Hardware Design: SIE

Hardware Design: SIE Git Source Tree

1	/**
2	* Primitive first stage bootloader
3	*
4	*
5	*/
6	#include "soc-hw.h"
7
8	/* prototypes */
9	uint32_t read_uint32()
10	{
11	uint32_t val = 0, i;
12
13	for (i = 0; i < 4; i++) {
14	val <<= 8;
15	val += (uint8_t)uart_getchar();
16	}
17
18	return val;
19	}
20
21	int main(int argc, char **argv)
22	{
23	int8_t *p;
24	uint8_t c;
25
26	// Initialize UART
27	uart_init();
28
29	c = '*'; // print msg on first iteration
30	for(;;) {
31	uint32_t start, size;
32
33	switch (c) {
34	case 'u': // upload
35	start = read_uint32();
36	size = read_uint32();
37	for (p = (int8_t ) start; p < (int8_t ) (start+size); p++)
38	*p = uart_getchar();
39	break;
40	case 'd': // download
41	start = read_uint32();
42	size = read_uint32();
43	for (p = (int8_t ) start; p < (int8_t ) (start+size); p++)
44	uart_putchar( *p );
45	break;
46	case 'g': // goto
47	start = read_uint32();
48	jump(start);
49	break;
50	default:
51	uart_putstr("SAKC/bootloader > \r\n");
52	break;
53	};
54	c = uart_getchar();
55	}
56	}
57
58

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