hal_npdata_transfer.c File Reference

#include <stdlib.h>
#include <stdbool.h>
#include <stdint.h>
#include "hal_data.h"
#include "hal_device.h"
#include "hal_tasks.h"
#include "pixelkey.h"
#include "neopixel.h"
#include "config.h"
#include "hal_npdata_transfer.h"

Macros
#define	NPDATA_FRAME_IDX_DEFAULT   (0U)
	Default value for npdata_frame_idx.
#define	NPDATA_COLOR_BIT_DEFAULT   (NPDATA_SHIFT_REG_MASK)
	Default value for npdata_color_bit.
#define	NPDATA_SHIFT_REG_MASK   (UINT32_C(1) << (NEOPIXEL_COLOR_BITS - 1))
	Mask for selecting the current data bit when converting color bytes to timing data.

Functions
static void	push_data_to_buffer (uint32_t *const p_block)
	Push new data to the secondary (or primary) buffer. More...
static volatile uint32_t npdata_gpt_buffer[2][(8U)]	__attribute__ ((aligned(4)))
	GPT compare ping-pong buffer for generating NeoPixel timing waveforms.
volatile color_rgb_t *	npdata_frame_buffer_get (void)
	Gets a pointer to the frame buffer. More...
void	npdata_frame_send (void)
	Kicks off a frame transmission to the attached NeoPixels.
void	npdata_open (void)
	Opens the peripherals needed for data transmission to the NeoPixels.
void	npdata_color_set (uint32_t index, color_rgb_t const *const p_color)
	Copies a color to the specified index of the frame buffer. More...
transfer_status_t	npdata_status_get (void)
	Gets the current status of the NeoPixel data transfer. More...
ISR functions and callbacks
void	dmac0_repeat_isr (void)
	DMAC_INT ISR handler. More...
void	npdata_transfer_callback (dmac_callback_args_t *p_args)
	DMAC interrupt callback; unused. More...

Variables
volatile color_rgb_t	g_npdata_frame [(4U)] = {0}
	NeoPixel frame buffer.
static uint32_t	npdata_frame_cnt = 0
static uint32_t	npdata_frame_idx = (0U)
	Current NeoPixel index to write to the buffers.
static uint32_t	npdata_color_bit = ( (UINT32_C(1) << (NEOPIXEL_COLOR_BITS - 1)) )
	Current bit to write to the buffers.
static uint32_t	npdata_color_word = 0U
	Current full shift-register word for the color being written.
static uint32_t	npdata_b0_counts = 0
	Timer counts for the high period of a 0-bit.
static uint32_t	npdata_b1_counts = 0
	Timer counts for the high period of a 1-bit.