Merge pull request #60 from themadinventor/lp-icdi-clean

Added (preliminary) support for TI TM4C123 Launchpad
This commit is contained in:
Gareth McMullin 2014-12-23 21:31:43 +13:00
commit fdd7799304
11 changed files with 1501 additions and 1 deletions

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@ -38,7 +38,7 @@ static int lmi_flash_erase(struct target_s *target, uint32_t addr, int len);
static int lmi_flash_write(struct target_s *target, uint32_t dest, static int lmi_flash_write(struct target_s *target, uint32_t dest,
const uint8_t *src, int len); const uint8_t *src, int len);
static const char lmi_driver_str[] = "LuminaryMicro Stellaris"; static const char lmi_driver_str[] = "TI Stellaris/Tiva";
static const char lmi_xml_memory_map[] = "<?xml version=\"1.0\"?>" static const char lmi_xml_memory_map[] = "<?xml version=\"1.0\"?>"
/* "<!DOCTYPE memory-map " /* "<!DOCTYPE memory-map "
@ -51,6 +51,17 @@ static const char lmi_xml_memory_map[] = "<?xml version=\"1.0\"?>"
" <memory type=\"ram\" start=\"0x20000000\" length=\"0x10000\"/>" " <memory type=\"ram\" start=\"0x20000000\" length=\"0x10000\"/>"
"</memory-map>"; "</memory-map>";
static const char tm4c123gh6pm_xml_memory_map[] = "<?xml version=\"1.0\"?>"
/* "<!DOCTYPE memory-map "
" PUBLIC \"+//IDN gnu.org//DTD GDB Memory Map V1.0//EN\""
" \"http://sourceware.org/gdb/gdb-memory-map.dtd\">"*/
"<memory-map>"
" <memory type=\"flash\" start=\"0\" length=\"0x40000\">"
" <property name=\"blocksize\">0x400</property>"
" </memory>"
" <memory type=\"ram\" start=\"0x20000000\" length=\"0x8000\"/>"
"</memory-map>";
uint16_t lmi_flash_write_stub[] = { uint16_t lmi_flash_write_stub[] = {
// _start: // _start:
@ -100,6 +111,13 @@ bool lmi_probe(struct target_s *target)
target->flash_erase = lmi_flash_erase; target->flash_erase = lmi_flash_erase;
target->flash_write = lmi_flash_write; target->flash_write = lmi_flash_write;
return true; return true;
case 0x10A1: /* TM4C123GH6PM */
target->driver = lmi_driver_str;
target->xml_mem_map = tm4c123gh6pm_xml_memory_map;
target->flash_erase = lmi_flash_erase;
target->flash_write = lmi_flash_write;
return true;
} }
return false; return false;
} }

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@ -0,0 +1,23 @@
CROSS_COMPILE ?= arm-none-eabi-
CC = $(CROSS_COMPILE)gcc
OBJCOPY = $(CROSS_COMPILE)objcopy
INCLUDES = -I../libopencm3/include
CPU_FLAGS = -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=hard
CFLAGS += $(INCLUDES) $(CPU_FLAGS) -DTARGET_IS_BLIZZARD_RB1 -DLM4F -DPART_TM4C123GH6PM
LINKER_SCRIPT="platforms/tm4c/tm4c.ld"
LDFLAGS = -nostartfiles -lc $(CPU_FLAGS) -nodefaultlibs -T$(LINKER_SCRIPT) -Wl,--gc-sections \
-L../libopencm3/lib -lopencm3_lm4f -lnosys -lm -lgcc
VPATH += platforms/tm4c
SRC += cdcacm.c \
usbuart.c \
traceswo.o
all: blackmagic.bin
blackmagic.bin: blackmagic
$(OBJCOPY) -O binary $^ $@

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@ -0,0 +1,86 @@
#include "platform.h"
#include "gdb_if.h"
#include "usbuart.h"
#include <libopencm3/lm4f/rcc.h>
#include <libopencm3/lm4f/nvic.h>
#include <libopencm3/lm4f/uart.h>
#include <libopencm3/cm3/systick.h>
#define SYSTICKHZ 100
#define SYSTICKMS (1000 / SYSTICKHZ)
#define PLL_DIV_80MHZ 5
#define PLL_DIV_25MHZ 16
extern void trace_tick(void);
jmp_buf fatal_error_jmpbuf;
uint8_t running_status;
volatile uint32_t timeout_counter;
const char *morse_msg;
void morse(const char *msg, char repeat)
{
(void) msg;
(void) repeat;
}
void sys_tick_handler(void)
{
if(timeout_counter)
timeout_counter--;
trace_tick();
}
int
platform_init(void)
{
int i;
for(i=0; i<1000000; i++);
rcc_sysclk_config(OSCSRC_MOSC, XTAL_16M, PLL_DIV_80MHZ);
// Enable all JTAG ports and set pins to output
periph_clock_enable(RCC_GPIOA);
periph_clock_enable(RCC_GPIOB);
gpio_enable_ahb_aperture();
gpio_mode_setup(TMS_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, TMS_PIN);
gpio_mode_setup(TCK_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, TCK_PIN);
gpio_mode_setup(TDI_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, TDI_PIN);
gpio_mode_setup(TDO_PORT, GPIO_MODE_INPUT, GPIO_PUPD_NONE, TDO_PIN);
gpio_mode_setup(SRST_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, SRST_PIN);
gpio_set_output_config(SRST_PORT, GPIO_OTYPE_OD, GPIO_DRIVE_2MA, SRST_PIN);
gpio_set(SRST_PORT, SRST_PIN);
systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8);
