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Serial mouse: do not attempt to transmit a byte if none is queued, fixes #5475.

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OBattler
2025-04-17 01:10:04 +02:00
parent 18aea4e19f
commit 37ed6662dc
1 changed files with 7 additions and 2 deletions
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9
src/device/mouse_serial.c
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@@ -146,7 +146,11 @@ sermouse_transmit_byte(mouse_t *dev, int do_next)
serial_write_fifo(dev->serial, dev->buf[dev->buf_pos]); serial_write_fifo(dev->serial, dev->buf[dev->buf_pos]);
if (do_next) { if (do_next) {
dev->buf_pos = (dev->buf_pos + 1) % dev->buf_len; /* If we have a buffer length of 0, pretend the state is STATE_SKIP_PACKET. */
if (dev->buf_len == 0)
dev->buf_pos = 0;
else
dev->buf_pos = (dev->buf_pos + 1) % dev->buf_len;
if (dev->buf_pos != 0) if (dev->buf_pos != 0)
sermouse_set_period(dev, dev->transmit_period); sermouse_set_period(dev, dev->transmit_period);
@@ -374,6 +378,7 @@ sermouse_report(mouse_t *dev)
break; break;
default: default:
pclog("unknown dev->format = %02X\n", dev->format);
break; break;
} }
@@ -747,7 +752,7 @@ sermouse_timer(void *priv)
if (!dev->prompt && !dev->continuous) if (!dev->prompt && !dev->continuous)
sermouse_transmit_report(dev, (dev->state == STATE_TRANSMIT_REPORT)); sermouse_transmit_report(dev, (dev->state == STATE_TRANSMIT_REPORT));
else else
dev->state = STATE_IDLE; dev->state = STATE_IDLE;
break; break;
case STATE_TRANSMIT_REPORT: case STATE_TRANSMIT_REPORT:
case STATE_TRANSMIT: case STATE_TRANSMIT: