned long value;
float gvalue;
if (ADC_NRDY)
return;
read_adc24(REG_ADCDATA, &value);
/* convert to volts */
gvalue = ((float)value / (1l<<24)) * 2.56;
/* round result to 5 digits */
gvalue = floor(gvalue*1E5+0.5)/1E5;
/* apply range */
if (user_data.adc_25 == 0) {
if (user_data.uni_adc)
gvalue *= 10.0/2.56;
else
gvalue = gvalue/2.56*20.0 - 10;
}
DISABLE_INTERRUPTS;
user_data.adc[adc_chn] = gvalue;
ENABLE_INTERRUPTS;
/* start next conversion */
adc_chn = (adc_chn + 1) % 8;
i = adc_index[adc_chn];
write_adc(REG_CONTROL, i << 4 | 0x0F); // adc_chn, +2.56V range
}
void set_current_limit(float value)
{
#ifdef HARDWARE_TRIP
unsigned short d;
if (value == 9999) {
/* disable current trip */
d = 65535;
trip_disable = 1;
write_adc(REG_IOCONTROL, (1 << 4)); // P1DIR=1,P1DAT=0
} else {
/* remove reset */
trip_disable = 0;
write_adc(REG_IOCONTROL, (1 << 4) | (1 << 0)); // P1DIR=1,P1DAT=1
/* "inverse" calibration */
value /= user_data[0].cur_gain;
value += user_data[0].cur_offset;
/* omit cur_vgain calibration, because statistical mean of
unbalanced dividers is zero */
if (value < 0)
value = 0;
/* convert current to voltage */
value = value / DIVIDER * CUR_MULT * RCURR / 1E6;
/* convert to DAC units */
d = (unsigned short) ((value / 2.5 * 65535) + 0.5);
}
/* write current dac */
write_dac(5, d);
#else // HARDWARE_TRIP
if (value == 9999)
trip_disable = 1;
else
trip_disable = 0;
#endif // !HARDWARE_TRIP
}
unsigned char adc_read(unsigned char channel, float *value)
{
unsigned long d, start_time;
unsigned char i;
/* start conversion */
channel = adc_index[channel % 8];
write_adc(REG_CONTROL, channel << 4 | 0x0F); // adc_chn, +2.56V range
write_adc(REG_MODE, 2); // single conversion
start_time = time();
while (ADC_NRDY) {
yield();
for (i=0 ; i<N_HV_CHN ; i++)
ramp_hv(i); // do ramping while reading ADC
/* abort if no ADC ready after 300ms */
if (time() - start_time > 30) {
/* reset ADC */
ADC_NRES = 0;
delay_ms(100);
ADC_NRES = 1;
delay_ms(300);
write_adc(REG_FILTER, ADC_SF_VALUE);
return 0;
}
}
read_adc24(REG_ADCDATA, &d);
/* convert to volts */
*value = ((float)d / (1l<<24)) * 2.56;
/* round result to 6 digits */
*value = floor(*value*1E6+0.5)/1E6;
return 1;
}
void adc_calib()
{
unsigned char i;
for (i=0 ; i<8 ; i++) {
write_adc(REG_CONTROL, i << 4 | 0x0F);
/* zero calibration */
write_adc(REG_MODE, 4);
while (ADC_NRDY) led_blink(1, 1, 100);
/* full scale calibration */
write_adc(REG_MODE, 5);
while (ADC_NRDY) led_blink(1, 1, 100);
}
/* restart continuous conversion */
write_adc(REG_MODE, 3);
}
unsigned char hardware_current_trip(unsigned char channel)
{
unsigned char d;
/* continuously set FF reset, in case ADC got HV flash */
if (trip_disable) {
write_adc(REG_IOCONTROL, (1 << 4)); // P1DIR=1,P1DAT=0
return 0;
}
/* do not check if reset in progres */
if (trip_reset)
return 0;
read_adc8(REG_IOCONTROL, &d);
/* P2 of AD7718 should be low in case of trip */
if ((d & 2) > 0)
return 0;
if (user_data[channel].adc_gain == 1) {
