From bcce98da54b047a15ef0abf41e0c7794f29f0439 Mon Sep 17 00:00:00 2001 From: Uwe Hermann Date: Thu, 30 Dec 2010 01:52:44 +0100 Subject: Move STM32 examples to examples/stm32 subdir. --- .../other/i2c_stts75_sensor/i2c_stts75_sensor.c | 146 --------------------- 1 file changed, 146 deletions(-) delete mode 100644 examples/other/i2c_stts75_sensor/i2c_stts75_sensor.c (limited to 'examples/other/i2c_stts75_sensor/i2c_stts75_sensor.c') diff --git a/examples/other/i2c_stts75_sensor/i2c_stts75_sensor.c b/examples/other/i2c_stts75_sensor/i2c_stts75_sensor.c deleted file mode 100644 index 1227fd1..0000000 --- a/examples/other/i2c_stts75_sensor/i2c_stts75_sensor.c +++ /dev/null @@ -1,146 +0,0 @@ -/* - * This file is part of the libopenstm32 project. - * - * Copyright (C) 2010 Thomas Otto - * - * 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 3 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 -#include -#include -#include -#include "stts75.h" - -void usart_setup(void) -{ - /* Enable clocks for GPIO port A (for GPIO_USART1_TX) and USART1. */ - rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN); - rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_USART1EN); - - /* Setup GPIO pin GPIO_USART1_TX/GPIO9 on GPIO port A for transmit. */ - gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ, - GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_TX); - - /* Setup UART parameters. */ - usart_set_baudrate(USART1, 115200); - usart_set_databits(USART1, 8); - usart_set_stopbits(USART1, USART_STOPBITS_1); - usart_set_mode(USART1, USART_MODE_TX_RX); - usart_set_parity(USART1, USART_PARITY_NONE); - usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE); - - /* Finally enable the USART. */ - usart_enable(USART1); -} - -void gpio_setup(void) -{ - /* Enable GPIOB clock. */ - rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN); - - /* Set GPIO6/7 (in GPIO port B) to 'output push-pull' for the LEDs. */ - gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, - GPIO_CNF_OUTPUT_PUSHPULL, GPIO6); - gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, - GPIO_CNF_OUTPUT_PUSHPULL, GPIO7); -} - -void i2c_setup(void) -{ - /* Enable clocks for I2C2 and AFIO. */ - rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_I2C2EN); - rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_AFIOEN); - - /* Set alternate functions for the SCL and SDA pins of I2C2. */ - gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ, - GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN, - GPIO_I2C2_SCL | GPIO_I2C2_SDA); - - /* Disable the I2C before changing any configuration. */ - i2c_peripheral_disable(I2C2); - - /* APB1 is running at 36MHz. */ - i2c_set_clock_frequency(I2C2, I2C_CR2_FREQ_36MHZ); - - /* 400KHz - I2C Fast Mode */ - i2c_set_fast_mode(I2C2); - - /* - * fclock for I2C is 36MHz APB2 -> cycle time 28ns, low time at 400KHz - * incl trise -> Thigh= 1600ns; CCR= tlow/tcycle= 0x1C,9; - * datasheet suggests 0x1e. - */ - i2c_set_ccr(I2C2, 0x1e); - - /* - * fclock for I2C is 36MHz -> cycle time 28ns, rise time for - * 400KHz => 300ns and 100KHz => 1000ns; 300ns/28ns = 10; - * incremented by 1 -> 11. - */ - i2c_set_trise(I2C2, 0x0b); - - /* - * This is our slave address - needed only if we want to receive from - * other masters. - */ - i2c_set_own_7bit_slave_address(I2C2, 0x32); - - /* If everything is configured -> enable the peripheral. */ - i2c_peripheral_enable(I2C2); -} - -int main(void) -{ - int i = 0; - u16 temperature; - - rcc_clock_setup_in_hse_16mhz_out_72mhz(); - gpio_setup(); - usart_setup(); - i2c_setup(); - - gpio_clear(GPIOB, GPIO7); /* LED1 on */ - gpio_set(GPIOB, GPIO6); /* LED2 off */ - - /* Send a message on USART1. */ - usart_send(USART1, 's'); - usart_send(USART1, 't'); - usart_send(USART1, 'm'); - usart_send(USART1, '\r'); - usart_send(USART1, '\n'); - - stts75_write_config(I2C2, STTS75_SENSOR0); - stts75_write_temp_os(I2C2, STTS75_SENSOR0, 0x1a00); /* 26 degrees */ - stts75_write_temp_hyst(I2C2, STTS75_SENSOR0, 0x1a00); - temperature = stts75_read_temperature(I2C2, STTS75_SENSOR0); - - /* Send the temperature as binary over USART1. */ - for (i = 15; i >= 0 ; i--) { - if (temperature & (1 << i)) - usart_send(USART1, '1'); - else - usart_send(USART1, '0'); - } - - usart_send(USART1, '\r'); - usart_send(USART1, '\n'); - - gpio_clear(GPIOB, GPIO6); /* LED2 on */ - - while(1); /* Halt. */ - - return 0; -} -- cgit v1.2.3