diff options
Diffstat (limited to 'drivers/led/issi/is31fl3737-simple.c')
| -rw-r--r-- | drivers/led/issi/is31fl3737-simple.c | 54 |
1 files changed, 23 insertions, 31 deletions
diff --git a/drivers/led/issi/is31fl3737-simple.c b/drivers/led/issi/is31fl3737-simple.c index 7f641f4ca5..967a102b48 100644 --- a/drivers/led/issi/is31fl3737-simple.c +++ b/drivers/led/issi/is31fl3737-simple.c @@ -49,11 +49,10 @@ # define IS31FL3737_GLOBAL_CURRENT 0xFF #endif -// Transfer buffer for TWITransmitData() -uint8_t g_twi_transfer_buffer[20]; +uint8_t i2c_transfer_buffer[20]; // These buffers match the IS31FL3737 PWM registers. -// The control buffers match the PG0 LED On/Off registers. +// The control buffers match the page 0 LED On/Off registers. // Storing them like this is optimal for I2C transfers to the registers. // We could optimize this and take out the unused registers from these // buffers and the transfers in is31fl3737_write_pwm_buffer() but it's @@ -66,38 +65,43 @@ uint8_t g_led_control_registers[IS31FL3737_DRIVER_COUNT][IS31FL3737_LED_CONTROL_ bool g_led_control_registers_update_required[IS31FL3737_DRIVER_COUNT] = {false}; void is31fl3737_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 IS31FL3737_I2C_PERSISTENCE > 0 for (uint8_t i = 0; i < IS31FL3737_I2C_PERSISTENCE; i++) { - if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3737_I2C_TIMEOUT) == 0) break; + if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3737_I2C_TIMEOUT) == 0) break; } #else - i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3737_I2C_TIMEOUT); + i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3737_I2C_TIMEOUT); #endif } +void is31fl3737_select_page(uint8_t addr, uint8_t page) { + is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND_WRITE_LOCK, IS31FL3737_COMMAND_WRITE_LOCK_MAGIC); + is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND, page); +} + void is31fl3737_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) { - // assumes PG1 is already selected + // assumes page 1 is already selected // transmit PWM registers in 12 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 < IS31FL3737_PWM_REGISTER_COUNT; i += 16) { - g_twi_transfer_buffer[0] = i; + i2c_transfer_buffer[0] = i; // copy the data from i to i+15 // device will auto-increment register for data after the first byte // thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer - memcpy(g_twi_transfer_buffer + 1, pwm_buffer + i, 16); + memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16); #if IS31FL3737_I2C_PERSISTENCE > 0 for (uint8_t i = 0; i < IS31FL3737_I2C_PERSISTENCE; i++) { - if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3737_I2C_TIMEOUT) == 0) break; + if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3737_I2C_TIMEOUT) == 0) break; } #else - i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3737_I2C_TIMEOUT); + i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3737_I2C_TIMEOUT); #endif } } @@ -138,32 +142,23 @@ void is31fl3737_init(uint8_t addr) { // Set up the mode and other settings, clear the PWM registers, // then disable software shutdown. - // Unlock the command register. - is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND_WRITE_LOCK, IS31FL3737_COMMAND_WRITE_LOCK_MAGIC); + is31fl3737_select_page(addr, IS31FL3737_COMMAND_LED_CONTROL); - // Select PG0 - is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND, IS31FL3737_COMMAND_LED_CONTROL); // Turn off all LEDs. for (int i = 0; i < IS31FL3737_LED_CONTROL_REGISTER_COUNT; i++) { is31fl3737_write_register(addr, i, 0x00); } - // Unlock the command register. - is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND_WRITE_LOCK, IS31FL3737_COMMAND_WRITE_LOCK_MAGIC); + is31fl3737_select_page(addr, IS31FL3737_COMMAND_PWM); - // Select PG1 - is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND, IS31FL3737_COMMAND_PWM); // Set PWM on all LEDs to 0 // No need to setup Breath registers to PWM as that is the default. for (int i = 0; i < IS31FL3737_PWM_REGISTER_COUNT; i++) { is31fl3737_write_register(addr, i, 0x00); } - // Unlock the command register. - is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND_WRITE_LOCK, IS31FL3737_COMMAND_WRITE_LOCK_MAGIC); + is31fl3737_select_page(addr, IS31FL3737_COMMAND_FUNCTION); - // Select PG3 - is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND, IS31FL3737_COMMAND_FUNCTION); // Set de-ghost pull-up resistors (SWx) is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_SW_PULLUP, IS31FL3737_SW_PULLUP); // Set de-ghost pull-down resistors (CSx) @@ -214,9 +209,7 @@ void is31fl3737_set_led_control_register(uint8_t index, bool value) { void is31fl3737_update_pwm_buffers(uint8_t addr, uint8_t index) { if (g_pwm_buffer_update_required[index]) { - // Firstly we need to unlock the command register and select PG1 - is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND_WRITE_LOCK, IS31FL3737_COMMAND_WRITE_LOCK_MAGIC); - is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND, IS31FL3737_COMMAND_PWM); + is31fl3737_select_page(addr, IS31FL3737_COMMAND_PWM); is31fl3737_write_pwm_buffer(addr, g_pwm_buffer[index]); g_pwm_buffer_update_required[index] = false; @@ -225,9 +218,8 @@ void is31fl3737_update_pwm_buffers(uint8_t addr, uint8_t index) { void is31fl3737_update_led_control_registers(uint8_t addr, uint8_t index) { if (g_led_control_registers_update_required[index]) { - // Firstly we need to unlock the command register and select PG0 - is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND_WRITE_LOCK, IS31FL3737_COMMAND_WRITE_LOCK_MAGIC); - is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND, IS31FL3737_COMMAND_LED_CONTROL); + is31fl3737_select_page(addr, IS31FL3737_COMMAND_LED_CONTROL); + for (int i = 0; i < IS31FL3737_LED_CONTROL_REGISTER_COUNT; i++) { is31fl3737_write_register(addr, i, g_led_control_registers[index][i]); } |