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Move PWM and MOSFET implementations into separate module files

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This commit is contained in:
Leon Krieg
2024-09-03 02:24:31 +02:00
parent cd1a481ef6
commit 0e15d5b1e2
8 changed files with 186 additions and 169 deletions
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35
src/bus/mosfet.c Normal file
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@@ -0,0 +1,35 @@
#include "common.h"
#include "bus/mosfet.h"
int MOS_Init(void)
{
// PB0: MOSFET #1 Peltier
DDRB |= BIT(PB0); // Output
PORTB &= ~BIT(PB0); // Low
// PB1: MOSFET #2 Heating
DDRB |= BIT(PB1); // Output
PORTB &= ~BIT(PB1); // Low
// PB2: MOSFET #3 Lights
DDRB |= BIT(PB2); // Output
PORTB |= BIT(PB2); // High
return 0;
}
void MOS_Enable(int port)
{
if (port != MOS01 && port != MOS02 && port != MOS03)
return; // Invalid port
PORTB |= BIT(port);
}
void MOS_Disable(int port)
{
if (port != MOS01 && port != MOS02 && port != MOS03)
return; // Invalid port
PORTB &= ~BIT(port);
}

15
src/bus/mosfet.h Normal file
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@@ -0,0 +1,15 @@
#ifndef MAD_BUS_MOSFET_H
#define MAD_BUS_MOSFET_H
#include <avr/io.h>
// MOSFETS
#define MOS01 PB0 // Peltier Enable
#define MOS02 PB1 // Heating Enable
#define MOS03 PB2 // Lights Enable
int MOS_Init(void);
void MOS_Enable(int port);
void MOS_Disable(int port);
#endif // MAD_BUS_MOSFET_H

44
src/bus/pwm.c Normal file
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@@ -0,0 +1,44 @@
#include "common.h"
#include "bus/pwm.h"
int PWM_Init(void)
{
// PD4: PWM NF-12 Fan Peltier Hot Side
// PD5: PWM NF-A8 Fan Peltier Cold Side
// PD7: PWM NF-R8 Fan Heating Element
DDRD |= BIT(PD4) | BIT(PD5) | BIT(PD7);
// Fast mode, non-inverting, no prescaling
TCCR1A = BIT(WGM11) | BIT(COM1A1) | BIT(COM1B1);
TCCR1B = BIT(WGM12) | BIT(WGM13) | BIT(CS10);
TCCR2 = BIT(WGM20) | BIT(WGM21) | BIT(COM21) | BIT(CS20);
ICR1 = PWM_CYCLE_TOP; // 8000 MHz / 25000 KHz
// TODO: Enable 25 KHz frequency for timer 3
OCR1A = FAN01_MIN_DUTY;
OCR1B = FAN02_MIN_DUTY;
OCR2 = FAN03_MIN_DUTY;
return 0;
}
// Port must be PD4, PD5 or PD7 and the value is
// expected to be in the range between 0 and 100
void PWM_SetValue(int port, int value)
{
int n;
if (port != PD4 && port != PD5 && port != PD7)
return; // Invalid port
n = CLAMP(value, 100, 0) * (PWM_CYCLE_TOP / 100.0f);
Info("Setting PWM value to %d...", n);
switch (port) {
case PD4: OCR1B = n; break;
case PD5: OCR1A = n; break;
case PD7: OCR2 = n; break;
}
}

19
src/bus/pwm.h Normal file
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@@ -0,0 +1,19 @@
#ifndef MAD_BUS_PWM_H
#define MAD_BUS_PWM_H
#include <avr/io.h>
// PWM Devices
#define FAN01 PD4 // NF-12 Fan Peltier Hot Side Speed
#define FAN02 PD5 // NF-A8 Fan Peltier Cold Side Speed
#define FAN03 PD7 // NF-R8 Fan Heating Element Speed
#define PWM_CYCLE_TOP (F_CPU / 25000) // 25 KHz
#define FAN01_MIN_DUTY (PWM_CYCLE_TOP * 0.2f)
#define FAN02_MIN_DUTY (PWM_CYCLE_TOP * 0.2f)
#define FAN03_MIN_DUTY (PWM_CYCLE_TOP * 0.2f)
int PWM_Init(void);
void PWM_SetValue(int port, int value);
#endif // MAD_BUS_PWM_H

