92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
#include <stdint.h>
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// Create external function at 0x00006f88
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extern void maybe_usb_setup_read(char endpoint,void *fun,uint32_t target_buffer);
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extern void dwc3_ep0_start_trans(char endpoint,uint32_t target_buf, uint32_t len);
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extern int usb_event_handler(void);
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extern void * get_endpoint_buffer(char endpoint);
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extern void sleep(int endpoint,uint32_t timeout);
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#define recv_buffer 0x02021800 + 0x2000
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#define data_received 0x02021800 + 0x2004
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void recv_data_cb(uint32_t endpoint, uint32_t len){
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void *rbuf;
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void *dest_buf = (void *)recv_buffer;
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volatile void *dref = (void *)data_received;
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rbuf = get_endpoint_buffer(endpoint);
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for(int i= 0; i < len; i++){
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*(char *)dest_buf = *(char *)(void *)((int)rbuf + i);
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}
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*(uint8_t *)dref = 1; // Mark as ready
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}
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void recv_data(){
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// Set data_received to 0
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// uint32_t *r = (uint32_t *) data_received;
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// r = 0;
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volatile void *dref = (void *)data_received;
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*(uint8_t *)dref = 0;
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maybe_usb_setup_read(2, recv_data_cb, 0x200);
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void *rbuf = get_endpoint_buffer(2);
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dwc3_ep0_start_trans(2, (uint32_t)rbuf, 0x200);
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while(1){
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usb_event_handler();
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if(*(uint8_t *)dref == 1){
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break;
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}
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}
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}
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void send_data(uint32_t *address, uint32_t size)
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{
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// asm("stp x29, x30, [sp,#-48]!");;
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// asm("mov w3, #0x0");
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// asm("bfxil w3, w1, #0, #24");
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// asm("mov w1, #0xc12");
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// asm("mov x29, sp");
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// asm("stp x19, x20, [sp,#16]");
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// asm("mov x5, #0xc834");
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// asm("mov w20, #0x1");
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// asm("movk x5, #0x1540, lsl #16");
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// asm("ldr x2, [x29,#40]");
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// asm("mov x4, #0xc838");
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// asm("orr w6, w1, w20");
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// asm("movk x4, #0x1540, lsl #16");
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// asm("mov x19, #0xc83c");
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// asm("movk x19, #0x1540, lsl #16");
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// asm("stp w3, w1, [x2,#8]");
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// asm("mov w3, #0x406");
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// asm("stp w0, wzr, [x2]");
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// asm("mov w0, w20");
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// asm("ldr x1, [x29,#40]");
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// asm("strb w6, [x2,#12]");
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// asm("mov x2, #0x27c8");
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// asm("str w1, [x5]");
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// asm("mov w1, #0x1388");
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// asm("str wzr, [x4]");
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// asm("str w3, [x19]");
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// asm("blr x2");
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// asm("mov w0, w20");
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// asm("ldr w1, [x19]");
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// asm("ldp x19, x20, [sp,#16]");
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// asm("ldp x29, x30, [sp],#48");
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// asm("ret");
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}
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int main() {
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while(1){
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recv_data();
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send_data((uint32_t *) recv_buffer, 0x200);
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}
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// recv_data();
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// sleep(1, 5000);
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asm("mov x0, #0x0");
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asm("br x0");
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}
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