ESP_RETURN_ON_FALSE(GPIO_IS_VALID_GPIO(bus_config->sda_io_num) && GPIO_IS_VALID_GPIO(bus_config->scl_io_num), ESP_ERR_INVALID_ARG, TAG, "invalid SDA/SCL pin number");i2c_master = heap_caps_calloc(1, sizeof(i2c_master_bus_t) + 20 * sizeof(i2c_transaction_t), I2C_MEM_ALLOC...
2.解决: ①示波器查看波形,发现SDA和SCL波形一致,推测短路,重新焊接。 ②SDA波形正常,SCL始终高电平,推测初始化不完全,补增初始化程序。 //IIC初始化 void IIC_Init(void) { //GPIO_I2C_Init(); GPIO_Init(SDA_PORT, SDA_PIN,GPIO_DIR_OUTPUT,GPIO_PULL_NONE); GPIO_Init(SCL_PORT, SCL_PIN,GPIO_DIR...
(SDA, SCL) VIN_ LO VIN_ HI Input low threshold Input high threshold I2C I2C LOGIC OUTPUT OPEN DRAIN (SDA, CHRG_OK, CMPOUT) 0.4 V 1.3 V VOUT_ LO Output saturation voltage 5 mA drain current 0.4 V VOUT_ LEAK Leakage current LOGIC INPUT (OTG/VAP/FRS pin) Voltage = 7 V –1 1 ...
P1SEL |= SDA_PIN + SCL_PIN; // Assign I2C pins to USCI_B0 硬件I2C怎么知道那个管脚是 SDA 哪个是SCL， 我只是文字define #define SDA_PIN BIT7 // msp430x261x UCB0SDA pin #define SCL_PIN BIT4 而已，可是UCIBO怎么知道的？ 他怎么分配的管脚？我现在知道2553只能用p1.6 p1.7作 SCL和...
Document Number: 001-87275 Rev. ** Page 3 of 40 CY14C101I CY14B101I CY14E101I I2C インターフェイス I2C バスは,バス上の複数デバイス間で情報を運ぶシリアルク ロックライン (SCL) とシリアルデータ...
standard pinsare "only pre set" in arduino, you can use any GPIO pin for I2C ( SDA, SCL ) - you find this info under "Peripheral Pin Configurations" in theESP32-S2 Datasheet example esp32-s2_datasheet_en_I2C.png so a trick tip is, too, whats done in arduino sometime in thevari...
const PinMap PinMap_I2C_SDA[] = { {PB_11, I2C2, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_PULLUP, AFIO_NONE)}, {NC, NP, 0} }; const PinMap PinMap_I2C_SCL[] = { {PB_10, I2C2, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_PULLUP, AFIO_NONE)}, {NC, NP, 0} }; Author...
Section 7.17 of the board user manual documents the pin-out of this connector. There is one I2C bus available, through theI2C1_SDA(pin 27) andI2C1_SCL(pin 28) signals. Arduino connectors ConnectorsCN13,CN14,CN16,CN17are female connectors on the back side of the board. They are compati...
/* embeddedsw.dts.params.emptyfifo_hold_master type NUMBER */ status = "okay"; /* embeddedsw.dts.params.status type STRING */ clock-frequency = <100000>; i2c-sda-hold-time-ns = <100>; i2c-sda-falling-time-ns = <100>; i2c-scl-falling-time-ns = <300>; };...
DESCRIPTION 1 I I2C Interface Clock – Connect SCL to the logic rail through a 10-kΩ resistor. 2 IO I2C Interface Data – Connect SDA to the logic rail through a 10-kΩ resistor. 3 O Open Drain Interrupt Output – Connect the INT pin to a logic rail via 10-kΩ resistor. The ...