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#include <stdint.h>
#include "isr_vector.h"
#include "ch573/gpio.h"
#define GPIO_PORT_A ch573_gpio__gpio_port_a
#define GPIO_PORT CH573_GPIO__GPIO_PORT_T_INTF
/*
* Function which delays for a bit.
*/
void delay(void);
void main(void);
uint32_t collatz(uint32_t n)
{
uint32_t c = 0;
while (n > 1) {
if (n % 2 == 0) {
n /= 2;
} else {
n = n * 3 + 1;
}
c++;
}
return c;
}
void blink_n(int n)
{
uint32_t bit = 1 << 8;
while (n > 0) {
GPIO_PORT.out.set(GPIO_PORT_A, OFF, 8);
delay();
GPIO_PORT.out.set(GPIO_PORT_A, ON, 8);
delay();
--n;
}
}
void delay(void)
{
for (volatile uint32_t i = 0; i < 10000; ++i) {
asm volatile("");
}
}
volatile uint32_t deadbeef = 0xdeadbeef;
// Memory-mapped address of the data values in flash.
extern uint32_t DATA_VALUES_IN_FLASH;
// Where the data is located in sram.
extern uint32_t DATA_SEGMENT_START;
extern uint32_t DATA_SEGMENT_STOP;
/* Main routine. This is called on_reset once everything else has been set up.
*/
void main(void)
{
GPIO_PORT.dir.set(GPIO_PORT_A, DIR_OUT, 8);
GPIO_PORT.pd_drv.set(GPIO_PORT_A, PD_DRV_OPEN_DRAIN, 8);
for (;;) {
if (deadbeef == 0xdeadbeef) {
GPIO_PORT.out.set(GPIO_PORT_A, ON, 8);
}
delay();
delay();
delay();
GPIO_PORT.out.set(GPIO_PORT_A, OFF, 8);
delay();
}
}
IRQ(systick) {
collatz(5);
}
IRQ(exc) {}
IRQ(nmi) {}
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