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fw: Implement initial firmware

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This commit is contained in:
Markus Koch 2024-02-04 19:59:12 +01:00
parent 3ffd686b57
commit 812c7e3327
17 changed files with 1037 additions and 0 deletions
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3
firmware/.gitignore vendored Normal file
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*.o
*.bin
*.hex

21
firmware/Makefile Normal file
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MCU=atmega8
CFLAGS=-g -Wall --param=min-pagesize=0 -mcall-prologues -mmcu=$(MCU) -O2 -DF_CPU=16000000
LDFLAGS=-Wl,-gc-sections -Wl,-relax
CC=avr-gcc
TARGET=leddie-firmware
OBJECT_FILES=lib/light_ws2812.o lib/pm.o lib/mma8653.o lib/timers.o lib/button.o lib/system.o app.o
all: $(TARGET).hex
clean:
rm -f *.o *.hex *.obj *.hex
rm -f lib/*.o
%.hex: %.obj
avr-objcopy -R .eeprom -O ihex $< $@
%.obj: $(OBJECT_FILES)
$(CC) $(CFLAGS) $(OBJECT_FILES) $(LDFLAGS) -o $@
program: $(TARGET).hex
avrdude -p $(MCU) -c usbasp -U flash:w:$(TARGET).hex

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#include "lib/system.h"
#include "lib/hal.h"
#include <stdlib.h>
#define TIMER_INMENU TIMER_APP0
#define TIMER_AUX TIMER_APP1
void axl_test()
{
int ret;
struct axl_result measurements;
int dir_x;
int dir_y;
int ledno;
int intens;
if (block_for(TIMER_AUX, timer_ms(50))) {
display_clear(0);
#define THRES 10
ret = mma8653_get_measurements(&measurements);
dir_x = 0;
if (measurements.x > THRES)
dir_x = -1;
else if (measurements.x < -THRES)
dir_x = 1;
dir_y = 0;
if (measurements.y > THRES)
dir_y = 1;
else if (measurements.y < -THRES)
dir_y = -1;
if (dir_y == -1)
ledno = dir_x + 1;
else if (dir_y == 0)
ledno = 3 + 1 -dir_x;
else if (dir_y == 1)
ledno = dir_x + 6 + 1;
intens = abs(measurements.x + measurements.y);
intens = intens >> 2;
if (intens < 1)
intens = 1;
if (measurements.z > 0)
led[ledno].b = intens;
else
led[ledno].r = intens;
if (ret)
led[ret].r = 0x10;
display_update();
}
}
void led_test(int first_launch)
{
static int i;
if (first_launch) {
i = 0;
led[0].r = 1;
}
if (block_for(TIMER_AUX, timer_ms(30))) {
led[i].g = 0x0;
i = (i + 1) % STRIPLEN;
led[i].g = 0x10;
if (led[i].r && led[i].b) {
led[i].r = 0;
led[i].b = 1;
} else if (led[i].r) {
led[i].b = 1;
} else {
led[i].r = 1;
led[i].b = 0;
}
display_update();
}
}
void system_test()
{
// Display power states on first face
if (HAL_ASSERTED_N(VLED_EN_N))
led[0].b = 1;
else
led[0].b = 0;
if (HAL_ASSERTED_N(CHG_ACTIVE_N))
led[1].r = 1;
else
led[1].r = 0;
if (block_for(TIMER_AUX, timer_ms(50)))
display_update();
}
void app_init()
{
return;
}
#define APP_COUNT 3
enum app_return app_mainloop()
{
static int app_sel = 0;
static int clr = 1;
if (button_event(EV_PRESS)) {
app_sel = (app_sel + 1) % APP_COUNT;
display_clear();
for (int i = 0; i < STRIPLEN; i += 9) {
led[app_sel + i].g = 4;
}
display_update();
timer_set(TIMER_INMENU, timer_ms(750));
clr = 1;
} else if (button_event(EV_LONGPRESS)) {
return SUSPEND;
}
if (timer_expired(TIMER_INMENU)) {
if (clr) {
display_clear();
}
switch (app_sel) {
case 0:
led_test(clr);
break;
case 1:
axl_test();
break;
case 2:
system_test();
break;
default:
app_sel = 0;
break;
}
clr = 0;
}
return RUN;
}

