mirror of
git://projects.qi-hardware.com/nn-usb-fpga.git
synced 2025-01-09 23:00:14 +02:00
58 lines
1021 B
C
58 lines
1021 B
C
/**
|
|
* Primitive first stage bootloader
|
|
*
|
|
*
|
|
*/
|
|
#include "soc-hw.h"
|
|
|
|
/* prototypes */
|
|
uint32_t read_uint32()
|
|
{
|
|
uint32_t val = 0, i;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
val <<= 8;
|
|
val += (uint8_t)uart_getchar();
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int8_t *p;
|
|
uint8_t c;
|
|
|
|
// Initialize UART
|
|
uart_init();
|
|
|
|
c = '*'; // print msg on first iteration
|
|
for(;;) {
|
|
uint32_t start, size;
|
|
|
|
switch (c) {
|
|
case 'u': // upload
|
|
start = read_uint32();
|
|
size = read_uint32();
|
|
for (p = (int8_t *) start; p < (int8_t *) (start+size); p++)
|
|
*p = uart_getchar();
|
|
break;
|
|
case 'd': // download
|
|
start = read_uint32();
|
|
size = read_uint32();
|
|
for (p = (int8_t *) start; p < (int8_t *) (start+size); p++)
|
|
uart_putchar( *p );
|
|
break;
|
|
case 'g': // goto
|
|
start = read_uint32();
|
|
jump(start);
|
|
break;
|
|
default:
|
|
uart_putstr("**SAKC/bootloader** > \r\n");
|
|
break;
|
|
};
|
|
c = uart_getchar();
|
|
}
|
|
}
|
|
|