mirror of
git://projects.qi-hardware.com/nn-usb-fpga.git
synced 2025-01-11 01:00:15 +02:00
115 lines
2.2 KiB
C
115 lines
2.2 KiB
C
/**
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* Primitive first stage bootloader
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*
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*
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*/
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#include "soc-hw.h"
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/* prototypes */
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uint32_t read_uint32()
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{
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uint32_t val = 0, i;
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for (i = 0; i < 4; i++) {
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val <<= 8;
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val += (uint8_t)uart_getchar();
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}
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return val;
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}
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void hexprint(unsigned int hexval)
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{
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int digit[8], pos;
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uart_putstr("0x");
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for(pos = 0; pos < 8; pos++)
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{
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digit[pos] = (hexval & 0xF); /* last hexit */
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hexval = hexval >> 4;
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}
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for(pos = 7; pos > -1; pos--)
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{
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if(digit[pos] < 0xA)
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uart_putstr((char *)digit[pos] + '0');
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else
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uart_putstr((char *)digit[pos] + 'A' - 10);
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}
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uart_putchar(' ');
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}
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int main(int argc, char **argv)
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{
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int8_t *p;
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uint8_t c;
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int key, len, autoboot = 1, dispmenu = 1;
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// Initialize UART
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uart_init();
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while(1){ /* loop forever until u-boot gets booted or the board is reset */
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if(dispmenu){
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uart_putstr("\n1: Upload program to RAM\r\n");
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// uart_putstr("2: Upload u-boot to Dataflash\r\n");
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// uart_putstr("3: Upload Kernel to Dataflash\r\n");
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// uart_putstr("4: Start u-boot\r\n");
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// uart_putstr("5: Upload Filesystem image\r\n");
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// uart_putstr("6: Memory test\r\n");
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dispmenu = 0;
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}
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key = uart_getchar();
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autoboot = 0;
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if(key == '1'){
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len = rxmodem((unsigned char *)0x2000);
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uart_putstr("Received ");
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hexprint(len);
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uart_putstr(" bytes\r\n");
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// jump(0x1000);
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dispmenu = 1;
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}
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else{
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uart_putstr("Invalid input\r\n");
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dispmenu = 1;
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}
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}
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c = '*'; // print msg on first iteration
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for(;;) {
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uint32_t start, size;
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switch (c) {
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case 'u': // upload
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start = read_uint32();
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size = read_uint32();
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for (p = (int8_t *) start; p < (int8_t *) (start+size); p++)
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*p = uart_getchar();
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break;
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case 'd': // download
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start = read_uint32();
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size = read_uint32();
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for (p = (int8_t *) start; p < (int8_t *) (start+size); p++)
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uart_putchar( *p );
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break;
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case 'g': // goto
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start = read_uint32();
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jump(start);
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break;
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default:
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uart_putstr("**SAKC/bootloader** > \r\n");
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break;
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};
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c = uart_getchar();
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}
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}
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