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firmware/flash.sh Executable file
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#!/bin/bash
while [ 1 ]; do
make program
if [ $? -eq 0 ]; then
break;
fi
sleep 1
done

87
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#include <avr/interrupt.h>
#include "button.h"
#include "timers.h"
#include "hal.h"
#include <util/delay.h>
#include "pm.h" // TODO: FOR DEBUGGING ONLY
volatile enum BUTTON_EVENTS button_event_status = NONE;
// User button interrupt
ISR(INT1_vect)
{
_delay_ms(50);
if (HAL_ASSERTED_N(BUTTON_N)) { // Button down event
switch (button_event_status) {
case NONE: // Start processing button from NONE,
case EV_BOOT: // or drop boot event if not polled for,
case EV_PRESS: // or drop current keypress to prevent unhandled keypresses from blocking other would-be-handled keypresses
case EV_DOUBLEPRESS:
case EV_LONGPRESS:
case EV_DOUBLELONGPRESS:
button_event_status = WAIT_FOR_RELEASE_1;
timer_set(TIMER_BUTTON, timer_ms(500));
break;
case WAIT_FOR_SECOND:
button_event_status = WAIT_FOR_RELEASE_2;
timer_set(TIMER_BUTTON, timer_ms(500));
break;
default:
break;
}
} else { // Button up event
switch (button_event_status) {
case WAIT_FOR_RELEASE_1:
button_event_status = WAIT_FOR_SECOND;
break;
case WAIT_FOR_RELEASE_2:
button_event_status = EV_DOUBLEPRESS;
break;
default:
break;
}
}
return;
}
void button_init()
{
HAL_INIT(BUTTON_N, INPUT, ON); // Pull-up for user button
button_event_status = EV_BOOT;
MCUCR = (1 << ISC10); // Any-edge interrupt
GICR = (1 << INT1); // Turn on button interrupt
}
void button_systick_cb()
{
if (button_event_status != 0) { // TODO: we should not enter on pending EV?
if (timer_expired(TIMER_BUTTON)) {
switch (button_event_status) {
case WAIT_FOR_RELEASE_1:
button_event_status = EV_LONGPRESS;
break;
case WAIT_FOR_RELEASE_2:
button_event_status = EV_DOUBLELONGPRESS;
pm_reset(); // TODO: For debugging purposes only
break;
case WAIT_FOR_SECOND:
button_event_status = EV_PRESS;
break;
default:
break;
}
}
}
}
int button_event(enum BUTTON_EVENTS ev)
{
if (button_event_status == ev) {
button_event_status = NONE; // Mark as handled
return 1;
}
return 0;
}

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#ifndef _BUTTON_H
#define _BUTTON_H
enum BUTTON_EVENTS {
NONE, WAIT_FOR_RELEASE_1, WAIT_FOR_SECOND, WAIT_FOR_RELEASE_2, // Intermediate states
EV_PRESS, EV_DOUBLEPRESS, EV_LONGPRESS, EV_DOUBLELONGPRESS, EV_BOOT// Button events
};
void button_init();
int button_event(enum BUTTON_EVENTS ev);
extern void button_systick_cb();
void button_systick_cb();
#endif // _BUTTON_H

