From c8b7f0b5b390ff4cae32566d53f4410e72de4573 Mon Sep 17 00:00:00 2001 From: Marti Bolivar Date: Tue, 31 Jul 2012 15:00:57 -0400 Subject: Move bootloader reset signal detection to Wirish. Use usb_cdcacm hooks to move the DTR edge and "1EAF" magic packet detection to usb_serial.cpp. We'll later be able to extend this system to support Leonardo-style reset signalling. Signed-off-by: Marti Bolivar --- libmaple/usb/stm32f1/usb_cdcacm.c | 150 ++++++-------------------------------- 1 file changed, 24 insertions(+), 126 deletions(-) (limited to 'libmaple/usb') diff --git a/libmaple/usb/stm32f1/usb_cdcacm.c b/libmaple/usb/stm32f1/usb_cdcacm.c index 44b2239..7a7d656 100644 --- a/libmaple/usb/stm32f1/usb_cdcacm.c +++ b/libmaple/usb/stm32f1/usb_cdcacm.c @@ -82,8 +82,6 @@ static uint8* usbGetStringDescriptor(uint16 length); static void usbSetConfiguration(void); static void usbSetDeviceAddress(void); -static void wait_reset(void); - /* * Descriptors */ @@ -263,13 +261,6 @@ ONE_DESCRIPTOR String_Descriptor[3] = { * Etc. */ -typedef enum { - DTR_UNSET, - DTR_HIGH, - DTR_NEGEDGE, - DTR_LOW -} RESET_STATE; - typedef struct { uint32 bitrate; uint8 format; @@ -284,7 +275,6 @@ USB_Line_Coding line_coding = { .paritytype = 0x00, .datatype = 0x08 }; -RESET_STATE reset_state = DTR_UNSET; static volatile uint8 vcomBufferRx[USB_CDCACM_RX_BUFLEN]; static volatile uint32 rx_offset = 0; @@ -492,64 +482,13 @@ static void vcomDataTxCb(void) { countTx = 0; } -#define EXC_RETURN 0xFFFFFFF9 -#define DEFAULT_CPSR 0x61000000 static void vcomDataRxCb(void) { - /* FIXME this is mad buggy */ - /* This following is safe since sizeof(vcomBufferRx) exceeds the * largest possible USB_CDCACM_RX_EPSIZE, and we set to NAK after * each data packet. Only when all bytes have been read is the RX * endpoint set back to VALID. */ newBytes = usb_get_ep_rx_count(USB_CDCACM_RX_ENDP); usb_set_ep_rx_stat(USB_CDCACM_RX_ENDP, USB_EP_STAT_RX_NAK); - - /* magic number, {0x31, 0x45, 0x41, 0x46} is "1EAF" */ - uint8 chkBuf[4]; - uint8 cmpBuf[4] = {0x31, 0x45, 0x41, 0x46}; - if (reset_state == DTR_NEGEDGE) { - reset_state = DTR_LOW; - - if (newBytes >= 4) { - unsigned int target = (unsigned int)wait_reset | 0x1; - - usb_copy_from_pma(chkBuf, 4, USB_CDCACM_RX_ADDR); - - int i; - USB_Bool cmpMatch = TRUE; - for (i = 0; i < 4; i++) { - if (chkBuf[i] != cmpBuf[i]) { - cmpMatch = FALSE; - } - } - - if (cmpMatch) { - asm volatile("mov r0, %[stack_top] \n\t" // Reset stack - "mov sp, r0 \n\t" - "mov r0, #1 \n\t" - "mov r1, %[target_addr] \n\t" - "mov r2, %[cpsr] \n\t" - "push {r2} \n\t" // Fake xPSR - "push {r1} \n\t" // PC target addr - "push {r0} \n\t" // Fake LR - "push {r0} \n\t" // Fake R12 - "push {r0} \n\t" // Fake R3 - "push {r0} \n\t" // Fake R2 - "push {r0} \n\t" // Fake R1 - "push {r0} \n\t" // Fake R0 - "mov lr, %[exc_return] \n\t" - "bx lr" - : - : [stack_top] "r" (STACK_TOP), - [target_addr] "r" (target), - [exc_return] "r" (EXC_RETURN), - [cpsr] "r" (DEFAULT_CPSR) - : "r0", "r1", "r2"); - /* should never get here */ - } - } - } - usb_copy_from_pma((uint8*)vcomBufferRx, newBytes, USB_CDCACM_RX_ADDR); if (rx_hook) { @@ -634,28 +573,27 @@ static