/* uncalibrated */
if (user_data[channel].u_meas < 100 &&
user_data[channel].u_demand > 150)
return 1;
return 0;
} else {
/* calibrated */
if (user_data[channel].u_meas < 5 && user_data[channel].u_demand >= 5)
return 1;
return 0;
}
return 0;
}
void user_init(unsigned char init)
{
unsigned char i;
unsigned short address;
/* all output open drain */
P1MDOUT = 0x00;
P2MDOUT = 0x00;
/* initial nonzero EEPROM values */
if (init) {
memset(user_data, 0, sizeof(user_data));
for (i=0 ; i<N_HV_CHN ; i++) {
user_data[i].ramp_up = 300;
user_data[i].ramp_down = 300;
user_data[i].u_limit = MAX_VOLTAGE;
user_data[i].i_limit = MAX_CURRENT;
user_data[i].ri_limit = MAX_CURRENT;
user_data[i].trip_time = 10;
user_data[i].adc_gain = 1;
user_data[i].dac_gain = 1;
user_data[i].cur_gain = 1;
}
}
/* default control register */
for (i=0 ; i<N_HV_CHN ; i++) {
user_data[i].control = CONTROL_REGULATION;
user_data[i].status = 0;
user_data[i].u_demand = 0;
user_data[i].trip_cnt = 0;
/* check maximum ratings */
if (user_data[i].u_limit > MAX_VOLTAGE)
user_data[i].u_limit = MAX_VOLTAGE;
if (user_data[i].i_limit > MAX_CURRENT && user_data[i].i_limit != 9999)
user_data[i].i_limit = MAX_CURRENT;
u_actual[i] = 0;
t_ramp[i] = time();
}
/* jumper and address bits as input */
JU1 = 1;
JU2 = 1;
SW1 = 1;
SW2 = 1;
GA_A0 = 1;
GA_A1 = 1;
GA_A2 = 1;
GA_A3 = 1;
GA_A4 = 1;
GA_A5 = 1;
/* read six address bits */
address = GA_A5;
address = (address << 1) | GA_A4;
address = (address << 1) | GA_A3;
address = (address << 1) | GA_A2;
address = (address << 1) | GA_A1;
address = (address << 1) | GA_A0;
/* each device has 5 channels */
address *= 5;
/* keep high byte of node address */
address |= (sys_info.node_addr & 0xFF00);
sys_info.node_addr = address;
/* set default group address */
if (sys_info.group_addr == 0xFFFF)
sys_info.group_addr = 500;
/* sample initial state of switch */
old_sw1 = SW1;
if (old_sw1)
for (i=0 ; i<N_HV_CHN ; i++)
user_data[i].status |= STATUS_DISABLED;
/* set-up DAC & ADC */
DAC_CLR = 1;
ADC_NRES = 1;
ADC_NRDY = 1; // input
ADC_DIN = 1; // input
delay_ms(300); // wait for the ADC to come up after power on
reset_adc();
#ifdef HARDWARE_TRIP
/* reset current trip FF's */
reset_hardware_trip();
#else
/* disable hardware trip FF's */
write_adc(REG_IOCONTROL, (1 << 4));
#endif
/* force update */
for (i=0 ; i<N_HV_CHN ; i++)
chn_bits[i] = DEMAND_CHANGED | CUR_LIMIT_CHANGED;
/* LED normally off (inverted) */
for (i=0 ; i<N_HV_CHN ; i++)
led_mode(i, 1);
/* initially, trips are enabled */
trip_reset = 1; // reset once
trip_disable = 0; // trip initially enabled
for (i=0 ; i<N_HV_CHN ; i++)
trip_time[i] = 0;
}
void user_init(unsigned char init)
{
unsigned char i;
P2MDOUT = 0xF0; // P2.4-7: enable Push/Pull for LEDs
P3MDOUT = 0;
/* initial nonzero EEPROM values */
if (init) {
memset(user_data, 0, sizeof(user_data));
for (i=0 ; i<N_HV_CHN ; i++) {
user_data[i].ramp_up = 300;
user_data[i].ramp_down = 300;