systick_set_reload(rcc_get_system_clock_frequency() / (SYSTICKHZ * 8));
systick_interrupt_enable();
systick_counter_enable();
nvic_enable_irq(NVIC_SYSTICK_IRQ);
nvic_enable_irq(NVIC_UART0_IRQ);
usbuart_init();
cdcacm_init();
//jtag_scan(NULL);
return 0;
}
void platform_delay(uint32_t delay)
{
timeout_counter = delay * 10;
while(timeout_counter);
}
const char *platform_target_voltage(void)
{
return "not supported";
}

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@ -0,0 +1,137 @@
#ifndef __PLATFORM_H
#define __PLATFORM_H
#include <stdint.h>
#include <setjmp.h>
#include <alloca.h>
#include <libopencm3/lm4f/gpio.h>
#include <libopencm3/usb/usbd.h>
#include "gdb_packet.h"
#define CDCACM_PACKET_SIZE 64
#define BOARD_IDENT "Black Magic Probe (Launchpad ICDI), (Firmware 1.5" VERSION_SUFFIX ", build " BUILDDATE ")"
#define BOARD_IDENT_DFU "Black Magic (Upgrade) for Launchpad, (Firmware 1.5" VERSION_SUFFIX ", build " BUILDDATE ")"
#define DFU_IDENT "Black Magic Firmware Upgrade (Launchpad)"
#define DFU_IFACE_STRING "lolwut"
extern usbd_device *usbdev;
#define CDCACM_GDB_ENDPOINT 1
#define CDCACM_UART_ENDPOINT 3
extern jmp_buf fatal_error_jmpbuf;
extern uint8_t running_status;
extern const char *morse_msg;
extern volatile uint32_t timeout_counter;
#define TMS_PORT GPIOA_BASE
#define TMS_PIN GPIO3
#define TCK_PORT GPIOA_BASE
#define TCK_PIN GPIO2
#define TDI_PORT GPIOA_BASE
#define TDI_PIN GPIO5
#define TDO_PORT GPIOA_BASE
#define TDO_PIN GPIO4
#define SWO_PORT GPIOD_BASE
#define SWO_PIN GPIO6
#define SWDIO_PORT TMS_PORT
#define SWDIO_PIN TMS_PIN
#define SWCLK_PORT TCK_PORT
#define SWCLK_PIN TCK_PIN
#define SRST_PORT GPIOA_BASE
#define SRST_PIN GPIO6
#define TMS_SET_MODE() { \
gpio_mode_setup(TMS_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, TMS_PIN); \
gpio_set_output_config(TMS_PORT, GPIO_OTYPE_PP, GPIO_DRIVE_2MA, TMS_PIN); \
}
#define SWDIO_MODE_FLOAT() { \
gpio_mode_setup(SWDIO_PORT, GPIO_MODE_INPUT, GPIO_PUPD_NONE, SWDIO_PIN); \
}
#define SWDIO_MODE_DRIVE() { \
gpio_mode_setup(SWDIO_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, SWDIO_PIN); \
gpio_set_output_config(SWDIO_PORT, GPIO_OTYPE_PP, GPIO_DRIVE_2MA, SWDIO_PIN); \
}
extern usbd_driver lm4f_usb_driver;
#define USB_DRIVER lm4f_usb_driver
#define USB_IRQ NVIC_USB0_IRQ
#define USB_ISR usb0_isr
#define IRQ_PRI_USB (2 << 4)
#define USBUART UART0
#define USBUART_CLK RCC_UART0
#define USBUART_IRQ NVIC_UART0_IRQ
#define USBUART_ISR uart0_isr
#define UART_PIN_SETUP() do { \
periph_clock_enable(RCC_GPIOA); \
__asm__("nop"); __asm__("nop"); __asm__("nop"); \
gpio_set_af(GPIOA_BASE, 0x1, GPIO0 | GPIO1); \
gpio_mode_setup(GPIOA_BASE, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO0); \
gpio_mode_setup(GPIOA_BASE, GPIO_MODE_INPUT, GPIO_PUPD_NONE, GPIO1); \
} while (0)
#define TRACEUART UART2
#define TRACEUART_CLK RCC_UART2
#define TRACEUART_IRQ NVIC_UART2_IRQ
#define TRACEUART_ISR uart2_isr
/* Use newlib provided integer only stdio functions */
#define sscanf siscanf
#define sprintf siprintf
#define vasprintf vasiprintf
#define DEBUG(...)
#define SET_RUN_STATE(state) {running_status = (state);}
#define SET_IDLE_STATE(state) {}
#define SET_ERROR_STATE(state) SET_IDLE_STATE(state)
#define PLATFORM_SET_FATAL_ERROR_RECOVERY() {setjmp(fatal_error_jmpbuf);}
#define PLATFORM_FATAL_ERROR(error) { \
if( running_status ) gdb_putpacketz("X1D"); \
else gdb_putpacketz("EFF"); \
running_status = 0; \
target_list_free(); \
morse("TARGET LOST.", 1); \
longjmp(fatal_error_jmpbuf, (error)); \
}
#define PLATFORM_HAS_TRACESWO
int platform_init(void);
void morse(const char *msg, char repeat);
inline static void gpio_set_val(uint32_t port, uint8_t pin, uint8_t val) {
gpio_write(port, pin, val == 0 ? 0 : 0xff);
}
inline static uint8_t gpio_get(uint32_t port, uint8_t pin) {
return !(gpio_read(port, pin) == 0);
}
void platform_delay(uint32_t delay);
const char *platform_target_voltage(void);
/* <cdcacm.c> */
void cdcacm_init(void);
/* Returns current usb configuration, or 0 if not configured. */
int cdcacm_get_config(void);
int cdcacm_get_dtr(void);
#define disconnect_usb() do { usbd_disconnect(usbdev,1); nvic_disable_irq(USB_IRQ);} while(0)
#define setup_vbus_irq()
#endif

577
src/platforms/tm4c/cdcacm.c Normal file
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@ -0,0 +1,577 @@
/*
* This file is part of the Black Magic Debug project.
