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start adding U[S]ART support (need DMA)

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Edward Emelianov
2026-02-14 00:57:13 +03:00
parent 148c25b555
commit 26e74a6b89
9 changed files with 324 additions and 20 deletions
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23
F3:F303/InterfaceBoard/usb_dev.c
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@@ -19,6 +19,7 @@
#include "hardware.h"
#include "ringbuffer.h"
#include "usart.h"
#include "usb_descr.h"
#include "usb_dev.h"
@@ -59,20 +60,13 @@ static volatile ringbuffer rbin[InterfacesAmount] = {IBUF(0), IBUF(1), IBUF(2),
static volatile int lastdsz[InterfacesAmount] = {-1, -1, -1, -1, -1, -1, -1};
static void chkin(uint8_t ifno){
static int ovrflctr = 0; // "antistall" counter
if(bufovrfl[ifno]) return; // allow user to know that previous buffer was overflowed and cleared
if(!rcvbuflen[ifno]) return;
int w = RB_write((ringbuffer*)&rbin[ifno], (uint8_t*)rcvbuf[ifno], rcvbuflen[ifno]);
if(w < 0){ // buffer busy
if(w < 0){
return;
}else if(w == 0){ // no enough space or (WTF) incoming string larger than buffer size
if(rcvbuflen[ifno] > rbin[ifno].length || ++ovrflctr > 9999){
bufovrfl[ifno] = 1; // real overflow in case if ringbuffer's size less than USB buffer
ovrflctr = 0;
}else{
return; // not enough space
}
}
if(w != rcvbuflen[ifno]) bufovrfl[ifno] = 1;
rcvbuflen[ifno] = 0;
uint16_t status = KEEP_DTOG(USB->EPnR[1+ifno]); // don't change DTOG
USB->EPnR[1+ifno] = (status & ~(USB_EPnR_STAT_TX|USB_EPnR_CTR_RX)) ^ USB_EPnR_STAT_RX; // prepare to get next data portion
@@ -103,7 +97,7 @@ static void send_next(uint8_t ifno){
// data IN/OUT handler
static void rxtx_handler(){
uint8_t epno = (USB->ISTR & USB_ISTR_EPID), ifno = epno - 1;
if(epno > InterfacesAmount){
if(ifno > InterfacesAmount-1){
return;
}
uint16_t epstatus = KEEP_DTOG(USB->EPnR[epno]);
@@ -123,8 +117,8 @@ static void rxtx_handler(){
// SET_LINE_CODING
void linecoding_handler(uint8_t ifno, usb_LineCoding *lc){
usart_config(ifno, lc); // lc would be real speed!
lineCoding[ifno] = *lc;
// TODO: set up interfaces
}
// clear IN/OUT buffers on connection
@@ -137,7 +131,6 @@ static void clearbufs(uint8_t ifno){
while(Tms - T0 < 10){
if(1 == RB_clearbuf((ringbuffer*)&rbout[ifno])) break;
}
rcvbuflen[ifno] = 0;
}
// SET_CONTROL_LINE_STATE
@@ -208,7 +201,7 @@ int USB_sendall(uint8_t ifno){
uint32_t T0 = Tms;
while(lastdsz[ifno] > 0){
if(Tms - T0 > DISCONN_TMOUT){
break_handler(ifno);
//break_handler(ifno);
return FALSE;
}
if(!CDCready[ifno]) return FALSE;
@@ -223,7 +216,7 @@ int USB_send(uint8_t ifno, const uint8_t *buf, int len){
uint32_t T0 = Tms;
while(len){
if(Tms - T0 > DISCONN_TMOUT){
break_handler(ifno);
//break_handler(ifno);
return FALSE;
}
if(!CDCready[ifno]) return FALSE;
@@ -254,7 +247,7 @@ int USB_putbyte(uint8_t ifno, uint8_t byte){
uint32_t T0 = Tms;
while((l = RB_write((ringbuffer*)&rbout[ifno], &byte, 1)) != 1){
if(Tms - T0 > DISCONN_TMOUT){
break_handler(ifno);
//break_handler(ifno);
return FALSE;
}
if(!CDCready[ifno]) return FALSE;