51
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#ifndef _HAL_H
#define _HAL_H
#include <avr/io.h>
#define HAL_OUTPUT(name) PORT_##name(DDR) |= PIN_##name
#define HAL_INPUT(name) PORT_##name(DDR) &= ~(PIN_##name)
#define HAL_SET(name) PORT_##name(PORT) |= PIN_##name
#define HAL_CLEAR(name) PORT_##name(PORT) &= ~(PIN_##name)
#define HAL_ISHIGH(name) (PORT_##name(PIN) & PIN_##name)
#define HAL_ON(name) HAL_SET(name)
#define HAL_ON_N(name) HAL_CLEAR(name)
#define HAL_OFF(name) HAL_CLEAR(name)
#define HAL_OFF_N(name) HAL_SET(name)
#define HAL_ASSERTED(name) HAL_ISHIGH(name)
#define HAL_ASSERTED_N(name) (!HAL_ISHIGH(name))
#define HAL_INIT(name, type, default) HAL_##default(name); HAL_##type(name)
#define PORT_VBUS_SENSE(t) t##B
#define PIN_VBUS_SENSE (1 << 2)
#define PORT_VLED_EN_N(t) t##D
#define PIN_VLED_EN_N (1 << 6) // Hotfix
#define PORT_CHG_ACTIVE_N(t) t##D
#define PIN_CHG_ACTIVE_N (1 << 7) // Hotfix
#define PORT_BAT_SENSE(t) t##C
#define PIN_BAT_SENSE (1 << 0)
#define PORT_BAT_SENSE_EN_N(t) t##C
#define PIN_BAT_SENSE_EN_N (1 << 1)
#define PORT_AXL_EN(t) t##C
#define PIN_AXL_EN (3 << 2)
#define PORT_AXL_I2C(t) t##C
#define PIN_AXL_I2C (3 << 4)
#define PORT_BUTTON_N(t) t##D
#define PIN_BUTTON_N (1 << 3)
// LED pin defined in `light_ws2812.h`.
#endif

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firmware/lib/light_ws2812.c Normal file
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/*
* light weight WS2812 lib V2.0b
*
* Controls WS2811/WS2812/WS2812B RGB-LEDs
* Author: Tim (cpldcpu@gmail.com)
*
* Jan 18th, 2014 v2.0b Initial Version
* Nov 29th, 2015 v2.3 Added SK6812RGBW support
*
* License: GNU GPL v2+ (see License.txt)
*/
#include "light_ws2812.h"
#include <avr/interrupt.h>
#include <avr/io.h>
#include <util/delay.h>
// Normally ws2812_sendarray_mask() runs under disabled-interrupt condition,
// undefine if you want to accept interrupts in that function.
#define interrupt_is_disabled
// Setleds for standard RGB
void inline ws2812_setleds(struct cRGB *ledarray, uint16_t leds)
{
ws2812_setleds_pin(ledarray,leds, _BV(ws2812_pin));
}
void inline ws2812_setleds_pin(struct cRGB *ledarray, uint16_t leds, uint8_t pinmask)
{
ws2812_sendarray_mask((uint8_t*)ledarray,leds+leds+leds,pinmask);
_delay_us(ws2812_resettime);
}
// Setleds for SK6812RGBW
void inline ws2812_setleds_rgbw(struct cRGBW *ledarray, uint16_t leds)
{
ws2812_sendarray_mask((uint8_t*)ledarray,leds<<2,_BV(ws2812_pin));
_delay_us(ws2812_resettime);
}
void ws2812_sendarray(uint8_t *data,uint16_t datlen)
{
ws2812_sendarray_mask(data,datlen,_BV(ws2812_pin));
}
/*
This routine writes an array of bytes with RGB values to the Dataout pin
using the fast 800kHz clockless WS2811/2812 protocol.
*/
// Timing in ns
#define w_zeropulse 350 //300
#define w_onepulse 800 //600
#define w_totalperiod 1250 //1100
// Fixed cycles used by the inner loop
#define w_fixedlow 2
#define w_fixedhigh 4
#define w_fixedtotal 8
// Insert NOPs to match the timing, if possible
#define w_zerocycles (((F_CPU/1000)*w_zeropulse )/1000000)
#define w_onecycles (((F_CPU/1000)*w_onepulse +000000)/1000000)
#define w_totalcycles (((F_CPU/1000)*w_totalperiod +500000)/1000000)
// w1 - nops between rising edge and falling edge - low
#define w1 (w_zerocycles-w_fixedlow)
// w2 nops between fe low and fe high
#define w2 (w_onecycles-w_fixedhigh-w1)
// w3 nops to complete loop
#define w3 (w_totalcycles-w_fixedtotal-w1-w2)
#if w1>0
#define w1_nops w1
#else
#define w1_nops 0
#endif
// The only critical timing parameter is the minimum pulse length of the "0"
// Warn or throw error if this timing can not be met with current F_CPU settings.
#define w_lowtime ((w1_nops+w_fixedlow)*1000000)/(F_CPU/1000)
#if w_lowtime>550
#error "Light_ws2812: Sorry, the clock speed is too low. Did you set F_CPU correctly?"
#elif w_lowtime>450
#warning "Light_ws2812: The timing is critical and may only work on WS2812B, not on WS2812(S)."
#warning "Please consider a higher clockspeed, if possible"
#endif
#if w2>0
#define w2_nops w2
#else
#define w2_nops 0
#endif
#if w3>0
#define w3_nops w3
#else
#define w3_nops 0
#endif
#define w_nop1 "nop \n\t"
#ifdef interrupt_is_disabled
#define w_nop2 "brid .+0 \n\t"
#else
#define w_nop2 "brtc .+0 \n\t"
#endif
#define w_nop4 w_nop2 w_nop2
#define w_nop8 w_nop4 w_nop4
#define w_nop16 w_nop8 w_nop8
void inline ws2812_sendarray_mask(uint8_t *data,uint16_t datlen,uint8_t maskhi)
{
uint8_t curbyte,ctr,masklo;
uint8_t sreg_prev;
ws2812_DDRREG |= maskhi; // Enable output
masklo =~maskhi&ws2812_PORTREG;
maskhi |= ws2812_PORTREG;
sreg_prev=SREG;
#ifdef interrupt_is_disabled
cli();
#endif
while (datlen--) {
curbyte=*data++;
asm volatile(
" ldi %0,8 \n\t"
#ifndef interrupt_is_disabled
" clt \n\t"
#endif
"loop%=: \n\t"
" out %2,%3 \n\t" // '1' [01] '0' [01] - re
#if (w1_nops&1)
w_nop1
#endif
#if (w1_nops&2)
w_nop2
#endif
#if (w1_nops&4)
w_nop4
#endif
#if (w1_nops&8)
w_nop8
#endif
#if (w1_nops&16)
w_nop16
#endif
" sbrs %1,7 \n\t" // '1' [03] '0' [02]
" out %2,%4 \n\t" // '1' [--] '0' [03] - fe-low
" lsl %1 \n\t" // '1' [04] '0' [04]
#if (w2_nops&1)
w_nop1
#endif
#if (w2_nops&2)
w_nop2
#endif
#if (w2_nops&4)
w_nop4
#endif
#if (w2_nops&8)
w_nop8
#endif
#if (w2_nops&16)
w_nop16
#endif
" out %2,%4 \n\t" // '1' [+1] '0' [+1] - fe-high
#if (w3_nops&1)
w_nop1
#endif
#if (w3_nops&2)
w_nop2
#endif
#if (w3_nops&4)
w_nop4
#endif
#if (w3_nops&8)
w_nop8
#endif
#if (w3_nops&16)
w_nop16
#endif
" dec %0 \n\t" // '1' [+2] '0' [+2]
" brne loop%=\n\t" // '1' [+3] '0' [+4]
: "=&d" (ctr)
: "r" (curbyte), "I" (_SFR_IO_ADDR(ws2812_PORTREG)), "r" (maskhi), "r" (masklo)
);
}
SREG=sreg_prev;
}

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firmware/lib/light_ws2812.h Normal file
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/*
* light weight WS2812 lib include
*
* Version 2.3 - Nev 29th 2015
* Author: Tim (cpldcpu@gmail.com)
*
* Please do not change this file! All configuration is handled in "ws2812_config.h"
*
* License: GNU GPL v2+ (see License.txt)
+
*/
#ifndef LIGHT_WS2812_H_
#define LIGHT_WS2812_H_
#include <avr/io.h>
#include <avr/interrupt.h>
///////////////////////////////////////////////////////////////////////
// Define Reset time in µs.
//
// This is the time the library spends waiting after writing the data.
//
// WS2813 needs 300 µs reset time
// WS2812 and clones only need 50 µs
//
///////////////////////////////////////////////////////////////////////
#if !defined(ws2812_resettime)
#define ws2812_resettime 300
#endif
///////////////////////////////////////////////////////////////////////
// Define I/O pin
///////////////////////////////////////////////////////////////////////
#if !defined(ws2812_port)
#define ws2812_port D // Data port
#endif
#if !defined(ws2812_pin)
#define ws2812_pin 5 // Data out pin
#endif
/*
* Structure of the LED array
*
* cRGB: RGB for WS2812S/B/C/D, SK6812, SK6812Mini, SK6812WWA, APA104, APA106
* cRGBW: RGBW for SK6812RGBW
*/
struct cRGB { uint8_t g; uint8_t r; uint8_t b; };
struct cRGBW { uint8_t g; uint8_t r; uint8_t b; uint8_t w;};
/* User Interface
*
* Input:
* ledarray: An array of GRB data describing the LED colors
* number_of_leds: The number of LEDs to write
* pinmask (optional): Bitmask describing the output bin. e.g. _BV(PB0)
*
* The functions will perform the following actions:
* - Set the data-out pin as output
* - Send out the LED data
* - Wait 50µs to reset the LEDs
*/
void ws2812_setleds (struct cRGB *ledarray, uint16_t number_of_leds);
void ws2812_setleds_pin (struct cRGB *ledarray, uint16_t number_of_leds,uint8_t pinmask);
void ws2812_setleds_rgbw(struct cRGBW *ledarray, uint16_t number_of_leds);
/*
* Old interface / Internal functions
*
* The functions take a byte-array and send to the data output as WS2812 bitstream.
* The length is the number of bytes to send - three per LED.
*/
void ws2812_sendarray (uint8_t *array,uint16_t length);
void ws2812_sendarray_mask(uint8_t *array,uint16_t length, uint8_t pinmask);
/*
* Internal defines
*/
#if !defined(CONCAT)
#define CONCAT(a, b) a ## b
#endif
#if !defined(CONCAT_EXP)
#define CONCAT_EXP(a, b) CONCAT(a, b)
#endif
#define ws2812_PORTREG CONCAT_EXP(PORT,ws2812_port)
#define ws2812_DDRREG CONCAT_EXP(DDR,ws2812_port)
#endif /* LIGHT_WS2812_H_ */

