static int clock_tests(int argc, cmd_args *argv)
{
if (argc < 2) {
printf("not enough arguments:\n");
printf("%s <clock-name>\n", argv[0].str);
printf("%s ?\n", argv[0].str);
goto out;
}
if(argv[1].str[0] == '?')
print_clock_list();
else
clock_measure(argv[1].str);
out:
return 0;
}
/**
* \brief main function
*/
int main(void)
{
static const gpio_map_t USART_GPIO_MAP = {
{EXAMPLE_USART_RX_PIN, EXAMPLE_USART_RX_FUNCTION},
{EXAMPLE_USART_TX_PIN, EXAMPLE_USART_TX_FUNCTION}
};
// USART options
static const usart_options_t USART_OPTIONS = {
.baudrate = 57600,
.charlength = 8,
.paritytype = USART_NO_PARITY,
.stopbits = USART_1_STOPBIT,
.channelmode = 0
};
#if BOARD == UC3L_EK
scif_osc32_opt_t opt_osc32 = {
// 2-pin Crystal and high current mode
SCIF_OSC_MODE_2PIN_CRYSTAL_HICUR,
// oscillator startup time
AVR32_SCIF_OSCCTRL32_STARTUP_0_RCOSC,
/*
* select the alternate xin32_2 and xout32_2 for the
* 32kHz crystal oscillator
*/
true,
// disable the 1kHz output
false,
// enable the 32kHz output
true
};
#else
scif_osc32_opt_t opt_osc32 = {
// 2-pin crystal mode
.mode = SCIF_OSC_MODE_2PIN_CRYSTAL,
// startup time
.startup = AVR32_SCIF_OSCCTRL32_STARTUP_0_RCOSC
};
#endif
// Set system clock
sysclk_init();
// Start OSC_32KHZ
scif_start_osc32(&opt_osc32,true);
// Assign GPIO pins to USART0.
gpio_enable_module(USART_GPIO_MAP,
sizeof(USART_GPIO_MAP) / sizeof(USART_GPIO_MAP[0]));
// Initialize USART in RS232 mode
usart_init_rs232(EXAMPLE_USART, &USART_OPTIONS, FPBA);
// Welcome message
usart_write_line(EXAMPLE_USART, "\x1B[2J\x1B[H\r\nATMEL\r\n");
usart_write_line(EXAMPLE_USART, "AVR UC3 - FREQM example\r\n");
#ifndef INTERRUPT_MODE_SUPPORT
uint32_t result;
status_code_t status;
uint32_t duration = 128;
usart_write_line(EXAMPLE_USART, "/*** Normal Mode ***/\r\n");
freqm_enable();
status = freqm_write_config(AVR32_FREQM_REF_OSC32, AVR32_FREQM_CPU,
duration);
if (status == ERR_TIMEOUT) {
usart_write_line(EXAMPLE_USART, "FREQM Module Config Fail!");
while(true);
}
result = clock_measure();
usart_write_line(EXAMPLE_USART, "CPU Clock:\r\n");
display_result(OSC32K_FREQ_HZ, duration, result);
usart_write_line(EXAMPLE_USART, "HSB Clock:\r\n");
freqm_set_clock_source(AVR32_FREQM_HSB);
result = clock_measure();
display_result(OSC32K_FREQ_HZ, duration, result);
usart_write_line(EXAMPLE_USART, "PBA Clock:\r\n");
freqm_set_clock_source(AVR32_FREQM_PBA);
result = clock_measure();
display_result(OSC32K_FREQ_HZ, duration, result);
usart_write_line(EXAMPLE_USART, "PBB Clock:\r\n");
freqm_set_clock_source(AVR32_FREQM_PBB);
result = clock_measure();
display_result(OSC32K_FREQ_HZ, duration, result);
pm_set_clk_domain_div(PM_CLK_DOMAIN_3,PM_CKSEL_DIVRATIO_16);
usart_write_line(EXAMPLE_USART, "PBB Clock(Main clock/16):\r\n");
freqm_set_clock_source(AVR32_FREQM_PBB);
result = clock_measure();
display_result(OSC32K_FREQ_HZ, duration, result);
usart_write_line(EXAMPLE_USART, "Test Complete!\r\n");
while (true) {
/*
* Force a NOP instruction for an eventual placement of a debug
* session breakpoint.
*/
asm("nop\n");
}
#else
INTC_init_interrupts();
INTC_register_interrupt(&freqm_int_handler, AVR32_FREQM_IRQ,
AVR32_INTC_INT0);
freqm_enable_measurement_done_int();
cpu_irq_enable();
usart_write_line(EXAMPLE_USART, "/*** Interrupt Mode ***/\r\n");
uint32_t duration = 128;
uint32_t result;
status_code_t status;
freqm_enable();
status = freqm_write_config(AVR32_FREQM_REF_OSC32, AVR32_FREQM_CPU,
duration);
if (status == ERR_TIMEOUT) {
usart_write_line(EXAMPLE_USART, "FREQM Module Config Fail!");
while(true);
}
freqm_start();
while(true) {
if(flag == 0) {
result =(uint32_t)(((F32)value / duration)
* OSC32K_FREQ_HZ);
usart_write_line(EXAMPLE_USART, "CPU Clock:\r\n");
display_result(OSC32K_FREQ_HZ, duration, result);
usart_write_line(EXAMPLE_USART, "Test Complete!\r\n");
flag = 1;
}
/*
* Force a NOP instruction for an eventual placement of a debug
* session breakpoint.
*/
asm("nop\n");
};
#endif
return 0;
}
