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USB: unify and improve USB (dis)connect

This commit is contained in:
King Kévin 2020-01-03 19:39:41 +01:00
parent 08cba3cd71
commit 3c0130ba4f
2 changed files with 20 additions and 18 deletions
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18
lib/usb_cdcacm.c
View File

@ -247,7 +247,7 @@ static const char* usb_strings[] = {
"DFU bootloader (runtime mode)", /**< DFU interface string */
};
/** disconnect USB by pulling down D+ to for re-enumerate */
/** disconnect USB to force re-enumerate */
static void usb_disconnect(void)
{
if (usb_device) {
@ -258,18 +258,12 @@ static void usb_disconnect(void)
rcc_periph_clock_enable(RCC_GPIOB);
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO9);
gpio_set(GPIOB, GPIO9);
for (uint32_t i = 0; i < 0x2000; i++) { // wait for at least 10 ms
__asm__("nop");
}
#else
#endif
// pull USB D+ low for a short while
rcc_periph_clock_enable(RCC_GPIOA);
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
gpio_clear(GPIOA, GPIO12);
for (uint32_t i = 0; i < 0x2000; i++) { // wait for at least 10 ms
__asm__("nop");
}
#endif
sleep_ms(50); // USB disconnected must be at least 10 ms long, at most 100 ms
}
/** DFU detach (disconnect USB and perform core reset)
@ -447,6 +441,12 @@ void usb_cdcacm_setup(void)
// initialize USB
rcc_periph_reset_pulse(RST_USB); // reset USB peripheral
usb_disconnect(); // disconnect to force re-enumeration
#if defined(MAPLE_MINI)
// connect USB D+ using dedicated DISC line/circuit on PB9
rcc_periph_clock_enable(RCC_GPIOB);
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO9);
gpio_clear(GPIOB, GPIO9);
#endif
rcc_periph_clock_enable(RCC_GPIOA); // enable clock for GPIO used for USB
rcc_periph_clock_enable(RCC_USB); // enable clock for USB domain
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));

20
lib/usb_dfu.c
View File

@ -131,24 +131,20 @@ static const char *usb_dfu_strings[] = {
/** disconnect USB to force re-enumerate */
static void usb_disconnect(void)
{
if (usb_device) {
usbd_disconnect(usb_device, true);
}
#if defined(MAPLE_MINI)
// disconnect USB D+ using dedicated DISC line/circuit on PB9
rcc_periph_clock_enable(RCC_GPIOB);
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO9);
gpio_set(GPIOB, GPIO9);
for (uint32_t i = 0; i < 0x2000; i++) {
__asm__("nop");
}
gpio_clear(GPIOB, GPIO9);
#else
#endif
// pull USB D+ low for a short while
rcc_periph_clock_enable(RCC_GPIOA);
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
gpio_clear(GPIOA, GPIO12);
for (uint32_t i = 0; i < 0x2000; i++) {
__asm__("nop");
}
#endif
sleep_ms(50); // USB disconnected must be at least 10 ms long, at most 100 ms
}
/** flash downloaded data block
@ -311,6 +307,12 @@ void usb_dfu_setup(void)
rcc_periph_reset_pulse(RST_USB); // reset USB peripheral
usb_disconnect(); // disconnect to force re-enumeration
#if defined(MAPLE_MINI)
// connect USB D+ using dedicated DISC line/circuit on PB9
rcc_periph_clock_enable(RCC_GPIOB);
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO9);
gpio_clear(GPIOB, GPIO9);
#endif
rcc_periph_clock_enable(RCC_GPIOA); // enable clock for GPIO used for USB
rcc_periph_clock_enable(RCC_USB); // enable clock for USB domain
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