*
* Copyright (C) 2011 Black Sphere Technologies Ltd.
* Written by Gareth McMullin <gareth@blacksphere.co.nz>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* This file implements a the USB Communications Device Class - Abstract
* Control Model (CDC-ACM) as defined in CDC PSTN subclass 1.2.
* A Device Firmware Upgrade (DFU 1.1) class interface is provided for
* field firmware upgrade.
*
* The device's unique id is used as the USB serial number string.
*/
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/usb/usbd.h>
#include <libopencm3/usb/cdc.h>
#include <libopencm3/cm3/scb.h>
#include <libopencm3/usb/dfu.h>
#include <libopencm3/lm4f/rcc.h>
#include <libopencm3/lm4f/usb.h>
#include <stdlib.h>
#include "platform.h"
#include "gdb_if.h"
#if defined(PLATFORM_HAS_TRACESWO)
#include <traceswo.h>
#endif
#include <usbuart.h>
#define DFU_IF_NO 4
usbd_device * usbdev;
static char *get_dev_unique_id(char *serial_no);
static int configured;
static int cdcacm_gdb_dtr = 1;
static const struct usb_device_descriptor dev = {
.bLength = USB_DT_DEVICE_SIZE,
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = 0x0200,
.bDeviceClass = 0xEF, /* Miscellaneous Device */
.bDeviceSubClass = 2, /* Common Class */
.bDeviceProtocol = 1, /* Interface Association */
.bMaxPacketSize0 = 64,
.idVendor = 0x1D50,
.idProduct = 0x6018,
.bcdDevice = 0x0100,
.iManufacturer = 1,
.iProduct = 2,
.iSerialNumber = 3,
.bNumConfigurations = 1,
};
/* This notification endpoint isn't implemented. According to CDC spec its
* optional, but its absence causes a NULL pointer dereference in Linux cdc_acm
* driver. */
static const struct usb_endpoint_descriptor gdb_comm_endp[] = {{
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0x82,
.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
.wMaxPacketSize = 16,
.bInterval = 255,
}};
static const struct usb_endpoint_descriptor gdb_data_endp[] = {{
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0x01,
.bmAttributes = USB_ENDPOINT_ATTR_BULK,
.wMaxPacketSize = CDCACM_PACKET_SIZE,
.bInterval = 1,
}, {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0x81,
.bmAttributes = USB_ENDPOINT_ATTR_BULK,
.wMaxPacketSize = CDCACM_PACKET_SIZE,
.bInterval = 1,
}};
static const struct {
struct usb_cdc_header_descriptor header;
struct usb_cdc_call_management_descriptor call_mgmt;
struct usb_cdc_acm_descriptor acm;
struct usb_cdc_union_descriptor cdc_union;
} __attribute__((packed)) gdb_cdcacm_functional_descriptors = {
.header = {
.bFunctionLength = sizeof(struct usb_cdc_header_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_HEADER,
.bcdCDC = 0x0110,
},
.call_mgmt = {
.bFunctionLength =
sizeof(struct usb_cdc_call_management_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_CALL_MANAGEMENT,
.bmCapabilities = 0,
.bDataInterface = 1,
},
.acm = {
.bFunctionLength = sizeof(struct usb_cdc_acm_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_ACM,
.bmCapabilities = 2, /* SET_LINE_CODING supported */
},
.cdc_union = {
.bFunctionLength = sizeof(struct usb_cdc_union_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_UNION,
.bControlInterface = 0,
.bSubordinateInterface0 = 1,
}
};
static const struct usb_interface_descriptor gdb_comm_iface[] = {{
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 0,
.bAlternateSetting = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_CDC,
.bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
.bInterfaceProtocol = USB_CDC_PROTOCOL_AT,
.iInterface = 4,
.endpoint = gdb_comm_endp,
.extra = &gdb_cdcacm_functional_descriptors,
.extralen = sizeof(gdb_cdcacm_functional_descriptors)
}};
static const struct usb_interface_descriptor gdb_data_iface[] = {{
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 1,
.bAlternateSetting = 0,
.bNumEndpoints = 2,
.bInterfaceClass = USB_CLASS_DATA,
.bInterfaceSubClass = 0,
.bInterfaceProtocol = 0,
.iInterface = 0,
.endpoint = gdb_data_endp,
}};
static const struct usb_iface_assoc_descriptor gdb_assoc = {
.bLength = USB_DT_INTERFACE_ASSOCIATION_SIZE,
.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
.bFirstInterface = 0,
.bInterfaceCount = 2,
.bFunctionClass = USB_CLASS_CDC,
.bFunctionSubClass = USB_CDC_SUBCLASS_ACM,
.bFunctionProtocol = USB_CDC_PROTOCOL_AT,
.iFunction = 0,
};
/* Serial ACM interface */
static const struct usb_endpoint_descriptor uart_comm_endp[] = {{
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0x84,
.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
.wMaxPacketSize = 16,
.bInterval = 255,
}};
static const struct usb_endpoint_descriptor uart_data_endp[] = {{
