Patch to add RTS on PB8 and DTR on PB9 to the Black Magic Probe UART

bmp_rts_dtr.patch

diff --git a/src/platforms/common/cdcacm.c b/src/platforms/common/cdcacm.c
index 399dd3d..d56d10e 100644
--- a/src/platforms/common/cdcacm.c
+++ b/src/platforms/common/cdcacm.c
@@ -451,12 +451,17 @@ static enum usbd_request_return_codes  cdcacm_control_request(usbd_device *dev,
 	case USB_CDC_REQ_SET_CONTROL_LINE_STATE:
 		cdcacm_set_modem_state(dev, req->wIndex, true, true);
 		/* Ignore if not for GDB interface */
-		if(req->wIndex != GDB_IF_NO)
+		switch(req->wIndex) {
+		case UART_IF_NO:
+			gpio_set_val(USBUSART_PORT, USBUSART_DTR_PIN, !(req->wValue & 1));
+			gpio_set_val(USBUSART_PORT, USBUSART_RTS_PIN, !((req->wValue >> 1) & 1));
 			return USBD_REQ_HANDLED;
-
-		cdcacm_gdb_dtr = req->wValue & 1;
-
-		return USBD_REQ_HANDLED;
+		case GDB_IF_NO:
+			cdcacm_gdb_dtr = req->wValue & 1;
+			return USBD_REQ_HANDLED;
+		default:
+			return USBD_REQ_HANDLED;
+		}
 	case USB_CDC_REQ_SET_LINE_CODING:
 		if(*len < sizeof(struct usb_cdc_line_coding))
 			return USBD_REQ_NOTSUPP;
diff --git a/src/platforms/swlink/platform.h b/src/platforms/swlink/platform.h
index 36cab71..611fd72 100644
--- a/src/platforms/swlink/platform.h
+++ b/src/platforms/swlink/platform.h
@@ -88,6 +88,8 @@ int usbuart_debug_write(const char *buf, size_t len);
 	gpio_set_mode(USBUSART_PORT, GPIO_MODE_INPUT, \
 				  GPIO_CNF_INPUT_PULL_UPDOWN, USBUSART_RX_PIN); \
 	gpio_set(USBUSART_PORT, USBUSART_RX_PIN); \
+	gpio_set_mode(USBUSART_PORT, GPIO_MODE_OUTPUT_50_MHZ, \
+				  GPIO_CNF_OUTPUT_PUSHPULL, USBUSART_RTS_PIN | USBUSART_DTR_PIN); \
 } while(0)
 
 #define USB_DRIVER      st_usbfs_v1_usb_driver
@@ -110,6 +112,8 @@ int usbuart_debug_write(const char *buf, size_t len);
 #define USBUSART_PORT GPIOB
 #define USBUSART_TX_PIN GPIO6
 #define USBUSART_RX_PIN GPIO7
+#define USBUSART_RTS_PIN GPIO8
+#define USBUSART_DTR_PIN GPIO9
 #define USBUSART_ISR(x) usart1_isr(x)
 #define USBUSART_DMA_BUS DMA1
 #define USBUSART_DMA_CLK RCC_DMA1