user_data[i].u_limit = MAX_VOLTAGE;
user_data[i].i_limit = MAX_CURRENT;
user_data[i].ri_limit = MAX_CURRENT;
user_data[i].trip_time = 10;
user_data[i].adc_gain = 1;
user_data[i].dac_gain = 1;
user_data[i].cur_gain = 1;
}
}
/* default control register */
for (i=0 ; i<N_HV_CHN ; i++) {
user_data[i].control = CONTROL_REGULATION;
user_data[i].status = 0;
user_data[i].u_demand = 0;
user_data[i].trip_cnt = 0;
/* check maximum ratings */
if (user_data[i].u_limit > MAX_VOLTAGE)
user_data[i].u_limit = MAX_VOLTAGE;
if (user_data[i].i_limit > MAX_CURRENT && user_data[i].i_limit != 9999)
user_data[i].i_limit = MAX_CURRENT;
u_actual[i] = 0;
t_ramp[i] = time();
}
/* set default group address */
if (sys_info.group_addr == 0xFFFF)
sys_info.group_addr = 400;
/* jumper as input */
JU0 = 1;
JU1 = 1;
JU2 = 1;
/* read node configuration */
for (i=0 ; i<N_HV_CHN ; i++) {
if (JU0 == 0)
user_data[i].status |= STATUS_NEGATIVE;
else
user_data[i].status &= ~STATUS_NEGATIVE;
if (JU1 == 0)
user_data[i].status |= STATUS_LOWCUR;
else
user_data[i].status &= ~STATUS_LOWCUR;
}
/* set-up DAC & ADC */
DAC_CLR = 1;
ADC_NRES = 1;
ADC_NRDY = 1; // input
ADC_DIN = 1; // input
/* reset and wait for start-up of ADC */
ADC_NRES = 0;
delay_ms(100);
ADC_NRES = 1;
delay_ms(300);
write_adc(REG_FILTER, ADC_SF_VALUE);
/* force update */
for (i=0 ; i<N_HV_CHN ; i++)
chn_bits[i] = DEMAND_CHANGED | CUR_LIMIT_CHANGED;
/* LED normally off (inverted) */
for (i=0 ; i<N_HV_CHN ; i++)
led_mode(i, 1);
for (i=0 ; i<N_HV_CHN ; i++)
trip_time[i] = 0;
}
void user_init(unsigned char init)
{
unsigned char i;
unsigned short value;
/* configure crossbar */
SFRPAGE = CONFIG_PAGE;
XBR0 = 0x04; // Enable UART0
XBR1 = 0x14; // Enable INT0 and INT1
XBR2 = 0x40; // Enable crossbar
/* enable external interrupts */
SFRPAGE = TIMER01_PAGE;
PX0 = 1; // INT0 high priority
PX1 = 1; // INT1 high priority
IT0 = 1; // INT0 is edge sensitive
IT1 = 1; // INT1 is edge sensitive
IE0 = 0; // Clear pending INT0
IE1 = 0; // Clear pending INT1
EX0 = 0; // INTs will be enabled
EX1 = 0; // later in hv_on()
SFRPAGE = CONFIG_PAGE;
P0MDOUT = 0x11; // P0.0: TX = Push Pull, P0.4: WD
P1MDOUT = 0x00; // all open drain
P2MDOUT = 0x60; // P2.5/6: HV_POWER
P3MDOUT = 0x00;
/* initial nonzero EEPROM values */
if (init) {
for (i=0 ; i<N_HV_CHN ; i++) {
user_data[i].u_demand = 0;
user_data[i].trip_cnt = 0;
user_data[i].ramp_up = 100;
user_data[i].ramp_down = 100;
user_data[i].u_limit = MAX_VOLTAGE;
user_data[i].i_limit = MAX_CURRENT;
user_data[i].ri_limit = MAX_CURRENT;
user_data[i].trip_max = 0;
user_data[i].trip_time = 10;
user_data[i].adc_gain = 1;
user_data[i].adc_offset = 0;
user_data[i].dac_gain = 1;
user_data[i].dac_offset = 0;
user_data[i].cur_vgain = 0;
user_data[i].cur_gain = 1;
user_data[i].cur_offset = 0;
}
}
/* default control register */
for (i=0 ; i<N_HV_CHN ; i++) {
user_data[i].control = CONTROL_REGULATION;
user_data[i].status = 0;
user_data[i].u_demand = 0;
user_data[i].trip_cnt = 0;
