mirror of
https://github.com/brmlab/ledbar.git
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101 lines
2.4 KiB
C++
101 lines
2.4 KiB
C++
/* Generic ledbar library taking care of I2C Arduino communication
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* with TLC59116. */
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#include <Wire.h>
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enum LedbarPinMode {
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LPM_OFF,
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LPM_ON,
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LPM_PWM,
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LPM_GRPPWM,
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};
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class Ledbar {
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public:
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void begin(unsigned char address); /* 7-bit TLC address */
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/* pin is 0 .. 15 */
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void setPinMode(int pin, enum LedbarPinMode pinMode);
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void setPinPWM(int pin, unsigned char dutyCycle);
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private:
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unsigned char address;
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unsigned char rawPinModes[4];
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} Ledbar;
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void Ledbar::begin(unsigned char address_)
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{
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address = address_;
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memset(&rawPinModes, 0, sizeof(rawPinModes));
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Wire.begin();
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Wire.beginTransmission(address);
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Wire.write(0x00); // reg 0
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Wire.write(0x01); // broadcast on, [5bit]=0 turns on oscillator
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Wire.endTransmission();
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}
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void Ledbar::setPinMode(int pin, enum LedbarPinMode pinMode)
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{
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Wire.beginTransmission(address);
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rawPinModes[pin / 4] &= ~(0x3 << (pin % 4 * 2));
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rawPinModes[pin / 4] |= (pinMode << (pin % 4 * 2));
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Wire.write(0x14 + pin / 4); Wire.write(rawPinModes[pin / 4]);
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Wire.endTransmission();
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}
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void Ledbar::setPinPWM(int pin, unsigned char dutyCycle)
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{
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Wire.beginTransmission(address);
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Wire.write(0x2 + pin); Wire.write(dutyCycle);
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Wire.endTransmission();
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}
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/** Current ledbar configuration: */
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#define NUM_TLCS 3
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#define TLCCH(tlc_num, ch_num) ((tlc_num) << 4 | (ch_num))
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#define CH 3
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const int cpin[5 * NUM_TLCS][CH] = {
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{TLCCH(0, 2), TLCCH(0, 1), TLCCH(0, 0)},
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{TLCCH(0, 5), TLCCH(0, 4), TLCCH(0, 3)},
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{TLCCH(0, 8), TLCCH(0, 7), TLCCH(0, 6)},
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{TLCCH(0, 11), TLCCH(0, 10),TLCCH(0, 9)},
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{TLCCH(0, 14),TLCCH(0, 13),TLCCH(0, 12)},
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{TLCCH(1, 2), TLCCH(1, 1), TLCCH(1, 0)},
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{TLCCH(1, 5), TLCCH(1, 4), TLCCH(1, 3)},
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{TLCCH(1, 8), TLCCH(1, 7), TLCCH(1, 6)},
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{TLCCH(1, 11), TLCCH(1, 10),TLCCH(1, 9)},
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{TLCCH(1, 14),TLCCH(1, 13),TLCCH(1, 12)},
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{TLCCH(2, 2), TLCCH(2, 1), TLCCH(2, 0)},
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{TLCCH(2, 5), TLCCH(2, 4), TLCCH(2, 3)},
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{TLCCH(2, 8), TLCCH(2, 7), TLCCH(2, 6)},
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{TLCCH(2, 11), TLCCH(2, 10),TLCCH(2, 9)},
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{TLCCH(2, 14),TLCCH(2, 13),TLCCH(2, 12)},
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};
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#define cpinsets (sizeof(cpin)/sizeof(cpin[0]))
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/* cca 2.7ohm resistor per channel */
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const int cmax[cpinsets][CH] = {
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{ 100, 250, 138 },
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{ 100, 250, 138 },
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{ 100, 250, 138 },
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{ 100, 240, 230 },
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{ 100, 230, 188 },
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{ 100, 250, 138 },
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{ 100, 250, 138 },
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{ 100, 250, 138 },
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{ 100, 240, 230 },
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{ 100, 230, 188 },
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{ 100, 250, 138 },
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{ 100, 250, 138 },
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{ 100, 250, 138 },
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{ 100, 240, 230 },
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{ 100, 230, 188 },
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};
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