Cascaded led driver to write use write into leds[i] = 0x0 or 0xfff
Fork of TLC5940 by
TLC5940.cpp
- Committer:
- slisgrinder
- Date:
- 2013-03-22
- Revision:
- 1:05d2234c0965
- Parent:
- 0:1fb7b50d16b1
- Child:
- 2:ff6fc805f4ea
File content as of revision 1:05d2234c0965:
#include "TLC5940.h" int num_drivers = 1; void setup (SPI &driver, DigitalOut &vprg, DigitalOut &xlat, DigitalOut &blank, DigitalOut &dcprg, PwmOut &gsclk, int num_ics) { xlat = 0; // hold GS/DC data constant blank = 0; blank = 1; blank = 0; // Blank (squelch) all outputs dcprg = 1; // dcprg points DC data to DC register. vprg = 0; // sets drivers to GS mode. Set to 1 to change to DC mode gsclk.period_us (1); // set grayscale clock to 1000 Hz gsclk = 0.5; // turn on grayscale clock to 50% duty cycle at afore mentioned frequency if (num_ics <= 0) { num_drivers = 1; } else { num_drivers = num_ics; } driver.format (12,0); driver.frequency (30000000); } void update_led (SPI &driver, DigitalOut &xlat, DigitalOut &blank, unsigned short* LEDS) { blank = 1; blank = 0; for (int k = (num_drivers - 1); k >= 0; k--) { for (int i = (16 - 1); i >= 0; i--) { driver.write (*(LEDS + k + i)); } } xlat = 1; xlat = 0; }