diff options
Diffstat (limited to 'libmaple')
| -rw-r--r-- | libmaple/usb/usb.c | 37 | ||||
| -rw-r--r-- | libmaple/usb/usb.h | 3 |
2 files changed, 18 insertions, 22 deletions
diff --git a/libmaple/usb/usb.c b/libmaple/usb/usb.c index 6a22cdf..ec189d6 100644 --- a/libmaple/usb/usb.c +++ b/libmaple/usb/usb.c @@ -49,7 +49,6 @@ static void dispatch_ctr_lp(void); * usb_lib/ globals */ -volatile uint16 wIstr = 0; /* most recently read value of wIstr */ uint16 SaveTState; /* caches TX status for later use */ uint16 SaveRState; /* caches RX status for later use */ @@ -57,8 +56,6 @@ uint16 SaveRState; /* caches RX status for later use */ * Other state */ -volatile uint32 bIntPackSOF = 0; - struct { volatile RESUME_STATE eState; volatile uint8 bESOFcnt; @@ -168,38 +165,38 @@ void usbResume(RESUME_STATE eResumeSetVal) { #define SUSPEND_ENABLED 1 void __irq_usb_lp_can_rx0(void) { - wIstr = USB_BASE->ISTR; + uint16 istr = USB_BASE->ISTR; /* Use USB_ISR_MSK to only include code for bits we care about. */ #if (USB_ISR_MSK & USB_ISTR_RESET) - if (wIstr & USB_ISTR_RESET & USBLIB->irq_mask) { + if (istr & USB_ISTR_RESET & USBLIB->irq_mask) { USB_BASE->ISTR = ~USB_ISTR_RESET; pProperty->Reset(); } #endif #if (USB_ISR_MSK & USB_ISTR_PMAOVR) - if (wIstr & ISTR_PMAOVR & USBLIB->irq_mask) { + if (istr & ISTR_PMAOVR & USBLIB->irq_mask) { USB_BASE->ISTR = ~USB_ISTR_PMAOVR; } #endif #if (USB_ISR_MSK & USB_ISTR_ERR) - if (wIstr & USB_ISTR_ERR & USBLIB->irq_mask) { + if (istr & USB_ISTR_ERR & USBLIB->irq_mask) { USB_BASE->ISTR = ~USB_ISTR_ERR; } #endif #if (USB_ISR_MSK & USB_ISTR_WKUP) - if (wIstr & USB_ISTR_WKUP & USBLIB->irq_mask) { + if (istr & USB_ISTR_WKUP & USBLIB->irq_mask) { USB_BASE->ISTR = ~USB_ISTR_WKUP; usbResume(RESUME_EXTERNAL); } #endif #if (USB_ISR_MSK & USB_ISTR_SUSP) - if (wIstr & USB_ISTR_SUSP & USBLIB->irq_mask) { + if (istr & USB_ISTR_SUSP & USBLIB->irq_mask) { /* check if SUSPEND is possible */ if (SUSPEND_ENABLED) { usbSuspend(); @@ -213,14 +210,13 @@ void __irq_usb_lp_can_rx0(void) { #endif #if (USB_ISR_MSK & USB_ISTR_SOF) - if (wIstr & USB_ISTR_SOF & USBLIB->irq_mask) { + if (istr & USB_ISTR_SOF & USBLIB->irq_mask) { USB_BASE->ISTR = ~USB_ISTR_SOF; - bIntPackSOF++; } #endif #if (USB_ISR_MSK & USB_ISTR_ESOF) - if (wIstr & USB_ISTR_ESOF & USBLIB->irq_mask) { + if (istr & USB_ISTR_ESOF & USBLIB->irq_mask) { USB_BASE->ISTR = ~USB_ISTR_ESOF; /* resume handling timing is made with ESOFs */ usbResume(RESUME_ESOF); /* request without change of the machine state */ @@ -232,7 +228,7 @@ void __irq_usb_lp_can_rx0(void) { */ #if (USB_ISR_MSK & USB_ISTR_CTR) - if (wIstr & USB_ISTR_CTR & USBLIB->irq_mask) { + if (istr & USB_ISTR_CTR & USBLIB->irq_mask) { dispatch_ctr_lp(); } #endif @@ -256,7 +252,7 @@ uint8 usbIsConnected() { * Auxiliary routines */ -static inline uint8 dispatch_endpt_zero(void); +static inline uint8 dispatch_endpt_zero(uint16 istr_dir); static inline void dispatch_endpt(uint8 ep); static inline void set_rx_tx_status0(uint16 rx, uint16 tx); @@ -264,19 +260,20 @@ static void handle_setup0(void); static void handle_in0(void); static void handle_out0(void); -static void dispatch_ctr_lp(void) { - while (((wIstr = USB_BASE->ISTR) & USB_ISTR_CTR) != 0) { +static void dispatch_ctr_lp() { + uint16 istr; + while (((istr = USB_BASE->ISTR) & USB_ISTR_CTR) != 0) { /* TODO WTF, figure this out: RM0008 says CTR is read-only, * but ST's firmware claims it's clear-only, and emphasizes * the importance of clearing it in more than one place. */ USB_BASE->ISTR = ~USB_ISTR_CTR; - uint8 ep_id = wIstr & USB_ISTR_EP_ID; + uint8 ep_id = istr & USB_ISTR_EP_ID; if (ep_id == 0) { /* TODO figure out why it's OK to break out of the loop * once we're done serving endpoint zero, but not okay if * there are multiple nonzero endpoint transfers to * handle. */ - if (dispatch_endpt_zero()) + if (dispatch_endpt_zero(istr & USB_ISTR_DIR)) return; } else { dispatch_endpt(ep_id); @@ -288,7 +285,7 @@ static void dispatch_ctr_lp(void) { * code, and is ugly/confusing in its use of SaveRState/SaveTState. * Fixing this requires filling in handle_in0(), handle_setup0(), * handle_out0(). */ -static inline uint8 dispatch_endpt_zero(void) { +static inline uint8 dispatch_endpt_zero(uint16 istr_dir) { uint32 epr = (uint16)USB_BASE->EP[0]; if (!(epr & (USB_EP_CTR_TX | USB_EP_SETUP | USB_EP_CTR_RX))) { @@ -304,7 +301,7 @@ static inline uint8 dispatch_endpt_zero(void) { /* Set actual RX/TX statuses to NAK while we're thinking */ set_rx_tx_status0(USB_EP_STAT_RX_NAK, USB_EP_STAT_TX_NAK); - if ((wIstr & USB_ISTR_DIR) == 0) { + if (istr_dir == 0) { /* ST RM0008: "If DIR bit=0, CTR_TX bit is set in the USB_EPnR * register related to the interrupting endpoint. The * interrupting transaction is of IN type (data transmitted by diff --git a/libmaple/usb/usb.h b/libmaple/usb/usb.h index b073156..107ea77 100644 --- a/libmaple/usb/usb.h +++ b/libmaple/usb/usb.h @@ -27,8 +27,7 @@ #ifndef _USB_H_ #define _USB_H_ -#include "libmaple.h" -#include "gpio.h" +#include "libmaple_types.h" #ifdef __cplusplus extern "C" { |