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Keychron Q3 I2C & CKLED2001 transfer speedup (#18780)

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Stefan 2022-10-21 03:20:47 +02:00 committed by GitHub
parent 93a0995e48
commit 2c3859fbf7
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2 changed files with 15 additions and 9 deletions
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17
drivers/led/ckled2001.c
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@ -36,7 +36,7 @@
#endif #endif
// Transfer buffer for TWITransmitData() // 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. // These buffers match the CKLED2001 PWM registers.
// The control buffers match the PG0 LED On/Off 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) { bool CKLED2001_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
// Assumes PG1 is already selected. // Assumes PG1 is already selected.
// If any of the transactions fails function returns false. // If any of the transactions fails function returns false.
// Transmit PWM registers in 12 transfers of 16 bytes. // Transmit PWM registers in 3 transfers of 64 bytes.
// g_twi_transfer_buffer[] is 20 bytes
// Iterate over the pwm_buffer contents at 16 byte intervals. // Iterate over the pwm_buffer contents at 64 byte intervals.
for (int i = 0; i < 192; i += 16) { for (uint8_t i = 0; i < 192; i += 64) {
g_twi_transfer_buffer[0] = i; 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 // Device will auto-increment register for data after the first byte
// Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer. // 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]; g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j];
} }
#if CKLED2001_PERSISTENCE > 0 #if CKLED2001_PERSISTENCE > 0
for (uint8_t i = 0; i < CKLED2001_PERSISTENCE; i++) { 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; return false;
} }
} }
#else #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; return false;
} }
#endif #endif

7
keyboards/keychron/q3/config.h
View File

@ -31,6 +31,13 @@
#define DRIVER_ADDR_1 0b1110111 #define DRIVER_ADDR_1 0b1110111
#define DRIVER_ADDR_2 0b1110100 #define DRIVER_ADDR_2 0b1110100
/* Increase I2C speed to 1000 KHz */
#define I2C1_TIMINGR_PRESC 0U
#define I2C1_TIMINGR_SCLDEL 3U
#define I2C1_TIMINGR_SDADEL 0U
#define I2C1_TIMINGR_SCLH 15U
#define I2C1_TIMINGR_SCLL 51U
/* Scan phase of led driver set as MSKPHASE_9CHANNEL(defined as 0x03 in CKLED2001.h) */ /* Scan phase of led driver set as MSKPHASE_9CHANNEL(defined as 0x03 in CKLED2001.h) */
#define PHASE_CHANNEL MSKPHASE_9CHANNEL #define PHASE_CHANNEL MSKPHASE_9CHANNEL