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0x03,
.bmAttributes = USB_ENDPOINT_ATTR_BULK,
.wMaxPacketSize = CDCACM_PACKET_SIZE,
.bInterval = 1,
}, {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0x83,
.bmAttributes = USB_ENDPOINT_ATTR_BULK,
.wMaxPacketSize = CDCACM_PACKET_SIZE,
.bInterval = 1,
}};
static const struct {
struct usb_cdc_header_descriptor header;
struct usb_cdc_call_management_descriptor call_mgmt;
struct usb_cdc_acm_descriptor acm;
struct usb_cdc_union_descriptor cdc_union;
} __attribute__((packed)) uart_cdcacm_functional_descriptors = {
.header = {
.bFunctionLength = sizeof(struct usb_cdc_header_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_HEADER,
.bcdCDC = 0x0110,
},
.call_mgmt = {
.bFunctionLength =
sizeof(struct usb_cdc_call_management_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_CALL_MANAGEMENT,
.bmCapabilities = 0,
.bDataInterface = 3,
},
.acm = {
.bFunctionLength = sizeof(struct usb_cdc_acm_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_ACM,
.bmCapabilities = 2, /* SET_LINE_CODING supported*/
},
.cdc_union = {
.bFunctionLength = sizeof(struct usb_cdc_union_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_UNION,
.bControlInterface = 2,
.bSubordinateInterface0 = 3,
}
};
static const struct usb_interface_descriptor uart_comm_iface[] = {{
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 2,
.bAlternateSetting = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_CDC,
.bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
.bInterfaceProtocol = USB_CDC_PROTOCOL_AT,
.iInterface = 5,
.endpoint = uart_comm_endp,
.extra = &uart_cdcacm_functional_descriptors,
.extralen = sizeof(uart_cdcacm_functional_descriptors)
}};
static const struct usb_interface_descriptor uart_data_iface[] = {{
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 3,
.bAlternateSetting = 0,
.bNumEndpoints = 2,
.bInterfaceClass = USB_CLASS_DATA,
.bInterfaceSubClass = 0,
.bInterfaceProtocol = 0,
.iInterface = 0,
.endpoint = uart_data_endp,
}};
static const struct usb_iface_assoc_descriptor uart_assoc = {
.bLength = USB_DT_INTERFACE_ASSOCIATION_SIZE,
.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
.bFirstInterface = 2,
.bInterfaceCount = 2,
.bFunctionClass = USB_CLASS_CDC,
.bFunctionSubClass = USB_CDC_SUBCLASS_ACM,
.bFunctionProtocol = USB_CDC_PROTOCOL_AT,
.iFunction = 0,
};
const struct usb_dfu_descriptor dfu_function = {
.bLength = sizeof(struct usb_dfu_descriptor),
.bDescriptorType = DFU_FUNCTIONAL,
.bmAttributes = USB_DFU_CAN_DOWNLOAD | USB_DFU_WILL_DETACH,
.wDetachTimeout = 255,
.wTransferSize = 1024,
.bcdDFUVersion = 0x011A,
};
const struct usb_interface_descriptor dfu_iface = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = DFU_IF_NO,
.bAlternateSetting = 0,
.bNumEndpoints = 0,
.bInterfaceClass = 0xFE,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 1,
.iInterface = 6,
.extra = &dfu_function,
.extralen = sizeof(dfu_function),
};
static const struct usb_iface_assoc_descriptor dfu_assoc = {
.bLength = USB_DT_INTERFACE_ASSOCIATION_SIZE,
.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
.bFirstInterface = 4,
.bInterfaceCount = 1,
.bFunctionClass = 0xFE,
.bFunctionSubClass = 1,
.bFunctionProtocol = 1,
.iFunction = 6,
};
#if defined(PLATFORM_HAS_TRACESWO)
static const struct usb_endpoint_descriptor trace_endp[] = {{
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0x85,
.bmAttributes = USB_ENDPOINT_ATTR_BULK,
.wMaxPacketSize = 64,
.bInterval = 0,
}};
const struct usb_interface_descriptor trace_iface = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 5,
.bAlternateSetting = 0,
.bNumEndpoints = 1,
.bInterfaceClass = 0xFF,
.bInterfaceSubClass = 0xFF,
.bInterfaceProtocol = 0xFF,
.iInterface = 7,
.endpoint = trace_endp,
};
static const struct usb_iface_assoc_descriptor trace_assoc = {
.bLength = USB_DT_INTERFACE_ASSOCIATION_SIZE,
.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
.bFirstInterface = 5,
.bInterfaceCount = 1,
.bFunctionClass = 0xFF,
.bFunctionSubClass = 0xFF,
.bFunctionProtocol = 0xFF,
.iFunction = 7,
};
#endif
static const struct usb_interface ifaces[] = {{
.num_altsetting = 1,
.iface_assoc = &gdb_assoc,
.altsetting = gdb_comm_iface,
}, {
.num_altsetting = 1,
.altsetting = gdb_data_iface,
}, {
.num_altsetting = 1,
.iface_assoc = &uart_assoc,
.altsetting = uart_comm_iface,
}, {
.num_altsetting = 1,
.altsetting = uart_data_iface,
}, {
.num_altsetting = 1,
.iface_assoc = &dfu_assoc,
.altsetting = &dfu_iface,
#if defined(PLATFORM_HAS_TRACESWO)
}, {
.num_altsetting = 1,
.iface_assoc = &trace_assoc,
.altsetting = &trace_iface,
#endif
}};
