88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
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#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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extern void usb_send(uint32_t address,uint32_t size);
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extern void rom_send();
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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_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 send_data(void *address, uint32_t size){
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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(0x1, send_data_cb, 0x200);
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void *rbuf = get_endpoint_buffer(1);
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dwc3_ep0_start_trans(1, (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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int main() {
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while(1){
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recv_data();
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// rom_send();
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send_data(0x0, 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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