Difference between revisions of "RockpiE/hardware/gpio"

Revision as of 10:05, 20 November 2019

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    ROCK Pi E >  Hardware >  GPIO

General purpose input-output (GPIO) connector

ROCK Pi E has one 40-pin expansion header. Each pin is distinguished by color.

Hardware V10

26-pin Header

GPIO number	Func4	Func3	Func2	Func1	Pin#	Pin#	Func1	Func2	Func3	Func4	GPIO number
				+3.3V	1	2	+5.0V
68			I2C1_SDA	GPIO2_A4	3	4	+5.0V
69			I2C1_SCL	GPIO2_A5	5	6	GND
100	UART1_TX	SDMMC0EXT_D0	TSP_D0	GPIO3_A4	7	8	GPIO2_A0	UART2_TX_M1	POWERSTATE0		64
				GND	9	10	GPIO2_A1	UART2_RX_M1	POWERSTATE1		65
96	SPI_CLK_M2	SDMMC0EXT_CMD	TSP_VALID	GPIO3_A0	11	12	GPIO2_D2				90
104	SPI_CSN0_M2		TSP_D4	GPIO3_B0	13	14	GND
98	SPI_RXD_M2	SDMMC0EXT_CLK	TSP_CLK	GPIO3_A2	15	16	USB20DM
				+3.3V	17	18	USB20DP
27			SPDIF_TX_M0	GPIO0_D3	19	20	GND
83	CARD_CLK_M1	PDM_SDI0_M0	I2S1_SDI	GPIO2_C3	21	22	GPIO2_B4	SPI_CSN1_M0	FLASH_VOL_SEL		76
60			CLK32KOUT_M1	GPIO1_D4	23	24	GPIO2_A3	EFUSE_PWREN	POWERSTATE3		67
				GND	25	26	GPIO2_C7	I2S1_SDO	PDM_FSYNC_M0		87
97	SPI_TXD_M2	SDMMC0EXT_DET	TSP_FAIL	GPIO3_A1	27	28	GPIO2_C1	I2S1_LRCK_TX	SPDIF_TX_M1	TSP_D6_M1	81
80		TSP_D5_M1	I2S1_LRCK_RX	GPIO2_C0	29	30	GND
79		TSP_SYNC_M1	I2S1_MCLK	GPIO2_B7	31	32	GPIO3_A6	TSP_D2	SDMMC0EXT_D2	UART1_RX	102
82	TSP_D7_M1	PDM_CLK_M0	I2S1_SCLK	GPIO2_C2	33	34	GND
				ADC_IN1	35	36	GPIO2_C5	I2S1_SDIO2	PDM_SDI2_M0	CARD_DET_M1	85
66		POWERSTATE2	IR_RX	GPIO2_A2	39	38	GPIO2_C4	2S1_SDIO1	PDM_SDI1_M0	CARD_RST_M1	84
				GND	39	40	GPIO2_C6	I2S1_SDIO3	PDM_SDI3_M0	CARD_IO_M1	86

More details about 40-pin Header

Pin#12(GPIO2_D2) is also the sleep pin of PMIC RK805. Be careful when you try to control it.
Pins marked with color orange are designed for debug console.

IO Voltage

RK3328 have two IO voltages, 1.8V/3.3V. For ROCK Pi E, the voltage level of GPIOs showed in the tables above are 3.3V and tolerance of those are 3.6V.

GPIO number

Rockchip RK3328 GPIO has 4 banks, GPIO0 to GPIO3, each bank has 32pins, naming as below:

   GPIO0_A0 ~ A7 
   GPIO0_B0 ~ B7
   GPIO0_C0 ~ C7
   GPIO0_D0 ~ D7
   
   GPIO1_A0 ~ A7
   ....
   GPIO1_D0 ~ D7

For Rockchip 4.4 kernel, the GPIO number can be calculated as below, take GPIO2_A2(PIN39 on 40PIN GPIO) as an example:

   GPIO2_A2 = 32*2 + 8*0 + 2 = 66

To set GPIO2_A2 output

   cd /sys/class/gpio
   echo 66 > export
   cd gpio66
   echo out > direction
   echo 1 > value     # output high
   echo 0 > value     # output low

@@ Line 72: / Line 72: @@
 == IO Voltage ==
-RK3328 have two IO voltages, '''1.8V/3.3V'''.
+RK3328 have two IO voltages, '''1.8V/3.3V'''. For ROCK Pi E, the voltage level of GPIOs showed in the tables above are '''3.3V''' and tolerance of those  are '''3.6V'''.
 == GPIO number ==