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SPI3 support

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This commit is contained in:
lilian 2016-12-05 14:25:56 +01:00
parent 0b063730f3
commit 455fc6f940
3 changed files with 38 additions and 6 deletions
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4
extras/ssd1306/config.h
View file

@ -9,4 +9,8 @@
#define SSD1306_SPI4_SUPPORT 1
#endif
#ifndef SSD1306_SPI3_SUPPORT
#define SSD1306_SPI3_SUPPORT 1
#endif
#endif /* _EXTRAS_SSD1306_CONFIG_H_ */

32
extras/ssd1306/ssd1306.c
View file

@ -118,6 +118,15 @@ int ssd1306_command(const ssd1306_t *dev, uint8_t cmd)
spi_transfer_8(SPI_BUS, cmd);
gpio_write(dev->cs_pin, true);
break;
#endif
#if (SSD1306_SPI3_SUPPORT)
case SSD1306_PROTO_SPI3:
gpio_write(dev->cs_pin, false);
spi_set_command(SPI_BUS,1,0); // command mode
spi_transfer_8(SPI_BUS, cmd);
spi_clear_command(SPI_BUS);
gpio_write(dev->cs_pin, true);
break;
#endif
default:
debug("Unsupported protocol");
@ -157,6 +166,13 @@ int ssd1306_init(const ssd1306_t *dev)
gpio_enable(dev->dc_pin, GPIO_OUTPUT);
spi_init(SPI_BUS, SPI_MODE0, SPI_FREQ_DIV_8M, true, SPI_LITTLE_ENDIAN, true);
break;
#endif
#if (SSD1306_SPI3_SUPPORT)
case SSD1306_PROTO_SPI3:
gpio_enable(dev->cs_pin, GPIO_OUTPUT);
gpio_write(dev->cs_pin, true);
spi_init(SPI_BUS, SPI_MODE0, SPI_FREQ_DIV_8M, true, SPI_LITTLE_ENDIAN, true);
break;
#endif
default:
debug("Unsupported protocol");
@ -232,9 +248,19 @@ int ssd1306_load_frame_buffer(const ssd1306_t *dev, uint8_t buf[])
if (buf)
spi_transfer(SPI_BUS, buf, NULL, len, SPI_8BIT);
else
for (i = 0; i < len; i ++) {
spi_transfer_8(SPI_BUS, 0);
}
spi_repeat_send_8(SPI_BUS,0,len);
gpio_write(dev->cs_pin, true);
break;
#endif
#if (SSD1306_SPI3_SUPPORT)
case SSD1306_PROTO_SPI3:
spi_set_command(SPI_BUS,1,1); // data mode
gpio_write(dev->cs_pin, false);
if (buf)
spi_transfer(SPI_BUS, buf, NULL, len, SPI_8BIT);
else
spi_repeat_send_8(SPI_BUS,0,len);
spi_clear_command(SPI_BUS);
gpio_write(dev->cs_pin, true);
break;
#endif

8
extras/ssd1306/ssd1306.h
View file

@ -35,7 +35,7 @@ typedef enum
{
SSD1306_PROTO_I2C = 0, //!< I2C
SSD1306_PROTO_SPI4, //!< SPI 8 bits + D/C pin
SSD1306_PROTO_SPI3 //!< SPI 9 bits, currently not supported
SSD1306_PROTO_SPI3 //!< SPI 9 bits
} ssd1306_protocol_t;
/**
@ -44,11 +44,13 @@ typedef enum
typedef struct
{
ssd1306_protocol_t protocol;
union {
#if (SSD1306_I2C_SUPPORT)
uint8_t addr; //!< I2C address, used by SSD1306_PROTO_I2C
uint8_t addr ; //!< I2C address, used by SSD1306_PROTO_I2C
#endif
uint8_t cs_pin ; //!< Chip Select GPIO pin, used by SSD1306_PROTO_SPI3, SSD1306_PROTO_SPI4
} ;
#if (SSD1306_SPI4_SUPPORT)
uint8_t cs_pin; //!< Chip Select GPIO pin, used by SSD1306_PROTO_SPI3, SSD1306_PROTO_SPI4
uint8_t dc_pin; //!< Data/Command GPIO pin, used by SSD1306_PROTO_SPI4
#endif
uint8_t width; //!< Screen width, currently supported 128px, 96px