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GB Printer: Fix some edge cases (fixes #895)

This commit is contained in:
Vicki Pfau 2017-10-10 22:30:02 -07:00
parent 0225803b72
commit 8d9d644dfe
1 changed files with 38 additions and 35 deletions
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25
src/gb/sio/printer.c
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@ -69,8 +69,8 @@ static void _processByte(struct GBPrinter* printer) {
static uint8_t GBPrinterWriteSC(struct GBSIODriver* driver, uint8_t value) {
struct GBPrinter* printer = (struct GBPrinter*) driver;
if ((value & 0x81) == 0x81) {
switch (printer->next) {
driver->p->pendingSB = 0;
switch (printer->next) {
case GB_PRINTER_BYTE_MAGIC_0:
if (printer->byte == 0x88) {
printer->next = GB_PRINTER_BYTE_MAGIC_1;
@ -183,6 +183,15 @@ static uint8_t GBPrinterWriteSC(struct GBSIODriver* driver, uint8_t value) {
}
break;
case GB_PRINTER_COMMAND_STATUS:
default:
break;
}
driver->p->pendingSB = printer->status;
printer->next = GB_PRINTER_BYTE_MAGIC_0;
break;
}
if (!printer->printWait) {
printer->status &= ~GB_PRINTER_STATUS_READY;
printer->status |= GB_PRINTER_STATUS_PRINTING | GB_PRINTER_STATUS_PRINT_REQ;
@ -212,22 +221,16 @@ static uint8_t GBPrinterWriteSC(struct GBSIODriver* driver, uint8_t value) {
}
printer->print(printer, printer->currentIndex * 4 / GB_VIDEO_HORIZONTAL_PIXELS, printer->buffer);
}
}
if (printer->printWait >= 0) {
printer->printWait = -1;
} else if (printer->printWait > 0) {
--printer->printWait;
}
default:
break;
}
driver->p->pendingSB = printer->status;
printer->next = GB_PRINTER_BYTE_MAGIC_0;
break;
}
printer->byte = 0;
}
return value;
}
void GBPrinterDonePrinting(struct GBPrinter* printer) {
printer->status &= ~GB_PRINTER_STATUS_PRINTING;
printer->status &= ~(GB_PRINTER_STATUS_PRINTING | GB_PRINTER_STATUS_PRINT_REQ);
}