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authorWeston Schmidt2013-02-26 02:41:25 -0800
committerPiotr Esden-Tempski2013-02-26 19:50:13 -0800
commit6ce2c6e13d5d860edc1bafc2606b2b9aa45b444f (patch)
tree10eeefad4d6eb9d45eda99ce27cc51da8f287806
parentb3d895bc6489e7b20af49d8f639436b4d3b679ce (diff)
Add a few example programs for the Leaf Maple / IteadMaple boards.
-rw-r--r--examples/stm32/f1/stm32-maple/miniblink/Makefile25
-rw-r--r--examples/stm32/f1/stm32-maple/miniblink/README9
-rw-r--r--examples/stm32/f1/stm32-maple/miniblink/miniblink.c71
-rw-r--r--examples/stm32/f1/stm32-maple/stm32-maple.ld32
-rw-r--r--examples/stm32/f1/stm32-maple/usart/Makefile25
-rw-r--r--examples/stm32/f1/stm32-maple/usart/README13
-rw-r--r--examples/stm32/f1/stm32-maple/usart/usart.c82
-rw-r--r--examples/stm32/f1/stm32-maple/usart_irq/Makefile25
-rw-r--r--examples/stm32/f1/stm32-maple/usart_irq/usart_irq.c120
-rw-r--r--examples/stm32/f1/stm32-maple/usb_cdcacm/Makefile25
-rw-r--r--examples/stm32/f1/stm32-maple/usb_cdcacm/README7
-rw-r--r--examples/stm32/f1/stm32-maple/usb_cdcacm/cdcacm.c266
12 files changed, 700 insertions, 0 deletions
diff --git a/examples/stm32/f1/stm32-maple/miniblink/Makefile b/examples/stm32/f1/stm32-maple/miniblink/Makefile
new file mode 100644
index 0000000..f29af30
--- /dev/null
+++ b/examples/stm32/f1/stm32-maple/miniblink/Makefile
@@ -0,0 +1,25 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This library is free software: you can redistribute it and/or modify
+## it under the terms of the GNU Lesser General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This library 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 Lesser General Public License for more details.
+##
+## You should have received a copy of the GNU Lesser General Public License
+## along with this library. If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = miniblink
+
+LDSCRIPT = ../stm32-maple.ld
+
+include ../../Makefile.include
+
diff --git a/examples/stm32/f1/stm32-maple/miniblink/README b/examples/stm32/f1/stm32-maple/miniblink/README
new file mode 100644
index 0000000..6e38d7a
--- /dev/null
+++ b/examples/stm32/f1/stm32-maple/miniblink/README
@@ -0,0 +1,9 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This is the smallest-possible example program using libopencm3.
+
+It's intended for the ST STM32-based Leaf Labs Maple board (see
+http://leaflabs.com for details). It should blink the LED on the board.