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#include "mma8653.h"
#include <util/twi.h>
#define AXL_ADDR 0x1D
#define AXL_ERR_RET(e) if(1){err = e; goto err;}
#define TRY(c) if(1){ret = c; if (ret) return c;}
static int mma8653_i2c_transfer(int write, uint8_t reg, uint8_t *data, uint8_t length)
{
int err = 0;
// WRITE TARGET REGISTER
// Send start
TWCR = (1<<TWINT) | (1<<TWSTA) | (1 << TWEN);
while (!(TWCR & (1<<TWINT)));
if ((TWSR & 0xF8) != TW_START)
AXL_ERR_RET(1);
// Send device address
TWDR = (AXL_ADDR << 1);
TWCR = (1<<TWINT) | (1<<TWEN);
while (!(TWCR & (1<<TWINT)));
if ((TWSR & 0xF8) != TW_MT_SLA_ACK)
AXL_ERR_RET(2);
// Write register address
TWDR = reg;
TWCR = (1<<TWINT) | (1<<TWEN);
while (!(TWCR & (1<<TWINT)));
if ((TWSR & 0xF8) != TW_MT_DATA_ACK)
AXL_ERR_RET(3);
if (!write) {
// Get data
// Send re-start
TWCR = (1<<TWINT) | (1<<TWSTA) | (1 << TWEN);
while (!(TWCR & (1<<TWINT)));
if ((TWSR & 0xF8) != TW_REP_START)
AXL_ERR_RET(4);
// Command a read cycle
TWDR = (AXL_ADDR << 1) | (!write);
TWCR = (1<<TWINT) | (1<<TWEN);
while (!(TWCR & (1<<TWINT)));
if ((TWSR & 0xF8) != (write ? TW_MT_SLA_ACK : TW_MR_SLA_ACK))
AXL_ERR_RET(5);
}
while (length--) {
if (write) {
TWDR = *(data++);
TWCR = (1<<TWINT) | (1<<TWEN);
while (!(TWCR & (1<<TWINT)));
if ((TWSR & 0xF8) != TW_MT_DATA_ACK)
AXL_ERR_RET(6);
} else {
// Read byte
TWCR = (1<<TWINT) | (1<<TWEN) | ( (length != 0) << TWEA);
while (!(TWCR & (1<<TWINT)));
if ((TWSR & 0xF8) != (length != 0 ? TW_MR_DATA_ACK : TW_MR_DATA_NACK))
AXL_ERR_RET(6);
*(data++) = TWDR;
}
}
// Send stop
TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);
while (TWCR & (1<<TWSTO));
return 0;
err:
TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO); // Send stop to abort
return err;
}
static inline int mma8653_i2c_write(uint8_t reg, uint8_t value)
{
return mma8653_i2c_transfer(1, reg, &value, 1);
}
int mma8653_init() {
int ret;
TWBR = 0xff;
//TWSR = 3;
TRY(mma8653_i2c_write(0x2A, (1 << 1) | (1 << 0)));
TRY(mma8653_i2c_write(0x2B, (1 << 7))); // Test mode en
return 0;
}
int mma8653_get_measurements(struct axl_result *measurements) {
int ret;
int8_t buffer[4];
TRY(mma8653_i2c_transfer(0, 0x0, (uint8_t*) buffer, 4));
measurements->x = buffer[1];
measurements->y = buffer[2];
measurements->z = buffer[3];
return 0;
}

