Class to control the chainable RGB LED light from Seeed Studios
Dependents: Nucleo_read_button_interrupt_copy Seeed_Grove_4_Digit_Display_Clock
SeeedChainableLED.h
- Committer:
- tulanthoar
- Date:
- 2017-05-21
- Revision:
- 0:fab321797d4b
File content as of revision 0:fab321797d4b:
/** * @file SeeedChainableLED.h * @brief control the chainable LED module from Seeed Studios * @author Nathan Yonkee * @version 1.0 * @date 2017-04-20 */ #ifndef SEEED_CHAINABLE_LED_H #define SEEED_CHAINABLE_LED_H #include "mbed.h" #include "DataClockPair.h" class SeeedChainableLED { private: DigitalOut datPin_; DigitalOut clkPin_; void start_cmd(); void stop_cmd(); void pin_delay(int delay_us = 6); void send_byte(int byte); void send_color(int r, int g, int b); public: void set_color_rgb(int r, int g, int b, int led = 0); void clear_led(); void turn_on(); SeeedChainableLED (DataClockPair pins); }; SeeedChainableLED::SeeedChainableLED(DataClockPair pins) : datPin_(pins.dataPin), clkPin_(pins.clockPin) { clear_led(); } void SeeedChainableLED::start_cmd() { send_byte(0x00); send_byte(0x00); send_byte(0x00); send_byte(0x00); } void SeeedChainableLED::stop_cmd() { start_cmd(); } void SeeedChainableLED::clear_led() { set_color_rgb(0,0,0); } void SeeedChainableLED::turn_on() { set_color_rgb(255,255,255); } void SeeedChainableLED::pin_delay(int delay_us) { wait_us(delay_us); } void SeeedChainableLED::set_color_rgb(int r, int g, int b, int led) { start_cmd(); send_color(r, g, b); stop_cmd(); } void SeeedChainableLED::send_color(int red, int green, int blue) { // Start by sending a byte with the format "1 1 /B7 /B6 /G7 /G6 /R7 /R6" int prefix = 0b11000000; if ((blue & 0x80) == 0) prefix|= 0b00100000; if ((blue & 0x40) == 0) prefix|= 0b00010000; if ((green & 0x80) == 0) prefix|= 0b00001000; if ((green & 0x40) == 0) prefix|= 0b00000100; if ((red & 0x80) == 0) prefix|= 0b00000010; if ((red & 0x40) == 0) prefix|= 0b00000001; send_byte(prefix); // Now send the 3 colors send_byte(blue); send_byte(green); send_byte(red); } void SeeedChainableLED::send_byte(int byte) { for (int i = 0; i < 8; i++) { pin_delay(); datPin_ = byte & 0x80; byte <<= 1; clkPin_ = 0; pin_delay(); clkPin_ = 1; } } #endif