+
diff --git a/examples/stm32/f1/stm32-maple/miniblink/miniblink.c b/examples/stm32/f1/stm32-maple/miniblink/miniblink.c
new file mode 100644
index 0000000..e5b9e43
--- /dev/null
+++ b/examples/stm32/f1/stm32-maple/miniblink/miniblink.c
@@ -0,0 +1,71 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/f1/rcc.h>
+#include <libopencm3/stm32/f1/gpio.h>
+
+void gpio_setup(void)
+{
+ /* Enable GPIOA clock. */
+ /* Manually: */
+ // RCC_APB2ENR |= RCC_APB2ENR_IOPCEN;
+ /* Using API functions: */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+ /* Set GPIO5 (in GPIO port A) to 'output push-pull'. */
+ /* Manually: */
+ // GPIOA_CRH = (GPIO_CNF_OUTPUT_PUSHPULL << (((5 - 8) * 4) + 2));
+ // GPIOA_CRH |= (GPIO_MODE_OUTPUT_2_MHZ << ((5 - 8) * 4));
+ /* Using API functions: */
+ gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO5);
+}
+
+int main(void)
+{
+ int i;
+
+ gpio_setup();
+
+ /* Blink the LED (PA5) on the board. */
+ while (1) {
+ /* Manually: */
+ // GPIOA_BSRR = GPIO5; /* LED off */
+ // for (i = 0; i < 800000; i++) /* Wait a bit. */
+ // __asm__("nop");
+ // GPIOA_BRR = GPIO5; /* LED on */
+ // for (i = 0; i < 800000; i++) /* Wait a bit. */
+ // __asm__("nop");
+
+ /* Using API functions gpio_set()/gpio_clear(): */
+ // gpio_set(GPIOA, GPIO5); /* LED off */
+ // for (i = 0; i < 800000; i++) /* Wait a bit. */
+ // __asm__("nop");
+ // gpio_clear(GPIOA, GPIO5); /* LED on */
+ // for (i = 0; i < 800000; i++) /* Wait a bit. */
+ // __asm__("nop");
+
+ /* Using API function gpio_toggle(): */
+ gpio_toggle(GPIOA, GPIO5); /* LED on/off */
+ for (i = 0; i < 800000; i++) /* Wait a bit. */
+ __asm__("nop");
+ }
+
+ return 0;
+}
diff --git a/examples/stm32/f1/stm32-maple/stm32-maple.ld b/examples/stm32/f1/stm32-maple/stm32-maple.ld
new file mode 100644
index 0000000..65860a4
--- /dev/null
+++ b/examples/stm32/f1/stm32-maple/stm32-maple.ld
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Leaf Maple (STM32F103RBT6, 128K flash, 20K RAM,
+ * minus 20k flash and 3k RAM for the DFU bootloader). */
+
+/* Define memory regions. */
+MEMORY
+{
+ rom (rx) : ORIGIN = 0x08005000, LENGTH = 108K
+ ram (rwx) : ORIGIN = 0x20000c00, LENGTH = 17K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32f1.ld
+
diff --git a/examples/stm32/f1/stm32-maple/usart/Makefile b/examples/stm32/f1/stm32-maple/usart/Makefile
new file mode 100644
index 0000000..25623b6
--- /dev/null
+++ b/examples/stm32/f1/stm32-maple/usart/Makefile
@@ -0,0 +1,25 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This library is free software: you can redistribute it and/or modify
+## it under the terms of the GNU Lesser General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This library 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 Lesser General Public License for more details.
+##
+## You should have received a copy of the GNU Lesser General Public License
+## along with this library. If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = usart
+
+LDSCRIPT = ../stm32-maple.ld
+
+include ../../Makefile.include
+
diff --git a/examples/stm32/f1/stm32-maple/usart/README b/examples/stm32/f1/stm32-maple/usart/README
new file mode 100644
index 0000000..ecd7269
--- /dev/null
+++ b/examples/stm32/f1/stm32-maple/usart/README
@@ -0,0 +1,13 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This example program sends some characters on USART3 on the ST STM32-based
+Olimex STM32-H103 eval board (see http://olimex.com/dev/stm32-h103.html
+for details).
+
+The terminal settings for the receiving device/PC are 38400 8n1.
+
+The sending is done in a blocking way in the code, see the usart_irq example
+for a more elaborate USART example.
