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lcd_hd44780: Make sure nsecs_to_ticks() is always inlined

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It is a compile-time calculation that needs to be inlined to work.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2025-04-17 12:05:26 -04:00
parent 3656006a30
commit cb6828ec34
1 changed files with 6 additions and 6 deletions
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12
src/lcd_hd44780.c
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@ -23,19 +23,19 @@ struct hd44780 {
* Transmit functions
****************************************************************/
static uint32_t
static __always_inline uint32_t
nsecs_to_ticks(uint32_t ns)
{
return timer_from_us(ns * 1000) / 1000000;
}
static inline void
ndelay(uint32_t nsecs)
static void
ndelay(uint32_t ticks)
{
if (CONFIG_MACH_AVR)
// Slower MCUs don't require a delay
return;
uint32_t end = timer_read_time() + nsecs_to_ticks(nsecs);
uint32_t end = timer_read_time() + ticks;
while (timer_is_before(timer_read_time(), end))
irq_poll();
}
@ -54,7 +54,7 @@ hd44780_xmit_bits(uint8_t toggle, struct gpio_out e, struct gpio_out d4
gpio_out_toggle(d6);
if (toggle & 0x80)
gpio_out_toggle(d7);
ndelay(230);
ndelay(nsecs_to_ticks(230));
gpio_out_toggle(e);
}
@ -65,7 +65,7 @@ hd44780_xmit_byte(struct hd44780 *h, uint8_t data)
struct gpio_out e = h->e, d4 = h->d4, d5 = h->d5, d6 = h->d6, d7 = h->d7;
hd44780_xmit_bits(h->last ^ data, e, d4, d5, d6, d7);
h->last = data << 4;
ndelay(500 - 230);
ndelay(nsecs_to_ticks(500 - 230));
hd44780_xmit_bits(data ^ h->last, e, d4, d5, d6, d7);
}