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/*
* 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 = GPIO6 | GPIO9, /* FIXME - only for onboard! */
.pins = GPIO8 | GPIO9, /* For SHT21 on I2c1 */
.port = GPIOB,
.port_rcc = RCC_GPIOB,
};
static void setup_i2c_gpio(void)
{
/* reset pin */
// rcc_periph_clock_enable(RCC_GPIOD);
// gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO4);
/* 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 codec_init(void)
{
int i;
/* Configure the Codec related IOs */
setup_i2c_gpio();
/* reset the codec */
// gpio_clear(GPIOD, GPIO4);
for (i = 0; i < 1000000; i++) { /* Wait a bit. */
__asm__("NOP");
}
// gpio_set(GPIOD, GPIO4);
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);
printf("hi guys!\n");
codec_init();
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;
}
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