53
src/bus/twi.c
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@@ -105,3 +105,56 @@ int TWI_Stop(void)
return 0;
}
int TWI_SetChannel(int channel)
{
unsigned char crb;
// assert(channel >= 0 && channel <= 3);
// PCA9546 I2C Multiplexer
// =======================
Info("Switching I2C channel to %d...", channel);
// Excerpts taken from the PCA9546A datasheet:
// https://www.ti.com/lit/ds/symlink/pca9546a.pdf
// Following a start condition, the bus master
// must output the address of the slave it is
// accessing.
// 7 6 5 4 | 3 2 1 0
// 1 1 1 0 | A2 A1 A0 RW
// FIXED_____ | SELECTABLE____
TWI_Start(0x70, 0);
TWI_Wait_ACK();
// Following the successful acknowledgment of
// the slave address, the bus master sends a byte
// which is stored in the control register.
// 7 6 5 4 | 3 2 1 0
// X X X X | B3 B2 B1 B0
// UNUSED____ | CHANNEL_______
crb = (1 << channel);
// crb = 0x01; // Channel 0 | 00000001
// crb = 0x02 // Channel 1 | 00000010
// crb = 0x04 // Channel 2 | 00000100
// crb = 0x08 // Channel 3 | 00001000
TWI_Write(crb);
// When a channel is selected, the channel
// becomes active after a stop condition has been
// placed on the I2C bus. A stop condition always
// must occur right after the acknowledge cycle.
TWI_Wait_ACK();
TWI_Stop();
return 0;
}

6
src/bus/twi.h
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@@ -1,8 +1,14 @@
#ifndef MAD_CORE_BUS_TWI_H
#define MAD_CORE_BUS_TWI_H
// Sensors
#define AHT01 0x0 // Upper Sensor TWI Channel
#define AHT02 0x1 // Middle Sensor TWI Channel
#define AHT03 0x2 // Lower Sensor TWI Channel
int TWI_Init(void);
int TWI_Start(unsigned char addr, unsigned char mode);
int TWI_SetChannel(int channel);
int TWI_Write(unsigned char data);
int TWI_Wait_ACK(void);
int TWI_Stop(void);

1
src/common/common.c
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@@ -1,7 +1,6 @@
#include "common.h"
#include "bus/usart.h"
#include <stdio.h>
#include <math.h>
static void Puts(const char *str)
{