/* check maximum ratings */
if (user_data[i].u_limit > MAX_VOLTAGE)
user_data[i].u_limit = MAX_VOLTAGE;
if (user_data[i].i_limit > MAX_CURRENT && user_data[i].i_limit != 9999)
user_data[i].i_limit = MAX_CURRENT;
if (user_data[i].ri_limit > MAX_CURRENT)
user_data[i].ri_limit = MAX_CURRENT;
u_actual[i] = 0;
t_ramp[i] = time();
/* read pos/neg jumper */
JU1 = 1;
if (JU1 == 0)
user_data[i].status |= STATUS_NEGATIVE;
else
user_data[i].status &= ~STATUS_NEGATIVE;
user_data[i].status |= STATUS_LOWCUR;
}
/* switch off HVs */
hv_on(0, 0);
hv_on(1, 0);
/* HV power reset */
HV1_POWER = 0;
HV2_POWER = 0;
delay_ms(400);
HV1_POWER = 1;
HV2_POWER = 1;
/* set default group address */
if (sys_info.group_addr == 0xFFFF)
sys_info.group_addr = 200;
/* get address from crate backplane read through internal ADC */
SFRPAGE = LEGACY_PAGE;
REF0CN = 0x03; // use internal voltage reference
AMX0CF = 0x00; // select single ended analog inputs
ADC0CF = 0x98; // ADC Clk 2.5 MHz @ 98 MHz, gain 1
ADC0CN = 0x80; // enable ADC
SFRPAGE = ADC0_PAGE;
sys_info.node_addr = 0;
for (i=0 ; i<7 ; i++) {
AMX0SL = i; // set multiplexer
delay_ms(10); // wait for settling time
DISABLE_INTERRUPTS;
AD0INT = 0;
AD0BUSY = 1;
while (!AD0INT); // wait until conversion ready
ENABLE_INTERRUPTS;
value = ADC0L | (ADC0H << 8);
if (value > 1000)
sys_info.node_addr |= (1 << i);
}
/* each unit contains two addresses */
sys_info.node_addr <<= 1;
/* set-up DAC & ADC */
ADC_NRDY = 1; // input
ADC_DIN = 1; // input
ADC_NRES = 1; // remove reset
DAC_NCLR = 1; // remove clear
write_adc(REG_FILTER, ADC_SF_VALUE);
/* force update */
for (i=0 ; i<N_HV_CHN ; i++)
chn_bits[i] = DEMAND_CHANGED | CUR_LIMIT_CHANGED;
/* LED normally off (inverted) */
for (i=0 ; i<N_HV_CHN ; i++)
led_mode(i, 1);
/* initially, trips are enabled */
trip_enable(0, 1);
trip_enable(0, 2);
trip0 = trip1 = 0;
trip0_reset = trip1_reset = 0;
trip_change[0] = trip_change[1] = 0;
trip_time[0] = trip_time[1] = 0;
}
void user_init(unsigned char init)
{
unsigned char i;
ADC0CN = 0x00; // disable ADC
DAC0CN = 0x00; // disable DAC0
DAC1CN = 0x00; // disable DAC1
REF0CN = 0x00; // disenable internal reference
/* push-pull:
P0.0 TX
P0.1
P0.2 SW_ADC
P0.3 DAC_NCS
P0.4 DAC_SCK
P0.5 DAC_DIN
P0.6
P0.7 DAC_CLR
*/
PRT0CF = 0xBD;
P0 = 0xFF;
/* push-pull:
P1.0 SW_DAC
P1.1
P1.2 ADC_NRES
P1.3 ADC_SCLK
P1.4 ADC_NCS
P1.5
P1.6
P1.7 ADC_DIN
*/
PRT1CF = 0x9D;
P1 = 0xFF;
/* initial EEPROM value */
if (init) {
for (i = 0; i < 8; i++)
user_data.dac[i] = 0;
}
/* set-up DAC & ADC */
DAC_CLR = 1;
ADC_NRES = 1;
write_adc(REG_FILTER, 82); // SF value for 50Hz rejection
write_adc(REG_MODE, 3); // continuous conversion
write_adc(REG_CONTROL, adc_chn << 4 | 0x0F); // Chn. 1, +2.56V range
/* write DACs and UNI_BIP */
for (i=0 ; i<8 ; i++)
user_write(i+8);
user_write(16);
/* swich unipolar/bipolar */
user_data.uni_dac = 0;
user_data.uni_adc = 0;
user_data.adc_25 = 0;
UNI_DAC = user_data.uni_dac;
UNI_ADC = !user_data.uni_adc;
}