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authorStefan <ctndesigner@gmail.com>2022-10-21 03:20:47 +0200
committerGitHub <noreply@github.com>2022-10-20 18:20:47 -0700
commit2c3859fbf7f4253dc8d3751063e5e64145cd2a8c (patch)
tree3f7bf22338c973abf8a4ecb879ffbdfd63d5cb2f /drivers/led
parent93a0995e485e4d2fe1cb070edffcdd8581d525ed (diff)
Keychron Q3 I2C & CKLED2001 transfer speedup (#18780)
Diffstat (limited to 'drivers/led')
-rw-r--r--drivers/led/ckled2001.c17
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/led/ckled2001.c b/drivers/led/ckled2001.c
index b7e7db06cc..16a096780b 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