+
diff --git a/examples/stm32/f1/stm32-maple/usart/usart.c b/examples/stm32/f1/stm32-maple/usart/usart.c
new file mode 100644
index 0000000..0b7991a
--- /dev/null
+++ b/examples/stm32/f1/stm32-maple/usart/usart.c
@@ -0,0 +1,82 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/f1/rcc.h>
+#include <libopencm3/stm32/f1/gpio.h>
+#include <libopencm3/stm32/usart.h>
+
+void clock_setup(void)
+{
+ rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+ /* Enable GPIOA clock. */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
+
+ /* Enable clocks for GPIO port A (for GPIO_USART2_TX) and USART2. */
+ rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USART2EN);
+}
+
+void usart_setup(void)
+{
+ /* Setup GPIO pin GPIO_USART2_TX. */
+ gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
+ GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART2_TX);
+
+ /* Setup UART parameters. */
+ usart_set_baudrate(USART2, 38400);
+ usart_set_databits(USART2, 8);
+ usart_set_stopbits(USART2, USART_STOPBITS_1);
+ usart_set_mode(USART2, USART_MODE_TX);
+ usart_set_parity(USART2, USART_PARITY_NONE);
+ usart_set_flow_control(USART2, USART_FLOWCONTROL_NONE);
+
+ /* Finally enable the USART. */
+ usart_enable(USART2);
+}
+
+void gpio_setup(void)
+{
+ /* Set GPIO (in GPIO port A) to 'output push-pull'. */
+ gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO5);
+}
+
+int main(void)
+{
+ int i, j = 0, c = 0;
+
+ clock_setup();
+ gpio_setup();
+ usart_setup();
+
+ /* Blink the LED (PA5) on the board with every transmitted byte. */
+ while (1) {
+ gpio_toggle(GPIOA, GPIO5); /* LED on/off */
+ usart_send_blocking(USART2, c + '0'); /* USART2: Send byte. */
+ c = (c == 9) ? 0 : c + 1; /* Increment c. */
+ if ((j++ % 80) == 0) { /* Newline after line full. */
+ usart_send_blocking(USART2, '\r');
+ usart_send_blocking(USART2, '\n');
+ }
+ for (i = 0; i < 8000000; i++) /* Wait a bit. */
+ __asm__("nop");
+ }
+
+ return 0;
+}
diff --git a/examples/stm32/f1/stm32-maple/usart_irq/Makefile b/examples/stm32/f1/stm32-maple/usart_irq/Makefile
new file mode 100644
index 0000000..c2eed17
--- /dev/null
+++ b/examples/stm32/f1/stm32-maple/usart_irq/Makefile
@@ -0,0 +1,25 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This library is free software: you can redistribute it and/or modify
+## it under the terms of the GNU Lesser General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This library 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 Lesser General Public License for more details.
+##
+## You should have received a copy of the GNU Lesser General Public License
+## along with this library. If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = usart_irq
+
+LDSCRIPT = ../stm32-maple.ld
+
+include ../../Makefile.include
+
diff --git a/examples/stm32/f1/stm32-maple/usart_irq/usart_irq.c b/examples/stm32/f1/stm32-maple/usart_irq/usart_irq.c
new file mode 100644
index 0000000..bbb2515
--- /dev/null
+++ b/examples/stm32/f1/stm32-maple/usart_irq/usart_irq.c
@@ -0,0 +1,120 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/f1/rcc.h>
+#include <libopencm3/stm32/f1/gpio.h>
+#include <libopencm3/stm32/usart.h>
+#include <libopencm3/cm3/nvic.h>
+#include <libopencm3/cm3/scb.h>
+
+void clock_setup(void)
+{
+ rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+ /* Enable GPIOA clock. */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
+
+ /* Enable clocks for GPIO port A (for LED GPIO_USART2_TX) and USART2. */
+ rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USART2EN);
+}
+
+void usart_setup(void)
+{
+ /* Enable the USART2 interrupt. */
+ nvic_enable_irq(NVIC_USART2_IRQ);
+
+ /* Setup GPIO pin GPIO_USART2_RE_TX on GPIO port A for transmit. */
+ gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
+ GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART2_TX);
+
+ /* Setup GPIO pin GPIO_USART2_RE_RX on GPIO port A for receive. */
+ gpio_set_mode(GPIOA, GPIO_MODE_INPUT,
+ GPIO_CNF_INPUT_FLOAT, GPIO_USART2_RX);
+
+ /* Setup UART parameters. */
+ usart_set_baudrate(USART2, 38400);
+ usart_set_databits(USART2, 8);
+ usart_set_stopbits(USART2, USART_STOPBITS_1);
+ usart_set_parity(USART2, USART_PARITY_NONE);
+ usart_set_flow_control(USART2, USART_FLOWCONTROL_NONE);
+ usart_set_mode(USART2, USART_MODE_TX_RX);
+
+ /* Enable USART2 Receive interrupt. */
+ USART_CR1(USART2) |= USART_CR1_RXNEIE;
+
+ /* Finally enable the USART. */
+ usart_enable(USART2);
+}
+
+void gpio_setup(void)
+{
+ gpio_set(GPIOA, GPIO5);
+
+ /* Setup GPIO5 (in GPIO port A) for LED use. */
+ gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO5);
+}
+
+void usart2_isr(void)
+{
+ static u8 data = 'A';
+
+ /* Check if we were called because of RXNE. */
+ if (((USART_CR1(USART2) & USART_CR1_RXNEIE) != 0) &&
+ ((USART_SR(USART2) & USART_SR_RXNE) != 0)) {
+
+ /* Indicate that we got data. */
+ gpio_toggle(GPIOA, GPIO5);
+
+ /* Retrieve the data from the peripheral. */
+ data = usart_recv(USART2);
+
+ /* Enable transmit interrupt so it sends back the data. */
+ USART_CR1(USART2) |= USART_CR1_TXEIE;
+ }
+
+ /* Check if we were called because of TXE. */
+ if (((USART_CR1(USART2) & USART_CR1_TXEIE) != 0) &&
+ ((USART_SR(USART2) & USART_SR_TXE) != 0)) {
+
+ /* Indicate that we are sending out data. */
+ // gpio_toggle(GPIOA, GPIO5);
+
+ /* Put data into the transmit register. */
+ usart_send(USART2, data);
+
+ /* Disable the TXE interrupt as we don't need it anymore. */
+ USART_CR1(USART2) &= ~USART_CR1_TXEIE;
+ }
+}
+
+int main(void)
+{
+ SCB_VTOR = (u32) 0x08005000;
+
+ clock_setup();
+ gpio_setup();
+ usart_setup();
+
+ /* Wait forever and do nothing. */
+ while (1)
+ __asm__("nop");
+
+ return 0;
+}
diff --git a/examples/stm32/f1/stm32-maple/usb_cdcacm/Makefile b/examples/stm32/f1/stm32-maple/usb_cdcacm/Makefile
new file mode 100644
index 0000000..46e3d1d
--- /dev/null
+++ b/examples/stm32/f1/stm32-maple/usb_cdcacm/Makefile
@@ -0,0 +1,25 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This library is free software: you can redistribute it and/or modify
+## it under the terms of the GNU Lesser General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This library 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 Lesser General Public License for more details.
+##
+## You should have received a copy of the GNU Lesser General Public License
+## along with this library. If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = cdcacm
+
+LDSCRIPT = ../stm32-maple.ld
+
+include ../../Makefile.include
+
diff --git a/examples/stm32/f1/stm32-maple/usb_cdcacm/README b/examples/stm32/f1/stm32-maple/usb_cdcacm/README
new file mode 100644
index 0000000..2f1ee4b
--- /dev/null
+++ b/examples/stm32/f1/stm32-maple/usb_cdcacm/README
@@ -0,0 +1,7 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This example implements a USB CDC-ACM device (aka Virtual Serial Port)
+to demonstrate the use of the USB device stack.
