diff options
Diffstat (limited to 'drivers/avr/is31fl3731.c')
| -rw-r--r-- | drivers/avr/is31fl3731.c | 56 |
1 files changed, 32 insertions, 24 deletions
diff --git a/drivers/avr/is31fl3731.c b/drivers/avr/is31fl3731.c index 13dfe6eaf..158b77b7b 100644 --- a/drivers/avr/is31fl3731.c +++ b/drivers/avr/is31fl3731.c @@ -78,18 +78,19 @@ bool g_led_control_registers_update_required = false; // 0x10 - R16,R15,R14,R13,R12,R11,R10,R09 -void IS31FL3731_write_register( uint8_t addr, uint8_t reg, uint8_t data ) +uint8_t IS31FL3731_write_register( uint8_t addr, uint8_t reg, uint8_t data ) { g_twi_transfer_buffer[0] = reg; g_twi_transfer_buffer[1] = data; //Transmit data until succesful //while(i2c_transmit(addr << 1, g_twi_transfer_buffer,2) != 0); - i2c_transmit(addr << 1, g_twi_transfer_buffer,2); + return i2c_transmit(addr << 1, g_twi_transfer_buffer,2); } -void IS31FL3731_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer ) +uint8_t IS31FL3731_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer ) { + uint8_t ret = 0; // assumes bank is already selected // transmit PWM registers in 9 transfers of 16 bytes @@ -110,64 +111,67 @@ void IS31FL3731_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer ) //Transmit buffer until succesful //while(i2c_transmit(addr << 1, g_twi_transfer_buffer,17) != 0); - i2c_transmit(addr << 1, g_twi_transfer_buffer,17); - + ret |= i2c_transmit(addr << 1, g_twi_transfer_buffer, 17); } + return ret; } -void IS31FL3731_init( uint8_t addr ) +uint8_t IS31FL3731_init( uint8_t addr ) { + uint8_t ret = 0; // In order to avoid the LEDs being driven with garbage data // in the LED driver's PWM registers, first enable software shutdown, // then set up the mode and other settings, clear the PWM registers, // then disable software shutdown. // select "function register" bank - IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG ); + ret |= IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG ); // enable software shutdown - IS31FL3731_write_register( addr, ISSI_REG_SHUTDOWN, 0x00 ); + ret |= IS31FL3731_write_register( addr, ISSI_REG_SHUTDOWN, 0x00 ); // this delay was copied from other drivers, might not be needed _delay_ms( 10 ); // picture mode - IS31FL3731_write_register( addr, ISSI_REG_CONFIG, ISSI_REG_CONFIG_PICTUREMODE ); + ret |= IS31FL3731_write_register( addr, ISSI_REG_CONFIG, ISSI_REG_CONFIG_PICTUREMODE ); // display frame 0 - IS31FL3731_write_register( addr, ISSI_REG_PICTUREFRAME, 0x00 ); + ret |= IS31FL3731_write_register( addr, ISSI_REG_PICTUREFRAME, 0x00 ); // audio sync off - IS31FL3731_write_register( addr, ISSI_REG_AUDIOSYNC, 0x00 ); + ret |= IS31FL3731_write_register( addr, ISSI_REG_AUDIOSYNC, 0x00 ); // select bank 0 - IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, 0 ); + ret |= IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, 0 ); // turn off all LEDs in the LED control register for ( int i = 0x00; i <= 0x11; i++ ) { - IS31FL3731_write_register( addr, i, 0x00 ); + ret |= IS31FL3731_write_register( addr, i, 0x00 ); } // turn off all LEDs in the blink control register (not really needed) for ( int i = 0x12; i <= 0x23; i++ ) { - IS31FL3731_write_register( addr, i, 0x00 ); + ret |= IS31FL3731_write_register( addr, i, 0x00 ); } // set PWM on all LEDs to 0 for ( int i = 0x24; i <= 0xB3; i++ ) { - IS31FL3731_write_register( addr, i, 0x00 ); + ret |= IS31FL3731_write_register( addr, i, 0x00 ); } // select "function register" bank - IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG ); + ret |= IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG ); // disable software shutdown - IS31FL3731_write_register( addr, ISSI_REG_SHUTDOWN, 0x01 ); + ret |= IS31FL3731_write_register( addr, ISSI_REG_SHUTDOWN, 0x01 ); // select bank 0 and leave it selected. // most usage after initialization is just writing PWM buffers in bank 0 // as there's not much point in double-buffering - IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, 0 ); + ret |= IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, 0 ); + + return ret; } void IS31FL3731_set_color( int index, uint8_t red, uint8_t green, uint8_t blue ) @@ -223,25 +227,29 @@ void IS31FL3731_set_led_control_register( uint8_t index, bool red, bool green, b } -void IS31FL3731_update_pwm_buffers( uint8_t addr1, uint8_t addr2 ) +uint8_t IS31FL3731_update_pwm_buffers( uint8_t addr1, uint8_t addr2 ) { + uint8_t ret = 0; if ( g_pwm_buffer_update_required ) { - IS31FL3731_write_pwm_buffer( addr1, g_pwm_buffer[0] ); - IS31FL3731_write_pwm_buffer( addr2, g_pwm_buffer[1] ); + ret |= IS31FL3731_write_pwm_buffer( addr1, g_pwm_buffer[0] ); + ret |= IS31FL3731_write_pwm_buffer( addr2, g_pwm_buffer[1] ); } g_pwm_buffer_update_required = false; + return ret; } -void IS31FL3731_update_led_control_registers( uint8_t addr1, uint8_t addr2 ) +uint8_t IS31FL3731_update_led_control_registers( uint8_t addr1, uint8_t addr2 ) { + uint8_t ret = 0; if ( g_led_control_registers_update_required ) { for ( int i=0; i<18; i++ ) { - IS31FL3731_write_register(addr1, i, g_led_control_registers[0][i] ); - IS31FL3731_write_register(addr2, i, g_led_control_registers[1][i] ); + ret |= IS31FL3731_write_register(addr1, i, g_led_control_registers[0][i] ); + ret |= IS31FL3731_write_register(addr2, i, g_led_control_registers[1][i] ); } } + return ret; } |