neorv32_neoled.h File Reference

Smart LED Interface (NEOLED) HW driver header file. More...

#include <stdint.h>

Go to the source code of this file.

Data Structures
struct	neorv32_neoled_t

Functions
void	neorv32_neoled_write_nonblocking (uint32_t data)
Prototypes
int	neorv32_neoled_available (void)
void	neorv32_neoled_setup (uint32_t prsc, uint32_t t_total, uint32_t t_high_zero, uint32_t t_high_one, int irq_mode)
void	neorv32_neoled_setup_ws2812 (int irq_mode)
void	neorv32_neoled_set_mode (uint32_t mode)
void	neorv32_neoled_strobe_blocking (void)
void	neorv32_neoled_strobe_nonblocking (void)
void	neorv32_neoled_enable (void)
void	neorv32_neoled_disable (void)
void	neorv32_neoled_write_blocking (uint32_t data)
uint32_t	neorv32_neoled_get_buffer_size (void)

IO Device: Smart LED Hardware Interface (NEOLED)
#define	NEORV32_NEOLED   ((neorv32_neoled_t*) (NEORV32_NEOLED_BASE))
enum	NEORV32_NEOLED_CTRL_enum {   NEOLED_CTRL_EN = 0 , NEOLED_CTRL_MODE = 1 , NEOLED_CTRL_STROBE = 2 , NEOLED_CTRL_PRSC0 = 3 ,   NEOLED_CTRL_PRSC1 = 4 , NEOLED_CTRL_PRSC2 = 5 , NEOLED_CTRL_BUFS_0 = 6 , NEOLED_CTRL_BUFS_1 = 7 ,   NEOLED_CTRL_BUFS_2 = 8 , NEOLED_CTRL_BUFS_3 = 9 , NEOLED_CTRL_T_TOT_0 = 10 , NEOLED_CTRL_T_TOT_1 = 11 ,   NEOLED_CTRL_T_TOT_2 = 12 , NEOLED_CTRL_T_TOT_3 = 13 , NEOLED_CTRL_T_TOT_4 = 14 , NEOLED_CTRL_T_ZERO_H_0 = 15 ,   NEOLED_CTRL_T_ZERO_H_1 = 16 , NEOLED_CTRL_T_ZERO_H_2 = 17 , NEOLED_CTRL_T_ZERO_H_3 = 18 , NEOLED_CTRL_T_ZERO_H_4 = 19 ,   NEOLED_CTRL_T_ONE_H_0 = 20 , NEOLED_CTRL_T_ONE_H_1 = 21 , NEOLED_CTRL_T_ONE_H_2 = 22 , NEOLED_CTRL_T_ONE_H_3 = 23 ,   NEOLED_CTRL_T_ONE_H_4 = 24 , NEOLED_CTRL_IRQ_CONF = 27 , NEOLED_CTRL_TX_EMPTY = 28 , NEOLED_CTRL_TX_HALF = 29 ,   NEOLED_CTRL_TX_FULL = 30 , NEOLED_CTRL_TX_BUSY = 31 }

Detailed Description

Smart LED Interface (NEOLED) HW driver header file.

Note

These functions should only be used if the NEOLED unit was synthesized (IO_NEOLED_EN = true).

See also

https://stnolting.github.io/neorv32/sw/files.html

Macro Definition Documentation

NEORV32_NEOLED

#define NEORV32_NEOLED   ((neorv32_neoled_t*) (NEORV32_NEOLED_BASE))

NEOLED module hardware access (neorv32_neoled_t)

