mirror of
https://github.com/eddyem/stm32samples.git
synced 2025-12-06 18:55:13 +03:00
93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/*
|
|
* geany_encoding=koi8-r
|
|
* usb.c - base functions for different USB types
|
|
*
|
|
* Copyright 2018 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
* MA 02110-1301, USA.
|
|
*
|
|
*/
|
|
#include "keycodes.h"
|
|
#include "usb.h"
|
|
#include "usb_lib.h"
|
|
#include "usart.h"
|
|
|
|
// incoming buffer size
|
|
#define IDATASZ (256)
|
|
static volatile uint8_t tx_succesfull = 0;
|
|
static int8_t usbON = 0; // ==1 when USB fully configured
|
|
|
|
// interrupt IN handler
|
|
static uint16_t EP1_Handler(ep_t ep){
|
|
if(ep.tx_flag){
|
|
tx_succesfull = 1;
|
|
ep.status = SET_VALID_RX(ep.status);
|
|
ep.status = SET_VALID_TX(ep.status);
|
|
}
|
|
return ep.status;
|
|
}
|
|
|
|
void USB_setup(){
|
|
NVIC_DisableIRQ(USB_LP_CAN1_RX0_IRQn);
|
|
NVIC_DisableIRQ(USB_HP_CAN1_TX_IRQn);
|
|
RCC->APB1ENR |= RCC_APB1ENR_USBEN;
|
|
USB->CNTR = USB_CNTR_FRES; // Force USB Reset
|
|
for(uint32_t ctr = 0; ctr < 72000; ++ctr) nop(); // wait >1ms
|
|
USB->CNTR = 0;
|
|
USB->BTABLE = 0;
|
|
USB->DADDR = 0;
|
|
USB->ISTR = 0;
|
|
USB->CNTR = USB_CNTR_RESETM | USB_CNTR_WKUPM; // allow only wakeup & reset interrupts
|
|
NVIC_EnableIRQ(USB_LP_CAN1_RX0_IRQn);
|
|
NVIC_EnableIRQ(USB_HP_CAN1_TX_IRQn );
|
|
}
|
|
|
|
void usb_proc(){
|
|
if(USB_GetState() == USB_CONFIGURE_STATE){ // USB configured - activate other endpoints
|
|
if(!usbON){ // endpoints not activated
|
|
EP_Init(1, EP_TYPE_INTERRUPT, USB_TXBUFSZ, 0, EP1_Handler); // IN1 - transmit
|
|
usbON = 1;
|
|
}
|
|
}else{
|
|
usbON = 0;
|
|
}
|
|
}
|
|
|
|
void USB_send(uint8_t *buf, uint16_t size){
|
|
if(!usbON) return;
|
|
uint16_t ctr = 0;
|
|
while(size){
|
|
uint16_t s = (size > USB_KEYBOARD_REPORT_SIZE) ? USB_KEYBOARD_REPORT_SIZE : size;
|
|
tx_succesfull = 0;
|
|
EP_Write(1, (uint8_t*)&buf[ctr], s);
|
|
uint32_t ctra = 1000000;
|
|
while(--ctra && tx_succesfull == 0);
|
|
if(!tx_succesfull){
|
|
DBG("Error sending data!");
|
|
}
|
|
size -= s;
|
|
ctr += s;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief USB_configured
|
|
* @return 1 if USB is in configured state
|
|
*/
|
|
int USB_configured(){
|
|
return usbON;
|
|
}
|