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tornado/fw/tornado.c: use LED_* to communicate with LED bar; update demo

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Instead of a counter, which worked okay with 16 LEDs but is useless with
all 64 of them, we now show a filling/emptying bar. The update speed is
high enough that rotation results in about a quarter-circle pattern.
This commit is contained in:
Werner Almesberger 2012-11-23 10:47:41 -03:00
parent 53b2df2683
commit 9447541679
1 changed files with 48 additions and 15 deletions
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53
tornado/fw/tornado.c
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@ -17,6 +17,8 @@
MASK(port, LED_DS) | MASK(port, LED_LCLK) | MASK(port, LED_SCLK))
#if 0
/*
* @@@ For testing, connect the LED bar via the 8:10 card slot, so that it
* can be disconnected without soldering.
@ -27,19 +29,33 @@
#define DS CARD_CLK
#define VDD CARD_CMD
#else
static void send(uint16_t pattern)
#define SCLK LED_SCLK
#define LCLK LED_LCLK
#define DS LED_DS
#endif
#define N_LEDS 64
static void send(uint8_t pattern[N_LEDS/8])
{
uint8_t i;
uint8_t i, j, mask;
for (i = 0; i != 16; i++) {
if (pattern & 0x8000)
for (i = 0; i != N_LEDS/8; i++) {
mask = 1;
for (j = 0; j != 8; j++) {
if (pattern[i] & mask)
SET(DS);
else
CLR(DS);
SET(SCLK);
CLR(SCLK);
pattern <<= 1;
mask <<= 1;
}
}
SET(LCLK);
CLR(LCLK);
@ -80,8 +96,9 @@ static uint16_t adc(bool x)
int main(void)
{
static uint8_t p[N_LEDS/8];
uint8_t mode = 0;
uint16_t n = 0;
uint16_t n = 0, v;
PORTB = HIGH(B);
PORTC = HIGH(C);
@ -97,8 +114,11 @@ int main(void)
OUT(LCLK);
OUT(DS);
#ifdef VDD
SET(VDD);
OUT(VDD);
#endif
while (1) {
while (!PIN(SW_SW));
@ -110,15 +130,28 @@ int main(void)
mode = 2;
switch (mode) {
case 1:
send(adc(0));
n = adc(0);
p[0] = n;
p[1] = n >> 8;
p[2] = p[3] = p[4] = p[5] = p[6] = p[7] = 0;
send(p);
break;
case 2:
send(adc(1));
n = adc(1);
p[0] = n;
p[1] = n >> 8;
p[2] = p[3] = p[4] = p[5] = p[6] = p[7] = 0;
send(p);
break;
default:
send(n);
v = 63-n;
if (n & 64)
p[(v >> 3) & 7] &= ~(1 << (v & 7));
else
p[(v >> 3) & 7] |= 1 << (v & 7);
send(p);
n++;
}
// _delay_ms(100);
_delay_ms(1);
}
}