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usbasp.c
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usbasp.c
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/**
* @file usbasp.c
* ABSTRACT HERE <<
*
* $Id$
*
* (C) Copyright 2018 MadsenSoft, [email protected]
*/
#include <stdio.h>
#include <string.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h> /* needed by usbdrv.h */
#include "oddebug.h"
#include "usbdrv.h"
#include "util.h"
#define USBINTR_READSTR 1
#define USBCMD_INIT 0x01
#define USBCMD_SCROLL 0x02
#define USBCMD_FETCHSTR 0x03
#define USBCMD_SETDUTY 0x04
#define USBCMD_SETLED 0x10
#define USBCMD_LEDMASK 0x0F
#define USBCMD_NEXTCMD 0x20
#define LEDG_PIN SBIT(PORTC, PC1)
#define LEDG_OUT SBIT(DDRC, PC1)
#define LEDR_PIN SBIT(PORTC, PC0)
#define LEDR_OUT SBIT(DDRC, PC0)
#define LED0_PIN SBIT(PORTC, PC2)
#define LED0_OUT SBIT(DDRC, PC2)
#define LED1_PIN SBIT(PORTB, PB2)
#define LED1_OUT SBIT(DDRB, PB2)
#define LED2_PIN SBIT(PORTB, PB4)
#define LED2_OUT SBIT(DDRB, PB4)
#define LED3_PIN SBIT(PORTB, PB5)
#define LED3_OUT SBIT(DDRB, PB5)
#define BTN1_PIN SBIT(PINB, PB3)
#define BTN1_PU SBIT(PORTB, PB3)
#define BTN2_PIN SBIT(PIND, PD1)
#define BTN2_PU SBIT(PORTD, PD1)
#define BTN3_PIN SBIT(PIND, PD0)
#define BTN3_PU SBIT(PORTD, PD0)
#define TIMERRATE 10000
#define TIMERTOP F_CPU / TIMERRATE / 8
int initialised = 0;
u8 ledR = 1;
u8 ledG = 0;
u8 led1 = 0;
u8 led2 = 0;
u8 led3 = 0;
u8 ledDuty = 5;
int deciMilli = 0;
u32 milliSecs = 0;
char *usbStr;
u8 intrSeq = 0;
u8 cmd[4];
void usbSendIntr(void)
{
usbSetInterrupt(cmd, 4);
}
int usbIntr(char *s, u8 btn, u8 chg)
{
usbStr = s;
intrSeq = milliSecs % 1250 / 5 + 1;
cmd[0] = USBINTR_READSTR;
cmd[1] = intrSeq;
cmd[2] = btn;
cmd[3] = chg;
usbSendIntr();
return 0;
}
char str[90];
#define SPRINT(fmt, ...) (sprintf_P(str, PSTR(fmt "\r\n"), ##__VA_ARGS__), str)
//ISR(TIMER0_OVF_vect)
static void TIMER0_OVF(void)
{
deciMilli++;
TCNT0 -= TIMERTOP;
LEDR_PIN = deciMilli <= ledDuty && ledR ? 0 : 1;
LEDG_PIN = deciMilli <= ledDuty && ledG ? 0 : 1;
if (initialised) {
LED1_PIN = deciMilli <= ledDuty && led1 ? 1 : 0;
LED2_PIN = deciMilli <= ledDuty && led2 ? 1 : 0;
LED3_PIN = deciMilli <= ledDuty && led3 ? 1 : 0;
}
}
extern void setup(void)
{
milliSecs = 0;
TCCR0 = BIT(CS01); // Timer0 /8 clock prescaler
// SBIT(TIMSK, TOIE0) = 1; // Interrupts messes up v-usb. Handle from main loop
LEDG_OUT = 1;
LEDG_PIN = 1;
LEDR_OUT = 1;
LEDR_PIN = 1;
BTN1_PU = 1;
BTN2_PU = 1;
BTN3_PU = 1;
}
struct { u16 p1, p2; } ledCnt[4];
static void initPins()
{
memset(ledCnt, 0, sizeof(ledCnt));
ledR = 0;
LED0_OUT = 1;
LED1_OUT = 1;
LED2_OUT = 1;
LED3_OUT = 1;
LED0_PIN = 0;
LED1_PIN = 0;
LED2_PIN = 0;
LED3_PIN = 0;
initialised = 1;
}
int scrollMode = 0;
