/**
* \brief Recursively calculate the nth Fibonacci number.
*
* \param n Indicates which (positive) Fibonacci number to compute.
*
* \return The nth Fibonacci number.
*/
static uint32_t recfibo(uint32_t n)
{
if (n == 0 || n == 1) {
return n;
}
return recfibo(n - 2) + recfibo(n - 1);
}
/**
* \brief The main function.
*/
int main(void)
{
/* Initialize the SAM system */
sysclk_init();
board_init();
/* Initialize the console */
configure_console();
/* Output example information */
printf("-- CMCC Example --\r\n");
printf("-- %s\n\r", BOARD_NAME);
printf("-- Compiled: %s %s --\n\r", __DATE__, __TIME__);
/* Enable the CMCC module. */
cmcc_get_config_defaults(&g_cmcc_cfg);
cmcc_init(CMCC_BASE, &g_cmcc_cfg);
cmcc_enable(CMCC_BASE);
/* Do the Fibonacci calculation. */
recfibo(FIBONACCI_NUM);
printf("Fibonacci calculation completed \r\n");
printf("Cache Data hit: %ld \r\n", cmcc_get_monitor_cnt(CMCC_BASE));
while (true) {
}
}
/**
* \brief Reconfigure serial console.
*/
static void reconfigure_com_port(void)
{
const sam_usart_opt_t opt = {
.baudrate = CONF_UART_BAUDRATE,
.char_length = CONF_UART_CHAR_LENGTH,
.parity_type = CONF_UART_PARITY,
.stop_bits = CONF_UART_STOP_BITS,
.channel_mode = US_MR_CHMODE_NORMAL,
.irda_filter = 0,
};
usart_init_rs232(CONF_UART, &opt, LOWER_SYS_CLK);
usart_enable_tx(CONF_UART);
}
/**
* \brief Recursively calculate the nth Fibonacci number.
*
* \param n Indicates which (positive) Fibonacci number to compute.
*
* \return The nth Fibonacci number.
*/
static uint32_t recfibo(uint32_t n)
{
if (n == 0 || n == 1) {
return n;
}
return recfibo(n - 2) + recfibo(n - 1);
}
/**
* \brief This is an example demonstrating Fibonacci calculation
* with and without PicoCache.
*
* \param caption Caption to print before running the example.
* \param pico_enable Enable PicoCache or not.
*/
static void flash_picocache_example(const char *caption, bool pico_enable)
{
uint32_t tick_start, time_ms;
printf("\n\r--------------\n\r%s\n\r", caption);
/* Enable PicoCache if required */
if (pico_enable) {
flashcalw_picocache_enable();
flashcalw_picocache_set_monitor_mode(HCACHE_MCFG_MODE_IHIT);
flashcalw_picocache_enable_monitor();
flashcalw_picocache_reset_monitor();
} else {
flashcalw_picocache_disable();
flashcalw_picocache_disable_monitor();
}
/* Get current time tick */
tick_start = time_tick_get();
/* Do the Fibonacci calculation. */
recfibo(FIBONACCI_NUM);
/* Calculate the Fibonacci spent time */
time_ms = time_tick_calc_delay(tick_start, time_tick_get());
if (time_ms) {
printf("Time spent: %u ms\r\n", (unsigned int)time_ms);
}
/* Display cache hit counter */
if (pico_enable) {
printf("Pico cache instruction hit: %u \r\n",
(unsigned int)flashcalw_picocache_get_monitor_cnt());
}
}
