Post Created date
Power BJT strange functioning - am I doing something wrong?
Looking at the "Safe Operating Areas" chart 20V at 7A is outside the DC region. That '250W' rating is an "Absolute Maximum Rating"
Thursday, 23 July 2020 - 03:34
EXTINT[0] (NMI) - How to recover
Table 2.4 in section 2.5 ("Entry and Exit Mechanism" ) of the UC3 Architechure Document says to use rete to return from the NMI exception.
Friday, 10 July 2020 - 00:34
UC3C AST - When enable the AST its busy flag remains busy
There are 3 failsafe timeout-loops in ast_init_counter(,,,) One of them is causing ast_init_counter(,,,) to return 'false' and that will then cause ast_enable() to stall. ( Line...
Thursday, 2 July 2020 - 22:46
Store UART Data in Char Array and display to PC
uart_sTxString(data_in); is a problem waiting to happen, because the received 'string' in data_in[] is never explicitlty terminated with a null ('\0').
Sunday, 28 June 2020 - 05:28
UC3C AST - When enable the AST its busy flag remains busy
From the locked (why?), thread Quote: // ... do something after sleep cpu_delay_ms(3000, FCPU_HZ);Sleep mode 'STOP' will stop the SYSTIMER counter which is used by...
Thursday, 25 June 2020 - 03:06
UC3C AST - When enable the AST its busy flag remains busy
Does scif_start_osc32(,) return zero ? (-1 is a problem) Does ast_init_counter(,,,) return 'true' ( false means a problem)
Thursday, 25 June 2020 - 00:41
Problem with pointers and semaphores for a multitasking scheduler (ATmega328p)
Have you tried the following ? OSwait( &sem ); printf("task 1"); Ossignal( &sem );
Wednesday, 3 June 2020 - 00:43
esp8266 AT commands embedded code
When you send a command to the ESP8266 it sends a reply. If your receive code is too slow to read the UDRn to get the characters in that reply then a Data Overrun error will occur...
Sunday, 31 May 2020 - 01:54
Is FatFS file system robust?
Quote:When interrupts occurred during SD writes, it would clear the spif flag, That should only happen if you are using the SPIF interrupt, or if code in your other interrupts is...
Saturday, 16 May 2020 - 01:10
Program Counter on Bus Error and RAR_EX in AVR UC3
The default exception handler in exception.s just does an endless loop at the exception entry point ...<br /> .org 0x008<br /> // Bus Error Data Fetch.<br />...
Thursday, 14 May 2020 - 06:33
bizzaro interrupt behavior
Figure 12 in the datasheet show that XERR can pulse. Are you regularly updating the LEDs every 45ms ? When you disconnect the TLC5940 XERR line to the Mega1284 is the pullup...
Monday, 4 May 2020 - 00:42
[Help] The PWM output on OC2A is controlled by the data value written to the OCR2A register.
If you want a 'one-shot' change-of-state event you should ; 1: define a 'change-of-state' flag, 2: after changing the ADC channel set that flag to 'true', 3: somewhere else in...
Sunday, 12 April 2020 - 00:23