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#ifndef _MMA8653_H
#define _MMA8653_H
#include "light_ws2812.h"
struct axl_result {
int x, y, z;
};
int mma8653_init();
int mma8653_get_measurements(struct axl_result *measurements);
#endif

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firmware/lib/pm.c Normal file
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#include "pm.h"
#include <avr/io.h>
#include <util/delay.h>
#include <avr/sleep.h>
#include <avr/interrupt.h>
void pm_reset()
{
DDRB = 0;
DDRC = 0;
DDRD = 0;
PORTB = 0;
PORTC = 0;
PORTD = 0;
GICR = 0;
// Reset to bootloader
WDTCR = (1 << WDE) | (1 << WDP2);
while(1);
/*
// Reset to application
asm("ldi R16,0x00");
asm("push R16");
asm("push R16");
asm("push R16");
asm("push R16");
asm("ret");
while (1);
*/
}
void pm_axl_on()
{
HAL_ON(AXL_EN);
}
void pm_axl_off()
{
HAL_OFF(AXL_EN);
}
void pm_init()
{
cli();
HAL_INIT(VBUS_SENSE, INPUT, OFF); // USB connected indicator
HAL_INIT(VLED_EN_N, OUTPUT, OFF_N); // VLED DCDC converter enable
HAL_INIT(CHG_ACTIVE_N, INPUT, ON); // Battery charging status input
HAL_INIT(BAT_SENSE, INPUT, OFF); // No pull-up on Batt sense ADC input
HAL_INIT(BAT_SENSE_EN_N, INPUT, OFF); // Disable using High-Z
HAL_INIT(AXL_EN, OUTPUT, OFF); // Turn off AXL
HAL_INIT(AXL_I2C, INPUT, OFF); // No Pull-ups on I2C
// Hardware bug after sleep. Need to manually turn off->on I2C transceiver.
TWCR &= ~((1 << TWSTO) | (1 << TWEN));
sei();
}
void pm_disable_periphery()
{
cli();
// Turn off HW
TCCR1B = 0;
TIMSK = 0;
WDTCR = 0;
TWCR = 0;
SPCR = 0;
ADCSRA = 0;
DDRB = 0;
DDRC = 0;
DDRD = 0;
PORTB = 0;
PORTC = 0;
PORTD = 0;
}
void pm_suspend()
{
pm_disable_periphery();
// Activate wake from button
HAL_INIT(BUTTON_N, INPUT, ON); // Pull-up for user button
MCUCR = (1 << SM1) | (1 << SE);
sei();
sleep_cpu();
cli();
}
void pm_led_on_auto()
{
if (pm_ac_connected())
pm_led_off();
else
pm_led_on();
}
void pm_led_on()
{
HAL_ON_N(VLED_EN_N);
}
void pm_led_off()
{
HAL_OFF_N(VLED_EN_N);
}
int pm_ac_connected()
{
return HAL_ASSERTED(VBUS_SENSE);
}
int pm_charging()
{
return HAL_ASSERTED_N(CHG_ACTIVE_N);
}

