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#include "project.h"
#define NCS (GPIO7)
#define NCS_PORT GPIOG
#define SCK (GPIO3)
#define SCK_PORT GPIOB
#define MOSI (GPIO5)
#define MOSI_PORT GPIOB
static void
set (int sck, int ncs, int mosi)
{
if (sck)
SET (SCK);
else
CLEAR (SCK);
if (ncs)
SET (NCS);
else
CLEAR (NCS);
if (mosi)
SET (MOSI);
else
CLEAR (MOSI);
// delay_us(1);
//delay_us(10);
}
static void
spip_send_8 (uint8_t wot)
{
int i;
for (i = 0; i < 8; ++i) {
set (0, 0, wot & 0x80);
set (1, 0, wot & 0x80);
set (0, 0, wot & 0x80);
wot <<= 1;
}
}
static int mutex = 0;
static int
lock (void)
{
if (__sync_add_and_fetch (&mutex, 1) != 1) {
__sync_sub_and_fetch (&mutex, 1);
return -1;
}
return 0;
}
static void
unlock (void)
{
__sync_sub_and_fetch (&mutex, 1);
}
static void
write_reg (uint8_t reg, uint8_t data)
{
while (lock());
set (0, 1, 0);
set (0, 0, 0);
spip_send_8 (reg);
spip_send_8 (data);
spip_send_8 (reg);
spip_send_8 (data);
spip_send_8 (reg);
spip_send_8 (data);
set (0, 0, 0);
set (0, 1, 0);
unlock();
}
static void
write_regs (uint8_t reg, uint8_t data1, uint8_t data2, uint8_t data3)
{
while (lock());
set (0, 1, 0);
set (0, 0, 0);
spip_send_8 (reg);
spip_send_8 (data3);
spip_send_8 (reg);
spip_send_8 (data2);
spip_send_8 (reg);
spip_send_8 (data1);
set (0, 0, 0);
set (0, 1, 0);
unlock();
}
static void write_triad (uint8_t reg, int d1, int d2, int d3, unsigned dm)
{
write_regs (reg++, (d1 % 10) | ((dm & 0x1) ? 0x80 : 0), (d2 % 10) | ((dm & 0x4) ? 0x80 : 0), (d3 % 10) | ((dm & 0x10) ? 0x80 : 0));
write_regs (reg, (d1 / 10) | ((dm & 0x2) ? 0x80 : 0), (d2 / 10) | ((dm & 0x8) ? 0x80 : 0), (d3 / 10) | ((dm & 0x20) ? 0x80 : 0));
}
#if 0
static void st_test (void)
{
UTC u = { 0 };
double local_lon = 0.0;
ST st;
double ra;
// LEDS: 12.13.28.00 01.01.29.05 13.27.42.05
u.year = 2021;
u.month = 1;
u.mday = 12;
u.hour = 13;
u.minute = 28;
ra = time_utc_to_ra (u);
st = time_ra_to_st (ra + local_lon);
printf ("%d:%02d:%02d\n", st.hour, st.minute, st.second);
st = time_utc_to_lst (u, local_lon);
printf ("%d:%02d:%02d\n", st.hour, st.minute, st.second);
for (;;);
}
#endif
unsigned fix_dots, fix_dots_even;
void max7219_report_fix (char fix, char fix2)
{
fix_dots = 0;
if (fix == 'L')
fix_dots |= 0x1;
if (fix2 == 'D') fix_dots |= 0x4;
if (fix == 'T') fix_dots |= 0x11;
}
void max7219_report_svin (int valid, int active)
{
fix_dots_even = 0;
if (active || valid) fix_dots_even |= 0x10;
}
void max7219_dispatch (void)
{
uint32_t now = HW_CLOCK_REG;
uint64_t abs = abs_extend (now);
static unsigned m;
EPOCH e;
UTC u;
UTC gu;
ST l;
unsigned last_dots;
e = pll_decompose (abs);
u = time_epoch_to_utc (e);
l = time_utc_to_lst (u, gps_lon);
e.s += gps_utc_diff;
gu = time_epoch_to_utc (e);
last_dots = fix_dots;
if (u.nanosecond < 500000000) last_dots |= fix_dots_even;
write_triad (1, u.nanosecond / 10000000, l.nanosecond / 10000000, gu.second, last_dots);
write_triad (3, u.second, l.second, gu.minute, 0x15);
write_triad (5, u.minute, l.minute, gu.hour, 0x15);
write_triad (7, u.hour, l.hour, gps_wday, 0x15);
if (u.minute == m) return;
m = u.minute;
printf ("LEDS: %02d.%02d.%02d.%02d %02d.%02d.%02d.%02d %02d.%02d.%02d.%02d lon %.6f\r\n",
u.hour, u.minute, u.second,
u.nanosecond / 10000000,
l.hour,
l.minute,
l.second,
l.nanosecond / 10000000,
gps_wday,
gu.hour,
gu.minute,
gu.second,
gps_lon);
}
void
max7219_init (int on, int brightness)
{
MAP_OUTPUT_PP (SCK);
MAP_OUTPUT_PP (NCS);
MAP_OUTPUT_PP (MOSI);
set (0, 1, 0);
if (on) {
write_reg (0xc, 0x1); //Power up
write_reg (0xf, 0x0); //normal mode
write_reg (0x9, 0xff); //BCD decode
write_reg (0xb, 0x7); //8 digits
write_regs (0xa, brightness, brightness, brightness);
} else {
write_reg (0xc, 0x0); //Power up
}
}
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