From b682b3e37aca0aa9263bbcda49393c210076736c Mon Sep 17 00:00:00 2001 From: Nathael Pajani Date: Thu, 10 Sep 2015 09:16:06 +0200 Subject: [PATCH] Simple example of RF commmunication for the RF-sub1GHz module. This one was called "dev_usb" in the rf_sub1G branch. This commit is part of manually merging the rf_sub1G branch. --- simple/Makefile | 13 ++ simple/README | 28 ++++ simple/main.c | 356 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 397 insertions(+) create mode 100644 simple/Makefile create mode 100644 simple/README create mode 100644 simple/main.c diff --git a/simple/Makefile b/simple/Makefile new file mode 100644 index 0000000..da530ea --- /dev/null +++ b/simple/Makefile @@ -0,0 +1,13 @@ +# Makefile for "rf_sub1G" apps +# This includes all apps for the RF-sub1GHz Modules. + +MODULE = $(shell basename $(shell cd .. && pwd && cd -)) +NAME = $(shell basename $(CURDIR)) + +.PHONY: $(NAME).bin +$(NAME).bin: + @make -C ../../.. --no-print-directory NAME=$(NAME) MODULE=$(MODULE) apps/$(MODULE)/$(NAME)/$@ + +clean mrproper: + @make -C ../../.. --no-print-directory $@ + diff --git a/simple/README b/simple/README new file mode 100644 index 0000000..de61e79 --- /dev/null +++ b/simple/README @@ -0,0 +1,28 @@ +Support for the Sub 1GHz module in USB or UEXT version + +Copyright 2013 Nathael Pajani + + +/* **************************************************************************** + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + * + *************************************************************************** */ + +This module uses the CC1101 transceiver to provide Sub 1GHz Rf connectivity. + +The module also integrates a TMP101 temparature sensor, the usual bi-color led +used for status, a RTC quartz, a DC-DC step-up for button battery power source +support, and an extension port with a set of gpio, including ADC (2), PWM (2), +I2C and SWD debug port. + diff --git a/simple/main.c b/simple/main.c new file mode 100644 index 0000000..0debbcb --- /dev/null +++ b/simple/main.c @@ -0,0 +1,356 @@ +/**************************************************************************** + * apps/dev_usb/main.c + * + * sub1G_module support code - USB version + * + * Copyright 2013-2014 Nathael Pajani + * + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + * + *************************************************************************** */ + + +#include +#include "core/lpc_regs_12xx.h" +#include "core/lpc_core_cm0.h" +#include "core/pio.h" +#include "core/system.h" +#include "core/systick.h" +#include "lib/stdio.h" +#include "drivers/serial.h" +#include "drivers/gpio.h" +#include "drivers/ssp.h" +#include "drivers/i2c.h" +#include "drivers/adc.h" +#include "extdrv/cc1101.h" +#include "extdrv/status_led.h" +#include "extdrv/tmp101_temp_sensor.h" + + +#define MODULE_VERSION 0x02 +#define MODULE_NAME "RF Sub1G - USB" + + +#define RF_868MHz 1 +#define RF_915MHz 0 +#if ((RF_868MHz) + (RF_915MHz) != 1) +#error Either RF_868MHz or RF_915MHz MUST be defined. +#endif + + +#define DEBUG 1 +#define BUFF_LEN 60 + +#define SELECTED_FREQ FREQ_SEL_48MHz + +/***************************************************************************** */ +/* Pins configuration */ +/* pins blocks are passed to set_pins() for pins configuration. + * Unused pin blocks can be removed safely with the corresponding set_pins() call + * All pins blocks may be safelly merged in a single block for single set_pins() call.. + */ +const struct pio_config common_pins[] = { + /* UART 0 */ + { LPC_UART0_RX_PIO_0_1, LPC_IO_DIGITAL }, + { LPC_UART0_TX_PIO_0_2, LPC_IO_DIGITAL }, + /* I2C 0 */ + { LPC_I2C0_SCL_PIO_0_10, (LPC_IO_DIGITAL | LPC_IO_OPEN_DRAIN_ENABLE) }, + { LPC_I2C0_SDA_PIO_0_11, (LPC_IO_DIGITAL | LPC_IO_OPEN_DRAIN_ENABLE) }, + /* SPI */ + { LPC_SSP0_SCLK_PIO_0_14, LPC_IO_DIGITAL }, + { LPC_SSP0_MOSI_PIO_0_17, LPC_IO_DIGITAL }, + { LPC_SSP0_MISO_PIO_0_16, LPC_IO_DIGITAL }, + /* ADC */ + { LPC_ADC_AD0_PIO_0_30, LPC_IO_ANALOG }, + { LPC_ADC_AD1_PIO_0_31, LPC_IO_ANALOG }, + { LPC_ADC_AD2_PIO_1_0, LPC_IO_ANALOG }, + ARRAY_LAST_PIO, +}; + +const struct pio cc1101_cs_pin = LPC_GPIO_0_15; +const struct pio cc1101_miso_pin = LPC_SSP0_MISO_PIO_0_16; +const struct pio cc1101_gdo0 = LPC_GPIO_0_6; +const struct pio cc1101_gdo2 = LPC_GPIO_0_7; + +#define TMP101_ADDR 0x94 +struct tmp101_sensor_config tmp101_sensor = { + .addr = TMP101_ADDR, + .resolution = TMP_RES_ELEVEN_BITS, +}; +const struct pio temp_alert = LPC_GPIO_0_3; + +const struct pio status_led_green = LPC_GPIO_0_28; +const struct pio status_led_red = LPC_GPIO_0_29; + + +#define ADC_VBAT LPC_ADC_NUM(0) +#define ADC_EXT1 LPC_ADC_NUM(1) +#define ADC_EXT2 LPC_ADC_NUM(2) + +/***************************************************************************** */ +void system_init() +{ + /* Stop the watchdog */ + stop_watchdog(); /* Do it right now, before it gets a chance to break in */ + + /* Note: Brown-Out detection must be powered to operate the ADC. adc_on() will power + * it back on if called after system_init() */ + system_brown_out_detection_config(0); + system_set_default_power_state(); + clock_config(SELECTED_FREQ); + set_pins(common_pins); + gpio_on(); + /* System tick timer MUST be configured and running in order to use the sleeping + * functions */ + systick_timer_on(1); /* 1ms */ + systick_start(); +} + +/* Define our fault handler. This one is not mandatory, the dummy fault handler + * will be used when it's not overridden here. + * Note : The default one does a simple infinite loop. If the watchdog is deactivated + * the system will hang. + */ +void fault_info(const char* name, uint32_t len) +{ + serial_write(0, name, len); + /* Wait for end of Tx */ + serial_flush(0); + /* FIXME : Perform soft reset of the micro-controller ! */ + while (1); +} + + + +/***************************************************************************** */ +/* Temperature */ +/* The Temperature Alert pin is on GPIO Port 0, pin 7 (PIO0_7) */ +/* The I2C Temperature sensor is at address 0x94 */ +void WAKEUP_Handler(void) +{ +} + +void temp_config() +{ + int ret = 0; + + /* Temp Alert */ + config_gpio(&temp_alert, LPC_IO_MODE_PULL_UP, GPIO_DIR_IN, 0); + /* FIXME : add a callback on temp_alert edge */ + + /* Temp sensor */ + ret = tmp101_sensor_config(&tmp101_sensor); + if (ret != 0) { + serial_write(0, "Temp config error\r\n", 19); + } +} + +/******************************************************************************/ +/* RF Communication */ +#define RF_BUFF_LEN 64 + +static volatile int check_rx = 0; +void rf_rx_calback(uint32_t gpio) +{ + check_rx = 1; +} + +static uint8_t rf_specific_settings[] = { + CC1101_REGS(gdo_config[2]), 0x07, /* GDO_0 - Assert on CRC OK | Disable temp sensor */ + CC1101_REGS(gdo_config[0]), 0x2E, /* GDO_2 - FIXME : do something usefull with it for tests */ + CC1101_REGS(pkt_ctrl[0]), 0x0F, /* Accept all sync, CRC err auto flush, Append, Addr check and Bcast */ +#if (RF_915MHz == 1) + /* FIXME : Add here a define protected list of settings for 915MHz configuration */ +#endif +}; + +/* RF config */ +void rf_config(void) +{ + config_gpio(&cc1101_gdo0, LPC_IO_MODE_PULL_UP, GPIO_DIR_IN, 0); + cc1101_init(0, &cc1101_cs_pin, &cc1101_miso_pin); /* ssp_num, cs_pin, miso_pin */ + /* Set default config */ + cc1101_config(); + /* And change application specific settings */ + cc1101_update_config(rf_specific_settings, sizeof(rf_specific_settings)); + set_gpio_callback(rf_rx_calback, &cc1101_gdo0, EDGE_RISING); + +#ifdef DEBUG + if (1) { + char buff[BUFF_LEN]; + int len = 0; + len = snprintf(buff, BUFF_LEN, "CC1101 RF link init done.