diff options
Diffstat (limited to 'tests/i2c-master/main-stm32f072-disco.c')
| -rw-r--r-- | tests/i2c-master/main-stm32f072-disco.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/tests/i2c-master/main-stm32f072-disco.c b/tests/i2c-master/main-stm32f072-disco.c new file mode 100644 index 0000000..8818665 --- /dev/null +++ b/tests/i2c-master/main-stm32f072-disco.c @@ -0,0 +1,101 @@ +/* + * Copyright (C) 2017 Karl Palsson <karlp@tweak.net.au> + */ + +#include <libopencm3/cm3/nvic.h> +#include <libopencm3/stm32/crs.h> +#include <libopencm3/stm32/gpio.h> +#include <libopencm3/stm32/i2c.h> +#include <libopencm3/stm32/rcc.h> +#include <libopencm3/stm32/usart.h> + +#include <stdio.h> +#include "hw.h" +#include "i2c-master.h" + +#define LED_DISCO_GREEN_PORT GPIOC +#define LED_DISCO_GREEN_PIN GPIO9 + + + +struct hw_detail hw_details = { + .periph = I2C1, + .periph_rcc = RCC_I2C1, + .periph_rst = RST_I2C1, + .pins = GPIO8 | GPIO9, /* our external i2c device on I2c1 */ + .port = GPIOB, + .port_rcc = RCC_GPIOB, + .trigger_rcc = RCC_GPIOB, + .trigger_port = GPIOB, + .trigger_pin = GPIO12, + .i2c_clock_megahz = 48, // FIXME +}; + + +static +void setup_usart(void) +{ + uint32_t dev = USART1; + rcc_periph_clock_enable(RCC_USART1); + rcc_periph_clock_enable(RCC_GPIOA); + gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO9); + gpio_set_af(GPIOA, GPIO_AF1, GPIO9); + + usart_set_baudrate(dev, 115200); + usart_set_databits(dev, 8); + usart_set_parity(dev, USART_PARITY_NONE); + usart_set_stopbits(dev, USART_CR2_STOP_1_0BIT); + usart_set_mode(dev, USART_MODE_TX); + usart_set_flow_control(dev, USART_FLOWCONTROL_NONE); + + /* Finally enable the USART. */ + usart_enable(dev); +} + +/** + * Setup any gpios or anything hardware specific. + * Should _only_ be things that can't be done in shared i2cm_init! + */ +static void i2cm_hw_init(void) +{ + /* trigger pin gpio */ + rcc_periph_clock_enable(hw_details.trigger_rcc); + gpio_mode_setup(hw_details.trigger_port, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, hw_details.trigger_pin); + + /* i2c control lines */ + rcc_periph_clock_enable(hw_details.port_rcc); + gpio_mode_setup(hw_details.port, GPIO_MODE_AF, GPIO_PUPD_NONE, hw_details.pins); + gpio_set_output_options(hw_details.port, GPIO_OTYPE_OD, GPIO_OSPEED_HIGH, hw_details.pins); + gpio_set_af(hw_details.port, GPIO_AF1, hw_details.pins); +} + + +static void setup(void) +{ + setup_usart(); + printf("hi guys!\n"); + i2cm_hw_init(); + i2cm_init(); +} + +int main(void) +{ + int i; + rcc_clock_setup_in_hsi48_out_48mhz(); + /* green led for ticking */ + rcc_periph_clock_enable(RCC_GPIOC); + gpio_mode_setup(LED_DISCO_GREEN_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, LED_DISCO_GREEN_PORT); + gpio_set(LED_DISCO_GREEN_PORT, LED_DISCO_GREEN_PORT); + + setup(); + + while (1) { + i2cm_task(); + gpio_toggle(LED_DISCO_GREEN_PORT, LED_DISCO_GREEN_PIN); + for (i = 0; i < 0x800000; i++) { /* Wait a bit. */ + __asm__("NOP"); + } + } + +} + |