+
diff --git a/examples/stm32/f1/stm32-maple/usb_cdcacm/cdcacm.c b/examples/stm32/f1/stm32-maple/usb_cdcacm/cdcacm.c
new file mode 100644
index 0000000..0e67961
--- /dev/null
+++ b/examples/stm32/f1/stm32-maple/usb_cdcacm/cdcacm.c
@@ -0,0 +1,266 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <libopencm3/stm32/f1/rcc.h>
+#include <libopencm3/stm32/f1/gpio.h>
+#include <libopencm3/usb/usbd.h>
+#include <libopencm3/usb/cdc.h>
+#include <libopencm3/cm3/scb.h>
+
+static const struct usb_device_descriptor dev = {
+ .bLength = USB_DT_DEVICE_SIZE,
+ .bDescriptorType = USB_DT_DEVICE,
+ .bcdUSB = 0x0200,
+ .bDeviceClass = USB_CLASS_CDC,
+ .bDeviceSubClass = 0,
+ .bDeviceProtocol = 0,
+ .bMaxPacketSize0 = 64,
+ .idVendor = 0x0483,
+ .idProduct = 0x5740,
+ .bcdDevice = 0x0200,
+ .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 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 {
+ 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)) 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 = 0,
+ },
+ .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 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 = 0,
+
+ .endpoint = comm_endp,
+
+ .extra = &cdcacm_functional_descriptors,
+ .extralen = sizeof(cdcacm_functional_descriptors),
+}};
+
+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[] = {
+ "Black Sphere Technologies",
+ "CDC-ACM Demo",
+ "DEMO",
+};
+
+static int cdcacm_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, u8 **buf,
+ u16 *len, void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
+{
+ (void)complete;
+ (void)buf;
+ (void)usbd_dev;
+
+ switch (req->bRequest) {
+ case USB_CDC_REQ_SET_CONTROL_LINE_STATE: {
+ /*
+ * This Linux cdc_acm driver requires this to be implemented
+ * even though it's optional in the CDC spec, and we don't
+ * advertise it in the ACM functional descriptor.
+ */
+ 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] = req->wValue & 3;
+ buf[9] = 0;
+ // usbd_ep_write_packet(0x83, buf, 10);
+ return 1;
+ }
+ case USB_CDC_REQ_SET_LINE_CODING:
+ if (*len < sizeof(struct usb_cdc_line_coding))
+ return 0;
+ return 1;
+ }
+ return 0;
+}
+
+static void cdcacm_data_rx_cb(usbd_device *usbd_dev, u8 ep)
+{
+ (void)ep;
+ (void)usbd_dev;
+
+ char buf[64];
+ int len = usbd_ep_read_packet(usbd_dev, 0x01, buf, 64);
+
+ if (len) {
+ usbd_ep_write_packet(usbd_dev, 0x82, buf, len);
+ buf[len] = 0;
+ }
+}
+
+static void cdcacm_set_config(usbd_device *usbd_dev, u16 wValue)
+{
+ (void)wValue;
+ (void)usbd_dev;
+
+ usbd_ep_setup(usbd_dev, 0x01, USB_ENDPOINT_ATTR_BULK, 64, cdcacm_data_rx_cb);
+ usbd_ep_setup(usbd_dev, 0x82, USB_ENDPOINT_ATTR_BULK, 64, NULL);
+ usbd_ep_setup(usbd_dev, 0x83, USB_ENDPOINT_ATTR_INTERRUPT, 16, NULL);
+
+ usbd_register_control_callback(
+ usbd_dev,
+ USB_REQ_TYPE_CLASS | USB_REQ_TYPE_INTERFACE,
+ USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
+ cdcacm_control_request);
+}
+
+int main(void)
+{
+ int i;
+
+ usbd_device *usbd_dev;
+
+ SCB_VTOR = (u32) 0x08005000;
+
+ rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN |
+ RCC_APB2ENR_IOPCEN);
+
+ /* Setup GPIOC Pin 12 to pull up the D+ high, so autodect works
+ * with the bootloader. The circuit is active low. */
+ gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
+ GPIO_CNF_OUTPUT_OPENDRAIN, GPIO12);
+ gpio_clear(GPIOC, GPIO12);
+
+ /* Setup GPIOA Pin 5 for the LED */
+ gpio_set(GPIOA, GPIO5);
+ gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO5);
+
+ usbd_dev = usbd_init(&stm32f103_usb_driver, &dev, &config, usb_strings, 3);
+ usbd_register_set_config_callback(usbd_dev, cdcacm_set_config);
+
+ for (i = 0; i < 0x800000; i++)
+ __asm__("nop");
+ gpio_clear(GPIOA, GPIO5);
+
+ while (1)
+ usbd_poll(usbd_dev);
+}