void i2c2_hw_init(void) {
i2c2.reg_addr = (void *)I2C2;
i2c2.init_struct = NULL;
i2c2.errors = &i2c2_errors;
i2c2_watchdog_counter = 0;
/* zeros error counter */
ZEROS_ERR_COUNTER(i2c2_errors);
/* reset peripheral to default state ( sometimes not achieved on reset :( ) */
//i2c_reset(I2C2);
/* Configure priority grouping 0 bits for pre-emption priority and 4 bits for sub-priority. */
scb_set_priority_grouping(SCB_AIRCR_PRIGROUP_NOGROUP_SUB16);
/* Configure and enable I2C2 event interrupt --------------------------------*/
nvic_set_priority(NVIC_I2C2_EV_IRQ, 0);
nvic_enable_irq(NVIC_I2C2_EV_IRQ);
/* Configure and enable I2C2 err interrupt ----------------------------------*/
nvic_set_priority(NVIC_I2C2_ER_IRQ, 1);
nvic_enable_irq(NVIC_I2C2_ER_IRQ);
/* Enable peripheral clocks -------------------------------------------------*/
/* Enable I2C2 clock */
rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_I2C2EN);
/* Enable GPIO clock */
gpio_enable_clock(I2C2_GPIO_PORT);
#if defined(STM32F1)
gpio_set_mode(I2C2_GPIO_PORT, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN,
I2C2_GPIO_SCL | I2C2_GPIO_SDA);
#elif defined(STM32F4)
gpio_mode_setup(I2C2_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_NONE,
I2C2_GPIO_SCL | I2C2_GPIO_SDA);
gpio_set_output_options(I2C2_GPIO_PORT, GPIO_OTYPE_OD, GPIO_OSPEED_25MHZ,
I2C2_GPIO_SCL | I2C2_GPIO_SDA);
gpio_set_af(I2C2_GPIO_PORT, GPIO_AF4,
I2C2_GPIO_SCL | I2C2_GPIO_SDA);
#endif
i2c_reset(I2C2);
// enable peripheral
i2c_peripheral_enable(I2C2);
/*
* XXX: there is a function to do that already in libopencm3 but I am not
* sure if it is correct, using direct register instead (esden)
*/
//i2c_set_own_7bit_slave_address(I2C2, 0);
I2C_OAR1(I2C2) = 0 | 0x4000;
// enable error interrupts
I2C_CR2(I2C1) |= I2C_CR2_ITERREN;
i2c_setbitrate(&i2c2, I2C2_CLOCK_SPEED);
}
void event_i2c_abuse_test(void)
{
if (i2c_idle(&I2C_ABUSE_PORT))
{
LED_ON(5); // green = idle
LED_OFF(4);
}
else
{
LED_ON(4); // red = busy
LED_OFF(5);
}
// Wait for I2C transaction object to be released by the I2C driver before changing anything
if ((i2c_abuse_test_counter < 12) && (i2c_abuse_test_counter > 3))
{
if ((i2c_test2.status == I2CTransFailed) || (i2c_test2.status == I2CTransSuccess))
{
//i2c_test2.slave_addr = 0x90;
i2c_test2.type = I2CTransRx;
i2c_test2.slave_addr = 0x92;
i2c_test2.len_r = 2;
i2c_submit(&I2C_ABUSE_PORT,&i2c_test2);
}
}
if ((i2c_test1.status == I2CTransFailed) || (i2c_test1.status == I2CTransSuccess))
{
if (i2c_abuse_test_counter < 16)
{
i2c_abuse_test_counter++;
}
else
{
// wait until ready:
if (i2c_idle(&I2C_ABUSE_PORT))
{
i2c_abuse_test_counter = 1;
i2c_setbitrate(&I2C_ABUSE_PORT, i2c_abuse_test_bitrate);
i2c_abuse_test_bitrate += 17000;
if (i2c_abuse_test_bitrate > 410000)
{
i2c_abuse_test_bitrate -= 410000;
}
}
}
if (i2c_abuse_test_counter < 16)
{
RunOnceEvery(100,LED_TOGGLE(I2C_ABUSE_LED));
i2c_abuse_send_transaction( i2c_abuse_test_counter );
}
}
}
void i2c3_hw_init(void) {
i2c3.reg_addr = (void *)I2C3;
i2c3.init_struct = NULL;
i2c3.errors = &i2c3_errors;
i2c3_watchdog_counter = 0;
/* zeros error counter */
ZEROS_ERR_COUNTER(i2c3_errors);
/* reset peripheral to default state ( sometimes not achieved on reset :( ) */
//i2c_reset(I2C3);
/* Configure and enable I2C3 event interrupt --------------------------------*/
nvic_set_priority(NVIC_I2C3_EV_IRQ, NVIC_I2C3_IRQ_PRIO);
nvic_enable_irq(NVIC_I2C3_EV_IRQ);
/* Configure and enable I2C3 err interrupt ----------------------------------*/
nvic_set_priority(NVIC_I2C3_ER_IRQ, NVIC_I2C3_IRQ_PRIO+1);
nvic_enable_irq(NVIC_I2C3_ER_IRQ);
/* Enable peripheral clocks -------------------------------------------------*/
/* Enable I2C3 clock */
rcc_periph_clock_enable(RCC_I2C3);
/* Enable GPIO clock */
gpio_enable_clock(I2C3_GPIO_PORT_SCL);
gpio_mode_setup(I2C3_GPIO_PORT_SCL, GPIO_MODE_AF, GPIO_PUPD_NONE, I2C3_GPIO_SCL);