Enumeration Type Documentation

NEORV32_NEOLED_CTRL_enum

enum NEORV32_NEOLED_CTRL_enum

NEOLED control register bits

Enumerator
NEOLED_CTRL_EN	NEOLED control register(0) (r/w): NEOLED global enable
NEOLED_CTRL_MODE	NEOLED control register(1) (r/w): TX mode (0=24-bit, 1=32-bit)
NEOLED_CTRL_STROBE	NEOLED control register(2) (r/w): Strobe (0=send normal data, 1=send RESET command on data write)
NEOLED_CTRL_PRSC0	NEOLED control register(3) (r/w): Clock prescaler select bit 0 (pulse-clock speed select)
NEOLED_CTRL_PRSC1	NEOLED control register(4) (r/w): Clock prescaler select bit 1 (pulse-clock speed select)
NEOLED_CTRL_PRSC2	NEOLED control register(5) (r/w): Clock prescaler select bit 2 (pulse-clock speed select)
NEOLED_CTRL_BUFS_0	NEOLED control register(6) (r/-): log2(tx buffer size) bit 0
NEOLED_CTRL_BUFS_1	NEOLED control register(7) (r/-): log2(tx buffer size) bit 1
NEOLED_CTRL_BUFS_2	NEOLED control register(8) (r/-): log2(tx buffer size) bit 2
NEOLED_CTRL_BUFS_3	NEOLED control register(9) (r/-): log2(tx buffer size) bit 3
NEOLED_CTRL_T_TOT_0	NEOLED control register(10) (r/w): pulse-clock ticks per total period bit 0
NEOLED_CTRL_T_TOT_1	NEOLED control register(11) (r/w): pulse-clock ticks per total period bit 1
NEOLED_CTRL_T_TOT_2	NEOLED control register(12) (r/w): pulse-clock ticks per total period bit 2
NEOLED_CTRL_T_TOT_3	NEOLED control register(13) (r/w): pulse-clock ticks per total period bit 3
NEOLED_CTRL_T_TOT_4	NEOLED control register(14) (r/w): pulse-clock ticks per total period bit 4
NEOLED_CTRL_T_ZERO_H_0	NEOLED control register(15) (r/w): pulse-clock ticks per ZERO high-time bit 0
NEOLED_CTRL_T_ZERO_H_1	NEOLED control register(16) (r/w): pulse-clock ticks per ZERO high-time bit 1
NEOLED_CTRL_T_ZERO_H_2	NEOLED control register(17) (r/w): pulse-clock ticks per ZERO high-time bit 2
NEOLED_CTRL_T_ZERO_H_3	NEOLED control register(18) (r/w): pulse-clock ticks per ZERO high-time bit 3
NEOLED_CTRL_T_ZERO_H_4	NEOLED control register(19) (r/w): pulse-clock ticks per ZERO high-time bit 4
NEOLED_CTRL_T_ONE_H_0	NEOLED control register(20) (r/w): pulse-clock ticks per ONE high-time bit 0
NEOLED_CTRL_T_ONE_H_1	NEOLED control register(21) (r/w): pulse-clock ticks per ONE high-time bit 1
NEOLED_CTRL_T_ONE_H_2	NEOLED control register(22) (r/w): pulse-clock ticks per ONE high-time bit 2
NEOLED_CTRL_T_ONE_H_3	NEOLED control register(23) (r/w): pulse-clock ticks per ONE high-time bit 3
NEOLED_CTRL_T_ONE_H_4	NEOLED control register(24) (r/w): pulse-clock ticks per ONE high-time bit 4
NEOLED_CTRL_IRQ_CONF	NEOLED control register(27) (r/w): TX FIFO interrupt: 1=IRQ if FIFO is empty, 1=IRQ if FIFO is less than half-full
NEOLED_CTRL_TX_EMPTY	NEOLED control register(28) (r/-): TX FIFO is empty
NEOLED_CTRL_TX_HALF	NEOLED control register(29) (r/-): TX FIFO is at least half-full
NEOLED_CTRL_TX_FULL	NEOLED control register(30) (r/-): TX FIFO is full
NEOLED_CTRL_TX_BUSY	NEOLED control register(31) (r/-): busy flag

Function Documentation

neorv32_neoled_available()

int neorv32_neoled_available

(

void

)

Check if NEOLED unit was synthesized.

Returns

0 if NEOLED was not synthesized, 1 if NEOLED is available.

neorv32_neoled_disable()

void neorv32_neoled_disable

(

void

)

Disable NEOLED controller.

neorv32_neoled_enable()

void neorv32_neoled_enable

(

void

)

Enable NEOLED controller.

neorv32_neoled_get_buffer_size()

uint32_t neorv32_neoled_get_buffer_size

(

void

)

Get NEOLED hardware buffer size.

Returns

Number of entries in NEOLED TX buffer.

neorv32_neoled_set_mode()

void neorv32_neoled_set_mode

(

uint32_t

mode

)

Set NEOLED mode (24-bit RGB / 32-bit RGBW).

Parameters

[in]

mode

0 = 24-bit mode (RGB), 1 = 32-bit mode (RGBW)

neorv32_neoled_setup()

void neorv32_neoled_setup	(	uint32_t	prsc,
		uint32_t	t_total,
		uint32_t	t_high_zero,
		uint32_t	t_high_one,
		int	irq_mode )

Enable and configure NEOLED controller. The NEOLED control register bits are listed in NEORV32_NEOLED_CTRL_enum. This function performs a "raw" configuration (just configuring the according control register bit).

Parameters

[in]	prsc	Clock prescaler select (0..7). See NEORV32_CLOCK_PRSC_enum.
[in]	t_total	Number of pre-scaled clock ticks for total bit period (0..31).
[in]	t_high_zero	Number of pre-scaled clock ticks to generate high-time for sending a '0' (0..31).
[in]	t_high_one	Number of pre-scaled clock ticks to generate high-time for sending a '1' (0..31).
[in]	irq_mode	Interrupt condition (1=IRQ if FIFO is empty, 1=IRQ if FIFO is less than half-full).

neorv32_neoled_setup_ws2812()

void neorv32_neoled_setup_ws2812

(

int

irq_mode

)

Configure NEOLED controller for using WS2812 LEDs (NeoPixel-compatible). This function computes all the required timings and finally calls neorv32_neoled_setup.

Note

WS2812 timing: T_period = 1.2us, T_high_zero = 0.4us, T_high_one = 0.8us. Change the constants if required.

This function uses the SYSINFO_CLK value (from the SYSINFO HW module) to do the timing computations.

Parameters

[in]

irq_mode

Interrupt condition (1=IRQ if FIFO is empty, 1=IRQ if FIFO is less than half-full).

neorv32_neoled_strobe_blocking()

void neorv32_neoled_strobe_blocking

(

void

)

Send strobe command ("RESET") - blocking.

neorv32_neoled_strobe_nonblocking()

void neorv32_neoled_strobe_nonblocking

(

void

)

Send strobe command ("RESET") - non-blocking.

neorv32_neoled_write_blocking()

void neorv32_neoled_write_blocking

(

uint32_t

data

)

Send single RGB(W) data word to NEOLED module (blocking).

Warning

This function is blocking as it polls the NEOLED FIFO full flag.

Parameters

[in]

data

LSB-aligned 24-bit RGB or 32-bit RGBW data

neorv32_neoled_write_nonblocking()

void neorv32_neoled_write_nonblocking ( uint32_t data )

inline

Send single RGB(W) data word to NEOLED module (non-blocking).

Warning

This function uses NO busy/flag checks at all!

Parameters

[in]

data

LSB-aligned 24-bit RGB or 32-bit RGBW data