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-rw-r--r--bluefnorf/.gitignore8
-rw-r--r--bluefnorf/Makefile41
-rw-r--r--bluefnorf/main.c43
-rw-r--r--bluefnorf/openocd.cfg8
-rw-r--r--bluefnorf/stm32f103c8t6.ld14
-rw-r--r--bluefnorf/usb.c241
-rw-r--r--bluefnorf/usb.h12
7 files changed, 367 insertions, 0 deletions
diff --git a/bluefnorf/.gitignore b/bluefnorf/.gitignore
new file mode 100644
index 0000000..2c6eb8b
--- /dev/null
+++ b/bluefnorf/.gitignore
@@ -0,0 +1,8 @@
+*.bin
+*.hex
+*.o
+*.elf
+*.lst
+
+*.swp
+*.swo
diff --git a/bluefnorf/Makefile b/bluefnorf/Makefile
new file mode 100644
index 0000000..b500a1b
--- /dev/null
+++ b/bluefnorf/Makefile
@@ -0,0 +1,41 @@
+
+OPENCM3_PATH ?= $(HOME)/resource/libopencm3
+
+CC := arm-none-eabi-gcc
+OBJCOPY := arm-none-eabi-objcopy
+OBJDUMP := arm-none-eabi-objdump
+SIZE := arm-none-eabi-size
+AS = arm-none-eabi-as
+
+CFLAGS = -Wall -Wextra -g -std=gnu11 -O1
+CFLAGS += -mlittle-endian -mthumb -mcpu=cortex-m3 -mfix-cortex-m3-ldrd -msoft-float
+#CFLAGS += -ffunction-sections -fdata-sections -Wl,--gc-sections
+#CFLAGS += -Wl,-Map=main.map
+CFLAGS += -Tstm32f103c8t6.ld --static -nostartfiles
+CFLAGS += -I$(OPENCM3_PATH)/include -L$(OPENCM3_PATH)/lib
+CFLAGS += -DSTM32F1
+
+LDFLAGS += -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
+LDFLAGS += -lopencm3_stm32f1 -lm
+
+all: main.elf
+
+%.o: %.c
+ $(CC) $(CFLAGS) -c -o $@ $<
+
+main.elf: main.o usb.o
+ $(CC) $(CFLAGS) -o main.elf main.o usb.o $(LDFLAGS)
+
+ $(OBJCOPY) -O ihex $@ $(@:.elf=.hex)
+ $(OBJCOPY) -O binary $@ $(@:.elf=.bin)
+ $(OBJDUMP) -St $@ >$(@:.elf=.lst)
+ $(SIZE) $@
+
+flash: main.elf
+ openocd -f openocd.cfg -c "program $< verify reset exit"
+
+clean:
+ rm -f $(addprefix main,.o .hex .lst .map .elf .bin)
+
+.PHONY: flash clean
+
diff --git a/bluefnorf/main.c b/bluefnorf/main.c
new file mode 100644
index 0000000..540b41b
--- /dev/null
+++ b/bluefnorf/main.c
@@ -0,0 +1,43 @@
+/*
+ * ADC test: Try to get as many samples as possible
+ * using fast interleave mode and DMA
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include <libopencm3/cm3/nvic.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/adc.h>
+#include <libopencm3/stm32/dma.h>
+
+#include "usb.h"
+
+int main(void)
+{
+ int i = 0;
+ // const char* line;
+
+ // Clock Setup
+ rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+ // Initialize USB
+ usb_serial_init();
+
+ while (1) {
+ /*
+ if( i % 100000 == 0 ) {
+ // Read ADC
+ printf("Fnord 42 :: %d %d\r\n", _adc_samples[0], _adc_samples[1]);
+ }
+ */
+
+ i++;
+ }
+}
+
+void hard_fault_handler(void) {
+ while (23);
+}
diff --git a/bluefnorf/openocd.cfg b/bluefnorf/openocd.cfg
new file mode 100644
index 0000000..99e0019
--- /dev/null
+++ b/bluefnorf/openocd.cfg
@@ -0,0 +1,8 @@
+
+telnet_port 4444
+gdb_port 3333
+
+source [find interface/stlink-v2.cfg]
+
+source [find target/stm32f1x.cfg]
+
diff --git a/bluefnorf/stm32f103c8t6.ld b/bluefnorf/stm32f103c8t6.ld
new file mode 100644
index 0000000..f70bbb7
--- /dev/null
+++ b/bluefnorf/stm32f103c8t6.ld
@@ -0,0 +1,14 @@
+
+__estack = 0x20005000;
+
+
+MEMORY
+{
+ rom (rx) : ORIGIN = 0x08000000, LENGTH = 64K
+ ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+
+/* Include the common ld script. */
+INCLUDE cortex-m-generic.ld
+
diff --git a/bluefnorf/usb.c b/bluefnorf/usb.c
new file mode 100644
index 0000000..00f363d
--- /dev/null
+++ b/bluefnorf/usb.c
@@ -0,0 +1,241 @@
+
+
+/*
+ * Initialize USB ACM serial device, provide convenience
+ * function for serial communication.