static const struct usb_config_descriptor config = {
.bLength = USB_DT_CONFIGURATION_SIZE,
.bDescriptorType = USB_DT_CONFIGURATION,
.wTotalLength = 0,
#if defined(PLATFORM_HAS_TRACESWO)
.bNumInterfaces = 6,
#else
.bNumInterfaces = 5,
#endif
.bConfigurationValue = 1,
.iConfiguration = 0,
.bmAttributes = 0x80,
.bMaxPower = 0x32,
.interface = ifaces,
};
char serial_no[9];
static const char *usb_strings[] = {
"Black Sphere Technologies",
BOARD_IDENT,
serial_no,
"Black Magic GDB Server",
"Black Magic UART Port",
DFU_IDENT,
#if defined(PLATFORM_HAS_TRACESWO)
"Black Magic Trace Capture",
#endif
};
static void dfu_detach_complete(usbd_device *dev, struct usb_setup_data *req)
{
(void)dev;
(void)req;
/* Disconnect USB cable */
disconnect_usb();
/* Assert boot-request pin */
//assert_boot_pin();
/* Reset core to enter bootloader */
scb_reset_core();
}
static int cdcacm_control_request(usbd_device *dev,
struct usb_setup_data *req, uint8_t **buf, uint16_t *len,
void (**complete)(usbd_device *dev, struct usb_setup_data *req))
{
(void)dev;
(void)complete;
(void)buf;
(void)len;
switch(req->bRequest) {
case USB_CDC_REQ_SET_CONTROL_LINE_STATE:
/* Ignore if not for GDB interface */
if(req->wIndex != 0)
return 1;
cdcacm_gdb_dtr = req->wValue & 1;
return 1;
case USB_CDC_REQ_SET_LINE_CODING:
if(*len < sizeof(struct usb_cdc_line_coding))
return 0;
switch(req->wIndex) {
case 2:
usbuart_set_line_coding((struct usb_cdc_line_coding*)*buf);
case 0:
return 1; /* Ignore on GDB Port */
default:
return 0;
}
case DFU_GETSTATUS:
if(req->wIndex == DFU_IF_NO) {
(*buf)[0] = DFU_STATUS_OK;
(*buf)[1] = 0;
(*buf)[2] = 0;
(*buf)[3] = 0;
(*buf)[4] = STATE_APP_IDLE;
(*buf)[5] = 0; /* iString not used here */
*len = 6;
return 1;
}
case DFU_DETACH:
if(req->wIndex == DFU_IF_NO) {
*complete = dfu_detach_complete;
return 1;
}
return 0;
}
return 0;
}
int cdcacm_get_config(void)
{
return configured;
}
int cdcacm_get_dtr(void)
{
return cdcacm_gdb_dtr;
}
static void cdcacm_set_config(usbd_device *dev, uint16_t wValue)
{
configured = wValue;
/* GDB interface */
usbd_ep_setup(dev, 0x01, USB_ENDPOINT_ATTR_BULK,
CDCACM_PACKET_SIZE, gdb_usb_out_cb);
usbd_ep_setup(dev, 0x81, USB_ENDPOINT_ATTR_BULK,
CDCACM_PACKET_SIZE, NULL);
usbd_ep_setup(dev, 0x82, USB_ENDPOINT_ATTR_INTERRUPT, 16, NULL);
/* Serial interface */
usbd_ep_setup(dev, 0x03, USB_ENDPOINT_ATTR_BULK,
CDCACM_PACKET_SIZE, usbuart_usb_out_cb);
usbd_ep_setup(dev, 0x83, USB_ENDPOINT_ATTR_BULK,
CDCACM_PACKET_SIZE, usbuart_usb_in_cb);
usbd_ep_setup(dev, 0x84, USB_ENDPOINT_ATTR_INTERRUPT, 16, NULL);
#if defined(PLATFORM_HAS_TRACESWO)
/* Trace interface */
usbd_ep_setup(dev, 0x85, USB_ENDPOINT_ATTR_BULK,
64, trace_buf_drain);
#endif
usbd_register_control_callback(dev,
USB_REQ_TYPE_CLASS | USB_REQ_TYPE_INTERFACE,
USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
cdcacm_control_request);
/* Notify the host that DCD is asserted.
* Allows the use of /dev/tty* devices on *BSD/MacOS
*/
char buf[10];
struct usb_cdc_notification *notif = (void*)buf;
/* We echo signals back to host as notification */
notif->bmRequestType = 0xA1;
notif->bNotification = USB_CDC_NOTIFY_SERIAL_STATE;
notif->wValue = 0;
notif->wIndex = 0;
notif->wLength = 2;
buf[8] = 3; /* DCD | DSR */
buf[9] = 0;
usbd_ep_write_packet(dev, 0x82, buf, 10);
notif->wIndex = 2;
usbd_ep_write_packet(dev, 0x84, buf, 10);
}
/* We need a special large control buffer for this device: */
uint8_t usbd_control_buffer[256];
void cdcacm_init(void)
{
get_dev_unique_id(serial_no);
periph_clock_enable(RCC_GPIOD);
__asm__("nop"); __asm__("nop"); __asm__("nop");
gpio_mode_setup(GPIOD_BASE, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO4|GPIO5);
usbdev = usbd_init(&USB_DRIVER, &dev, &config, usb_strings,
sizeof(usb_strings)/sizeof(char *),
usbd_control_buffer, sizeof(usbd_control_buffer));
usbd_register_set_config_callback(usbdev, cdcacm_set_config);
usb_enable_interrupts(USB_INT_RESET|USB_INT_DISCON|USB_INT_RESUME|USB_INT_SUSPEND,
0xff, 0xff);
nvic_set_priority(USB_IRQ, IRQ_PRI_USB);
nvic_enable_irq(USB_IRQ);
setup_vbus_irq();
}
void USB_ISR(void)
{
usbd_poll(usbdev);
}
static char *get_dev_unique_id(char *s)
{
/* FIXME: Store a unique serial number somewhere and retreive here */
uint32_t unique_id = 1;
int i;
/* Fetch serial number from chip's unique ID */
for(i = 0; i < 8; i++) {
s[7-i] = ((unique_id >> (4*i)) & 0xF) + '0';
}
for(i = 0; i < 8; i++)
if(s[i] > '9')
s[i] += 'A' - '9' - 1;
s[8] = 0;
return s;
}

100
src/platforms/tm4c/gdb_if.c Normal file
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/*
* This file is part of the Black Magic Debug project.
