I have been using this same processor for the past 6 years. In all that time I have never used the Power Manager in ASF to set up my clocks, but rather System Clock Services. I even posted a how to in May of 2017 (https://www.avrfreaks.net/forum/...). But for some reason, the good times are over. I cannot get past the dreaded PLL not Locked.
I have tried previous software projects that worked before, I have tried different processor boards - some used to work, I just made two new ones - one failed immediately, the other ran for a while before it started failing.
I like using System Clock Services - it is easy to understand - setup the clock values in conf_clock.h and call sysclk_init(); No mess, no fuss - and now no PLL LOCK!
Here is the code I am using:
//conf_clock.h set cpu to 66 MHz
#ifndef CONF_CLOCK_H_INCLUDED
#define CONF_CLOCK_H_INCLUDED
#define CONFIG_SYSCLK_SOURCE SYSCLK_SRC_PLL0
/* Fbus = Fsys / (2 ^ BUS_div) */
#define CONFIG_SYSCLK_CPU_DIV 0
#define CONFIG_SYSCLK_PBA_DIV 0
#define CONFIG_SYSCLK_PBB_DIV 0
#define CONFIG_USBCLK_SOURCE USBCLK_SRC_PLL1
#define CONFIG_USBCLK_DIV 1
#define CONFIG_PLL0_SOURCE PLL_SRC_OSC0
#define CONFIG_PLL0_MUL 16 //(48000000UL / BOARD_OSC0_HZ)
#define CONFIG_PLL0_DIV 3
#define CONFIG_PLL1_SOURCE PLL_SRC_OSC0
#define CONFIG_PLL1_MUL (48000000UL / BOARD_OSC0_HZ)
#define CONFIG_PLL1_DIV 1
#endif /* CONF_CLOCK_H_INCLUDED */
-----------------------------------------------------------
//user_board.h
#ifndef USER_BOARD_H
#define USER_BOARD_H
#include <conf_board.h>
/* Clock Speed */
#define APPLI_CPU_SPEED 66000000
#define APPLI_PBA_SPEED 66000000
/* These are documented in services/basic/clock/uc3b0_b1/osc.h */
#define BOARD_OSC0_HZ 12000000
#define BOARD_OSC0_STARTUP_US 17000
#define BOARD_OSC0_IS_XTAL true
#define BOARD_OSC32_HZ 32768
#define BOARD_OSC32_STARTUP_US 71000
#define BOARD_OSC32_IS_XTAL true
#define FOSC0 12000000
#define CLOCK_PBA_FREQ 66000000
#define Test_Pin AVR32_PIN_PA19
#endif // USER_BOARD_H
--------------------------------------------------------------------------
//init.c
#include <asf.h>
#include <board.h>
#include <conf_board.h>
#include <user_board.h>
void IO_Init(void);
void board_init(void)
{
sysclk_init();
gpio_local_init();
IO_Init();
}
void IO_Init(void)
{
gpio_local_enable_pin_output_driver(Test_Pin);
}
-----------------------------------------------------------------
//main.c
#include <asf.h>
#include <user_board.h>
int main (void)
{
int c;
flash_set_wait_state(1);
board_init();
while (1)
{
gpio_local_tgl_pin(Test_Pin);
}
}
As I mentioned - one of the new assembled boards ran for a while before failing to the no PLL - the output pin was producing a waveform with a 90ns pulse.
The only thing I have not tried is changing the JTAGICE - I have a second one, so I guess I should give it a try since I have been using the current one for 5 years - that would eliminate one more possibility.
I, as always, would welcome some thoughts on this strange, fustrating, problem.
Kind regards,
David