void usbReset(void) { } static RESULT usbDataSetup(uint8 request) { - uint8 *(*CopyRoutine)(uint16); - CopyRoutine = NULL; + uint8* (*CopyRoutine)(uint16) = 0; if (Type_Recipient == (CLASS_REQUEST | INTERFACE_RECIPIENT)) { - /* Call the user hook first. */ - if (iface_setup_hook) { - uint8 req_copy = request; - iface_setup_hook(USB_CDCACM_HOOK_IFACE_SETUP, &req_copy); - } - switch (request) { - case (USB_CDCACM_GET_LINE_CODING): + case USB_CDCACM_GET_LINE_CODING: CopyRoutine = vcomGetSetLineCoding; last_request = USB_CDCACM_GET_LINE_CODING; break; - case (USB_CDCACM_SET_LINE_CODING): + case USB_CDCACM_SET_LINE_CODING: CopyRoutine = vcomGetSetLineCoding; last_request = USB_CDCACM_SET_LINE_CODING; break; default: break; } + + /* Call the user hook. */ + if (iface_setup_hook) { + uint8 req_copy = request; + iface_setup_hook(USB_CDCACM_HOOK_IFACE_SETUP, &req_copy); + } } if (CopyRoutine == NULL) { @@ -669,66 +607,32 @@ static RESULT usbDataSetup(uint8 request) { } static RESULT usbNoDataSetup(uint8 request) { + RESULT ret = USB_UNSUPPORT; uint8 new_signal; - /* we support set com feature but dont handle it */ if (Type_Recipient == (CLASS_REQUEST | INTERFACE_RECIPIENT)) { - /* Call the user hook first. */ - if (iface_setup_hook) { - uint8 req_copy = request; - iface_setup_hook(USB_CDCACM_HOOK_IFACE_SETUP, &req_copy); - } - switch (request) { - case (USB_CDCACM_SET_COMM_FEATURE): - return USB_SUCCESS; - case (USB_CDCACM_SET_CONTROL_LINE_STATE): - /* to reset the board, pull both dtr and rts low - then pulse dtr by itself */ + case USB_CDCACM_SET_COMM_FEATURE: + /* We support set comm. feature, but don't handle it. */ + ret = USB_SUCCESS; + break; + case USB_CDCACM_SET_CONTROL_LINE_STATE: + /* Track changes to DTR and RTS. */ new_signal = (pInformation->USBwValues.bw.bb0 & (USB_CDCACM_CONTROL_LINE_DTR | USB_CDCACM_CONTROL_LINE_RTS)); line_dtr_rts = new_signal & 0x03; + ret = USB_SUCCESS; + break; + } - switch (reset_state) { - /* no default, covered enum */ - case DTR_UNSET: - if ((new_signal & USB_CDCACM_CONTROL_LINE_DTR) == 0 ) { - reset_state = DTR_LOW; - } else { - reset_state = DTR_HIGH; - } - break; - - case DTR_HIGH: - if ((new_signal & USB_CDCACM_CONTROL_LINE_DTR) == 0 ) { - reset_state = DTR_NEGEDGE; - } else { - reset_state = DTR_HIGH; - } - break; - - case DTR_NEGEDGE: - if ((new_signal & USB_CDCACM_CONTROL_LINE_DTR) == 0 ) { - reset_state = DTR_LOW; - } else { - reset_state = DTR_HIGH; - } - break; - - case DTR_LOW: - if ((new_signal & USB_CDCACM_CONTROL_LINE_DTR) == 0 ) { - reset_state = DTR_LOW; - } else { - reset_state = DTR_HIGH; - } - break; - } - - return USB_SUCCESS; + /* Call the user hook. */ + if (iface_setup_hook) { + uint8 req_copy = request; + iface_setup_hook(USB_CDCACM_HOOK_IFACE_SETUP, &req_copy); } } - return USB_UNSUPPORT; + return ret; } static RESULT usbGetInterfaceSetting(uint8 interface, uint8 alt_setting) { @@ -767,9 +671,3 @@ static void usbSetConfiguration(void) { static void usbSetDeviceAddress(void) { USBLIB->state = USB_ADDRESSED; } - -#define RESET_DELAY 100000 -static void wait_reset(void) { - delay_us(RESET_DELAY); - nvic_sys_reset(); -} -- cgit v1.2.3