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custom 74hc595 shifting #820

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custom 74hc595 shifting #820

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66 changes: 66 additions & 0 deletions uCNC/src/hal/mcus/esp8266/mcu_esp8266.c
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,68 @@ static FORCEINLINE void mcu_gen_oneshot(void)
}
#endif

#ifdef IC74HC595_CUSTOM_SHIFT_IO

#ifndef IC74HC595_COUNT
#define IC74HC595_COUNT 0
#endif

#ifndef IC74HC595_DATA
#define IC74HC595_DATA DOUT8
#endif

#ifndef IC74HC595_CLK
#define IC74HC595_CLK DOUT9
#endif

#ifndef IC74HC595_LATCH
#define IC74HC595_LATCH DOUT10
#endif

#ifndef IC74HC595_DELAY_CYCLES
#define IC74HC595_DELAY_CYCLES 0
#endif

IRAM_ATTR void esp8266_ic74hc595_shift_io_pins(void)
{
uint8_t pins[IC74HC595_COUNT];
__ATOMIC__
{
memcpy(pins, (const void *)ic74hc595_io_pins, IC74HC595_COUNT);
mcu_clear_output(IC74HC595_LATCH);
for (uint8_t i = IC74HC595_COUNT; i != 0;)
{
i--;
#if (defined(IC74HC595_USE_HW_SPI) && defined(MCU_HAS_SPI))
mcu_spi_xmit(pins[i]);
#else
uint8_t pinbyte = pins[i];
for (uint8_t j = 0x80; j != 0; j >>= 1)
{
#if (IC74HC595_DELAY_CYCLES)
ic74hc595_delay();
#endif
mcu_clear_output(IC74HC595_CLK);
if (pinbyte & j)
{
mcu_set_output(IC74HC595_DATA);
}
else
{
mcu_clear_output(IC74HC595_DATA);
}
mcu_set_output(IC74HC595_CLK);
}
#endif
}
#if (IC74HC595_DELAY_CYCLES)
ic74hc595_delay();
#endif
mcu_set_output(IC74HC595_LATCH);
}
}
#endif

#if SERVOS_MASK > 0
static uint32_t servo_tick_counter = 0;
static uint32_t servo_tick_alarm = 0;
Expand Down Expand Up @@ -263,8 +325,12 @@ IRAM_ATTR void mcu_itp_isr(void)
mcu_gen_pwm_and_servo();
mcu_gen_oneshot();
#if defined(IC74HC595_HAS_STEPS) || defined(IC74HC595_HAS_DIRS) || defined(IC74HC595_HAS_PWMS) || defined(IC74HC595_HAS_SERVOS)
#ifdef IC74HC595_CUSTOM_SHIFT_IO
esp8266_ic74hc595_shift_io_pins();
#else
ic74hc595_shift_io_pins();
#endif
#endif
}

// static void mcu_uart_isr(void *arg)
Expand Down
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