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#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "ch573/gpio.h"
#include "ch573/pwr.h"
#include "ch573/uart.h"
#include "isr_vector.h"
#include "panic.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
void stack_dump(uint32_t*);
void print_hex(uint32_t x);
int uart1_FILE_put(char ch, FILE* f)
{
if (ch == '\n') {
uart1_FILE_put('\r', f);
}
while (!UART.lsr.thr_empty.get(UART1));
UART.thr.set(UART1, ch);
return 1;
}
static int uart1_FILE_get(FILE* f)
{
return -1;
}
static int uart1_FILE_flush(FILE* f)
{
return 0;
}
FILE _uart1_FILE = (FILE){
.put = uart1_FILE_put,
.get = uart1_FILE_get,
.flush = uart1_FILE_flush,
.flags = __SWR,
};
FILE* const stdout = &_uart1_FILE;
// FILE* const stdout = &_uart1_FILE;
/*
* Function which delays for a bit.
*/
void delay(void);
int 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;
#define gpio_usart1_tx_pin 9
#define gpio_usart1_rx_pin 8
const char* hello_world_static = "Hello, World!\r\n";
#define BAUD_RATE 115200
int test(char ch, ...);
/* Main routine. This is called on_reset once everything else has been set up.
*/
int 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);
GPIO_PORT.dir.set(GPIO_PORT_A, DIR_OUT, 8);
GPIO_PORT.pd_drv.set(GPIO_PORT_A, 0, 8);
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);
volatile uint32_t dl = (10 * 6400000 / 8 / BAUD_RATE + 5) / 10;
UART.dl.set(UART1, dl);
char buf[32] = { 0 };
volatile uint32_t i = 0xdeadbeef;
panic(0xdeadbeef);
stack_dump(&i);
print_hex(i);
stdout->put('a', NULL);
stdout->put('\n', NULL);
fputs("bulitin fputs\n", stdout);
puts("bulitin puts\n");
while (1) {
fprintf(stdout, "Hello! %% %s\n", "Josh");
fputs(buf, &_uart1_FILE);
delay();
}
// printf("Hello: %s\n", hello_world_static);
// printf("Here's deadbeef: %08x\n", deadbeef);
for (;;);
return 0;
}
IRQ(systick)
{
collatz(5);
}
#define putch(c) uart1_FILE_put(c, NULL)
void print_binary(uint32_t x)
{
int i = 0;
while (i < 32) {
int msb = (x & 0x80000000) >> 31;
x <<= 1;
if (msb) {
uart1_FILE_put('1', NULL);
} else {
uart1_FILE_put('0', NULL);
}
i++;
}
}
void print_hex(uint32_t x)
{
int i = 0;
while (i < 8) {
int ms = (x & 0xf0000000) >> 28;
x <<= 4;
if (ms < 10) {
putch('0' + ms);
} else {
putch('a' + (ms - 10));
}
++i;
}
}
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