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working code (small crashes in communication still)

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Julian Daube 2019-02-13 00:05:52 +01:00 committed by Julian Daube
parent b7d4cbaa27
commit 8ea404c3fa
5 changed files with 110 additions and 184 deletions
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2
firmware/slider/SliderCommunication

@ -1 +1 @@
Subproject commit 3141a62e62012dee60192e6ad1c95ee5b63fc8ce Subproject commit 362c65440c49e09e06e89299d51a25003e9724a0

57
firmware/slider/adc.c
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@ -12,56 +12,25 @@
#include <avr/interrupt.h> #include <avr/interrupt.h>
// global adc instance // global adc instance
volatile adc_t adc; adc_t adc;
static inline void adc_next() {
do {
adc.current_channel = (adc.current_channel+1)%8;
if (!adc.current_channel) {
adc.current_sample = adc.buffer.ptr-1;
}
} while(!(adc.channel_mask & (1<<adc.current_channel)));
if (adc.current_sample < (adc.buffer.ptr + adc.buffer.size)) {
adc.current_sample++;
}
// set mux input
ADMUX = adc.current_channel;
}
/* adc driver */ /* adc driver */
void adc_init(adc_buffer_t buffer, uint8_t mask) { void adc_init(uint8_t * channels) {
if (!mask) {
return;
}
adc.buffer = buffer;
adc.current_sample = adc.buffer.ptr;
adc.channel_mask = mask;
adc.current_channel = 0; adc.current_channel = 0;
adc.channel_map = channels;
// find first channel ADMUX = channels[0];
while(!((1<<adc.current_channel) & mask)) { ADCSRA = (1<<ADATE) | (1<<ADEN) | 7; // enable adc, maximum prescaler value
adc.current_channel++;
} }
ADMUX = 0;
ADCSRA = (1<<ADATE) | (1<<ADEN) | 5 ; // enable adc, maximum prescaler value
}
void adc_start() {
ADCSRA |= (1<<ADIE) | (1<<ADSC); // enable adc interrupt
}
void adc_stop( ){
ADCSRA &= ~(1<<ADIE);
}
#include "led.h"
ISR(ADC_vect) { ISR(ADC_vect) {
**adc.current_sample = ADC; adc.buffer[adc.current_channel] = ADC;
adc_next(); adc.current_channel++;
if (adc.current_channel == ADC_BUFFER_SIZE) {
adc.current_channel = 0;
}
ADMUX = adc.channel_map[adc.current_channel];
} }

33
firmware/slider/adc.h
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@ -12,38 +12,25 @@
typedef uint16_t adc_sample_t; typedef uint16_t adc_sample_t;
#define ADC_BUFFER_SIZE 5
typedef struct { typedef struct {
adc_sample_t ** ptr;
uint8_t size;
} adc_buffer_t; } adc_buffer_t;
typedef struct adc { typedef struct adc {
adc_buffer_t buffer; adc_sample_t buffer[ADC_BUFFER_SIZE];
uint8_t current_channel; volatile uint8_t current_channel;
adc_sample_t ** current_sample; uint8_t * channel_map;
uint8_t channel_mask;
} adc_t; } adc_t;
// the adc instance // the adc instance
extern volatile adc_t adc; extern adc_t adc;
enum { void adc_init(uint8_t * channels);
ADC_CHANNEL_0 = 0x01,
ADC_CHANNEL_1 = 0x02,
ADC_CHANNEL_2 = 0x04,
ADC_CHANNEL_3 = 0x08,
ADC_CHANNEL_4 = 0x10,
ADC_CHANNEL_5 = 0x20,
ADC_CHANNEL_6 = 0x40,
ADC_CHANNEL_7 = 0x80,
ADC_CHANNEL_ALL = 0xFF,
};
#define adc_start() ADCSRA |= (1<<ADIE) | (1<<ADSC)
void adc_init(adc_buffer_t buffer, uint8_t channel_mask); #define adc_stop() ADCSRA &= ~(1<<ADIE)
void adc_start();
void adc_stop();
#endif /* ADC_H_ */ #endif /* ADC_H_ */

18
firmware/slider/led.h
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@ -15,17 +15,17 @@
#define LED_REG PORTB #define LED_REG PORTB
#define LED_PIN 0 #define LED_PIN 0
static inline void led_toggle() { #define led_toggle() do { \
LED_REG ^= (1<<LED_PIN); LED_REG ^= (1<<LED_PIN); \
} } while(0)
static inline void led_off() { #define led_off() do { \
LED_REG |= (1<<LED_PIN); LED_REG |= (1<<LED_PIN); \
} } while(0)
static inline void led_on() { #define led_on() do { \
LED_REG &= ~(1<<LED_PIN); LED_REG &= ~(1<<LED_PIN); \
} } while(0)
void led_init(); void led_init();

