109 lines
2.6 KiB
C
109 lines
2.6 KiB
C
/*
|
|
* This file is part of the libopencm3 project.
|
|
*
|
|
* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
|
|
* Copyright (C) 2012 Michael Ossmann <mike@ossmann.com>
|
|
*
|
|
* This library is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <libopencm3/lpc43xx/gpio.h>
|
|
#include <libopencm3/lpc43xx/i2c.h>
|
|
|
|
#include "../jellybean_conf.h"
|
|
|
|
static void gpio_setup(void)
|
|
{
|
|
/* Configure SCU Pin Mux as GPIO */
|
|
scu_pinmux(SCU_PINMUX_LED1, SCU_GPIO_FAST);
|
|
scu_pinmux(SCU_PINMUX_LED2, SCU_GPIO_FAST);
|
|
scu_pinmux(SCU_PINMUX_LED3, SCU_GPIO_FAST);
|
|
|
|
scu_pinmux(SCU_PINMUX_EN1V8, SCU_GPIO_FAST);
|
|
|
|
scu_pinmux(SCU_PINMUX_BOOT0, SCU_GPIO_FAST);
|
|
scu_pinmux(SCU_PINMUX_BOOT1, SCU_GPIO_FAST);
|
|
scu_pinmux(SCU_PINMUX_BOOT2, SCU_GPIO_FAST);
|
|
scu_pinmux(SCU_PINMUX_BOOT3, SCU_GPIO_FAST);
|
|
|
|
/* Configure all GPIO as Input (safe state) */
|
|
GPIO0_DIR = 0;
|
|
GPIO1_DIR = 0;
|
|
GPIO2_DIR = 0;
|
|
GPIO3_DIR = 0;
|
|
GPIO4_DIR = 0;
|
|
GPIO5_DIR = 0;
|
|
GPIO6_DIR = 0;
|
|
GPIO7_DIR = 0;
|
|
|
|
/* Configure GPIO as Output */
|
|
GPIO2_DIR |= (PIN_LED1|PIN_LED2|PIN_LED3); /* Configure GPIO2[1/2/8] (P4_1/2 P6_12) as output. */
|
|
GPIO3_DIR |= PIN_EN1V8; /* GPIO3[6] on P6_10 as output. */
|
|
}
|
|
|
|
#define SI5351C_I2C_ADDR (0x60 << 1)
|
|
|
|
/* write to single register */
|
|
/* Not used!
|
|
static void si5351c_write_reg(uint8_t reg, uint8_t val)
|
|
{
|
|
i2c0_tx_start();
|
|
i2c0_tx_byte(SI5351C_I2C_ADDR | I2C_WRITE);
|
|
i2c0_tx_byte(reg);
|
|
i2c0_tx_byte(val);
|
|
i2c0_stop();
|
|
}
|
|
*/
|
|
|
|
/* read single register */
|
|
static uint8_t si5351c_read_reg(uint8_t reg)
|
|
{
|
|
uint8_t val;
|
|
|
|
/* set register address with write */
|
|
i2c0_tx_start();
|
|
i2c0_tx_byte(SI5351C_I2C_ADDR | I2C_WRITE);
|
|
i2c0_tx_byte(reg);
|
|
|
|
/* read the value */
|
|
i2c0_tx_start();
|
|
i2c0_tx_byte(SI5351C_I2C_ADDR | I2C_READ);
|
|
val = i2c0_rx_byte();
|
|
i2c0_stop();
|
|
|
|
return val;
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
int i;
|
|
|
|
gpio_setup();
|
|
i2c0_init();
|
|
|
|
gpio_set(PORT_EN1V8, PIN_EN1V8); /* 1V8 on */
|
|
|
|
while (1) {
|
|
if (si5351c_read_reg(0) == 0x10)
|
|
gpio_set(GPIO2, GPIOPIN1); /* LED on */
|
|
else
|
|
gpio_clear(GPIO2, GPIOPIN1); /* LED off */
|
|
|
|
for (i = 0; i < 1000; i++) /* Wait a bit. */
|
|
__asm__("nop");
|
|
}
|
|
|
|
return 0;
|
|
}
|