Difference between revisions of "Rock3/CM3/raspcm4io/gpio"

Latest revision as of 07:30, 30 March 2022

    ROCK 3 >  Compute Module 3 >   Raspberry Pi CM4 IO Board >   GPIO

GPIO number	Function4	Function3	Function2	Function1	Pin#	Pin#	Function1	Function2	Function3	GPIO number
				+3.3V	1	2	+5.0V
14	SPI0_MOSI_M0	I2C2_SDA_M0	PWM2_M1	GPIO0_B6	3	4	+5.0V
13	SPI0_CLK_M0	I2C2_SCL_M0	PWM1_M1	GPIO0_B5	5	6	GND
125		I2S1_SDI3_M1	SDMMC2_PWREN_M0	GPIO3_D5	7	8	GPIO0_D1	UART2_TX_M0		25
				GND	9	10	GPIO0_D0	UART2_RX_M0		24
23		UART0_CTSn	PWM0_M1	GPIO0_C7	11	12	GPIO3_C7	I2S1_SCLK_TX_M1		119
15			PWM0_M0	GPIO0_B7	13	14	GND
19		PWM4	VOP_PWM_M0	GPIO0_C3	15	16	GPIO3_D4	I2S1_SDI2_M1		124
				+3.3V	17	18	GPIO3_D3	I2S1_SDI1_M1		123
138	I2S2_SDI_M1	SPI3_MOSI_M0	I2C4_SDA_M0	GPIO4_B2	19	20	GND
136		SPI3_MISO_M0	I2S1_SDO1_M1	GPIO4_B0	21	22	GPIO3_C6	I2S1_MCLK_M1		118
139	I2S2_SDO_M1	SPI3_CLK_M0	I2C4_SCL_M0	GPIO4_B3	23	24	GPIO4_A6	I2S1_SCLK_RX_M1	SPI3_CS0_M0	134
				GND	25	26	SARADC_IN3
140			I2C2_SDA_M1	GPIO4_B4	27	28	GPIO4_B5	I2S1_SDO3_M1	I2C2_SCL_M1	141
137		I2S1_SDO2_M1	ISP_PRELIGHT_TRIG	GPIO4_B1	29	30	GND
21		SPI0_MISO_M0	PWM6	GPIO0_C5	31	32	GPIO4_C0	PWM11_IR_M1		144
22		SPI0_CS0_M0	PWM7_IR	GPIO0_C6	33	34	GND
120			I2S1_LRCK_TX_M1	GPIO3_D0	35	36	GPIO4_A7	I2S1_LRCK_RX_M1	SPI3_CS1_M0	135
18			PWM3_IR	GPIO0_C2	37	38	GPIO3_D2	I2S1_SDI0_M1		122
				GND	39	40	GPIO3_D1	I2S1_SDO0_M1		121

RK3566 have three IO voltages, 1.8V/3.3V. For CM4 IO, the high level voltage of GPIO pin on 40-PIN HEADER is 3.3V.

| GPIO       | Voltage Level | Tolerance |
| ---------- | ------------- | --------- |
| SARADC_IN3    | 1.8V          | 1.98V     |

Rockchip RK3566 GPIO has 5 banks, GPIO0 to GPIO4, 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

The GPIO number can be calculated as below, take GPIO4_C0 (PIN32 on 4-0PIN HEADER) as an example:

GPIO4_C0 = 4*32 + 2*8 + 0 = 144
(A=0, B=1, C=2, D=3)

To set GPIO4_C0 output

cd /sys/class/gpio
echo 144 > export
cd 144
echo out > direction
echo 1 > value     # output high
echo 0 > value     # output low

@@ Line 311: / Line 311: @@
 * SPI:X2,SPI0/SPI3
 * I2C:X2,I2C2/I2C4
-* UART:X2,UART0/UART2
+* UART:X1, UART2
 * ADC:X1, SARADC_IN3
 * I2S:X2, I2S1/I2S2