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@ -49,6 +49,14 @@ |
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#define ISSI_COMMANDREGISTER 0xFD |
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#define ISSI_COMMANDREGISTER 0xFD |
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#define ISSI_BANK_FUNCTIONREG 0x0B // helpfully called 'page nine'
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#define ISSI_BANK_FUNCTIONREG 0x0B // helpfully called 'page nine'
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#ifndef ISSI_TIMEOUT |
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#define ISSI_TIMEOUT 100 |
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#endif |
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#ifndef ISSI_PERSISTENCE |
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#define ISSI_PERSISTENCE 0 |
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#endif |
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// Transfer buffer for TWITransmitData()
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// Transfer buffer for TWITransmitData()
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uint8_t g_twi_transfer_buffer[20]; |
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uint8_t g_twi_transfer_buffer[20]; |
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@ -78,100 +86,104 @@ bool g_led_control_registers_update_required = false; |
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// 0x10 - R16,R15,R14,R13,R12,R11,R10,R09
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// 0x10 - R16,R15,R14,R13,R12,R11,R10,R09
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uint8_t IS31FL3731_write_register( uint8_t addr, uint8_t reg, uint8_t data ) |
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void IS31FL3731_write_register( uint8_t addr, uint8_t reg, uint8_t data ) |
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{ |
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{ |
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g_twi_transfer_buffer[0] = reg; |
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g_twi_transfer_buffer[0] = reg; |
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g_twi_transfer_buffer[1] = data; |
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g_twi_transfer_buffer[1] = data; |
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//Transmit data until succesful
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#if ISSI_PERSISTENCE > 0 |
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//while(i2c_transmit(addr << 1, g_twi_transfer_buffer,2) != 0);
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for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) { |
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return i2c_transmit(addr << 1, g_twi_transfer_buffer,2); |
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if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT) == 0) |
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break; |
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} |
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#else |
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i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT); |
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#endif |
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} |
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} |
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uint8_t IS31FL3731_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer ) |
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void IS31FL3731_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer ) |
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{ |
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{ |
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uint8_t ret = 0; |
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// assumes bank is already selected
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// assumes bank is already selected
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// transmit PWM registers in 9 transfers of 16 bytes
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// transmit PWM registers in 9 transfers of 16 bytes
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// g_twi_transfer_buffer[] is 20 bytes
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// g_twi_transfer_buffer[] is 20 bytes
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// iterate over the pwm_buffer contents at 16 byte intervals
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// iterate over the pwm_buffer contents at 16 byte intervals
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for ( int i = 0; i < 144; i += 16 ) |
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for ( int i = 0; i < 144; i += 16 ) { |
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{ |
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// set the first register, e.g. 0x24, 0x34, 0x44, etc.
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// set the first register, e.g. 0x24, 0x34, 0x44, etc.
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g_twi_transfer_buffer[0] = 0x24 + i; |
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g_twi_transfer_buffer[0] = 0x24 + i; |
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// copy the data from i to i+15
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// copy the data from i to i+15
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// device will auto-increment register for data after the first byte
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// device will auto-increment register for data after the first byte
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// thus this sets registers 0x24-0x33, 0x34-0x43, etc. in one transfer
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// thus this sets registers 0x24-0x33, 0x34-0x43, etc. in one transfer
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for ( int j = 0; j < 16; j++ ) |
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for ( int j = 0; j < 16; j++ ) { |
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{ |
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g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j]; |
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g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j]; |
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} |
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} |
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//Transmit buffer until succesful
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#if ISSI_PERSISTENCE > 0 |
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//while(i2c_transmit(addr << 1, g_twi_transfer_buffer,17) != 0);
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for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) { |
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ret |= i2c_transmit(addr << 1, g_twi_transfer_buffer, 17); |
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if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT) == 0) |
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break; |
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} |
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#else |
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i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT); |
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#endif |
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} |
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} |
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return ret; |
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} |
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} |
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uint8_t IS31FL3731_init( uint8_t addr ) |
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void IS31FL3731_init( uint8_t addr ) |
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{ |
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{ |
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uint8_t ret = 0; |
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// In order to avoid the LEDs being driven with garbage data
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// In order to avoid the LEDs being driven with garbage data
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// in the LED driver's PWM registers, first enable software shutdown,
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// in the LED driver's PWM registers, first enable software shutdown,
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// then set up the mode and other settings, clear the PWM registers,
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// then set up the mode and other settings, clear the PWM registers,
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// then disable software shutdown.
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// then disable software shutdown.
