[GD32L233C-START Review] 6. SPI (Hardware SPI Drive OLED)

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[GD32L233C-START Review] 6. SPI (Hardware SPI Drive OLED) [Copy link]

 

Happy New Year and good luck in the new year!

This experiment uses the SPI communication interface of GD32L233CCT6 to drive a 1.3' OLED display.
1. Experimental resources
1. GD32L233C-START;
2. Keil V5.36.0.0;
3. 1.3' OLED module (self-made)

2. Knowledge Preparation

GD32L233CCT6 has two SPI communication interfaces (SPI0 and SPI1). The SPI interface supports full-duplex and simplex modes with hardware CRC calculation and verification, and can work in master or slave mode. Only SPI0 supports SPI four-wire master mode.

In SPI applications, attention should be paid to the clock signal level in the idle state and the configuration of the data sampling position. These parameters should be determined in combination with the specific requirements of the operated device.

3. Experimental Content

1. Hardware connection

According to the port situation of the GD32L233C-START development board and the convenience of connecting the OLED module, the SPI1 module was selected.

2. Program implementation

The main controller of the OLED module used in the experiment is "SH1106".

static void spi_config(void)
{
#ifdef SPI_HARDWARE
	spi_parameter_struct  spi_init_struct;
	
	rcu_periph_clock_enable(RCU_GPIOB);
	rcu_periph_clock_enable(RCU_SPI1);

	spi_i2s_deinit(SPI1);
	spi_struct_para_init(&spi_init_struct);
	
	/* 配置OLED引脚： CS/PB10; DC/PB11; RES/PB14 */
	gpio_mode_set(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_10 | GPIO_PIN_11| GPIO_PIN_14);
	gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_10 | GPIO_PIN_11| GPIO_PIN_14);
	
	/* 配置SPI1 SCK/PB13; MOSI/PB15 */
	gpio_af_set(GPIOB, GPIO_AF_6, GPIO_PIN_13 | GPIO_PIN_15);
	gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_13 | GPIO_PIN_15);
	gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_13 | GPIO_PIN_15);

	spi_init_struct.trans_mode           = SPI_TRANSMODE_BDTRANSMIT;
	spi_init_struct.device_mode          = SPI_MASTER;
	spi_init_struct.frame_size           = SPI_FRAMESIZE_8BIT;
	spi_init_struct.clock_polarity_phase = SPI_CK_PL_LOW_PH_1EDGE; //CKPL=0;CKPH=1 
	//spi_init_struct.clock_polarity_phase = SPI_CK_PL_HIGH_PH_2EDGE;
	spi_init_struct.nss                  = SPI_NSS_SOFT;
	spi_init_struct.prescale             = SPI_PSC_8 ;
	spi_init_struct.endian               = SPI_ENDIAN_MSB;
	
	spi_init(SPI1, &spi_init_struct);

  spi_enable(SPI1);
#else
	rcu_periph_clock_enable(RCU_GPIOB);

	gpio_mode_set(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, OLED_PORT_IS);
	gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, OLED_PORT_IS);
	
#endif
}

The program is compatible with software and hardware working modes. SPI is configured as host transmission and only sends data to OLED.

3. Experimental results

4. Attachments

Attached is the complete project for this experiment, supporting software and hardware SPI.

游客，如果您要查看本帖隐藏内容请回复

chrisrh

kukawho

good

hsp398083597

Is it a complete SPI control program?

szpttboy

To top

青年123

good

Janision

Learn

Honghuzaitian

After learning, other chips can also be transplanted.

aggwg

11111

freebsder

Thanks for sharing, looking forward to the follow-up.

是丫丫呀

Learn

leafer

Study

Celtic_yu

Learn

gzkenny

Haha, good idea, thank you for your affirmation, good, good, good

点击完成

1234

点击完成

1234

Angle145

Thanks, I'll try it

wqdqwdq

good

lkh747566933

Very good information, worth learning. Thumbs up. Thank you for sharing!!

Johnny1

Study