*
* Copyright (C) 2011 Black Sphere Technologies Ltd.
* Written by Gareth McMullin <gareth@blacksphere.co.nz>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* This file implements a transparent channel over which the GDB Remote
* Serial Debugging protocol is implemented. This implementation for STM32
* uses the USB CDC-ACM device bulk endpoints to implement the channel.
*/
#include "platform.h"
#include <libopencm3/usb/usbd.h>
#include "gdb_if.h"
static volatile uint32_t head_out, tail_out;
static volatile uint32_t count_in;
static volatile uint8_t buffer_out[16*CDCACM_PACKET_SIZE];
static volatile uint8_t buffer_in[CDCACM_PACKET_SIZE];
void gdb_if_putchar(unsigned char c, int flush)
{
buffer_in[count_in++] = c;
if(flush || (count_in == CDCACM_PACKET_SIZE)) {
/* Refuse to send if USB isn't configured, and
* don't bother if nobody's listening */
if((cdcacm_get_config() != 1) || !cdcacm_get_dtr()) {
count_in = 0;
return;
}
while(usbd_ep_write_packet(usbdev, CDCACM_GDB_ENDPOINT,
(uint8_t *)buffer_in, count_in) <= 0);
count_in = 0;
}
}
void gdb_usb_out_cb(usbd_device *dev, uint8_t ep)
{
(void)ep;
static uint8_t buf[CDCACM_PACKET_SIZE];
usbd_ep_nak_set(dev, CDCACM_GDB_ENDPOINT, 1);
uint32_t count = usbd_ep_read_packet(dev, CDCACM_GDB_ENDPOINT,
(uint8_t *)buf, CDCACM_PACKET_SIZE);
uint32_t idx;
for (idx=0; idx<count; idx++) {
buffer_out[head_out++ % sizeof(buffer_out)] = buf[idx];
}
usbd_ep_nak_set(dev, CDCACM_GDB_ENDPOINT, 0);
}
unsigned char gdb_if_getchar(void)
{
while(tail_out == head_out) {
/* Detach if port closed */
if(!cdcacm_get_dtr())
return 0x04;
while(cdcacm_get_config() != 1);
}
return buffer_out[tail_out++ % sizeof(buffer_out)];
}
unsigned char gdb_if_getchar_to(int timeout)
{
timeout_counter = timeout/100;
if(head_out == tail_out) do {
/* Detach if port closed */
if(!cdcacm_get_dtr())
return 0x04;
while(cdcacm_get_config() != 1);
} while(timeout_counter && head_out == tail_out);
if(head_out != tail_out)
return gdb_if_getchar();
return -1;
}

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#include "jtagtap.h"
int
jtagtap_init(void)
{
TMS_SET_MODE();
for(int i = 0; i <= 50; i++) jtagtap_next(1,0);
jtagtap_tms_seq(0xE73C, 16);
jtagtap_soft_reset();
return 0;
}
void
jtagtap_reset(void)
{
#ifdef TRST_PORT
volatile int i;
gpio_clear(TRST_PORT, TRST_PIN);
for(i = 0; i < 10000; i++) asm("nop");
gpio_set(TRST_PORT, TRST_PIN);
#endif
jtagtap_soft_reset();
}
void
jtagtap_srst(bool assert)
{
volatile int i;
if (assert) {
gpio_clear(SRST_PORT, SRST_PIN);
for(i = 0; i < 10000; i++) asm("nop");
} else {
gpio_set(SRST_PORT, SRST_PIN);
}
}
uint8_t
jtagtap_next(const uint8_t dTMS, const uint8_t dTDO)
{
uint16_t ret;
gpio_set_val(TMS_PORT, TMS_PIN, dTMS);
gpio_set_val(TDI_PORT, TDI_PIN, dTDO);
gpio_set(TCK_PORT, TCK_PIN);
ret = gpio_get(TDO_PORT, TDO_PIN);
gpio_clear(TCK_PORT, TCK_PIN);
DEBUG("jtagtap_next(TMS = %d, TDO = %d) = %d\n", dTMS, dTDO, ret);
return ret != 0;
}
#define PROVIDE_GENERIC_JTAGTAP_TMS_SEQ
#define PROVIDE_GENERIC_JTAGTAP_TDI_TDO_SEQ
#define PROVIDE_GENERIC_JTAGTAP_TDI_SEQ
#include "jtagtap_generic.c"

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#include "general.h"
#include "platform.h"
#include "swdptap.h"
static void swdptap_turnaround(uint8_t dir)
{
static uint8_t olddir = 0;
DEBUG("%s", dir ? "\n-> ":"\n<- ");
/* Don't turnaround if direction not changing */
if(dir == olddir) return;
olddir = dir;
if(dir)
SWDIO_MODE_FLOAT();
gpio_set(SWCLK_PORT, SWCLK_PIN);
gpio_clear(SWCLK_PORT, SWCLK_PIN);
if(!dir)
SWDIO_MODE_DRIVE();
}
static uint8_t swdptap_bit_in(void)
{
uint16_t ret;
ret = gpio_get(SWDIO_PORT, SWDIO_PIN);
gpio_set(SWCLK_PORT, SWCLK_PIN);
gpio_clear(SWCLK_PORT, SWCLK_PIN);
DEBUG("%d", ret?1:0);
return ret != 0;
}
static void swdptap_bit_out(uint8_t val)
{
DEBUG("%d", val);
gpio_set_val(SWDIO_PORT, SWDIO_PIN, val);
gpio_set(SWCLK_PORT, SWCLK_PIN);
gpio_clear(SWCLK_PORT, SWCLK_PIN);
}
int
swdptap_init(void)
{
swdptap_reset();
swdptap_seq_out(0xE79E, 16); /* 0b0111100111100111 */
swdptap_reset();
swdptap_seq_out(0, 16);
return 0;
}
void
swdptap_reset(void)
{
swdptap_turnaround(0);
/* 50 clocks with TMS high */
for(int i = 0; i < 50; i++) swdptap_bit_out(1);
}
uint32_t
swdptap_seq_in(int ticks)
{
uint32_t index = 1;
uint32_t ret = 0;
swdptap_turnaround(1);
while(ticks--) {
if(swdptap_bit_in()) ret |= index;
index <<= 1;
}
return ret;
}
uint8_t
swdptap_seq_in_parity(uint32_t *ret, int ticks)
{
uint32_t index = 1;
uint8_t parity = 0;
*ret = 0;
swdptap_turnaround(1);
while(ticks--) {
if(swdptap_bit_in()) {
*ret |= index;
parity ^= 1;
}
index <<= 1;
}
if(swdptap_bit_in()) parity ^= 1;
return parity;
}
void
swdptap_seq_out(uint32_t MS, int ticks)
{
swdptap_turnaround(0);
while(ticks--) {
swdptap_bit_out(MS & 1);
MS >>= 1;
}
}
void
swdptap_seq_out_parity(uint32_t MS, int ticks)
{
uint8_t parity = 0;
swdptap_turnaround(0);
while(ticks--) {
swdptap_bit_out(MS & 1);
parity ^= MS;
MS >>= 1;
}
swdptap_bit_out(parity & 1);
}

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/*
* This file is part of the libopenstm32 project.