void handleLed()
{
if (!initialised)
return;
int m = 0, i;
if (scrollMode)
m = 1 << (milliSecs % 1000 / 250);
else {
for (i = 0; i < 4; i++) {
if (ledCnt[i].p1 == 1)
m |= 1 << i;
else if (ledCnt[i].p1 == 0)
;
else if (ledCnt[i].p2 == 0 && (milliSecs % (ledCnt[i].p1 * 2)) < ledCnt[i].p1)
m |= 1 << i;
else if (ledCnt[i].p2 != 0 && (milliSecs % (ledCnt[i].p1 + ledCnt[i].p2)) < ledCnt[i].p1)
m |= 1 << i;
}
}
LED0_PIN = m&1 ? 1:0;
led1 = m&2 ? 1:0;
led2 = m&4 ? 1:0;
led3 = m&8 ? 1:0;
}
// Handle buttons
i16 btnTime = 0;
u16 btnMask = 0;
u16 btnPrev = 0;
void handleButtons()
{
#if 0
if (!initialised)
return;
#endif
int i, mask;
for (i = 0, mask=0; i < 3; i++) {
int b;
switch (i) {
case 0: b = BTN1_PIN==0; break;
case 1: b = BTN2_PIN==0; break;
case 2: b = BTN3_PIN==0; break;
}
mask |= (b?1:0) << i;
}
if (mask != btnMask) {
btnMask = mask;
btnTime = milliSecs & 0xffff;
}
else if ((i16)(milliSecs & 0xffff) - btnTime > 50 && btnMask != btnPrev) {
int btnChng = btnMask ^ btnPrev;
usbIntr(SPRINT("BTN %d,%d,%d CHG %d,%d,%d", btnMask&1, (btnMask>>1)&1, (btnMask>>2)&1,
btnChng&1, (btnChng>>1)&1, (btnChng>>2)&1), btnMask, btnChng);
btnPrev = btnMask;
ledR = btnMask != 0;
if (!initialised) {
initPins();
ledCnt[0].p1 = 50;
ledCnt[0].p2 = 1950;
}
}
}
extern void repeat(void)
{
if (TIFR & BIT(TOV0)) {
TIMER0_OVF();
TIFR = BIT(TOV0); // When *not* an ISR. Clear by setting the bit
return;
}
int msIn = deciMilli;
if (deciMilli >= 10) {
deciMilli -= 10;
milliSecs++;
}
else {
return;
}
usbPoll();
if ( 0 == (milliSecs % 10) && intrSeq) {
usbSendIntr();
}
if (0 == (milliSecs % 500)) {
ledG = ~ledG;
}
handleButtons();
handleLed();
if (0 == (milliSecs % 5000)) {
usbIntr(SPRINT("HELLO %10lu %lu %hu %d/%d %d,%d,%d", milliSecs, btnMask, deciMilli, msIn,
ledCnt[0].p1, ledCnt[0].p2, (milliSecs % (ledCnt[0].p1 * 2))), 0, 0);
}
}
uchar usbFunctionSetup(u8 *setupData)
{
usbRequest_t *rq = (usbRequest_t *) setupData;
intrSeq = 0;
if (USBCMD_FETCHSTR == rq->bRequest) {
usbMsgPtr = (u8*)usbStr;
return strlen(usbStr);
}
else if (USBCMD_INIT == rq->bRequest) {
initPins();
}
else if (USBCMD_SCROLL == rq->bRequest) {
scrollMode = rq->wValue.word ? 1 : 0;
}
else if (USBCMD_SETDUTY == rq->bRequest) {
ledDuty = rq->wValue.bytes[1] * 0x100 + rq->wValue.bytes[0];
}
else if (USBCMD_SETLED == (rq->bRequest & ~USBCMD_LEDMASK)) {
int led = rq->bRequest & USBCMD_LEDMASK;
ledCnt[led].p1 = rq->wValue.bytes[1] * 0x100 + rq->wValue.bytes[0];
ledCnt[led].p2 = rq->wIndex.bytes[1] * 0x100 + rq->wIndex.bytes[0];
}
return 0;
}
int main() {
//odDebugInit();
uchar i, j;
cli();
usbDeviceDisconnect();
for (j = 0; --j;) {
for (i = 0; --i;)
;
}
usbDeviceConnect();
usbInit();
setup();
sei();
for (;;) {
repeat();
}
}
// vim: set sw=2 sts=2 et: