diff options
Diffstat (limited to 'tests/usb-serial-rs485/main-stm32f103-generic.c')
| -rw-r--r-- | tests/usb-serial-rs485/main-stm32f103-generic.c | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/tests/usb-serial-rs485/main-stm32f103-generic.c b/tests/usb-serial-rs485/main-stm32f103-generic.c deleted file mode 100644 index 415a18b..0000000 --- a/tests/usb-serial-rs485/main-stm32f103-generic.c +++ /dev/null @@ -1,204 +0,0 @@ -/* - * This file is part of the libopencm3 project. - * - * Copyright (C) 2014 Karl Palsson <karlp@tweak.net.au> - * - * 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/cm3/nvic.h> -#include <libopencm3/stm32/gpio.h> -#include <libopencm3/stm32/rcc.h> -#include <libopencm3/stm32/usart.h> - -#include <stdio.h> -#include "syscfg.h" -#include "usb_cdcacm.h" -#include "ringb.h" -#include "trace.h" - -#define ER_DEBUG -#ifdef ER_DEBUG -#define ER_DPRINTF(fmt, ...) \ - do { printf(fmt, ## __VA_ARGS__); } while (0) -#else -#define ER_DPRINTF(fmt, ...) \ - do { } while (0) -#endif - -static inline void gpio_really(uint32_t port, uint16_t pin, const bool set) -{ - int shift = set ? 0 : 16; - GPIO_BSRR(port) = pin << shift; -} - - -extern struct ringb rx_ring, tx_ring; -static void usart_setup(void) -{ - /* Enable the USART2 interrupt. */ - nvic_enable_irq(NVIC_USART2_IRQ); - - /* USART2 pins are on port A */ - rcc_periph_clock_enable(RCC_GPIOA); - gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ, - GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART2_TX); - gpio_set_mode(GPIOA, GPIO_MODE_INPUT, - GPIO_CNF_INPUT_PULL_UPDOWN, GPIO_USART2_RX); - - /* Enable clocks for USART2. */ - rcc_periph_clock_enable(RCC_USART2); - - /* Setup USART2 parameters. */ - usart_set_baudrate(USART2, 115200); - usart_set_databits(USART2, 8); - usart_set_stopbits(USART2, USART_STOPBITS_1); - usart_set_mode(USART2, USART_MODE_TX_RX); - usart_set_parity(USART2, USART_PARITY_NONE); - usart_set_flow_control(USART2, USART_FLOWCONTROL_NONE); - - /* Enable USART2 Receive interrupt. */ - usart_enable_rx_interrupt(USART2); - - /* Finally enable the USART. */ - usart_enable(USART2); -} - -void usart2_isr(void) -{ - gpio_really(GPIOA, GPIO5, 1); - // usbser-rxne() - /* Check if we were called because of RXNE. */ - if (usart_get_interrupt_source(USART2, USART_SR_RXNE)) { - gpio_set(LED_RX_PORT, LED_RX_PIN); - uint8_t c = usart_recv(USART2); - if (ringb_put(&rx_ring, c)) { - // good, - } else { - // fatal, you should always have drained by now. - // (when you've got it all ironed out, _actually_ - // just drop and count drops), but not yet... - ER_DPRINTF("rx buffer full\n"); - while(1); - } - trace_send8(STIMULUS_RING_PUSH, c); - gpio_clear(LED_RX_PORT, LED_RX_PIN); - } - // usbser-irq-txe() - if (usart_get_interrupt_source(USART2, USART_SR_TXE)) { - if (ringb_depth(&tx_ring) == 0) { - // turn off tx empty interrupts, nothing left to send - cdcacm_arch_txirq(0, 0); - ER_DPRINTF("OFF\n"); - // Turn on tx complete interrupts, for rs485 de - USART_CR1(USART2) |= USART_CR1_TCIE; - } else { - int c = ringb_get(&tx_ring); - usart_send(USART2, c); - } - } - // usbser-irq-txc? rs485 is auto on some devices, but can be emulated anyway - if (usart_get_interrupt_source(USART2, USART_SR_TC)) { - ER_DPRINTF("TC"); - // turn off the complete irqs, we're done now. - USART_CR1(USART2) &= ~USART_CR1_TCIE; - USART_SR(USART2) &= ~USART_SR_TC; - cdcacm_arch_pin(0, CDCACM_PIN_RS485DE, 0); - } - gpio_really(GPIOA, GPIO5, 0); -} - -void usb_cdcacm_setup_pre_arch(void) -{ - // Hack to reenumerate - gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, - GPIO_CNF_OUTPUT_PUSHPULL, GPIO12); - gpio_clear(GPIOA, GPIO12); - for (unsigned int i = 0; i < 800000; i++) { - __asm__("nop"); - } -} - -void usb_cdcacm_setup_post_arch(usbd_device *dev) -{ - (void)dev; -} - -void cdcacm_arch_pin(int port, enum cdcacm_pin pin, bool set) -{ - (void)port; // TODO if you want to handle multiple ports - switch (pin) { - case CDCACM_PIN_LED_TX: - gpio_really(LED_TX_PORT, LED_TX_PIN, set); - break; - case CDCACM_PIN_LED_RX: - gpio_really(LED_RX_PORT, LED_RX_PIN, set); - break; - case CDCACM_PIN_RS485DE: - gpio_really(RS485DE_PORT, RS485DE_PIN, set); - break; - default: - break; - } -} - -void cdcacm_arch_txirq(int port, bool set) { - (void)port; //FIXME if you make this multi port - if (set) { - usart_enable_tx_interrupt(USART2); - } else { - usart_disable_tx_interrupt(USART2); - } -} - -void cdcacm_arch_set_line_state(int port, uint8_t dtr, uint8_t rts) -{ - (void)port; // FIXME if you want multiple ports - (void) dtr; - (void) rts; - // LM4f has an implementation of this if you're keen -} - - - - -int main(void) -{ - rcc_clock_setup_in_hse_8mhz_out_72mhz(); - ER_DPRINTF("And we're alive!\n"); - /* Led */ - rcc_periph_clock_enable(RCC_GPIOC); - gpio_set_mode(LED_RX_PORT, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, LED_RX_PIN); - // IRQ timing - rcc_periph_clock_enable(RCC_GPIOA); - gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO5); - gpio_set_mode(RS485DE_PORT, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, RS485DE_PIN); - - usart_setup(); - - usb_cdcacm_setup_pre_arch(); - usbd_device *usbd_dev = usb_cdcacm_init(&st_usbfs_v1_usb_driver, - "stm32f103-generic"); - usb_cdcacm_setup_post_arch(usbd_dev); - - - ER_DPRINTF("Looping...\n"); - volatile int i = 0; - while (1) { - usbd_poll(usbd_dev); - usb_cdcacm_poll(usbd_dev); - } - -} - |