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FTDI serial receive working, still no transmit

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This commit is contained in:
PaulStoffregen 2017-10-14 05:12:52 -07:00
parent 2b8ca63069
commit 3a43ebf73b
2 changed files with 39 additions and 12 deletions
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4
USBHost_t36.h
View File

@ -746,7 +746,7 @@ private:
class USBSerial: public USBDriver, public Stream {
public:
enum { BUFFER_SIZE = 4200 }; // must hold at least 6 max size packets, plus 2 extra bytes
enum { BUFFER_SIZE = 390 }; // must hold at least 6 max size packets, plus 2 extra bytes
USBSerial(USBHost &host) { init(); }
void begin(uint32_t baud, uint32_t format=0);
void end(void);
@ -764,6 +764,7 @@ private:
static void tx_callback(const Transfer_t *transfer);
void rx_data(const Transfer_t *transfer);
void tx_data(const Transfer_t *transfer);
void rx_queue_packets(uint32_t head, uint32_t tail);
void init();
static bool check_rxtx_ep(uint32_t &rxep, uint32_t &txep);
bool init_buffers(uint32_t rsize, uint32_t tsize);
@ -791,6 +792,7 @@ private:
volatile uint8_t rxstate;// bitmask: which receive packets are queued
volatile uint8_t txstate;
uint8_t pending_control;
bool control_queued;
enum { CDCACM, FTDI, PL2303, CH341 } sertype;
};

47
serial.cpp
View File

@ -83,6 +83,7 @@ bool USBSerial::claim(Device_t *dev, int type, const uint8_t *descriptors, uint3
pending_control = 0x0F;
mk_setup(setup, 0x40, 0, 0, 0, 0); // reset port
queue_Control_Transfer(dev, &setup, NULL, this);
control_queued = true;
return true;
}
}
@ -138,12 +139,14 @@ void USBSerial::disconnect()
void USBSerial::control(const Transfer_t *transfer)
{
println("control callback (serial)");
control_queued = false;
// set data format
if (pending_control & 1) {
pending_control &= ~1;
mk_setup(setup, 0x40, 4, 8, 0, 0); // data format 8N1
queue_Control_Transfer(device, &setup, NULL, this);
control_queued = true;
return;
}
// set baud rate
@ -152,6 +155,7 @@ void USBSerial::control(const Transfer_t *transfer)
uint32_t baudval = 3000000 / baudrate;
mk_setup(setup, 0x40, 3, baudval, 0, 0);
queue_Control_Transfer(device, &setup, NULL, this);
control_queued = true;
return;
}
// configure flow control
@ -159,6 +163,7 @@ void USBSerial::control(const Transfer_t *transfer)
pending_control &= ~4;
mk_setup(setup, 0x40, 2, 0, 0, 0);
queue_Control_Transfer(device, &setup, NULL, this);
control_queued = true;
return;
}
// set DTR
@ -166,9 +171,9 @@ void USBSerial::control(const Transfer_t *transfer)
pending_control &= ~8;
mk_setup(setup, 0x40, 1, 0x0101, 0, 0);
queue_Control_Transfer(device, &setup, NULL, this);
control_queued = true;
return;
}
}
void USBSerial::rx_callback(const Transfer_t *transfer)
@ -203,30 +208,41 @@ void USBSerial::rx_data(const Transfer_t *transfer)
len = 0;
}
}
if (len > 0) {
print("rx: ");
print_hexbytes(p, len);
}
//if (len > 0) {
//print("rx: ");
//print_hexbytes(p, len);
//}
// Copy data from packet buffer to circular buffer.
// Assume the buffer will always have space, since we
// check before queuing the buffers
uint32_t head = rxhead;
uint32_t tail = rxtail;
if (++head >= rxsize) head = 0;
uint32_t avail;
if (len > 0) {
//print("head=", head);
//print(", tail=", tail);
avail = rxsize - head;
//print(", avail=", avail);
//println(", rxsize=", rxsize);
if (avail > len) avail = len;
memcpy(rxbuf + head, p, avail);
if (len <= avail) {
head += avail;
head += avail - 1;
if (head >= rxsize) head = 0;
} else {
head = len - avail;
memcpy(rxbuf, p + avail, head);
head = len - avail - 1;
memcpy(rxbuf, p + avail, head + 1);
}
rxhead = head;
}
// re-queue packet buffer(s) if possible
rx_queue_packets(head, tail);
}
// re-queue packet buffer(s) if possible
void USBSerial::rx_queue_packets(uint32_t head, uint32_t tail)
{
uint32_t avail;
if (head >= tail) {
avail = rxsize - 1 - head + tail;
} else {
@ -266,6 +282,11 @@ void USBSerial::tx_data(const Transfer_t *transfer)
void USBSerial::begin(uint32_t baud, uint32_t format)
{
NVIC_DISABLE_IRQ(IRQ_USBHS);
baudrate = baud;
pending_control |= 2;
if (!control_queued) control(NULL);
NVIC_ENABLE_IRQ(IRQ_USBHS);
}
void USBSerial::end(void)
@ -278,7 +299,7 @@ int USBSerial::available(void)
uint32_t head = rxhead;
uint32_t tail = rxtail;
if (head >= tail) return head - tail;
return 0;
return rxsize + head - tail;
}
int USBSerial::peek(void)
@ -300,7 +321,11 @@ int USBSerial::read(void)
if (++tail >= rxsize) tail = 0;
int c = rxbuf[tail];
rxtail = tail;
// TODO: if rx packet not queued, and buffer now can fit a full packet, queue it
if ((rxstate & 0x03) != 0x03) {
NVIC_DISABLE_IRQ(IRQ_USBHS);
rx_queue_packets(head, tail);
NVIC_ENABLE_IRQ(IRQ_USBHS);
}
return c;
}