apple1-videocard-lib/demos/sdcard/cmd_write.h
2022-03-28 17:50:48 +02:00

68 lines
1.5 KiB
C

// gloabl start_address
// global end_address
// gloabl len
void comando_write() {
// send command byte
send_byte_to_MCU(CMD_WRITE);
if(TIMEOUT) return;
// send filename
send_string_to_MCU(filename);
if(TIMEOUT) return;
// get first response
byte response = receive_byte_from_MCU();
if(TIMEOUT) return;
if(response == ERR_RESPONSE) {
// error with file, print message
print_string_response();
return;
}
// send file size
//tmpword = (word) end_address - (word) start_address + 1; // KickC bug: (word) cast is needed
asm {
sec
lda end_address
sbc start_address
sta tmpword
lda end_address+1
sbc start_address+1
sta tmpword+1
}
tmpword++;
send_word_to_mcu();
if(TIMEOUT) return;
// send actual bytes
token_ptr = (byte *) start_address;
for(word t=0;t<tmpword;t++) {
send_byte_to_MCU(*token_ptr++);
if(TIMEOUT) return;
}
// get second response
response = receive_byte_from_MCU();
if(TIMEOUT) return;
if(response == ERR_RESPONSE) {
// error with file, print message
print_string_response();
return;
}
// print feedback to user
woz_putc('\r');
woz_puts(filename);
woz_puts(":\r$");
woz_print_hexword(start_address);
woz_puts("-$");
woz_print_hexword(end_address);
woz_puts(" (");
utoa(tmpword, filename, 10); // use filename as string buffer
woz_puts(filename);
woz_puts(" BYTES)\rOK");
}