+ *
+ * Mostly plucked together from some opencm3 example code.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/usb/usbd.h>
+#include <libopencm3/usb/cdc.h>
+#include <libopencm3/cm3/nvic.h>
+
+#include "usb.h"
+
+#define STATUS_LED_PORT GPIOC
+#define STATUS_LED_PIN GPIO13
+
+#define USBD_PORT GPIOA
+#define USBDM GPIO11
+#define USBDP GPIO12
+
+#define RX_ECHO 1
+#define RX_BUF_LEN 256
+
+static char rx_tmp[RX_BUF_LEN];
+static char rx_buf[RX_BUF_LEN];
+
+static size_t rx_tmp_len;
+static uint8_t rx_buf_ready;
+
+static usbd_device *usbd_dev;
+
+/* Buffer to be used for control requests. */
+uint8_t usbd_control_buffer[128];
+
+static const struct usb_device_descriptor device_descriptor = {
+ .bLength = USB_DT_DEVICE_SIZE,
+ .bDescriptorType = USB_DT_DEVICE,
+ .bcdUSB = 0x0200,
+ .bDeviceClass = 0xfe, // USB_CLASS_CDC,
+ .bDeviceSubClass = 0,
+ .bDeviceProtocol = 0,
+ .bMaxPacketSize0 = 64,
+ .idVendor = 0x1209,
+ .idProduct = 0x4001,
+ .bcdDevice = 0x0200,
+ .iManufacturer = 1,
+ .iProduct = 2,
+ .iSerialNumber = 3,
+ .bNumConfigurations = 1,
+};
+
+static const struct usb_endpoint_descriptor comm_endp[] = {{
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 0x83,
+ .bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
+ .wMaxPacketSize = 16,
+ .bInterval = 255,
+}};
+
+static const struct usb_endpoint_descriptor data_endp[] = {{
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 0x01,
+ .bmAttributes = USB_ENDPOINT_ATTR_BULK,
+ .wMaxPacketSize = 64,
+ .bInterval = 1,
+}, {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 0x82,
+ .bmAttributes = USB_ENDPOINT_ATTR_BULK,
+ .wMaxPacketSize = 64,
+ .bInterval = 1,
+}};
+
+static const struct usb_interface_descriptor comm_iface[] = {{
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = 0,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 1,
+ .bInterfaceClass = 0xfe, // USB_CLASS_CDC,
+ .bInterfaceSubClass = 0x00, // USB_CDC_SUBCLASS_ACM,
+ .bInterfaceProtocol = 0x00, // USB_CDC_PROTOCOL_AT,
+ .iInterface = 0,
+
+ .endpoint = comm_endp,
+
+ .extra = NULL, // &cdcacm_functional_descriptors,
+ .extralen = 0,
+}};
+
+static const struct usb_interface_descriptor 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 = data_endp,
+}};
+
+static const struct usb_interface ifaces[] = {{
+ .num_altsetting = 1,
+ .altsetting = comm_iface,
+}, {
+ .num_altsetting = 1,
+ .altsetting = data_iface,
+}};
+
+static const struct usb_config_descriptor config = {
+ .bLength = USB_DT_CONFIGURATION_SIZE,
+ .bDescriptorType = USB_DT_CONFIGURATION,
+ .wTotalLength = 0,
+ .bNumInterfaces = 2,
+ .bConfigurationValue = 1,
+ .iConfiguration = 0,
+ .bmAttributes = 0x80,
+ .bMaxPower = 0x32,
+
+ .interface = ifaces,
+};
+
+
