From 950614a841a69f09ffd8b97205183e1c85b09443 Mon Sep 17 00:00:00 2001
From: "William D. Jones" <thor0505@comcast.net>
Date: Mon, 23 Sep 2019 22:58:49 -0400
Subject: [PATCH] msp430f5529: Implement dcd_int_enable/disable.
---
src/portable/ti/msp430x5xx/dcd_msp430x5xx.c | 31 +++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/src/portable/ti/msp430x5xx/dcd_msp430x5xx.c b/src/portable/ti/msp430x5xx/dcd_msp430x5xx.c
index e9ca76853..e01c0243f 100644
--- a/src/portable/ti/msp430x5xx/dcd_msp430x5xx.c
+++ b/src/portable/ti/msp430x5xx/dcd_msp430x5xx.c
@@ -35,6 +35,11 @@
/*------------------------------------------------------------------*/
/* MACRO TYPEDEF CONSTANT ENUM
*------------------------------------------------------------------*/
+// usbpllir_mirror and usbmaintl_mirror can be added later if needed.
+static volatile uint16_t usbiepie_mirror = 0;
+static volatile uint16_t usboepie_mirror = 0;
+static volatile uint16_t usbie_mirror = 0;
+static volatile uint16_t usbpwrctl_mirror = 0;
/*------------------------------------------------------------------*/
@@ -50,14 +55,40 @@ void dcd_init (uint8_t rhport)
USBKEYPID = 0;
}
+// There is no "USB peripheral interrupt disable" bit on MSP430, so we have
+// to save the relevant registers individually.
+// WARNING: Unlike the ARM/NVIC routines, these functions are _not_ idempotent
+// if you modified the registers saved in between calls so they don't match
+// the mirrors; mirrors will be updated to reflect most recent register
+// contents.
void dcd_int_enable (uint8_t rhport)
{
(void) rhport;
+
+ __bic_SR_register(GIE); // Unlikely to be called in ISR, but let's be safe.
+ // Also, this cleanly disables all USB interrupts
+ // atomically from application's POV.
+ USBOEPIE = usboepie_mirror;
+ USBIEPIE = usbiepie_mirror;
+ USBIE = usbie_mirror;
+ USBPWRCTL |= usbpwrctl_mirror;
+ __bis_SR_register(GIE);
}
void dcd_int_disable (uint8_t rhport)
{
(void) rhport;
+
+ __bic_SR_register(GIE);
+ usboepie_mirror = USBOEPIE;
+ usbiepie_mirror = USBIEPIE;
+ usbie_mirror = USBIE;
+ usbpwrctl_mirror = (USBPWRCTL & (VUOVLIE | VBONIE | VBOFFIE));
+ USBOEPIE = 0;
+ USBIEPIE = 0;
+ USBIE = 0;
+ USBPWRCTL &= ~(VUOVLIE | VBONIE | VBOFFIE);
+ __bis_SR_register(GIE);
}
void dcd_set_address (uint8_t rhport, uint8_t dev_addr)