182
src/main.c
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@@ -1,194 +1,40 @@
#include "common.h"
#include "bus/usart.h"
#include "bus/mosfet.h"
#include "bus/pwm.h"
#include "bus/twi.h"
#include <avr/interrupt.h>
// MOSFETS
#define MOS01 PB0 // Peltier Enable
#define MOS02 PB1 // Heating Enable
#define MOS03 PB2 // Lights Enable
// PWM Devices
#define FAN01 PD4 // NF-12 Fan Peltier Hot Side Speed
#define FAN02 PD5 // NF-A8 Fan Peltier Cold Side Speed
#define FAN03 PD7 // NF-R8 Fan Heating Element Speed
// Sensors
#define AHT01 0x0 // Upper Sensor TWI Channel
#define AHT02 0x1 // Middle Sensor TWI Channel
#define AHT03 0x2 // Lower Sensor TWI Channel
#define PWM_CYCLE_TOP (F_CPU / 25000) // 25 KHz
#define FAN01_MIN_DUTY (PWM_CYCLE_TOP * 0.2f)
#define FAN02_MIN_DUTY (PWM_CYCLE_TOP * 0.2f)
#define FAN03_MIN_DUTY (PWM_CYCLE_TOP * 0.2f)
static void SetPinDefaults(void);
static void SetTwiChannel(int channel);
static void SetMosState(int port, bool state);
static void SetPwmValue(int port, int value);
int main(void)
{
SetPinDefaults();
USART_Init();
TWI_Init();
sei();
Info("Initializing...");
// MOS_Enable(MOS03);
MOS_Init();
PWM_Init();
TWI_Init();
MOS_Enable(MOS03);
// MOS_Disable(MOS01);
// MOS_Disable(MOS02);
// PWM_Set(FAN01, 50);
// PWM_Set(FAN02, 50);
// PWM_Set(FAN03, 0);
PWM_SetValue(FAN01, 50);
PWM_SetValue(FAN02, 50);
PWM_SetValue(FAN03, 20);
SetMosState(MOS01, false);
SetMosState(MOS02, false);
SetMosState(MOS03, true);
// TODO: Set FAN03 timer frequency
// TODO: Implement ADS1115 and AHT20
SetPwmValue(FAN01, 50);
SetPwmValue(FAN02, 50);
SetPwmValue(FAN03, 20);
SetTwiChannel(0); // I2C Mux
TWI_SetChannel(AHT01); // I2C Mux
Info("Running idle loop...");
for (;;) {
Info("PING");
// Info("PING");
Sleep(1000);
}
return 0;
}
static void SetPinDefaults(void)
{
// Initialize Pin Outputs
// ======================
// PB0: MOSFET #1 Peltier
DDRB |= BIT(PB0); // Out
PORTB &= ~BIT(PB0); // Low
// PB1: MOSFET #2 Heating
DDRB |= BIT(PB1); // Out
PORTB &= ~BIT(PB1); // Low
// PB2: MOSFET #3 Lights
DDRB |= BIT(PB2); // Out
PORTB |= BIT(PB2); // High
// PD4: PWM NF-12 Fan Peltier Hot Side
// PD5: PWM NF-A8 Fan Peltier Cold Side
// PD7: PWM NF-R8 Fan Heating Element
DDRD |= BIT(PD4) | BIT(PD5) | BIT(PD7);
// Fast mode, non-inverting, no prescaling
TCCR1A = BIT(WGM11) | BIT(COM1A1) | BIT(COM1B1);
TCCR1B = BIT(WGM12) | BIT(WGM13) | BIT(CS10);
TCCR2 = BIT(WGM20) | BIT(WGM21) | BIT(COM21) | BIT(CS20);
ICR1 = PWM_CYCLE_TOP; // 8000 MHz / 25000 KHz
// TODO: Get 25 KHz frequency for timer 3
OCR1A = FAN01_MIN_DUTY;
OCR1B = FAN02_MIN_DUTY;
OCR2 = FAN03_MIN_DUTY;
}
static void SetTwiChannel(int channel)
{
unsigned char crb;
// assert(channel >= 0 && channel <= 3);
// PCA9546 I2C Multiplexer
// =======================
Info("Switching I2C channel to %d...", channel);
// Excerpts taken from the PCA9546A datasheet:
// https://www.ti.com/lit/ds/symlink/pca9546a.pdf
// Following a start condition, the bus master
// must output the address of the slave it is
// accessing.
// 7 6 5 4 | 3 2 1 0
// 1 1 1 0 | A2 A1 A0 RW
// FIXED_____ | SELECTABLE____
TWI_Start(0x70, 0);
TWI_Wait_ACK();
// Following the successful acknowledgment of
// the slave address, the bus master sends a byte
// which is stored in the control register.
// 7 6 5 4 | 3 2 1 0
// X X X X | B3 B2 B1 B0
// UNUSED____ | CHANNEL_______
crb = (1 << channel);
// crb = 0x01; // Channel 0 | 00000001
// crb = 0x02 // Channel 1 | 00000010
// crb = 0x04 // Channel 2 | 00000100
// crb = 0x08 // Channel 3 | 00001000
TWI_Write(crb);
// When a channel is selected, the channel
// becomes active after a stop condition has been
// placed on the I2C bus. A stop condition always
// must occur right after the acknowledge cycle.
TWI_Wait_ACK();
TWI_Stop();
Info("TWI channel was switched to %d!", channel);
}
// Port must be in the range between PB0 and PB2
static void SetMosState(int port, bool state)
{
if (port != PB0 && port != PB1 && port != PB2)
return; // Invalid port
Info("Setting MOS state to %s...", state ? "on" : "off");
if (state == true)
PORTB |= BIT(port);
else
PORTB &= ~BIT(port);
}
// Port must be PD4, PD5 or PD7 and the value is
// expected to be in the range between 0 and 100
static void SetPwmValue(int port, int value)
{
int n;
if (port != PD4 && port != PD5 && port != PD7)
return; // Invalid port
n = CLAMP(value, 100, 0) * (PWM_CYCLE_TOP / 100.0f);
Info("Setting PWM value to %d...", n);
switch (port) {
case PD4: OCR1B = n; break;
case PD5: OCR1A = n; break;
case PD7: OCR2 = n; break;
}
}