clockworkpi/PicoCalc
1
0
Fork 0
mirror of https://github.com/clockworkpi/PicoCalc.git synced 2025-12-13 02:38:53 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Fix i2c slave scl freeze if read address first recieved

Browse Source 
If i2c master performs discovery via address read, stm32 has no data to
send for the masterin requestEvent. Send the zero byte if we got
requestEvent early, for example on i2c address read.
This commit is contained in:
shtirlic 2025-04-19 14:17:17 +07:00
parent 9ee62cd73f
commit f58e85e10e
No known key found for this signature in database
GPG Key ID: 6104D34BAB87C849
1 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Code/picocalc_keyboard/picocalc_keyboard.ino
View File

@ -36,7 +36,7 @@ void set_pmu_flag(void) { pmu_flag = true; }
HardwareSerial Serial1(PA10, PA9);
uint8_t write_buffer[10];
uint8_t write_buffer[10] = {0};
uint8_t write_buffer_len = 0;
uint8_t io_matrix[9];//for IO matrix,last bytye is the restore key(c64 only)
@ -180,7 +180,13 @@ void receiveEvent(int howMany) {
}
//-this is after receiveEvent-------------------------------
void requestEvent() { Wire.write(write_buffer,write_buffer_len ); }
void requestEvent() {
if (write_buffer_len > 0 && write_buffer_len <= sizeof(write_buffer)) {
Wire.write(write_buffer,write_buffer_len );
} else {
Wire.write((uint8_t)0); // Send something minimal to avoid stalling
}
}
void report_bat(){
if (PMU.isBatteryConnect()) {