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msp430f5529: Implement dcd_int_enable/disable.

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This commit is contained in:
William D. Jones 2019-09-23 22:58:49 -04:00
parent a6a79df9fb
commit 950614a841
1 changed files with 31 additions and 0 deletions

31
src/portable/ti/msp430x5xx/dcd_msp430x5xx.c

@ -35,6 +35,11 @@
/*------------------------------------------------------------------*/ /*------------------------------------------------------------------*/
/* MACRO TYPEDEF CONSTANT ENUM /* 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; 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 dcd_int_enable (uint8_t rhport)
{ {
(void) 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 dcd_int_disable (uint8_t rhport)
{ {
(void) 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) void dcd_set_address (uint8_t rhport, uint8_t dev_addr)