*
* Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x00000000, LENGTH = 256K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 32K
}
/* Include the common ld script from libopenstm32. */
INCLUDE libopencm3_lm4f.ld

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/*
* This file is part of the Black Magic Debug project.
*
* Copyright (C) 2012 Black Sphere Technologies Ltd.
* Written by Gareth McMullin <gareth@blacksphere.co.nz>
*
* Copyright (C) 2014 Fredrik Ahlberg <fredrik@z80.se>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* This file implements capture of the TRACESWO output.
*
* ARM DDI 0403D - ARMv7M Architecture Reference Manual
* ARM DDI 0337I - Cortex-M3 Technical Reference Manual
* ARM DDI 0314H - CoreSight Components Technical Reference Manual
*/
#include "general.h"
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/lm4f/rcc.h>
#include <libopencm3/lm4f/nvic.h>
#include <libopencm3/lm4f/uart.h>
#include <libopencm3/usb/usbd.h>
#include <string.h>
#include "platform.h"
void traceswo_init(void)
{
periph_clock_enable(RCC_GPIOD);
periph_clock_enable(TRACEUART_CLK);
__asm__("nop"); __asm__("nop"); __asm__("nop");
gpio_mode_setup(SWO_PORT, GPIO_MODE_INPUT, GPIO_PUPD_NONE, SWO_PIN);
gpio_set_af(SWO_PORT, 1, SWO_PIN); /* U2RX */
uart_disable(TRACEUART);
/* Setup UART parameters. */
uart_clock_from_sysclk(TRACEUART);
uart_set_baudrate(TRACEUART, 800000);
uart_set_databits(TRACEUART, 8);
uart_set_stopbits(TRACEUART, 1);
uart_set_parity(TRACEUART, UART_PARITY_NONE);
// Enable FIFO
uart_enable_fifo(TRACEUART);
// Set FIFO interrupt trigger levels to 4/8 full for RX buffer and
// 7/8 empty (1/8 full) for TX buffer
uart_set_fifo_trigger_levels(TRACEUART, UART_FIFO_RX_TRIG_1_2, UART_FIFO_TX_TRIG_7_8);
uart_clear_interrupt_flag(TRACEUART, UART_INT_RX | UART_INT_RT);
/* Enable interrupts */
uart_enable_interrupts(TRACEUART, UART_INT_RX | UART_INT_RT);
/* Finally enable the USART. */
uart_enable(TRACEUART);
nvic_set_priority(TRACEUART_IRQ, 0);
nvic_enable_irq(TRACEUART_IRQ);
/* Un-stall USB endpoint */
usbd_ep_stall_set(usbdev, 0x85, 0);
gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO3);
}
void traceswo_baud(unsigned int baud)
{
uart_set_baudrate(TRACEUART, baud);
uart_set_databits(TRACEUART, 8);
}
#define FIFO_SIZE 256
/* RX Fifo buffer */
static volatile uint8_t buf_rx[FIFO_SIZE];
/* Fifo in pointer, writes assumed to be atomic, should be only incremented within RX ISR */
static volatile uint32_t buf_rx_in = 0;
/* Fifo out pointer, writes assumed to be atomic, should be only incremented outside RX ISR */
static volatile uint32_t buf_rx_out = 0;
void trace_buf_push(void)
{
size_t len;
if (buf_rx_in == buf_rx_out) {
return;
} else if (buf_rx_in > buf_rx_out) {
len = buf_rx_in - buf_rx_out;
} else {
len = FIFO_SIZE - buf_rx_out;
}
if (len > 64) {
len = 64;
}
if (usbd_ep_write_packet(usbdev, 0x85, (uint8_t *)&buf_rx[buf_rx_out], len) == len) {
buf_rx_out += len;
buf_rx_out %= FIFO_SIZE;
}
}
void trace_buf_drain(usbd_device *dev, uint8_t ep)
{
(void) dev;
(void) ep;
trace_buf_push();
}
void trace_tick(void)
{
trace_buf_push();
}
void TRACEUART_ISR(void)
{
uint32_t flush = uart_is_interrupt_source(TRACEUART, UART_INT_RT);
while (!uart_is_rx_fifo_empty(TRACEUART)) {
uint32_t c = uart_recv(TRACEUART);
/* If the next increment of rx_in would put it at the same point
* as rx_out, the FIFO is considered full.
