//Function that writes configuration of LTC6803-1/-3
void LTC6803_wrcfg(uint8_t total_ic,uint8_t config[][6])
{
uint8_t BYTES_IN_REG = 6;
uint8_t CMD_LEN = 2+(7*total_ic);
uint8_t *cmd;
uint16_t cfg_pec;
uint8_t cmd_index; //command counter
cmd = (uint8_t *)malloc(CMD_LEN*sizeof(uint8_t));
cmd[0] = 0x01;
cmd[1] = 0xc7;
cmd_index = 2;
for (uint8_t current_ic = total_ic; current_ic > 0; current_ic--)
{
for (uint8_t current_byte = 0; current_byte < BYTES_IN_REG; current_byte++)
{
cmd[cmd_index] = config[current_ic-1][current_byte];
cmd_index = cmd_index + 1;
}
cfg_pec = pec8_calc(BYTES_IN_REG, &config[current_ic-1][0]); // calculating the PEC for each ICs configuration register data
cmd[cmd_index ] = (uint8_t)cfg_pec;
cmd_index = cmd_index + 1;
}
output_low(LTC6803_CS);
spi_write_array(CMD_LEN, cmd);
output_high(LTC6803_CS);
free(cmd);
}
// Start an open wire Conversion
void ltc6811_adow(
uint8_t MD, //ADC Mode
uint8_t PUP //Discharge Permit
)
{
uint8_t cmd[4];
uint16_t cmd_pec;
uint8_t md_bits;
md_bits = (MD & 0x02) >> 1;
cmd[0] = md_bits + 0x02;
md_bits = (MD & 0x01) << 7;
cmd[1] = md_bits + 0x28 + (PUP<<6) ;//+ CH;
cmd_pec = pec15_calc(2, cmd);
cmd[2] = (uint8_t)(cmd_pec >> 8);
cmd[3] = (uint8_t)(cmd_pec);
// wakeup_idle (); //This will guarantee that the ltc6811 isoSPI port is awake. This command can be removed.
output_low(LTC6811_CS);
spi_write_array(4,cmd);
output_high(LTC6811_CS);
}
/*
Starts cell voltage conversion
*/
void ltc6811_adcv(
uint8_t MD, //ADC Mode
uint8_t DCP, //Discharge Permit
uint8_t CH //Cell Channels to be measured
)
{
uint8_t cmd[4];
uint16_t cmd_pec;
uint8_t md_bits;
md_bits = (MD & 0x02) >> 1;
cmd[0] = md_bits + 0x02;
md_bits = (MD & 0x01) << 7;
cmd[1] = md_bits + 0x60 + (DCP<<4) + CH;
cmd_pec = pec15_calc(2, cmd);
cmd[2] = (uint8_t)(cmd_pec >> 8);
cmd[3] = (uint8_t)(cmd_pec);
//wakeup_idle (); //This will guarantee that the ltc6811 isoSPI port is awake. This command can be removed.
output_low(LTC6811_CS);
spi_write_array(4,cmd);
output_high(LTC6811_CS);
}
// Start a Status register redundancy test Conversion
void ltc6811_adstatd(
uint8_t MD, //ADC Mode
uint8_t CHST //GPIO Channels to be measured
)
{
uint8_t cmd[4];
uint16_t cmd_pec;
uint8_t md_bits;
md_bits = (MD & 0x02) >> 1;
cmd[0] = md_bits + 0x04;
md_bits = (MD & 0x01) << 7;
cmd[1] = md_bits + 0x08 + CHST ;
cmd_pec = pec15_calc(2, cmd);
cmd[2] = (uint8_t)(cmd_pec >> 8);
cmd[3] = (uint8_t)(cmd_pec);
// wakeup_idle (); //This will guarantee that the ltc6811 isoSPI port is awake. This command can be removed.
output_low(LTC6811_CS);
spi_write_array(4,cmd);
output_high(LTC6811_CS);
}
//Starts cell voltage and SOC conversion
void ltc6811_adcvsc(
uint8_t MD, //ADC Mode
uint8_t DCP //Discharge Permit
)
{
uint8_t cmd[4];
uint16_t cmd_pec;
uint8_t md_bits;
//1
md_bits = (MD & 0x02) >> 1;
cmd[0] = md_bits + 0x04;
md_bits = (MD & 0x01) << 7;
cmd[1] = md_bits + 0x60 + (DCP<<4) +0x07;
//2
cmd_pec = pec15_calc(2, cmd);
cmd[2] = (uint8_t)(cmd_pec >> 8);
cmd[3] = (uint8_t)(cmd_pec);
//3
// wakeup_idle (); //This will guarantee that the ltc6811 isoSPI port is awake. This command can be removed.
//4
output_low(LTC6811_CS);
spi_write_array(4,cmd);
output_high(LTC6811_CS);
}
//Sends the poll adc command
uint8_t ltc6811_pladc()
{
uint8_t cmd[4];
uint16_t cmd_pec;
uint8_t adc_state = 0xFF;
cmd[0] = 0x07;
cmd[1] = 0x14;
cmd_pec = pec15_calc(2, cmd);
cmd[2] = (uint8_t)(cmd_pec >> 8);
cmd[3] = (uint8_t)(cmd_pec);
//wakeup_idle (); //This will guarantee that the ltc6811 isoSPI port is awake. This command can be removed.
output_low(LTC6811_CS);
spi_write_array(4,cmd);
adc_state = spi_read(0xFF);
output_high(LTC6811_CS);
return(adc_state);
}
//This function will block operation until the ADC has finished it's conversion
uint32_t ltc6811_pollAdc()
{
uint32_t counter = 0;
uint8_t finished = 0;
uint8_t current_time = 0;
uint8_t cmd[4];
uint16_t cmd_pec;
cmd[0] = 0x07;
cmd[1] = 0x14;
cmd_pec = pec15_calc(2, cmd);
cmd[2] = (uint8_t)(cmd_pec >> 8);
cmd[3] = (uint8_t)(cmd_pec);
//wakeup_idle (); //This will guarantee that the ltc6811 isoSPI port is awake. This command can be removed.
output_low(LTC6811_CS);
spi_write_array(4,cmd);
while ((counter<200000)&&(finished == 0))
{
current_time = spi_read(0xFF);
if (current_time>0)
{
finished = 1;
}
else
{
counter = counter + 10;
}
}
output_high(LTC6811_CS);
return(counter);
}
//Start a Status Register Self Test Conversion
void ltc6811_statst(
uint8_t MD, //ADC Mode
uint8_t ST //Self Test
)
{
uint8_t cmd[4];
uint16_t cmd_pec;
uint8_t md_bits;
md_bits = (MD & 0x02) >> 1;
cmd[0] = md_bits + 0x04;
md_bits = (MD & 0x01) << 7;
cmd[1] = md_bits + ((ST&0x03)<<5) +0x0F;
cmd_pec = pec15_calc(2, cmd);
cmd[2] = (uint8_t)(cmd_pec >> 8);
cmd[3] = (uint8_t)(cmd_pec);
//wakeup_idle (); //This will guarantee that the ltc6811 isoSPI port is awake. This command can be removed.
output_low(LTC6811_CS);
spi_write_array(4,cmd);
output_high(LTC6811_CS);
}
