From 6ce2c6e13d5d860edc1bafc2606b2b9aa45b444f Mon Sep 17 00:00:00 2001 From: Weston Schmidt Date: Tue, 26 Feb 2013 02:41:25 -0800 Subject: Add a few example programs for the Leaf Maple / IteadMaple boards. --- examples/stm32/f1/stm32-maple/miniblink/Makefile | 25 ++ examples/stm32/f1/stm32-maple/miniblink/README | 9 + .../stm32/f1/stm32-maple/miniblink/miniblink.c | 71 ++++++ examples/stm32/f1/stm32-maple/stm32-maple.ld | 32 +++ examples/stm32/f1/stm32-maple/usart/Makefile | 25 ++ examples/stm32/f1/stm32-maple/usart/README | 13 + examples/stm32/f1/stm32-maple/usart/usart.c | 82 +++++++ examples/stm32/f1/stm32-maple/usart_irq/Makefile | 25 ++ .../stm32/f1/stm32-maple/usart_irq/usart_irq.c | 120 ++++++++++ examples/stm32/f1/stm32-maple/usb_cdcacm/Makefile | 25 ++ examples/stm32/f1/stm32-maple/usb_cdcacm/README | 7 + examples/stm32/f1/stm32-maple/usb_cdcacm/cdcacm.c | 266 +++++++++++++++++++++ 12 files changed, 700 insertions(+) create mode 100644 examples/stm32/f1/stm32-maple/miniblink/Makefile create mode 100644 examples/stm32/f1/stm32-maple/miniblink/README create mode 100644 examples/stm32/f1/stm32-maple/miniblink/miniblink.c create mode 100644 examples/stm32/f1/stm32-maple/stm32-maple.ld create mode 100644 examples/stm32/f1/stm32-maple/usart/Makefile create mode 100644 examples/stm32/f1/stm32-maple/usart/README create mode 100644 examples/stm32/f1/stm32-maple/usart/usart.c create mode 100644 examples/stm32/f1/stm32-maple/usart_irq/Makefile create mode 100644 examples/stm32/f1/stm32-maple/usart_irq/usart_irq.c create mode 100644 examples/stm32/f1/stm32-maple/usb_cdcacm/Makefile create mode 100644 examples/stm32/f1/stm32-maple/usb_cdcacm/README create mode 100644 examples/stm32/f1/stm32-maple/usb_cdcacm/cdcacm.c (limited to 'examples/stm32/f1/stm32-maple') 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 +## +## 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 . +## + +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 + * + * 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 . + */ + +#include +#include + +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 + * + * 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 . + */ + +/* 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 +## +## 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 . +## + +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 + * + * 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 . + */ + +#include +#include +#include + +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 +## +## 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 . +## + +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 + * + * 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 . + */ + +#include +#include +#include +#include +#include + +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 +## +## 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 . +## + +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 + * + * 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 . + */ + +#include +#include +#include +#include +#include +#include + +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); +} -- cgit v1.2.3