*/
if (((buf_rx_in + 1) % FIFO_SIZE) != buf_rx_out)
{
/* insert into FIFO */
buf_rx[buf_rx_in++] = c;
/* wrap out pointer */
if (buf_rx_in >= FIFO_SIZE)
{
buf_rx_in = 0;
}
} else {
flush = 1;
break;
}
}
if (flush) {
/* advance fifo out pointer by amount written */
trace_buf_push();
}
}

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/*
* This file is part of the Black Magic Debug project.
*
* Copyright (C) 2012 Black Sphere Technologies Ltd.
* Written by Gareth McMullin <gareth@blacksphere.co.nz>
*
* Copyright (C) 2014 Fredrik Ahlberg <fredrik@z80.se>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/cm3/scs.h>
#include <libopencm3/usb/usbd.h>
#include <libopencm3/usb/cdc.h>
#include <libopencm3/lm4f/rcc.h>
#include <libopencm3/lm4f/uart.h>
#include <platform.h>
#define FIFO_SIZE 128
/* RX Fifo buffer */
static uint8_t buf_rx[FIFO_SIZE];
/* Fifo in pointer, writes assumed to be atomic, should be only incremented within RX ISR */
static uint8_t buf_rx_in;
/* Fifo out pointer, writes assumed to be atomic, should be only incremented outside RX ISR */
static uint8_t buf_rx_out;
void usbuart_init(void)
{
UART_PIN_SETUP();
periph_clock_enable(USBUART_CLK);
__asm__("nop"); __asm__("nop"); __asm__("nop");
uart_disable(USBUART);
/* Setup UART parameters. */
uart_clock_from_sysclk(USBUART);
uart_set_baudrate(USBUART, 38400);
uart_set_databits(USBUART, 8);
uart_set_stopbits(USBUART, 1);
uart_set_parity(USBUART, UART_PARITY_NONE);
// Enable FIFO
uart_enable_fifo(USBUART);
// Set FIFO interrupt trigger levels to 1/8 full for RX buffer and
// 7/8 empty (1/8 full) for TX buffer
uart_set_fifo_trigger_levels(USBUART, UART_FIFO_RX_TRIG_1_8, UART_FIFO_TX_TRIG_7_8);
uart_clear_interrupt_flag(USBUART, UART_INT_RX | UART_INT_RT);
/* Enable interrupts */
uart_enable_interrupts(UART0, UART_INT_RX| UART_INT_RT);
/* Finally enable the USART. */
uart_enable(USBUART);
//nvic_set_priority(USBUSART_IRQ, IRQ_PRI_USBUSART);
nvic_enable_irq(USBUART_IRQ);
}
void usbuart_set_line_coding(struct usb_cdc_line_coding *coding)
{
uart_set_baudrate(USBUART, coding->dwDTERate);
uart_set_databits(USBUART, coding->bDataBits);
switch(coding->bCharFormat) {
case 0:
case 1:
uart_set_stopbits(USBUART, 1);
break;
case 2:
uart_set_stopbits(USBUART, 2);
break;
}
switch(coding->bParityType) {
case 0:
uart_set_parity(USBUART, UART_PARITY_NONE);
break;
case 1:
uart_set_parity(USBUART, UART_PARITY_ODD);
break;
case 2:
uart_set_parity(USBUART, UART_PARITY_EVEN);
break;
}
}
void usbuart_usb_out_cb(usbd_device *dev, uint8_t ep)
{
(void)ep;
char buf[CDCACM_PACKET_SIZE];
int len = usbd_ep_read_packet(dev, CDCACM_UART_ENDPOINT,
buf, CDCACM_PACKET_SIZE);
for(int i = 0; i < len; i++)
uart_send_blocking(USBUART, buf[i]);
}
void usbuart_usb_in_cb(usbd_device *dev, uint8_t ep)
{
(void) dev;
(void) ep;
}
/*
* Read a character from the UART RX and stuff it in a software FIFO.
* Allowed to read from FIFO out pointer, but not write to it.
* Allowed to write to FIFO in pointer.
*/
void USBUART_ISR(void)
{
int flush = uart_is_interrupt_source(USBUART, UART_INT_RT);
while (!uart_is_rx_fifo_empty(USBUART)) {
char c = uart_recv(USBUART);
/* If the next increment of rx_in would put it at the same point
* as rx_out, the FIFO is considered full.
*/
if (((buf_rx_in + 1) % FIFO_SIZE) != buf_rx_out)
{
/* insert into FIFO */
buf_rx[buf_rx_in++] = c;
/* wrap out pointer */
if (buf_rx_in >= FIFO_SIZE)
{
buf_rx_in = 0;
}
} else {
flush = 1;
}
}
if (flush) {
/* forcibly empty fifo if no USB endpoint */
if (cdcacm_get_config() != 1)
{
buf_rx_out = buf_rx_in;
return;
}
uint8_t packet_buf[CDCACM_PACKET_SIZE];
uint8_t packet_size = 0;
uint8_t buf_out = buf_rx_out;
/* copy from uart FIFO into local usb packet buffer */
while (buf_rx_in != buf_out && packet_size < CDCACM_PACKET_SIZE)
{
packet_buf[packet_size++] = buf_rx[buf_out++];
/* wrap out pointer */
if (buf_out >= FIFO_SIZE)
{
buf_out = 0;
}
}
/* advance fifo out pointer by amount written */
buf_rx_out += usbd_ep_write_packet(usbdev,
CDCACM_UART_ENDPOINT, packet_buf, packet_size);
buf_rx_out %= FIFO_SIZE;
}
}