57 lines
2.0 KiB
C
57 lines
2.0 KiB
C
#if !defined(__RPI_PIXLEDS_H__)
|
|
#define __RPI_PIXLEDS_H__
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "rpi_dma_utils.h"
|
|
|
|
#if PHYS_REG_BASE == PI_4_REG_BASE // Timings for RPi v4 (1.5 GHz)
|
|
#define SMI_TIMING 10, 15, 30, 15 // 400 ns cycle time
|
|
#else // Timings for RPi v0-3 (1 GHz)
|
|
#define SMI_TIMING 10, 10, 20, 10 // 400 ns cycle time
|
|
#endif
|
|
|
|
#define TX_TEST 0 // If non-zero, use dummy Tx data
|
|
#define LED_D0_PIN 8 // GPIO pin for D0 output
|
|
#define LED_NCHANS 8 // Number of LED channels (8 or 16)
|
|
#define LED_NBITS 24 // Number of data bits per LED
|
|
#define LED_PREBITS 4 // Number of zero bits before LED data
|
|
#define LED_POSTBITS 4 // Number of zero bits after LED data
|
|
#define BIT_NPULSES 3 // Number of O/P pulses per LED bit
|
|
#define CHAN_MAXLEDS 6 * 60 // Maximum number of LEDs per channel
|
|
#define CHASE_MSEC 20 // Delay time for chaser light test
|
|
#define REQUEST_THRESH 2 // DMA request threshold
|
|
#define DMA_CHAN 10 // DMA channel to use
|
|
|
|
// Length of data for 1 row (1 LED on each channel)
|
|
#define LED_DLEN (LED_NBITS * BIT_NPULSES)
|
|
|
|
// Transmit data type, 8 or 16 bits
|
|
#if LED_NCHANS > 8
|
|
#define TXDATA_T uint16_t
|
|
#else
|
|
#define TXDATA_T uint8_t
|
|
#endif
|
|
|
|
// Ofset into Tx data buffer, given LED number in chan
|
|
#define LED_TX_OSET(n) (LED_PREBITS + (LED_DLEN * (n)))
|
|
|
|
// Size of data buffers & NV memory, given number of LEDs per chan
|
|
#define TX_BUFF_LEN(n) (LED_TX_OSET(n) + LED_POSTBITS)
|
|
#define TX_BUFF_SIZE(n) (TX_BUFF_LEN(n) * sizeof(TXDATA_T))
|
|
#define VC_MEM_SIZE (PAGE_SIZE + TX_BUFF_SIZE(CHAN_MAXLEDS))
|
|
|
|
void test_leds();
|
|
int str_rgb(char *s, int rgbs[][LED_NCHANS], int chan);
|
|
void set_color(uint32_t rgb, TXDATA_T *txd);
|
|
void rgb_txdata(int *rgbs, TXDATA_T *txd);
|
|
void swap_bytes(void *data, int len);
|
|
int hexdig(char c);
|
|
void map_devices(void);
|
|
void fail(char *s);
|
|
void terminate_smi(int sig);
|
|
void init_smi(int ledChan, int ns, int setup, int hold, int strobe);
|
|
void setup_smi_dma(MEM_MAP *mp, int nsamp, TXDATA_T **txdata);
|
|
void start_smi(MEM_MAP *mp);
|
|
|
|
#endif // __RPI_PIXLEDS_H__
|