22
firmware/lib/pm.h Normal file
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#ifndef _PM_H
#define _PM_H
#include "hal.h"
void pm_reset();
void pm_init();
void pm_suspend();
void pm_axl_on();
void pm_axl_off();
void pm_led_on();
void pm_led_off();
void pm_led_on_auto();
int pm_ac_connected();
int pm_charging();
void pm_disable_periphery();
#endif

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firmware/lib/system.c Normal file
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#include <avr/io.h>
#include <util/delay.h>
#include <string.h>
#include <stdlib.h>
#include "system.h"
#include "pm.h"
extern void app_init();
extern enum app_return app_mainloop();
struct cRGB led[STRIPLEN];
void display_update() {
ws2812_setleds(led, STRIPLEN);
}
void display_clear() {
memset(led, 0, STRIPLEN * 3);
}
void system_init()
{
pm_disable_periphery();
button_init();
TIFR = 0xFF; // Clear all interrupt flags
pm_init();
pm_axl_on();
_delay_ms(50);
mma8653_init();
while (HAL_ASSERTED_N(BUTTON_N)) // Prevent boot while button is pressed
_delay_ms(25);
timers_init();
}
enum BOOT_COLOR {RED, BLUE, GREEN};
void boot_animation(enum BOOT_COLOR color_offset)
{
_delay_ms(10);
display_clear();
for(int i = 0; i<STRIPLEN; ++i) {
*(&led[i].r + color_offset) = 0x10;
display_update();
_delay_ms(15);
*(&led[i].r + color_offset) = 0x0;
}
display_update();
_delay_ms(10);
}
void system_boot()
{
system_init();
pm_led_on_auto();
boot_animation(GREEN);
app_init();
}
int main()
{
enum app_return ar;
system_boot();
while (1) {
while (1) {
ar = app_mainloop();
if (ar != RUN)
break;
// TODO: Handle reset instead of suspend
// TODO: wdt reset
}
boot_animation(RED);
pm_suspend();
system_boot();
}
pm_reset();
}
void systick_cb()
{
pm_led_on_auto(); // Turn off LED DC-DC converter when USB power is connected
button_systick_cb();
}

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firmware/lib/system.h Normal file
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#ifndef _SYSTEM_H
#define _SYSTEM_H
#include "light_ws2812.h"
#include "mma8653.h"
#include "timers.h"
#include "button.h"
#define STRIPLEN (6*9)
extern struct cRGB led[STRIPLEN];
void display_update();
void display_clear();
enum app_return {RUN, SUSPEND, RESET};
#endif // _SYSTEM_H

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firmware/lib/timers.c Normal file
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#include "timers.h"
#include <avr/io.h>
#include <avr/interrupt.h>
extern void systick_cb();
volatile uint16_t timer[TIMERS_COUNT];
void timers_init() {
// Configure Systick
TCCR1B = (1 << CS11) | (1 << CS10) | (1 << WGM12); // CLKio / 64, CTC
OCR1A = 250 * SYSTICK_MS;
TIMSK = (1 << OCIE1A);
}
uint8_t block_for(uint8_t channel, uint16_t time_systicks)
{
if (timer_expired(channel)) {
timer_set(channel, time_systicks);
return 1;
}
return 0;
}
ISR (TIMER1_COMPA_vect)
{
uint8_t i;
for (i = 0; i < TIMERS_COUNT; ++i) {
if (timer[i] != 0) {
timer[i]--;
}
}
systick_cb();
}

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firmware/lib/timers.h Normal file
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#ifndef _TIMERS_H
#define _TIMERS_H
#include <stdint.h>
#define SYSTICK_MS 1 // Systick interval in ms
enum TIMERS{TIMER_BUTTON,
TIMER_APP0,
TIMER_APP1,
TIMERS_COUNT};
extern volatile uint16_t timer[TIMERS_COUNT];
#define timer_ms(ms) (ms / SYSTICK_MS)
#define timer_set(channel, time_systicks) if (1) {timer[channel] = time_systicks;}
#define timer_expired(channel) (timer[channel] == 0)
void timers_init();
uint8_t block_for(uint8_t channel, uint16_t time_systicks);
#endif // _TIMERS_H