max/tmk_keyboard
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

core: Fix ibm4704_send() wait for clock to start

Browse source
This commit is contained in:
tmk 2019-07-12 16:08:05 +09:00
parent 68f88b33e2
commit f4fd22aaa0
1 changed files with 3 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
tmk_core/protocol/ibm4704.c
View file

@ -39,7 +39,7 @@ Data ____|__/ X____X____X____X____X____X____X____X____X____X \___
| Start 0 1 2 3 4 5 6 7 P Stop
Request by host
Start bit: can be long as 300-350us.
Start bit: can be long as 300-350us during start up and upto 2500us while key scanning
Request: Host pulls Clock line down to request to send a command.
Timing: After Request keyboard pull up Data and down Clock line to low for start bit.
After request host release Clock line once Data line becomes hi.
@ -58,7 +58,7 @@ uint8_t ibm4704_send(uint8_t data)
clock_lo();
/* wait for Start bit(Clock:lo/Data:hi) */
WAIT(data_hi, 300, 0x30);
WAIT(data_hi, 5000, 0x30);
/* Data bit */
for (uint8_t i = 0; i < 8; i++) {
@ -89,7 +89,7 @@ uint8_t ibm4704_send(uint8_t data)
return 0;
ERROR:
idle();
if (ibm4704_error > 0x30) {
if (ibm4704_error >= 0x30) {
xprintf("S:%02X ", ibm4704_error);
}
IBM4704_INT_ON();