178
firmware/slider/main.c
View File

@ -12,106 +12,19 @@
#include <interface.h> #include <interface.h>
typedef struct {
byte_t * buffer_start, * buffer_end;
volatile byte_t * read;
volatile byte_t * write;
volatile byte_t count;
iface_t iface;
} comm_t;
comm_t comm;
void comm_write(iface_t * iface, byte_t byte) {
if ((comm.write == comm.read) && comm.count) {
// write overflow
return;
}
*comm.write = byte;
++comm.count;
// advance write pointer
if ((++comm.write) >= comm.buffer_end) {
comm.write = comm.buffer_start;
}
}
inline byte_t comm_read() {
if (!comm.count)
return 0x00;
byte_t result = *comm.read;
--comm.count;
if ((++comm.read) >= comm.buffer_end) {
comm.read = comm.buffer_start;
}
return result;
}
byte_t comm_buffer[10];
void comm_init()
{
comm.buffer_start = comm_buffer;
comm.buffer_end = comm_buffer + sizeof(comm_buffer);
// reset buffer
comm.write = comm.buffer_start;
comm.read = comm.buffer_start;
comm.count = 0;
// TODO: setup pins
DDRA |= (1<<PA5); // setup MOSI as output
// TODO: setup USART in synchronous mode
USICR = (1<<USIWM0)|(1<<USICS1);
// init interface
comm.iface.write = comm_write;
comm.iface.on_read = 0;
}
void comm_start()
{
// don't start without interrupt handler
if (!comm.iface.on_read)
return;
// TODO: activate USART
USICR |= (1<<USIOIE);
}
ISR(USI_OVF_vect)
{
cli();
// write buffer out if there is data to be written
//if (!comm.count) {
// call interrupt handler
//comm.iface.on_read(&comm.iface, USIDR, comm.iface.callback_data);
//}
USIDR = 0x02;
sei();
//USIDR = comm_read();
}
#include "main.h" #include "main.h"
void comm_init();
// the public instance of the app buffer // the public instance of the app buffer
struct app app = {}; struct app app = {};
adc_sample_t * channel_map[] = { uint8_t channel_map[ADC_BUFFER_SIZE] = {
// update app state (remap channels) 0,
&app.state.state.poti[2], 1,
&app.state.state.poti[3], 2,
&app.state.state.poti[1], 3,
&app.state.state.poti[0], 7
&app.state.state.slider
}; };
// initalizes the application modules // initalizes the application modules
@ -124,25 +37,80 @@ void init()
// init adc module // init adc module
// will sample 0x8F (CHANNEL 8 and 0-3) // will sample 0x8F (CHANNEL 8 and 0-3)
// this module also updates app.buffer.poti and slider for us // this module also updates app.buffer.poti and slider for us
adc_init((adc_buffer_t){ adc_init(channel_map);
.ptr = channel_map,
.size = sizeof(channel_map),
}, 0x8F);
// init communication module // init communication module
comm_init(); comm_init();
// bind state encoder to communication module
slave_init(&app.state, &comm.iface);
// start all modules // start all modules
adc_start(); adc_start();
comm_start();
// activate interrupts (effectivly starting the application) // activate interrupts (effectivly starting the application)
sei(); sei();
} }
void comm_init()
{
DDRA |= (1<<PA5); // setup MOSI as output
USICR = (1<<USIWM0)|(1<<USICS1);
}
volatile enum {
COMM_WAIT = 0,
COMM_SEND_START ,
COMM_SEND_WAIT ,
COMM_SEND_END ,
} comm_state;
static inline void comm_service()
{
static uint8_t count = 0;
static uint16_t temp = 0xFF;
if (USISR & (1<<USIOIF))
{
led_on();
cli();
switch(comm_state)
{
case COMM_WAIT:
if (IS_EOM(USIDR)) {
// pass package through
USIDR &= ~0x80;
comm_state = COMM_SEND_START;
adc_stop();
}
break;
case COMM_SEND_START:
temp = adc.buffer[count];
USIDR = temp & 0x7F;
comm_state = COMM_SEND_WAIT;
break;
case COMM_SEND_WAIT:
USIDR = (temp>>7)&0x7F;
if (++count == ADC_BUFFER_SIZE) {
comm_state = COMM_SEND_END;
} else {
comm_state = COMM_SEND_START;
}
break;
case COMM_SEND_END:
count = 0;
USIDR = app.state.state.button | 0x80;
default:
comm_state = COMM_WAIT;
adc_start();
break;
}
USISR |= (1<<USIOIF);
sei();
led_off();
}
}
#include <util/delay.h> #include <util/delay.h>
// little debug helper function // little debug helper function
@ -160,6 +128,8 @@ int main()
init(); init();
while(1) { while(1) {
// nothing to do here, the application is interrupt-driven // service serial interface
// slightly more stable then interrupt
comm_service();
} }
} }