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#include <stdint.h>
#include "ch573/gpio.h"
#include "ch573/uart.h"
#include "ch573/pwr.h"
#include "isr_vector.h"
#define GPIO_PORT_A ch573_gpio__gpio_port_a
#define GPIO_PORT CH573_GPIO__GPIO_PORT_T_INTF
#define UART1 ch573_uart__uart1
#define UART CH573_UART__UART_T_INTF
#define PWR1 ch573_pwr__pwr_mgmt
#define PWR CH573_PWR__PWR_MGMT_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;
#define gpio_usart1_tx_pin 9
#define gpio_usart1_rx_pin 8
const char* hello_world = "Hello, World!\r\n";
#define BAUD_RATE 115200
/* 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, gpio_usart1_tx_pin);
GPIO_PORT.pd_drv.set(GPIO_PORT_A, 0, gpio_usart1_tx_pin);
UART.div.set(UART1, 1);
UART.fcr.set(UART1, 0x07);
UART.ier.txd_en.set(UART1, ON);
UART.lcr.word_sz.set(UART1, WORD_SZ_8_BITS);
uint32_t dl = (10 * 6400000 / 8 / BAUD_RATE + 5) / 10;
UART.dl.set(UART1, dl);
// PWR.slp_clk_off_0.uart1.set(PWR1, CLK_SOURCE_ENABLED);
const char* ptr = hello_world;
while (1) {
if (*ptr == 0) {
ptr = hello_world;
}
while (!UART.lsr.thr_empty.get(UART1));
UART.thr.set(UART1, *(ptr++));
}
}
IRQ(systick)
{
collatz(5);
}
IRQ(exc)
{
}
IRQ(nmi)
{
}
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