USB: unify and improve USB (dis)connect
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08cba3cd71
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@ -247,7 +247,7 @@ static const char* usb_strings[] = {
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"DFU bootloader (runtime mode)", /**< DFU interface string */
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};
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/** disconnect USB by pulling down D+ to for re-enumerate */
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/** disconnect USB to force re-enumerate */
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static void usb_disconnect(void)
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{
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if (usb_device) {
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@ -258,18 +258,12 @@ static void usb_disconnect(void)
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rcc_periph_clock_enable(RCC_GPIOB);
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gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO9);
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gpio_set(GPIOB, GPIO9);
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for (uint32_t i = 0; i < 0x2000; i++) { // wait for at least 10 ms
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__asm__("nop");
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}
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#else
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#endif
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// pull USB D+ low for a short while
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rcc_periph_clock_enable(RCC_GPIOA);
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gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
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gpio_clear(GPIOA, GPIO12);
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for (uint32_t i = 0; i < 0x2000; i++) { // wait for at least 10 ms
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__asm__("nop");
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}
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#endif
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sleep_ms(50); // USB disconnected must be at least 10 ms long, at most 100 ms
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}
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/** DFU detach (disconnect USB and perform core reset)
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@ -447,6 +441,12 @@ void usb_cdcacm_setup(void)
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// initialize USB
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rcc_periph_reset_pulse(RST_USB); // reset USB peripheral
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usb_disconnect(); // disconnect to force re-enumeration
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#if defined(MAPLE_MINI)
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// connect USB D+ using dedicated DISC line/circuit on PB9
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rcc_periph_clock_enable(RCC_GPIOB);
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gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO9);
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gpio_clear(GPIOB, GPIO9);
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#endif
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rcc_periph_clock_enable(RCC_GPIOA); // enable clock for GPIO used for USB
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rcc_periph_clock_enable(RCC_USB); // enable clock for USB domain
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usb_device = usbd_init(&st_usbfs_v1_usb_driver, &usb_cdcacm_device_descriptor, &usb_cdcacm_configuration_descriptor, usb_strings, LENGTH(usb_strings), usbd_control_buffer, sizeof(usbd_control_buffer));
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@ -131,24 +131,20 @@ static const char *usb_dfu_strings[] = {
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/** disconnect USB to force re-enumerate */
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static void usb_disconnect(void)
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{
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if (usb_device) {
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usbd_disconnect(usb_device, true);
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}
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#if defined(MAPLE_MINI)
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// disconnect USB D+ using dedicated DISC line/circuit on PB9
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rcc_periph_clock_enable(RCC_GPIOB);
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gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO9);
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gpio_set(GPIOB, GPIO9);
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for (uint32_t i = 0; i < 0x2000; i++) {
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__asm__("nop");
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}
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gpio_clear(GPIOB, GPIO9);
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#else
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#endif
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// pull USB D+ low for a short while
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rcc_periph_clock_enable(RCC_GPIOA);
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gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
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gpio_clear(GPIOA, GPIO12);
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for (uint32_t i = 0; i < 0x2000; i++) {
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__asm__("nop");
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}
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#endif
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sleep_ms(50); // USB disconnected must be at least 10 ms long, at most 100 ms
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}
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/** flash downloaded data block
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@ -311,6 +307,12 @@ void usb_dfu_setup(void)
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rcc_periph_reset_pulse(RST_USB); // reset USB peripheral
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usb_disconnect(); // disconnect to force re-enumeration
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#if defined(MAPLE_MINI)
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// connect USB D+ using dedicated DISC line/circuit on PB9
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rcc_periph_clock_enable(RCC_GPIOB);
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gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO9);
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gpio_clear(GPIOB, GPIO9);
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#endif
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rcc_periph_clock_enable(RCC_GPIOA); // enable clock for GPIO used for USB
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rcc_periph_clock_enable(RCC_USB); // enable clock for USB domain
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usb_device = usbd_init(&st_usbfs_v1_usb_driver, &usb_dfu_device, &usb_dfu_configuration, usb_dfu_strings, LENGTH(usb_dfu_strings), usbd_control_buffer, sizeof(usbd_control_buffer)); // configure USB device
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