From: Keith Packard <keithp@keithp.com>
Date: Mon, 19 Dec 2022 20:41:50 +0000 (-0800)
Subject: altos/lpc: Allow USB pull-up to be inverted
X-Git-Url: https://git.gag.com/?a=commitdiff_plain;h=dc1702e54abe686f9285a4288a278e8743f3e905;p=fw%2Faltos

altos/lpc: Allow USB pull-up to be inverted

The lpcxpresso board has an external transistor for the USB
pull-up.

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/lpc/ao_usb_lpc.c b/src/lpc/ao_usb_lpc.c
index 04469916..8c4a8c3b 100644
--- a/src/lpc/ao_usb_lpc.c
+++ b/src/lpc/ao_usb_lpc.c
@@ -24,6 +24,15 @@
 #define USE_USB_STDIO	1
 #endif
 
+#ifdef HAS_USB_PULLUP_INVERT
+#define USB_CONNECT_VAL		0
+#define USB_DISCONNECT_VAL	1
+#else
+#define USB_CONNECT_VAL		1
+#define USB_DISCONNECT_VAL	0
+#endif
+
+
 #if USE_USB_STDIO
 #define AO_USB_OUT_SLEEP_ADDR	(&ao_stdin_ready)
 #else
@@ -855,7 +864,7 @@ ao_usb_disable(void)
 	ao_arch_block_interrupts();
 
 #if HAS_USB_PULLUP
-	ao_gpio_set(AO_USB_PULLUP_PORT, AO_USB_PULLUP_PIN, 0);
+	ao_gpio_set(AO_USB_PULLUP_PORT, AO_USB_PULLUP_PIN, USB_DISCONNECT_VAL);
 #endif
 	/* Disable interrupts */
 	lpc_usb.inten = 0;
@@ -973,7 +982,7 @@ ao_usb_enable(void)
 	ao_usb_set_ep0();
 
 #if HAS_USB_PULLUP
-	ao_gpio_set(AO_USB_PULLUP_PORT, AO_USB_PULLUP_PIN, 1);
+	ao_gpio_set(AO_USB_PULLUP_PORT, AO_USB_PULLUP_PIN, USB_CONNECT_VAL);
 #endif
 }
 
@@ -1012,7 +1021,7 @@ ao_usb_init(void)
 {
 #if HAS_USB_PULLUP
 	int	i;
-	ao_enable_output(AO_USB_PULLUP_PORT, AO_USB_PULLUP_PIN, 0);
+	ao_enable_output(AO_USB_PULLUP_PORT, AO_USB_PULLUP_PIN, USB_DISCONNECT_VAL);
 
 	for (i = 0; i < 40000; i++)
 		ao_arch_nop();