\r\n"); + serial_write(0, buff, len); + } +#endif +} + +void handle_rf_rx_data(void) +{ + char buff[BUFF_LEN]; + int len = 0; + uint8_t data[RF_BUFF_LEN]; + int8_t ret = 0; + uint8_t status = 0; + + /* Check for received packet (and get it if any) */ + ret = cc1101_receive_packet(data, RF_BUFF_LEN, &status); + /* Go back to RX mode */ + cc1101_enter_rx_mode(); + +#ifdef DEBUG + if (1) { + len = snprintf(buff, BUFF_LEN, "RF: ret:%d, st: %d.\r\n", ret, status); + serial_write(0, buff, len); + } +#endif + + switch (data[2]) { + case 'T': + { + uint16_t val = 0; + int deci_degrees = 0; + /* Read the temperature */ + if (tmp101_sensor_read(&tmp101_sensor, &val, &deci_degrees) != 0) { + serial_write(0, "Temp read error\r\n", 19); + } else { + len = snprintf(buff, 40, "Temp read: %d,%d - raw: 0x%04x.\r\n", + (deci_degrees/10), (deci_degrees%10), val); + serial_write(0, buff, len); + } + } + break; + case 'V': + { + uint16_t val = 0; + /* Get and display the battery voltage */ + if (adc_get_value(&val, ADC_VBAT) >= 0) { + int milli_volts = ((val * 32) / 10); + len = snprintf(buff, 40, "Vbat: %d (raw: 0x%04x)\r\n", (milli_volts * 2), val); + serial_write(0 , buff, len); + } + } + break; + } +} + + +/* Data sent on radio comes from the UART, put any data received from UART in + * cc_tx_buff and send when either '\r' or '\n' is received. + * This function is very simple and data received between cc_tx flag set and + * cc_ptr rewind to 0 may be lost. */ +static volatile uint32_t cc_tx = 0; +static volatile uint8_t cc_tx_buff[RF_BUFF_LEN]; +static volatile uint8_t cc_ptr = 0; +void handle_uart_cmd(uint8_t c) +{ + if (cc_ptr < RF_BUFF_LEN) { + cc_tx_buff[cc_ptr++] = c; + } else { + cc_ptr = 0; + } + if ((c == '\n') || (c == '\r')) { + cc_tx = 1; + } +} + +void send_on_rf(void) +{ + uint8_t cc_tx_data[RF_BUFF_LEN + 2]; + uint8_t tx_len = cc_ptr; + int ret = 0; + + /* Create a local copy */ + memcpy((char*)&(cc_tx_data[2]), (char*)cc_tx_buff, tx_len); + /* "Free" the rx buffer as soon as possible */ + cc_ptr = 0; + /* Prepare buffer for sending */ + cc_tx_data[0] = tx_len + 1; + cc_tx_data[1] = 0; /* Broadcast */ + /* Send */ + if (cc1101_tx_fifo_state() != 0) { + cc1101_flush_tx_fifo(); + } + ret = cc1101_send_packet(cc_tx_data, (tx_len + 2)); + +#ifdef DEBUG + { + /* Give some feedback on UART 0 */ + char buff[BUFF_LEN]; + int len = 0; + len = snprintf(buff, BUFF_LEN, "Tx ret: %d\r\n", ret); + serial_write(0, buff, len); + } +#endif +} + + +/***************************************************************************** */ +int main(void) { + system_init(); + uart_on(0, 115200, handle_uart_cmd); + ssp_master_on(0, LPC_SSP_FRAME_SPI, 8, 4*1000*1000); /* bus_num, frame_type, data_width, rate */ + i2c_on(I2C_CLK_100KHz); + adc_on(); + status_led_config(&status_led_green, &status_led_red); + + /* Radio */ + rf_config(); + + /* Temperature sensor */ + temp_config(); + + while (1) { + uint8_t status = 0; + /* Request a Temp conversion on I2C TMP101 temperature sensor */ + tmp101_sensor_start_conversion(&tmp101_sensor); /* A conversion takes about 40ms */ + /* Start an ADC conversion to get battery voltage */ + adc_start_convertion_once(ADC_VBAT, 0); + + /* Tell we are alive :) */ + chenillard(250); + + /* RF */ + if (cc_tx == 1) { + send_on_rf(); + cc_tx = 0; + } + /* Do not leave radio in an unknown or unwated state */ + do { + status = (cc1101_read_status() & CC1101_STATE_MASK); + } while (status == CC1101_STATE_TX); + + if (status != CC1101_STATE_RX) { + static uint8_t loop = 0; + loop++; + if (loop > 10) { + if (cc1101_rx_fifo_state() != 0) { + cc1101_flush_rx_fifo(); + } + cc1101_enter_rx_mode(); + loop = 0; + } + } + if (check_rx == 1) { + check_rx = 0; + handle_rf_rx_data(); + } + } + return 0; +} + + + + -- 2.43.0