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Neal Probert
2021-01-22 10:11:21 -05:00
parent d46bf141a3
commit a9cbd4dac0
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SoftwareDefined/HackRF/hackrf-2015.07.2/firmware/startup_systick_perfo/startup_systick.c Normal file
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/*
* Copyright 2010 - 2012 Michael Ossmann
*
* This file is part of HackRF.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include <libopencm3/lpc43xx/gpio.h>
#include <libopencm3/lpc43xx/scu.h>
#include <libopencm3/lpc43xx/i2c.h>
#include <libopencm3/lpc43xx/m4/nvic.h>
#include <libopencm3/cm3/systick.h>
#include <libopencm3/cm3/scs.h>
#include "hackrf_core.h"
/* Global counter incremented by SysTick Interrupt each millisecond */
volatile uint32_t g_ulSysTickCount;
uint32_t g_NbCyclePerSecond;
void systick_setup(void)
{
uint32_t systick_reload_val;
g_ulSysTickCount = 0;
/* Disable IRQ globally */
__asm__("cpsid i");
/* Set processor Clock as Source Clock */
systick_set_clocksource(STK_CTRL_CLKSOURCE);
/* Get SysTick calibration value to obtain by default 1 tick = 10ms */
systick_reload_val = systick_get_calib();
/*
* Calibration seems wrong on LPC43xx(TBC) for default Freq it assume System Clock is 12MHz but it is 12*17=204MHz
* Fix the Calibration value bu multiplication by 17
*/
systick_reload_val = (systick_reload_val*17);
/* To obtain 1ms per tick just divide by 10 the 10ms base tick and set the reload */
systick_reload_val = systick_reload_val/10;
systick_set_reload(systick_reload_val);
systick_interrupt_enable();
/* Start counting. */
systick_counter_enable();
/* Set SysTick Priority to maximum */
nvic_set_priority(NVIC_SYSTICK_IRQ, 0xFF);
/* Enable IRQ globally */
__asm__("cpsie i");
}
void scs_dwt_cycle_counter_enabled(void)
{
SCS_DEMCR |= SCS_DEMCR_TRCENA;
SCS_DWT_CTRL |= SCS_DWT_CTRL_CYCCNTENA;
}
uint32_t sys_tick_get_time_ms(void)
{
return g_ulSysTickCount;
}
uint32_t sys_tick_delta_time_ms(uint32_t start, uint32_t end)
{
#define MAX_T_U32 ((2^32)-1)
uint32_t diff;
if(end > start)
{
diff=end-start;
}else
{
diff=MAX_T_U32-(start-end)+1;
}
return diff;
}
void sys_tick_wait_time_ms(uint32_t wait_ms)
{
uint32_t start, end;
uint32_t tickms;
start = sys_tick_get_time_ms();
do
{
end = sys_tick_get_time_ms();
tickms = sys_tick_delta_time_ms(start, end);
}while(tickms < wait_ms);
}
/* Called each 1ms/1000Hz by interrupt
1) Count the number of cycle per second.
2) Increment g_ulSysTickCount counter.
*/
void sys_tick_handler(void)
{
if(g_ulSysTickCount==0)
{
/* Clear Cycle Counter*/
SCS_DWT_CYCCNT = 0;
}else if(g_ulSysTickCount==1000)
{
/* Capture number of cycle elapsed during 1 second */
g_NbCyclePerSecond = SCS_DWT_CYCCNT;
}
g_ulSysTickCount++;
}
uint32_t nb_inst_per_sec[16];
extern uint32_t test_nb_instruction_per_sec_100_nop_asm();
extern uint32_t test_nb_instruction_per_sec_105_nop_asm();
extern uint32_t test_nb_instruction_per_sec_110_nop_asm();
extern uint32_t test_nb_instruction_per_sec_115_nop_asm();
extern uint32_t test_nb_instruction_per_sec_120_nop_asm();
extern uint32_t test_nb_instruction_per_sec_150_nop_asm();
extern uint32_t test_nb_instruction_per_sec_200_nop_asm();
extern uint32_t test_nb_instruction_per_sec_1000_nop_asm();
#define LED1_TOGGLE() (gpio_toggle(PORT_LED1_3, (PIN_LED1)))
int main(void)
{
pin_setup();
enable_1v8_power();
cpu_clock_init();
scs_dwt_cycle_counter_enabled();
systick_setup();
gpio_clear(PORT_LED1_3, (PIN_LED1)); /* LED1 off */
/* Test number of instruction per second (MIPS) slow blink ON 1s, OFF 1s */
LED1_TOGGLE();
nb_inst_per_sec[0] = test_nb_instruction_per_sec_100_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[1]= test_nb_instruction_per_sec_105_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[2]= test_nb_instruction_per_sec_110_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[3]= test_nb_instruction_per_sec_115_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[4] = test_nb_instruction_per_sec_120_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[5] = test_nb_instruction_per_sec_150_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[6] = test_nb_instruction_per_sec_200_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[7] = test_nb_instruction_per_sec_1000_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[8] = test_nb_instruction_per_sec_100_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[9]= test_nb_instruction_per_sec_105_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[10]= test_nb_instruction_per_sec_110_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[11]= test_nb_instruction_per_sec_115_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[12] = test_nb_instruction_per_sec_120_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[13] = test_nb_instruction_per_sec_150_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[14] = test_nb_instruction_per_sec_200_nop_asm();
LED1_TOGGLE();
nb_inst_per_sec[15] = test_nb_instruction_per_sec_1000_nop_asm();
LED1_TOGGLE();
/* Test finished fast blink */
while (1)
{
gpio_set(PORT_LED1_3, (PIN_LED1)); /* LED1 on */
gpio_set(PORT_LED1_3, (PIN_LED2)); /* LED2 on */
gpio_set(PORT_LED1_3, (PIN_LED3)); /* LED3 on */
sys_tick_wait_time_ms(250);
gpio_clear(PORT_LED1_3, (PIN_LED3)); /* LED3 off */
gpio_clear(PORT_LED1_3, (PIN_LED2)); /* LED2 off */
gpio_clear(PORT_LED1_3, (PIN_LED1)); /* LED1 off */
sys_tick_wait_time_ms(250);
}
return 0;
}