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Second attempt at retrieving the SN from the 32u2 IC

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Voinea Dragos 2021-06-17 12:08:40 +03:00 committed by DRracer
parent 6d25345fc4
commit 0cbc759d8b
1 changed files with 42 additions and 25 deletions
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57
Firmware/Marlin_main.cpp
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@ -460,7 +460,7 @@ static void temp_compensation_start();
static void temp_compensation_apply();
#endif
static bool get_PRUSA_SN(char* SN);
static uint8_t get_PRUSA_SN(char* SN);
uint16_t gcode_in_progress = 0;
uint16_t mcode_in_progress = 0;
@ -1074,12 +1074,14 @@ void setup()
}
#endif //TMC2130
//saved EEPROM SN is not valid. Try to retrieve it.
//SN is valid only if it is NULL terminated. Any other character means either uninitialized or corrupted
if (eeprom_read_byte((uint8_t*)EEPROM_PRUSA_SN + 19))
//Check for valid SN in EEPROM. Try to retrieve it in case it's invalid.
//SN is valid only if it is NULL terminated and starts with "CZPX".
{
char SN[20];
if (get_PRUSA_SN(SN))
eeprom_read_block(SN, (uint8_t*)EEPROM_PRUSA_SN, 20);
if (SN[19] || strncmp_P(SN, PSTR("CZPX"), 4))
{
if (!get_PRUSA_SN(SN))
{
eeprom_update_block(SN, (uint8_t*)EEPROM_PRUSA_SN, 20);
puts_P(PSTR("SN updated"));
@ -1087,6 +1089,7 @@ void setup()
else
puts_P(PSTR("SN update failed"));
}
}
#ifndef XFLASH
@ -3833,33 +3836,47 @@ void gcode_M701()
*
* Send command ;S to serial port 0 to retrieve serial number stored in 32U2 processor,
* reply is stored in *SN.
* Operation takes typically 23 ms. If the retransmit is not finished until 100 ms,
* it is interrupted, so less, or no characters are retransmitted, the function returns false
* Operation takes typically 23 ms. If no valid SN can be retrieved within the 250ms window, the function aborts
* and returns a general failure flag.
* The command will fail if the 32U2 processor is unpowered via USB since it is isolated from the rest of the electronics.
* In that case the value that is stored in the EEPROM should be used instead.
*
* @return 1 on success
* @return 0 on general failure
* @return 0 on success
* @return 1 on general failure
*/
static bool get_PRUSA_SN(char* SN)
static uint8_t get_PRUSA_SN(char* SN)
{
uint8_t selectedSerialPort_bak = selectedSerialPort;
selectedSerialPort = 0;
SERIAL_ECHOLNRPGM(PSTR(";S"));
uint8_t numbersRead = 0;
uint8_t rxIndex;
bool SN_valid = false;
ShortTimer timeout;
selectedSerialPort = 0;
timeout.start();
while (numbersRead < 19) {
if (MSerial.available() > 0) {
SN[numbersRead] = MSerial.read();
numbersRead++;
while (!SN_valid)
{
rxIndex = 0;
_delay(50);
MYSERIAL.flush(); //clear RX buffer
SERIAL_ECHOLNRPGM(PSTR(";S"));
while (rxIndex < 19)
{
if (timeout.expired(250u))
goto exit;
if (MYSERIAL.available() > 0)
{
SN[rxIndex] = MYSERIAL.read();
rxIndex++;
}
if (timeout.expired(100u)) break;
}
SN[numbersRead] = 0;
SN[rxIndex] = 0;
// printf_P(PSTR("SN:%s\n"), SN);
SN_valid = (strncmp_P(SN, PSTR("CZPX"), 4) == 0);
}
exit:
selectedSerialPort = selectedSerialPort_bak;
return (numbersRead == 19);
return !SN_valid;
}
//! Detection of faulty RAMBo 1.1b boards equipped with bigger capacitors
//! at the TACH_1 pin, which causes bad detection of print fan speed.