First, you need to setup a DT_INTS-18 interrupt for the HLVD module. You can find DT_INTS-18 version 3.4 here: http://www.picbasic.co.uk/forum/show...2826#post82826
ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? ;INT_Handler USB_Handler INT_Handler HLVD_INT, _LowVolt, PBP, yes endm INT_CREATE ; Creates the interrupt processor ENDASM
Then you need to insert this code in your main program loop to setup the use of the HLVD module.
' Set registers for using HLVD feature per section 24.2 of the 18F4550 data sheet ' Step 1-Disable the module by clearing HLVDCON.4 HLVDCON.4 = 0 ' Implement Step 1 ' Step2 HLVD3:HLVDL0=1101 'Set the trip point at Vdd=4.33 vdc ' Step3 HLVDCON.7=0 'Set VDIRMAG=0 to detect low voltage transition ' Step4 HLVDCON.4=1 'Enable the HLVD module HLVDCON = %00011101 'Implements Steps 2-4 ' Clear the HLVDIF interrupt flag (PIR2<2>) PIR2.2 = 0
LowVolt: ' Blink LED_RED 5X to indicate Low Battery voltage detected For i = 0 to 4 HIGH LED_RED Pause 500 LOW LED_RED PAUSE 500 Next @ INT_DISABLE HLVD_INT ; This statement very important, else code will lockup on exit ; from the ISR to main program. ' Resume Main Program @ INT_RETURN '------------------{ End of Interrupt Handlers }-------------------------
@ INT_ENABLE HLVD_INT ; enable HLVD interrupt
Re: SERIN2 Receiving Wrong Data
The sending device has the typical 18F4550 USB setup and it is set to "Define OSC 48". The receiving device is set to "DEFINE OSC 16".
rsocor01 Yesterday, 19:56