diff options
Diffstat (limited to 'drivers/led')
| -rw-r--r-- | drivers/led/ckled2001.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/led/ckled2001.c b/drivers/led/ckled2001.c index 1651628175..a99b479d1c 100644 --- a/drivers/led/ckled2001.c +++ b/drivers/led/ckled2001.c @@ -36,7 +36,7 @@ #endif // Transfer buffer for TWITransmitData() -uint8_t g_twi_transfer_buffer[20]; +uint8_t g_twi_transfer_buffer[65]; // These buffers match the CKLED2001 PWM registers. // The control buffers match the PG0 LED On/Off registers. @@ -72,27 +72,26 @@ bool CKLED2001_write_register(uint8_t addr, uint8_t reg, uint8_t data) { bool CKLED2001_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) { // Assumes PG1 is already selected. // If any of the transactions fails function returns false. - // Transmit PWM registers in 12 transfers of 16 bytes. - // g_twi_transfer_buffer[] is 20 bytes + // Transmit PWM registers in 3 transfers of 64 bytes. - // Iterate over the pwm_buffer contents at 16 byte intervals. - for (int i = 0; i < 192; i += 16) { + // Iterate over the pwm_buffer contents at 64 byte intervals. + for (uint8_t i = 0; i < 192; i += 64) { g_twi_transfer_buffer[0] = i; - // Copy the data from i to i+15. + // Copy the data from i to i+63. // Device will auto-increment register for data after the first byte // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer. - for (int j = 0; j < 16; j++) { + for (uint8_t j = 0; j < 64; j++) { g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j]; } #if CKLED2001_PERSISTENCE > 0 for (uint8_t i = 0; i < CKLED2001_PERSISTENCE; i++) { - if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, CKLED2001_TIMEOUT) != 0) { + if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 65, CKLED2001_TIMEOUT) != 0) { return false; } } #else - if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, CKLED2001_TIMEOUT) != 0) { + if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 65, CKLED2001_TIMEOUT) != 0) { return false; } #endif |