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/**
*
* Author: Dylan Muller
* Copyright (c) 2025
* All rights reserved.
*
* - Commercial/IP use prohibited.
* - Attribution required.
* See License.txt
*
*/
#include "setup.h"
#include "peripheral/spi.h"
#include "driver/mcp3202.h"
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
void adc_init(void)
{
MCP3202_DEV_0_DDR |= (1 << MCP3202_DEV_0_SS);
MCP3202_DEV_1_DDR |= (1 << MCP3202_DEV_1_SS);
MCP3202_DEV_0_PORT &= ~(1 << MCP3202_DEV_0_SS);
MCP3202_DEV_1_PORT &= ~(1 << MCP3202_DEV_1_SS);
_delay_ms(TRANSACT_DELAY_MS);
MCP3202_DEV_0_PORT |= (1 << MCP3202_DEV_0_SS);
MCP3202_DEV_1_PORT |= (1 << MCP3202_DEV_1_SS);
_delay_ms(TRANSACT_DELAY_MS);
}
uint16_t adc_read(
uint8_t id,
uint8_t conv_bypass
)
{
uint8_t dev_id = 0x0;
uint8_t dev_ch = 0x0;
uint8_t dev_ss = 0x0;
uint8_t* dev_port = 0x0;
uint8_t cmd_buf[3] = {0x0, 0x0, 0x0};
uint16_t adc_daq = 0x0;
switch(id)
{
case MCP3202_ID_FW_POWER:
dev_id = MCP3202_DEV_FW_POWER;
dev_ch = MCP3202_CHN_FW_POWER;
break;
case MCP3202_ID_REV_POWER:
dev_id = MCP3202_DEV_REV_POWER;
dev_ch = MCP3202_CHN_REV_POWER;
break;
case MCP3202_ID_DRAIN_VOLT:
dev_id = MCP3202_DEV_DRAIN_VOLT;
dev_ch = MCP3202_CHN_DRAIN_VOLT;
break;
case MCP3202_ID_DRAIN_AMP:
dev_id = MCP3202_DEV_DRAIN_AMP;
dev_ch = MCP3202_CHN_DRAIN_AMP;
break;
}
switch(dev_id)
{
case MCP3202_DEV_0:
dev_port = (uint8_t*)&MCP3202_DEV_0_PORT;
dev_ss = MCP3202_DEV_0_SS;
break;
case MCP3202_DEV_1:
dev_port = (uint8_t*)&MCP3202_DEV_1_PORT;
dev_ss = MCP3202_DEV_1_SS;
break;
}
cmd_buf[0] = MCP3202_REQ_START;
cmd_buf[1] = (dev_ch == MCP3202_CHN_0) ? MCP3202_REQ_CH0 : MCP3202_REQ_CH1;
cmd_buf[2] = MCP3202_REQ_PAD;
spi_start(cmd_buf, cmd_buf, sizeof(cmd_buf), dev_port, dev_ss);
spi_flush();
adc_daq = (uint16_t)(cmd_buf[MCP3202_DAQ_MSB]);
adc_daq |= ((uint16_t)(cmd_buf[MCP3202_DAQ_LSB] & 0xF) << 8);
adc_daq = adc_daq & 0xFFF;
if (conv_bypass == 0)
{
switch(id)
{
case MCP3202_ID_DRAIN_VOLT:
adc_daq = (uint32_t)(((uint32_t)adc_daq * MCP3202_DRAIN_VOLT_GAIN)/10);
break;
case MCP3202_ID_DRAIN_AMP:
adc_daq = (uint32_t)(((uint32_t)adc_daq * 10)/MCP3202_DRAIN_AMP_GAIN);
break;
}
}
return (uint16_t)adc_daq;
}
uint16_t adc_read_n(
uint8_t id,
uint8_t n
)
{
uint32_t x = 0;
uint8_t i = 0;
for (i = 0; i < n; i++)
{
x += adc_read(id, 0);
}
x /= n;
return (uint16_t)x;
}
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