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[FIRMWARE/ATARI ST] pl2303 buffer management

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This commit is contained in:
harbaum
2015-06-15 11:38:19 +00:00
parent 8968b58cdd
commit 305f240d4e
1 changed files with 16 additions and 4 deletions
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20
usb/pl2303.c
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@@ -118,10 +118,14 @@ static void pl2303_settings_dev(usb_device_t *dev, uint32_t rate, uint8_t bits,
if(memcmp(&lc, &dev->pl2303_info.line_coding, sizeof(line_coding_t)) != 0) {
memcpy(&dev->pl2303_info.line_coding, &lc, sizeof(line_coding_t));
pl2303_debugf("New line coding %ld %d/%d/%d", rate, bits, parity, stop);
if(rate & 0x80000000)
pl2303_debugf("Unsupported line coding");
else {
pl2303_debugf("New line coding %ld %d/%d/%d", rate, bits, parity, stop);
uint8_t rcode = pl2303_SetLineCoding(dev, &lc);
if(rcode) pl2303_debugf("%s() failed #%x", __FUNCTION__, rcode);
uint8_t rcode = pl2303_SetLineCoding(dev, &lc);
if(rcode) pl2303_debugf("%s() failed #%x", __FUNCTION__, rcode);
}
}
}
@@ -429,12 +433,20 @@ static uint8_t pl2303_poll(usb_device_t *dev) {
#define BUFFER_SIZE 8 // max 15
// check if fifo is empty (the empty fifo can hold up to 15 entries)
if(stat.fifo_stat & 4) {
// iprintf("space: %d\n", stat.fifo_stat>>4);
uint8_t buffer_space = stat.fifo_stat>>4; // BUFFER_SIZE
// send as many bytes as possible from buffer into core ...
uint8_t bytes2send = (rx_buf_fill < BUFFER_SIZE)?rx_buf_fill:BUFFER_SIZE;
uint8_t bytes2send = (rx_buf_fill < buffer_space)?rx_buf_fill:buffer_space;
pl2303_debugf("forward %d bytes into core", bytes2send);
user_io_serial_tx(rx_buf, bytes2send);
// ... and remove sent data from buffer
memmove(rx_buf, rx_buf+bytes2send, RX_BUF_SIZE-bytes2send);
rx_buf_fill -= bytes2send;
// if(user_io_serial_status(&stat, 0x90)) {
// iprintf("After %d: %d\n", bytes2send, stat.fifo_stat>>4);
// }
}
}