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author | Perry Hung <iperry@alum.mit.edu> | 2010-06-04 00:43:21 -0400 |
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committer | Perry Hung <iperry@alum.mit.edu> | 2010-06-04 00:43:21 -0400 |
commit | 88d4b095e4590ab9bbafcf76e134d168f66c41b1 (patch) | |
tree | 5947dd76c0136194e0e08ea45cbe4e004d7b81ff /libmaple | |
parent | 1a908d88b8c288fca89b17ceea182044d82e766e (diff) | |
download | librambutan-88d4b095e4590ab9bbafcf76e134d168f66c41b1.tar.gz librambutan-88d4b095e4590ab9bbafcf76e134d168f66c41b1.zip |
Preliminary wirish USBSerial implementation.
-updated examples
-removed HardwareUSB
-cleaned up a handful of includes
Diffstat (limited to 'libmaple')
-rw-r--r-- | libmaple/usb/usb.c | 41 | ||||
-rw-r--r-- | libmaple/usb/usb_callbacks.c | 8 | ||||
-rw-r--r-- | libmaple/usb/usb_callbacks.h | 8 |
3 files changed, 31 insertions, 26 deletions
diff --git a/libmaple/usb/usb.c b/libmaple/usb/usb.c index f926e81..b7d2d93 100644 --- a/libmaple/usb/usb.c +++ b/libmaple/usb/usb.c @@ -26,7 +26,7 @@ * @file usb.c * * @brief usb-specific hardware setup, NVIC, clocks, and usb activities - * in the pre-attached state. includes some of the lower level callbacks + * in the pre-attached state. includes some of the lower level callbacks * needed by the usb library, like suspend,resume,init,etc */ @@ -46,13 +46,13 @@ volatile uint32 bDeviceState = UNCONNECTED; volatile uint16 wIstr = 0; volatile bIntPackSOF = 0; -DEVICE Device_Table = +DEVICE Device_Table = { NUM_ENDPTS, 1 }; -DEVICE_PROP Device_Property = +DEVICE_PROP Device_Property = { usbInit, usbReset, @@ -69,7 +69,7 @@ DEVICE_PROP Device_Property = bMaxPacketSize }; -USER_STANDARD_REQUESTS User_Standard_Requests = +USER_STANDARD_REQUESTS User_Standard_Requests = { NOP_Process, usbSetConfiguration, @@ -83,7 +83,7 @@ USER_STANDARD_REQUESTS User_Standard_Requests = }; void (*pEpInt_IN[7])(void) = -{ +{ vcomDataTxCb, vcomManagementCb, NOP_Process, @@ -218,7 +218,7 @@ RESULT usbPowerOff(void) { _SetISTR(0); _SetCNTR(CNTR_FRES + CNTR_PDWN); - /* note that all weve done here is powerdown the + /* note that all weve done here is powerdown the usb peripheral. we have no disabled the clocks, pulled the usb_disc pin back up, or reset the application state machines */ @@ -370,15 +370,18 @@ void usbWaitReset(void) { systemHardReset(); } -/* copies data out of sendBuf into the packet memory for - usb, but waits until any previous usb transmissions have +/* copies data out of sendBuf into the packet memory for + usb, but waits until any previous usb transmissions have completed before doing this. It returns without waiting for its data to be sent. most efficient when 64 bytes are copied - at a time. users responsible for not overflowing sendbuf + at a time. users responsible for not overflowing sendbuf with len! if > 64 bytes are being sent, then the function will block at every 64 byte packet */ int16 usbSendBytes(uint8* sendBuf, uint16 len) { + /* Block for any pending writes */ + while (countTx) + ; /* while (countTx != 0) { */ /* if (reset_state == NDTR_NRTS) { */ /* return 0; */ @@ -390,7 +393,7 @@ int16 usbSendBytes(uint8* sendBuf, uint16 len) { } /* ideally we should wait here, but it gets stuck - for some reason. countTx wont decrement when + for some reason. countTx wont decrement when theres no host side port reading the data, this is known, but even if we add the check for NDTR_NRTS it still gets stuck...