Edit: I have resolved the issue. I had to go to to "Project -> Manage -> Select Software Packs..." and enable ARM_Compiler. After that, I had to go to "Run-Time Environment" and set "Compiler->I/O->STDOUT" to ITM.
Hi,
I am trying to get UART communication working using the PDL version 2.1.0.
I have attached a simple program. The program is a slightly modified version of the one provided in the official example for using the PDL library on an S6E2GM device. I will attach that program as well. I have taken care to include and add all files that were used in the example project.
When I download the program, the output pin P1B should get initialized to HIGH, and I should continuously be getting the message "Hello\n" on my serial connection. Instead, nothing happens.
If I run the debugger and press Run, the program pauses at a BKPT instruction as shown below. I would then have to press Run 2 more times for the program to run and keep running without any further pauses. Then I connect a serial terminal (Termite) and I continuously receive the text "Hello" in it, as expected. Also, it seems that the breakpoints happen before the program enters the main function.
0x00001CDC BEAB BKPT 0xAB
If I remove printf and replace it with fputc('a', NULL) provided by the PDL, I get the behavior that is expected from such modified program.
What could be causing this?
main.c:
#include "pdl_header.h"
int main(void)
{
Uart_Io_Init();
Gpio1pin_InitOut(GPIO1PIN_P1B, Gpio1pin_InitVal(1u));
printf("Hello\n");
while(1) {}
}
main.c from the official example:
#include "pdl_header.h"
int main(void)
{
Uart_Io_Init();/* Initializatio of the UART unit and GPIO used in the communication */
printf("Welcome to use Cypress PDL 2.1!\n");
while(1)
{
/* Data is normally sent and received */
}
}
