int main(void)
{
clock_setup();
usart_clock_setup();
gpio_setup();
usart_setup();
printf("\r\nstarting i2c scan.\r\n");
int i, j;
for (i = 1; i < 0x80; i++) {
i2c_init();
msleep(50);
for (j = 0; j < 0x100; j++) {
int data; // = 0;
data = i2c_read(I2C3, i, j);
if (data > -1) {
if (data) {
printf("device on address 0x%02X : reg = 0x%02X with data == 0x%02X\r\n", i, j, data);
}
} else {
printf("errerr!!\r\n");
break;
}
//i2c_send_stop(I2C3);
}
i2c_deinit();
msleep(50);
}
printf("scan ended!\r\n");
return 0;
}
int fc8100_i2c_deinit(HANDLE hDevice)
{
int res = BBM_NOK;
res = i2c_deinit(hDevice);
return res;
}
//----------------------------------------------------------------------------------
// Close Humidity Sensor driver
int CloseHMSdrv(void)
//----------------------------------------------------------------------------------
{
ets_timer_disarm(&test_timer);
int ret = i2c_deinit();
hms_errflg = -1; // драйвер не инициализирован
hms_init_flg = 0;
return ret;
}
STATIC void i2c_reset_after_error(I2C_HandleTypeDef *i2c) {
// wait for bus-busy flag to be cleared, with a timeout
for (int timeout = 50; timeout > 0; --timeout) {
if (!__HAL_I2C_GET_FLAG(i2c, I2C_FLAG_BUSY)) {
// stop bit was generated and bus is back to normal
return;
}
mp_hal_delay_ms(1);
}
// bus was/is busy, need to reset the peripheral to get it to work again
i2c_deinit(i2c);
i2c_init(i2c);
}
void i2c_init_freq(const pyb_i2c_obj_t *self, mp_int_t freq) {
I2C_InitTypeDef *init = &self->i2c->Init;
init->AddressingMode = I2C_ADDRESSINGMODE_7BIT;
init->DualAddressMode = I2C_DUALADDRESS_DISABLED;
init->GeneralCallMode = I2C_GENERALCALL_DISABLED;
init->NoStretchMode = I2C_NOSTRETCH_DISABLE;
init->OwnAddress1 = PYB_I2C_MASTER_ADDRESS;
init->OwnAddress2 = 0; // unused
if (freq != -1) {
i2c_set_baudrate(init, MIN(freq, MICROPY_HW_I2C_BAUDRATE_MAX));
}
*self->use_dma = false;
// init the I2C bus
i2c_deinit(self->i2c);
i2c_init(self->i2c);
}
int main(void) {
board_init();
board_console_init(BOARD_DEBUG_BAUD);
SysTick_Config(BOARD_SYSTICK_100MS);
while (true) {
i2c_init(&i2c_config);
for (uint8_t address = 0x01; address <= 0x7f; address++) {
PRINTF("Scanning for device 0x%02x: \e[K", address);
status_t status = i2c_ping(address);
switch (status) {
case kStatus_Success:
PRINTF("FOUND\r\n");
break;
case kStatus_I2C_Nak:
PRINTF("NOT FOUND\r");
break;
case kStatus_I2C_ArbitrationLost:
PRINTF("ARBITRATION LOST\r\n");
break;
case kStatus_I2C_Busy:
PRINTF("BUSY\r\n");
break;
case kStatus_I2C_Idle:
PRINTF("IDLE\r\n");
break;
case kStatus_I2C_Timeout:
PRINTF("TIMEOUT\r\n");
break;
default:
PRINTF("ERROR %0d\r", status);
break;
}
delay(100);
}
i2c_deinit();
}
}
/**
* @brief Reset an I2C bus.
*
* Reset is accomplished by clocking out pulses until any hung slaves
* release SDA and SCL, then generating a START condition, then a STOP
* condition.
*
* @param dev I2C device
*/
void i2c_bus_reset(i2c_dev *dev) {
//unsigned clock_count;
//unsigned stretch_count;
i2c_deinit(dev);
/* Release both lines */
i2c_master_release_bus(dev);
/*
* Make sure the bus is free by clocking it until any slaves release the
* bus.
*/
while (!gpio_read_bit(dev->gpio_port, dev->sda_pin)) {
/* Wait for any clock stretching to finish */
while (!gpio_read_bit(dev->gpio_port, dev->scl_pin))
;
delay_us(10);
/* Pull low */
gpio_write_bit(dev->gpio_port, dev->scl_pin, 0);
delay_us(10);
/* Release high again */
gpio_write_bit(dev->gpio_port, dev->scl_pin, 1);
delay_us(10);
}
/* Generate start then stop condition */
gpio_write_bit(dev->gpio_port, dev->sda_pin, 0);
delay_us(10);
gpio_write_bit(dev->gpio_port, dev->scl_pin, 0);
delay_us(10);
gpio_write_bit(dev->gpio_port, dev->scl_pin, 1);
delay_us(10);
gpio_write_bit(dev->gpio_port, dev->sda_pin, 1);
i2c_init(dev, 0, I2C_400KHz_SPEED);
}
int main(int argc, char **argv)
{
int i, address, cmdbuf;
int num_bytes = 1;
unsigned int ret;
char *conv_err;
i2c_getopt(argc, argv);
if (argc < 3) {
fputs("Usage: vusb-i2cget <address> <num_bytes> [register ...] ", stderr);
return 1;
}
address = strtol(argv[1], &conv_err, 0);
if (conv_err && *conv_err) {
fprintf(stderr, "address: Conversion error at '%s'\n", conv_err);
return 2;
}
num_bytes = strtol(argv[2], &conv_err, 0);
if (conv_err && *conv_err) {
fprintf(stderr, "num_bytes: Conversion error at '%s'\n", conv_err);
return 2;
}
i2c_init();
if (argc >= 3) {
i2c_hw_start();
if (!i2c_hw_tx_byte((address << 1) | 0)) {
fprintf(stderr, "Received NAK from slave 0x%02x, aborting\n", address);
i2c_hw_stop();
i2c_deinit();
return 3;
}
}
for (i = 3; i < argc; i++) {
cmdbuf = strtol(argv[i], &conv_err, 0);
if (conv_err && *conv_err) {
fprintf(stderr, "read command: Conversion error at '%s'\n", conv_err);
i2c_hw_stop();
i2c_deinit();
return 2;
}
if (!i2c_hw_tx_byte(cmdbuf)) {
fprintf(stderr, "Received NAK after byte %d (0x%02x)\n", i-1, cmdbuf);
i2c_hw_stop();
i2c_deinit();
return 4;
}
}
i2c_hw_start();
if (!i2c_hw_tx_byte((address << 1) | 1)) {
fprintf(stderr, "Received NAK after reSTART from slave 0x%02x, aborting\n", address);
i2c_hw_stop();
i2c_deinit();
return 3;
}
for (i = 1; i <= num_bytes; i++) {
printf("%i ", i2c_hw_rx_byte((i < num_bytes) * 1));
}
putc('\n', stdout);
i2c_hw_stop();
i2c_deinit();
return 0;
}
/// \method deinit()
/// Turn off the I2C bus.
STATIC mp_obj_t pyb_i2c_deinit(mp_obj_t self_in) {
pyb_i2c_obj_t *self = self_in;
i2c_deinit(self->i2c);
return mp_const_none;
}