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USB @F042 receive/send in IRQ, circular buffers

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This commit is contained in:
Edward Emelianov 2022-10-27 11:58:56 +03:00
parent c0fd4fb10a
commit 1dc60d18b5
4 changed files with 25 additions and 11 deletions
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BIN
F0:F030,F042,F072/PL2303_ringbuffer/PL2303.bin
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7
F0:F030,F042,F072/PL2303_ringbuffer/proto.c
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@ -23,6 +23,7 @@
extern uint32_t Tms;
// 250 symbols == 1000 bit
const char *test = "123456789A123456789B123456789C123456789D123456789E123456789F123456789G123456789H123456789I123456789J123456789K123456789L123456789M123456789N123456789O123456789P123456789Q123456789R123456789S123456789T123456789U123456789V123456789W123456789X123456789Y";
char *omit_spaces(const char *buf){
@ -198,7 +199,11 @@ const char *parse_cmd(const char *buf){
u3 = Tms;
for(int i = 0; i < 1000; ++i) USB_sendstr(test);
add2buf("\n\nspd=");
add2buf(u2str(2000000000/(Tms - u3))); add2buf("\n"); // strlen == 2Mbit, speed in bits per second
// strlen == 2Mbit, speed in bits per second
add2buf(u2str(2000000000/(Tms - u3)));
add2buf("\ntransfer time is ");
add2buf(u2str(Tms - u3));
add2buf("\n");
break;
case 'U':
add2buf("USB status: ");

27
F0:F030,F042,F072/PL2303_ringbuffer/usb.c
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@ -16,7 +16,15 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
// USB read/write for text or binary data through ring-buffers (mean 5187476b/s)
// USB read/write for text or binary data through ring-buffers
/*
* mean speeds (bit/s) @ buffer size (bytes):
5333333 @ 128
5249343 @ 256
5181347 @ 512
5277044 @ 2048
5434782 @ 4096
*/
#include "ringbuffer.h"
#include "usb.h"
@ -28,27 +36,26 @@ static uint8_t obuf[RBOUTSZ], ibuf[RBINSZ];
static ringbuffer out = {.data = obuf, .length = RBOUTSZ, .head = 0, .tail = 0};
static ringbuffer in = {.data = ibuf, .length = RBINSZ, .head = 0, .tail = 0};
// transmission is succesfull
static volatile uint8_t tx_succesfull = 1;
static volatile uint8_t bufisempty = 1;
static volatile uint8_t bufovrfl = 0;
static void send_next(){
if(!tx_succesfull) return;
if(bufisempty) return;
static int lastdsz = 0;
int buflen = RB_read(&out, usbbuff, USB_TXBUFSZ);
if(!buflen){
if(lastdsz == 64) EP_Write(3, NULL, 0); // send ZLP after 64 bits packet when nothing more to send
lastdsz = 0;
bufisempty = 1;
return;
}
tx_succesfull = 0;
EP_Write(3, usbbuff, buflen);
lastdsz = buflen;
}
// send full content of ring buffer
int USB_sendall(){
while(RB_datalen(&out)){
send_next();
while(!bufisempty){
if(!usbON) return 0;
}
return 1;
@ -58,10 +65,13 @@ int USB_sendall(){
int USB_send(const uint8_t *buf, int len){
if(!buf || !usbON || !len) return 0;
while(len){
if(tx_succesfull) send_next();
int a = RB_write(&out, buf, len);
len -= a;
buf += a;
if(bufisempty){
bufisempty = 0;
send_next();
}
}
return 1;
}
@ -119,10 +129,10 @@ static void EP1_Handler(){
// data IN/OUT handlers
static void transmit_Handler(){ // EP3IN
tx_succesfull = 1;
uint16_t epstatus = KEEP_DTOG_STAT(USB->EPnR[3]);
// clear CTR keep DTOGs & STATs
USB->EPnR[3] = (epstatus & ~(USB_EPnR_CTR_TX)); // clear TX ctr
send_next();
}
static void receive_Handler(){ // EP2OUT
@ -153,6 +163,5 @@ void USB_proc(){
break;
default: // USB_STATE_CONNECTED - send next data portion
if(!usbON) return;
if(tx_succesfull) send_next();
}
}

2
F0:F030,F042,F072/PL2303_ringbuffer/version.inc
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@ -1,2 +1,2 @@
#define BUILD_NUMBER "111"
#define BUILD_NUMBER "120"
#define BUILD_DATE "2022-10-27"