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// select "function register" bank
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// select "function register" bank
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ret |= IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG ); |
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IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG ); |
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// enable software shutdown
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// enable software shutdown
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ret |= IS31FL3731_write_register( addr, ISSI_REG_SHUTDOWN, 0x00 ); |
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IS31FL3731_write_register( addr, ISSI_REG_SHUTDOWN, 0x00 ); |
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// this delay was copied from other drivers, might not be needed
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// this delay was copied from other drivers, might not be needed
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_delay_ms( 10 ); |
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_delay_ms( 10 ); |
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// picture mode
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// picture mode
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ret |= IS31FL3731_write_register( addr, ISSI_REG_CONFIG, ISSI_REG_CONFIG_PICTUREMODE ); |
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IS31FL3731_write_register( addr, ISSI_REG_CONFIG, ISSI_REG_CONFIG_PICTUREMODE ); |
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// display frame 0
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// display frame 0
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ret |= IS31FL3731_write_register( addr, ISSI_REG_PICTUREFRAME, 0x00 ); |
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IS31FL3731_write_register( addr, ISSI_REG_PICTUREFRAME, 0x00 ); |
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// audio sync off
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// audio sync off
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ret |= IS31FL3731_write_register( addr, ISSI_REG_AUDIOSYNC, 0x00 ); |
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IS31FL3731_write_register( addr, ISSI_REG_AUDIOSYNC, 0x00 ); |
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// select bank 0
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// select bank 0
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ret |= IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, 0 ); |
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IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, 0 ); |
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// turn off all LEDs in the LED control register
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// turn off all LEDs in the LED control register
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for ( int i = 0x00; i <= 0x11; i++ ) |
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for ( int i = 0x00; i <= 0x11; i++ ) |
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{ |
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{ |
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ret |= IS31FL3731_write_register( addr, i, 0x00 ); |
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IS31FL3731_write_register( addr, i, 0x00 ); |
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} |
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} |
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// turn off all LEDs in the blink control register (not really needed)
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// turn off all LEDs in the blink control register (not really needed)
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for ( int i = 0x12; i <= 0x23; i++ ) |
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for ( int i = 0x12; i <= 0x23; i++ ) |
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{ |
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{ |
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ret |= IS31FL3731_write_register( addr, i, 0x00 ); |
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IS31FL3731_write_register( addr, i, 0x00 ); |
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} |
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} |
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// set PWM on all LEDs to 0
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// set PWM on all LEDs to 0
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for ( int i = 0x24; i <= 0xB3; i++ ) |
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for ( int i = 0x24; i <= 0xB3; i++ ) |
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{ |
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{ |
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ret |= IS31FL3731_write_register( addr, i, 0x00 ); |
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IS31FL3731_write_register( addr, i, 0x00 ); |
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} |
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} |
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// select "function register" bank
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// select "function register" bank
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ret |= IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG ); |
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IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG ); |
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// disable software shutdown
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// disable software shutdown
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ret |= IS31FL3731_write_register( addr, ISSI_REG_SHUTDOWN, 0x01 ); |
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IS31FL3731_write_register( addr, ISSI_REG_SHUTDOWN, 0x01 ); |
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// select bank 0 and leave it selected.
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// select bank 0 and leave it selected.
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// most usage after initialization is just writing PWM buffers in bank 0
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// most usage after initialization is just writing PWM buffers in bank 0
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// as there's not much point in double-buffering
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// as there's not much point in double-buffering
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ret |= IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, 0 ); |
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IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, 0 ); |
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return ret; |
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} |
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} |
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void IS31FL3731_set_color( int index, uint8_t red, uint8_t green, uint8_t blue ) |
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void IS31FL3731_set_color( int index, uint8_t red, uint8_t green, uint8_t blue ) |
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@ -224,32 +236,27 @@ void IS31FL3731_set_led_control_register( uint8_t index, bool red, bool green, b |
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g_led_control_registers_update_required = true; |
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g_led_control_registers_update_required = true; |
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} |
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} |
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uint8_t IS31FL3731_update_pwm_buffers( uint8_t addr1, uint8_t addr2 ) |
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void IS31FL3731_update_pwm_buffers( uint8_t addr1, uint8_t addr2 ) |
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{ |
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{ |
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uint8_t ret = 0; |
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if ( g_pwm_buffer_update_required ) |
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if ( g_pwm_buffer_update_required ) |
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{ |
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{ |
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ret |= IS31FL3731_write_pwm_buffer( addr1, g_pwm_buffer[0] ); |
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IS31FL3731_write_pwm_buffer( addr1, g_pwm_buffer[0] ); |
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ret |= IS31FL3731_write_pwm_buffer( addr2, g_pwm_buffer[1] ); |
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IS31FL3731_write_pwm_buffer( addr2, g_pwm_buffer[1] ); |
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} |
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} |
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g_pwm_buffer_update_required = false; |
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g_pwm_buffer_update_required = false; |
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return ret; |
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} |
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} |
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uint8_t IS31FL3731_update_led_control_registers( uint8_t addr1, uint8_t addr2 ) |
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void IS31FL3731_update_led_control_registers( uint8_t addr1, uint8_t addr2 ) |
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{ |
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{ |
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uint8_t ret = 0; |
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if ( g_led_control_registers_update_required ) |
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if ( g_led_control_registers_update_required ) |
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{ |
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{ |
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for ( int i=0; i<18; i++ ) |
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for ( int i=0; i<18; i++ ) |
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{ |
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{ |
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ret |= IS31FL3731_write_register(addr1, i, g_led_control_registers[0][i] ); |
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IS31FL3731_write_register(addr1, i, g_led_control_registers[0][i] ); |
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ret |= IS31FL3731_write_register(addr2, i, g_led_control_registers[1][i] ); |
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IS31FL3731_write_register(addr2, i, g_led_control_registers[1][i] ); |
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} |
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} |
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} |
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} |
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return ret; |
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} |
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} |
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