gpio_set_output_options(I2C3_GPIO_PORT_SCL, GPIO_OTYPE_OD, GPIO_OSPEED_25MHZ,
I2C3_GPIO_SCL);
gpio_set_af(I2C3_GPIO_PORT_SCL, GPIO_AF4, I2C3_GPIO_SCL);
gpio_enable_clock(I2C3_GPIO_PORT_SDA);
gpio_mode_setup(I2C3_GPIO_PORT_SDA, GPIO_MODE_AF, GPIO_PUPD_NONE, I2C3_GPIO_SDA);
gpio_set_output_options(I2C3_GPIO_PORT_SDA, GPIO_OTYPE_OD, GPIO_OSPEED_25MHZ,
I2C3_GPIO_SDA);
gpio_set_af(I2C3_GPIO_PORT_SDA, GPIO_AF4, I2C3_GPIO_SDA);
i2c_reset(I2C3);
// enable peripheral
i2c_peripheral_enable(I2C3);
/*
* XXX: there is a function to do that already in libopencm3 but I am not
* sure if it is correct, using direct register instead (esden)
*/
//i2c_set_own_7bit_slave_address(I2C3, 0);
I2C_OAR1(I2C3) = 0 | 0x4000;
// enable error interrupts
I2C_CR2(I2C1) |= I2C_CR2_ITERREN;
i2c_setbitrate(&i2c3, I2C3_CLOCK_SPEED);
}
void i2c1_hw_init(void) {
i2c1.reg_addr = (void *)I2C1;
i2c1.init_struct = NULL;
i2c1.errors = &i2c1_errors;
i2c1.watchdog = -1;
/* zeros error counter */
ZEROS_ERR_COUNTER(i2c1_errors);
// Extra
#ifdef I2C_DEBUG_LED
LED_INIT();
#else
/* reset peripheral to default state ( sometimes not achieved on reset :( ) */
//rcc_periph_reset_pulse(RST_I2C1);
/* Configure and enable I2C1 event interrupt --------------------------------*/
nvic_set_priority(NVIC_I2C1_EV_IRQ, NVIC_I2C1_IRQ_PRIO);
nvic_enable_irq(NVIC_I2C1_EV_IRQ);
/* Configure and enable I2C1 err interrupt ----------------------------------*/
nvic_set_priority(NVIC_I2C1_ER_IRQ, NVIC_I2C1_IRQ_PRIO+1);
nvic_enable_irq(NVIC_I2C1_ER_IRQ);
/* Enable peripheral clocks -------------------------------------------------*/
/* Enable I2C1 clock */
rcc_periph_clock_enable(RCC_I2C1);
/* setup gpio clock and pins */
i2c_setup_gpio(I2C1);
rcc_periph_reset_pulse(RST_I2C1);
// enable peripheral
i2c_peripheral_enable(I2C1);
/*
* XXX: there is a function to do that already in libopencm3 but I am not
* sure if it is correct, using direct register instead (esden)
*/
//i2c_set_own_7bit_slave_address(I2C1, 0);
I2C_OAR1(I2C1) = 0 | 0x4000;
// enable error interrupts
i2c_enable_interrupt(I2C1, I2C_CR2_ITERREN);
i2c_setbitrate(&i2c1, I2C1_CLOCK_SPEED);
#endif
}
void i2c1_hw_init(void) {
i2c1.reg_addr = (void *)I2C1;
i2c1.init_struct = NULL;
i2c1.errors = &i2c1_errors;
i2c1_watchdog_counter = 0;
/* zeros error counter */
ZEROS_ERR_COUNTER(i2c1_errors);
// Extra
#ifdef I2C_DEBUG_LED
LED_INIT();
#else
/* reset peripheral to default state ( sometimes not achieved on reset :( ) */
//i2c_reset(I2C1);
/* Configure and enable I2C1 event interrupt --------------------------------*/
nvic_set_priority(NVIC_I2C1_EV_IRQ, NVIC_I2C1_IRQ_PRIO);
nvic_enable_irq(NVIC_I2C1_EV_IRQ);
/* Configure and enable I2C1 err interrupt ----------------------------------*/
nvic_set_priority(NVIC_I2C1_ER_IRQ, NVIC_I2C1_IRQ_PRIO+1);
nvic_enable_irq(NVIC_I2C1_ER_IRQ);
/* Enable peripheral clocks -------------------------------------------------*/
/* Enable I2C1 clock */
rcc_periph_clock_enable(RCC_I2C1);
/* Enable GPIO clock */
gpio_enable_clock(I2C1_GPIO_PORT);
#if defined(STM32F1)
gpio_set_mode(I2C1_GPIO_PORT, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN,
I2C1_GPIO_SCL | I2C1_GPIO_SDA);
#elif defined(STM32F4)
gpio_mode_setup(I2C1_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_NONE,
I2C1_GPIO_SCL | I2C1_GPIO_SDA);
gpio_set_output_options(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_25MHZ,
I2C1_GPIO_SCL | I2C1_GPIO_SDA);
gpio_set_af(I2C1_GPIO_PORT, GPIO_AF4, I2C1_GPIO_SCL | I2C1_GPIO_SDA);
#endif
i2c_reset(I2C1);
// enable peripheral
i2c_peripheral_enable(I2C1);
/*
* XXX: there is a function to do that already in libopencm3 but I am not
* sure if it is correct, using direct register instead (esden)
*/
//i2c_set_own_7bit_slave_address(I2C1, 0);
I2C_OAR1(I2C1) = 0 | 0x4000;
// enable error interrupts
I2C_CR2(I2C1) |= I2C_CR2_ITERREN;
i2c_setbitrate(&i2c1, I2C1_CLOCK_SPEED);
#endif
}
