79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/*
|
|
* Feb 2017 Karl Palsson <karlp@tweak.net.au>
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <libopencm3/cm3/nvic.h>
|
|
#include <libopencm3/stm32/gpio.h>
|
|
#include <libopencm3/stm32/i2c.h>
|
|
#include <libopencm3/stm32/rcc.h>
|
|
|
|
#include "trace.h"
|
|
|
|
#include "hw.h"
|
|
#include "i2c-master.h"
|
|
|
|
#define LED_DISCO_GREEN_PORT GPIOD
|
|
#define LED_DISCO_GREEN_PIN GPIO12
|
|
|
|
|
|
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 = GPIO13,
|
|
};
|
|
|
|
|
|
/* provided in board files please*/
|
|
/**
|
|
* 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_50MHZ, hw_details.pins);
|
|
gpio_set_af(hw_details.port, GPIO_AF4, hw_details.pins);
|
|
}
|
|
|
|
static void setup(void)
|
|
{
|
|
printf("hi guys!\n");
|
|
i2cm_hw_init();
|
|
i2cm_init();
|
|
}
|
|
|
|
|
|
int main(void)
|
|
{
|
|
int i, j;
|
|
rcc_clock_setup_hse_3v3(&rcc_hse_8mhz_3v3[RCC_CLOCK_3V3_168MHZ]);
|
|
/* green led for ticking */
|
|
rcc_periph_clock_enable(RCC_GPIOD);
|
|
gpio_mode_setup(LED_DISCO_GREEN_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
|
|
LED_DISCO_GREEN_PIN);
|
|
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");
|
|
}
|
|
}
|
|
return 0;
|
|
}
|