+static const char *usb_strings[] = {
+ "Chaos Computer Club Berlin e.V.",
+ "bluefnorf",
+ "bf1",
+};
+
+
+void usb_gpio_init() {
+ // Clock
+ rcc_periph_clock_enable(RCC_GPIOA);
+ rcc_periph_clock_enable(RCC_GPIOC);
+
+ // D+
+ gpio_set_mode(USBD_PORT,
+ GPIO_MODE_OUTPUT_2_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL,
+ USBDP);
+
+ // LED
+ gpio_set_mode(STATUS_LED_PORT,
+ GPIO_MODE_OUTPUT_2_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL,
+ STATUS_LED_PIN);
+
+}
+
+void usb_status_led_toggle() {
+ gpio_toggle(STATUS_LED_PORT, STATUS_LED_PIN);
+}
+
+static void usb_data_rx_cb(usbd_device *usbd_dev, uint8_t ep) {
+ char buf[64];
+
+ int len = usbd_ep_read_packet(usbd_dev, ep, buf, 64);
+
+ if (len) {
+ usbd_ep_write_packet(usbd_dev, 0x82, buf, len);
+ }
+}
+
+static enum usbd_request_return_codes usb_control_request_cb(usbd_device *usbd_dev, struct usb_setup_data *req,
+ uint8_t **buf, uint16_t *len, usbd_control_complete_callback *complete) {
+ (void)usbd_dev;
+ (void)req;
+ (void)buf;
+ (void)len;
+ (void)complete;
+ return 0;
+}
+
+static void usb_set_config_cb(usbd_device *usbd_dev, uint16_t wValue) {
+ (void)wValue;
+
+ usbd_ep_setup(usbd_dev, 0x01, USB_ENDPOINT_ATTR_BULK, 64, usb_data_rx_cb);
+ usbd_ep_setup(usbd_dev, 0x82, USB_ENDPOINT_ATTR_BULK, 64, NULL);
+
+ usbd_register_control_callback(
+ usbd_dev,
+ USB_REQ_TYPE_CLASS | USB_REQ_TYPE_INTERFACE,
+ USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
+ usb_control_request_cb
+ );
+}
+
+usbd_device *usb_serial_init() {
+ // Initialize GPIO
+ usb_gpio_init();
+
+ // Initialize buffers
+ memset(rx_tmp, 0, RX_BUF_LEN);
+ memset(rx_buf, 0, RX_BUF_LEN);
+
+ rx_tmp_len = 0;
+ rx_buf_ready = 0;
+
+ // Pull down D+
+ gpio_clear(USBD_PORT, USBDP);
+ for (int i = 0; i < 0x10000; i++) {
+ __asm__("nop");
+ }
+ gpio_set(USBD_PORT, USBDP);
+
+ // Initialize usb device
+ usbd_dev = usbd_init(&st_usbfs_v1_usb_driver,
+ &device_descriptor,
+ &config,
+ usb_strings, 3,
+ usbd_control_buffer, sizeof(usbd_control_buffer));
+
+ usbd_register_set_config_callback(usbd_dev, usb_set_config_cb);
+
+ // Pull down
+ gpio_clear(USBD_PORT, USBDP);
+
+ nvic_enable_irq(NVIC_USB_LP_CAN_RX0_IRQ);
+
+ return usbd_dev;
+}
+
+void usb_lp_can_rx0_isr() {
+ usbd_poll(usbd_dev);
+ nvic_clear_pending_irq(NVIC_USB_LP_CAN_RX0_IRQ);
+}
diff --git a/bluefnorf/usb.h b/bluefnorf/usb.h
new file mode 100644
index 0000000..ad75684
--- /dev/null
+++ b/bluefnorf/usb.h
@@ -0,0 +1,12 @@
+#ifndef __USB_H__
+#define __USB_H__
+
+#include <libopencm3/usb/usbd.h>
+
+usbd_device* usb_serial_init();
+const char* usb_serial_rx();
+size_t usb_serial_tx(const char*, size_t);
+
+
+#endif
+
generated by cgit (git 2.34.1) at 2025-02-20 03:41:10 +0000