diff options
Diffstat (limited to 'drivers/led/issi/is31fl3731.c')
| -rw-r--r-- | drivers/led/issi/is31fl3731.c | 42 |
1 files changed, 21 insertions, 21 deletions
diff --git a/drivers/led/issi/is31fl3731.c b/drivers/led/issi/is31fl3731.c index 1ab8997731..9a7d0b5eca 100644 --- a/drivers/led/issi/is31fl3731.c +++ b/drivers/led/issi/is31fl3731.c @@ -32,8 +32,7 @@ # define IS31FL3731_I2C_PERSISTENCE 0 #endif -// Transfer buffer for TWITransmitData() -uint8_t g_twi_transfer_buffer[20]; +uint8_t i2c_transfer_buffer[20]; // These buffers match the IS31FL3731 PWM registers 0x24-0xB3. // Storing them like this is optimal for I2C transfers to the registers. @@ -47,39 +46,43 @@ uint8_t g_led_control_registers[IS31FL3731_DRIVER_COUNT][IS31FL3731_LED_CONTROL_ bool g_led_control_registers_update_required[IS31FL3731_DRIVER_COUNT] = {false}; void is31fl3731_write_register(uint8_t addr, uint8_t reg, uint8_t data) { - g_twi_transfer_buffer[0] = reg; - g_twi_transfer_buffer[1] = data; + i2c_transfer_buffer[0] = reg; + i2c_transfer_buffer[1] = data; #if IS31FL3731_I2C_PERSISTENCE > 0 for (uint8_t i = 0; i < IS31FL3731_I2C_PERSISTENCE; i++) { - if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3731_I2C_TIMEOUT) == 0) break; + if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3731_I2C_TIMEOUT) == 0) break; } #else - i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3731_I2C_TIMEOUT); + i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3731_I2C_TIMEOUT); #endif } +void is31fl3731_select_page(uint8_t addr, uint8_t page) { + is31fl3731_write_register(addr, IS31FL3731_REG_COMMAND, page); +} + void is31fl3731_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) { - // assumes bank is already selected + // assumes page 0 is already selected // transmit PWM registers in 9 transfers of 16 bytes - // g_twi_transfer_buffer[] is 20 bytes + // i2c_transfer_buffer[] is 20 bytes // iterate over the pwm_buffer contents at 16 byte intervals for (int i = 0; i < IS31FL3731_PWM_REGISTER_COUNT; i += 16) { // set the first register, e.g. 0x24, 0x34, 0x44, etc. - g_twi_transfer_buffer[0] = 0x24 + i; + i2c_transfer_buffer[0] = 0x24 + i; // copy the data from i to i+15 // device will auto-increment register for data after the first byte // thus this sets registers 0x24-0x33, 0x34-0x43, etc. in one transfer - memcpy(g_twi_transfer_buffer + 1, pwm_buffer + i, 16); + memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16); #if IS31FL3731_I2C_PERSISTENCE > 0 for (uint8_t i = 0; i < IS31FL3731_I2C_PERSISTENCE; i++) { - if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3731_I2C_TIMEOUT) == 0) break; + if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3731_I2C_TIMEOUT) == 0) break; } #else - i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3731_I2C_TIMEOUT); + i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3731_I2C_TIMEOUT); #endif } } @@ -120,8 +123,7 @@ void is31fl3731_init(uint8_t addr) { // then set up the mode and other settings, clear the PWM registers, // then disable software shutdown. - // select "function register" bank - is31fl3731_write_register(addr, IS31FL3731_REG_COMMAND, IS31FL3731_COMMAND_FUNCTION); + is31fl3731_select_page(addr, IS31FL3731_COMMAND_FUNCTION); // enable software shutdown is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x00); @@ -139,8 +141,7 @@ void is31fl3731_init(uint8_t addr) { // audio sync off is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_AUDIO_SYNC, 0x00); - // select bank 0 - is31fl3731_write_register(addr, IS31FL3731_REG_COMMAND, IS31FL3731_COMMAND_FRAME_1); + is31fl3731_select_page(addr, IS31FL3731_COMMAND_FRAME_1); // turn off all LEDs in the LED control register for (int i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) { @@ -157,16 +158,15 @@ void is31fl3731_init(uint8_t addr) { is31fl3731_write_register(addr, i, 0x00); } - // select "function register" bank - is31fl3731_write_register(addr, IS31FL3731_REG_COMMAND, IS31FL3731_COMMAND_FUNCTION); + is31fl3731_select_page(addr, IS31FL3731_COMMAND_FUNCTION); // disable software shutdown is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x01); - // select bank 0 and leave it selected. - // most usage after initialization is just writing PWM buffers in bank 0 + // select page 0 and leave it selected. + // most usage after initialization is just writing PWM buffers in page 0 // as there's not much point in double-buffering - is31fl3731_write_register(addr, IS31FL3731_REG_COMMAND, IS31FL3731_COMMAND_FRAME_1); + is31fl3731_select_page(addr, IS31FL3731_COMMAND_FRAME_1); } void is31fl3731_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) { |