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Update IO_I2CRailcom.h

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Build a new RC sensor, now receive RC RX data in UART, but it looks the UART REG_LVL is read out of sync with the cutout. Sent traces to Chris, and the sensor will follow asap
This commit is contained in:
kempe63 2024-10-13 15:54:33 +01:00
parent 0a07405b46
commit 2b3002b0d8
1 changed files with 37 additions and 23 deletions
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60
IO_I2CRailcom.h
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@ -89,14 +89,12 @@ public:
if (!exists) return;
_UART_CH=0;
Init_SC16IS752(); // Initialize UART0
// HK: currently fixed on CH 0
/*
Init_SC16IS752(); // Initialize UART0
if (_nPins>1) {
_UART_CH=1;
Init_SC16IS752(); // Initialize UART1
}
*/
if (_deviceState==DEVSTATE_INITIALISING) _deviceState=DEVSTATE_NORMAL;
_display();
}
@ -110,26 +108,17 @@ public:
if (!DCCWaveform::isRailcomSampleWindow()) return;
// flip channels each loop
_UART_CH=0; // Fix _UART_CH to 0 for now
//if (_nPins>1) _UART_CH=_UART_CH?0:1;
_UART_CH=0;
if (_nPins>1) _UART_CH=_UART_CH?0:1;
// Read incoming raw Railcom data, and process accordingly
// HK: Read Line Status register first, if bit 7 set we have a FIFO error, need to clear the FIFO and ignore any data and wait for the next cycle
auto reg_data = UART_ReadRegister(REG_LSR);
//DIAG(F("Railcom: LSR: %s/%d, Val: 0x%x"), _I2CAddress.toString(), _UART_CH, reg_data);
if (reg_data & 0x80 ){ // Check bit 7 of LSR, if there is a FIFO error
DIAG(F("Railcom: LSR: %s/%d, Val: 0x%x"), _I2CAddress.toString(), _UART_CH, reg_data);
UART_WriteRegister(REG_FCR, 0x07,false);
}
auto inlength = UART_ReadRegister(REG_RXLV);
//DIAG(F("Railcom: %s/%d RX Fifo lvl: %d"),_I2CAddress.toString(), _UART_CH, inlength);
if (inlength==0){
return;
} else {
#ifdef DIAG_I2CRailcom
DIAG(F("Railcom: %s/%d RX Fifo: %d"),_I2CAddress.toString(), _UART_CH, inlength);
DIAG(F("Railcom: %s/%d RX Fifo length: %d"),_I2CAddress.toString(), _UART_CH, inlength);
#endif
_outbuf[0]=(byte)(REG_RHR << 3 | _UART_CH << 1);
I2CManager.read(_I2CAddress, _inbuf, inlength, _outbuf, 1);
@ -143,12 +132,8 @@ public:
#endif
}
#ifdef DIAG_I2CRailcom
DIAG(F("Railcom: %s/%d RX Fifo: %d"),_I2CAddress.toString(), _UART_CH, inlength);
#endif
// Ask UART for the data
_outbuf[0]=(byte)(REG_RHR << 3 | _UART_CH << 1);
I2CManager.read(_I2CAddress, _inbuf, inlength, _outbuf, 1);
@ -176,6 +161,8 @@ public:
// new loco, if any, is entering block
_locoInBlock[_UART_CH]=locoid;
if (locoid) RMFT3::blockEvent(_firstVpin+_UART_CH,locoid,true);
UART_WriteRegister(REG_FCR, 0x07,false); // HK: Reset FIFO at end of read cycle
}
@ -253,14 +240,41 @@ private:
UART_WriteRegister(REG_FCR, 0x07,false); // Reset FIFO, clear RX & TX FIFO (write only)
// Sent some data to check if UART baudrate is set correctly
#ifdef DIAG_I2CRailcom
// HK: Test to see if internal loopback works and if REG_RXLV increment to at least 0x01
// Set REG_MCR bit 4 to 1, Enable Loopback
UART_WriteRegister(REG_MCR, 0x10);
UART_WriteRegister(REG_THR, 0x88, false); // Send 0x88
auto inlen = UART_ReadRegister(REG_RXLV);
if (inlen == 0){
DIAG(F("I2CRailcom: Loopback test: %s/%d failed"),_I2CAddress.toString(), _UART_CH);
} else {
DIAG(F("Railcom: Loopback test: %s/%d RX Fifo lvl: 0x%x"),_I2CAddress.toString(), _UART_CH, inlen);
_outbuf[0]=(byte)(REG_RHR << 3 | _UART_CH << 1);
I2CManager.read(_I2CAddress, _inbuf, inlen, _outbuf, 1);
#ifdef DIAG_I2CRailcom_data
DIAG(F("Railcom: Loopback test: %s/%d RX FIFO Data"), _I2CAddress.toString(), _UART_CH);
for (int i = 0; i < inlen; i++){
DIAG(F("Railcom: Loopback data [0x%x]: 0x%x"), i, _inbuf[i]);
//DIAG(F("[0x%x]: 0x%x"), i, _inbuf[i]);
}
#endif
}
UART_WriteRegister(REG_MCR, 0x00); // Set REG_MCR back to 0x00
#endif
#ifdef DIAG_I2CRailcom
// Sent some data to check if UART baudrate is set correctly, check with logic analyzer on TX pin
UART_WriteRegister(REG_THR, 9, false);
DIAG(F("I2CRailcom: UART %s/%d Test TX = 0x09"),_I2CAddress.toString(), _UART_CH);
#endif
if (_deviceState==DEVSTATE_INITIALISING) {
DIAG(F("I2CRailcom: UART %d init complete"),_UART_CH);
}
// HK: final FIFO reset
UART_WriteRegister(REG_FCR, 0x07,false); // Reset FIFO, clear RX & TX FIFO (write only)
}