*/ @@ -398,16 +401,18 @@ int16 usbSendBytes(uint8* sendBuf, uint16 len) { return 0; /* indicated to caller to keep trying, were just busy */ } - uint16 sent = len; + uint16 sent = len; while (len > VCOM_TX_EPSIZE) { countTx = VCOM_TX_EPSIZE; UserToPMABufferCopy(sendBuf,VCOM_TX_ADDR,VCOM_TX_EPSIZE); - _SetEPTxCount(VCOM_TX_ENDP,VCOM_TX_EPSIZE); + _SetEPTxCount(VCOM_TX_ENDP, VCOM_TX_EPSIZE); _SetEPTxValid(VCOM_TX_ENDP); - while(countTx != 0); + while (countTx) + ; + len -= VCOM_TX_EPSIZE; sendBuf += VCOM_TX_EPSIZE; } @@ -418,7 +423,7 @@ int16 usbSendBytes(uint8* sendBuf, uint16 len) { _SetEPTxCount(VCOM_TX_ENDP,len); _SetEPTxValid(VCOM_TX_ENDP); } - + return sent; } @@ -427,15 +432,15 @@ uint8 usbBytesAvailable(void) { return VCOM_RX_EPSIZE - maxNewBytes; } -/* copies len bytes from the local recieve FIFO (not - usb packet buffer) into recvBuf and deq's the fifo. - will only copy the minimum of len or the available +/* copies len bytes from the local recieve FIFO (not + usb packet buffer) into recvBuf and deq's the fifo. + will only copy the minimum of len or the available bytes. returns the number of bytes copied */ uint8 usbReceiveBytes(uint8* recvBuf, uint8 len) { if (len > VCOM_RX_EPSIZE - maxNewBytes) { len = VCOM_RX_EPSIZE - maxNewBytes; } - + int i; for (i=0;i<len;i++) { recvBuf[i] = (uint8)(vcomBufferRx[recvBufOut]); diff --git a/libmaple/usb/usb_callbacks.c b/libmaple/usb/usb_callbacks.c index 08d62c5..5c4a386 100644 --- a/libmaple/usb/usb_callbacks.c +++ b/libmaple/usb/usb_callbacks.c @@ -32,10 +32,10 @@ USB_Line_Coding line_coding = { }; uint8 vcomBufferRx[VCOM_RX_EPSIZE]; -uint8 countTx = 0; -uint8 recvBufIn = 0; -uint8 recvBufOut = 0; -uint8 maxNewBytes = VCOM_RX_EPSIZE; +volatile uint8 countTx = 0; +volatile uint8 recvBufIn = 0; +volatile uint8 recvBufOut = 0; +volatile uint8 maxNewBytes = VCOM_RX_EPSIZE; RESET_STATE reset_state = START; diff --git a/libmaple/usb/usb_callbacks.h b/libmaple/usb/usb_callbacks.h index f8a2ef3..ed57fa1 100644 --- a/libmaple/usb/usb_callbacks.h +++ b/libmaple/usb/usb_callbacks.h @@ -34,11 +34,11 @@ typedef enum { } RESET_STATE; extern RESET_STATE reset_state; /* tracks DTR/RTS */ -extern uint8 countTx; +extern volatile uint8 countTx; extern uint8 vcomBufferRx[VCOM_RX_EPSIZE]; /* no reason this has to be VCOM_RX_EPSIZE, could be bigger */ -extern uint8 recvBufIn; /* the FIFO in index to the recvbuffer */ -extern uint8 recvBufOut; /* the FIFO out index to the recvbuffer */ -extern uint8 maxNewBytes; +extern volatile uint8 recvBufIn; /* the FIFO in index to the recvbuffer */ +extern volatile uint8 recvBufOut; /* the FIFO out index to the recvbuffer */ +extern volatile uint8 maxNewBytes; void vcomDataTxCb(void); void vcomDataRxCb(void); |