diff options
Diffstat (limited to 'bsp/at91sam9260/drivers/at91_i2c_gpio.c')
| -rw-r--r-- | bsp/at91sam9260/drivers/at91_i2c_gpio.c | 124 |
1 files changed, 62 insertions, 62 deletions
diff --git a/bsp/at91sam9260/drivers/at91_i2c_gpio.c b/bsp/at91sam9260/drivers/at91_i2c_gpio.c index fb4c0ccfaf..d863ffed88 100644 --- a/bsp/at91sam9260/drivers/at91_i2c_gpio.c +++ b/bsp/at91sam9260/drivers/at91_i2c_gpio.c @@ -4,8 +4,8 @@ * SPDX-License-Identifier: Apache-2.0 * * Change Logs: - * Date Author Notes - * 2012-04-25 weety first version + * Date Author Notes + * 2012-04-25 weety first version */ #include <rtdevice.h> @@ -15,101 +15,101 @@ static void at91_i2c_gpio_init() { - at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_PIOA); //enable PIOA clock - at91_sys_write(AT91_PIOA + PIO_PUER, (1 << 23)); - at91_sys_write(AT91_PIOA + PIO_PER, (1 << 23)); - at91_sys_write(AT91_PIOA + PIO_MDER, (1 << 23)); - at91_sys_write(AT91_PIOA + PIO_PUER, (1 << 24)); - at91_sys_write(AT91_PIOA + PIO_PER, (1 << 24)); - at91_sys_write(AT91_PIOA + PIO_MDER, (1 << 24)); + at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_PIOA); //enable PIOA clock + at91_sys_write(AT91_PIOA + PIO_PUER, (1 << 23)); + at91_sys_write(AT91_PIOA + PIO_PER, (1 << 23)); + at91_sys_write(AT91_PIOA + PIO_MDER, (1 << 23)); + at91_sys_write(AT91_PIOA + PIO_PUER, (1 << 24)); + at91_sys_write(AT91_PIOA + PIO_PER, (1 << 24)); + at91_sys_write(AT91_PIOA + PIO_MDER, (1 << 24)); - at91_sys_write(AT91_PIOA + PIO_OER, (1 << 23)); - at91_sys_write(AT91_PIOA + PIO_OER, (1 << 24)); + at91_sys_write(AT91_PIOA + PIO_OER, (1 << 23)); + at91_sys_write(AT91_PIOA + PIO_OER, (1 << 24)); - at91_sys_write(AT91_PIOA + PIO_SODR, (1 << 23)); - at91_sys_write(AT91_PIOA + PIO_SODR, (1 << 24)); + at91_sys_write(AT91_PIOA + PIO_SODR, (1 << 23)); + at91_sys_write(AT91_PIOA + PIO_SODR, (1 << 24)); } static void at91_set_sda(void *data, rt_int32_t state) { - if (state) - { - at91_sys_write(AT91_PIOA + PIO_SODR, (1 << 23)); - } - else - { - at91_sys_write(AT91_PIOA + PIO_CODR, (1 << 23)); - } + if (state) + { + at91_sys_write(AT91_PIOA + PIO_SODR, (1 << 23)); + } + else + { + at91_sys_write(AT91_PIOA + PIO_CODR, (1 << 23)); + } } static void at91_set_scl(void *data, rt_int32_t state) { - if (state) - { - at91_sys_write(AT91_PIOA + PIO_SODR, (1 << 24)); - } - else - { - at91_sys_write(AT91_PIOA + PIO_CODR, (1 << 24)); - } + if (state) + { + at91_sys_write(AT91_PIOA + PIO_SODR, (1 << 24)); + } + else + { + at91_sys_write(AT91_PIOA + PIO_CODR, (1 << 24)); + } } static rt_int32_t at91_get_sda(void *data) { - return at91_sys_read(AT91_PIOA + PIO_PDSR) & (1 << 23); + return at91_sys_read(AT91_PIOA + PIO_PDSR) & (1 << 23); } static rt_int32_t at91_get_scl(void *data) { - return at91_sys_read(AT91_PIOA + PIO_PDSR) & (1 << 24); + return at91_sys_read(AT91_PIOA + PIO_PDSR) & (1 << 24); } static void at91_udelay (rt_uint32_t us) { - rt_int32_t i; - for (; us > 0; us--) - { - i = 50000; - while(i > 0) - { - i--; - } - } + rt_int32_t i; + for (; us > 0; us--) + { + i = 50000; + while(i > 0) + { + i--; + } + } } static const struct rt_i2c_bit_ops bit_ops = { - RT_NULL, - at91_set_sda, - at91_set_scl, - at91_get_sda, - at91_get_scl, - - at91_udelay, + RT_NULL, + at91_set_sda, + at91_set_scl, + at91_get_sda, + at91_get_scl, - 5, - 100 + at91_udelay, + + 5, + 100 }; int at91_i2c_init(void) { - struct rt_i2c_bus_device *bus; + struct rt_i2c_bus_device *bus; + + bus = rt_malloc(sizeof(struct rt_i2c_bus_device)); + if (bus == RT_NULL) + { + rt_kprintf("rt_malloc failed\n"); + return -RT_ENOMEM; + } - bus = rt_malloc(sizeof(struct rt_i2c_bus_device)); - if (bus == RT_NULL) - { - rt_kprintf("rt_malloc failed\n"); - return -RT_ENOMEM; - } - - rt_memset((void *)bus, 0, sizeof(struct rt_i2c_bus_device)); + rt_memset((void *)bus, 0, sizeof(struct rt_i2c_bus_device)); - bus->priv = (void *)&bit_ops; + bus->priv = (void *)&bit_ops; - at91_i2c_gpio_init(); + at91_i2c_gpio_init(); - rt_i2c_bit_add_bus(bus, "i2c0"); + rt_i2c_bit_add_bus(bus, "i2c0"); - return 0; + return 0; } INIT_DEVICE_EXPORT(at91_i2c_init); |