/**************************************************************************** * configs/b-l072z-lrwan1/src/stm32_boot.c * * Copyright (C) 2019 Gregory Nutt. All rights reserved. * Authors: Mateusz Szafoni * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #include #include "stm32_gpio.h" #include "stm32_exti.h" #include "stm32_spi.h" #include "b-l072z-lrwan1.h" /* WARNING: SX1276 on my CMWX1ZZABZ-091 module suddenly stopped * working (no SPI communication), so there might be a bug here, * something is missing in the configuration or something else. */ #warning SX127X driver support for B-L072Z-LRWAN1 needs some additional verification! /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* SX127X on SPI1 bus */ #define SX127X_SPI 1 /**************************************************************************** * Private Function Prototypes ****************************************************************************/ static void sx127x_chip_reset(void); static int sx127x_irq0_attach(xcpt_t isr, FAR void *arg); /**************************************************************************** * Private Data ****************************************************************************/ struct sx127x_lower_s lower = { .irq0attach = sx127x_irq0_attach, .reset = sx127x_chip_reset }; /**************************************************************************** * Private Functions ****************************************************************************/ static int sx127x_irq0_attach(xcpt_t isr, FAR void *arg) { wlinfo("Attach DIO0 IRQ\n"); /* IRQ on rising edge */ (void)stm32_gpiosetevent(GPIO_SX127X_DIO0, false, true, false, isr, arg); return OK; } static void sx127x_chip_reset(void) { wlinfo("SX127X RESET\n"); /* Configure reset as output */ stm32_configgpio(GPIO_SX127X_RESET | GPIO_OUTPUT | GPIO_SPEED_HIGH | GPIO_OUTPUT_CLEAR); /* Set pin to zero */ stm32_gpiowrite(GPIO_SX127X_RESET, false); /* Wait 1 ms */ usleep(1000); /* Configure reset as input */ stm32_configgpio(GPIO_SX127X_RESET | GPIO_INPUT | GPIO_FLOAT); /* Wait 10 ms */ usleep(10000); } /**************************************************************************** * Public Functions ****************************************************************************/ int stm32_lpwaninitialize(void) { FAR struct spi_dev_s *spidev; int ret = OK; wlinfo("Register the sx127x module\n"); /* Setup DIO0 */ stm32_configgpio(GPIO_SX127X_DIO0); /* Init SPI bus */ spidev = stm32_spibus_initialize(SX127X_SPI); if (!spidev) { wlerr("ERROR: Failed to initialize SPI %d bus\n", SX127X_SPI); ret = -ENODEV; goto errout; } /* Initialize SX127X */ ret = sx127x_register(spidev, &lower); if (ret < 0) { wlerr("ERROR: Failed to register sx127x\n"); goto errout; } errout: return ret; }