Cascaded led driver to write use write into leds[i] = 0x0 or 0xfff
Fork of TLC5940 by
Diff: TLC5940.cpp
- Revision:
- 1:05d2234c0965
- Parent:
- 0:1fb7b50d16b1
- Child:
- 2:ff6fc805f4ea
--- a/TLC5940.cpp Fri Jan 25 21:54:56 2013 +0000 +++ b/TLC5940.cpp Fri Mar 22 16:46:41 2013 +0000 @@ -1,47 +1,44 @@ #include "TLC5940.h" - +int num_drivers = 1; -void setup (SPI &driver, PwmOut &gsclk, PinName xlat, PinName blank, PinName dcprg, PinName vprg, int num_ics) +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 = 1; // Blank (squelch) all outputs + 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 1 MHz + 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 (16,0); + driver.format (12,0); driver.frequency (30000000); } - -void update_led (SPI &driver, uint16_t LEDS [][]) +void update_led (SPI &driver, DigitalOut &xlat, DigitalOut &blank, unsigned short* LEDS) { blank = 1; - dcprg = 1; - vprg = 0; - xlat = 0; - - for (int k = 0; k < num_drivers; k++) + blank = 0; + for (int k = (num_drivers - 1); k >= 0; k--) { - for (int i = 0; i < 16; i++) + for (int i = (16 - 1); i >= 0; i--) { - driver.write (LEDS [k][i]); + driver.write (*(LEDS + k + i)); } } xlat = 1; xlat = 0; - blank = 0; } \ No newline at end of file